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<title>Knative – Knative Serving &#39;Cloud Events&#39; samples</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/</link>
<description>Recent content in Knative Serving &#39;Cloud Events&#39; samples on Knative</description>
<generator>Hugo -- gohugo.io</generator>
<atom:link href="https://knative.dev/docs/serving/samples/cloudevents/index.xml" rel="self" type="application/rss+xml" />
<item>
<title>Docs: Cloud Events - .NET Core</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-dotnet/</link>
<pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
<guid>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-dotnet/</guid>
<description>
&lt;p&gt;A simple web app written in ASP.NET and C# that can receive and send Cloud Events that you
can use for testing. It supports running in two modes:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;The default mode has the app reply to your input events with the output
event, which is simplest for demonstrating things working in isolation, but
is also the model for working for the Knative Eventing &lt;code&gt;Broker&lt;/code&gt; concept.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;K_SINK&lt;/code&gt; mode has the app send events to the destination encoded in
&lt;code&gt;$K_SINK&lt;/code&gt;, which is useful to demonstrate how folks can synthesize events to
send to a Service or Broker when not initiated by a Broker invocation (e.g.
implementing an event source)&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;The application will use &lt;code&gt;$K_SINK&lt;/code&gt;-mode whenever the environment variable is
specified.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample, by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;release-0.23&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/cloudevents/cloudevents-dotnet
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../../install/&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;the-sample-code&#34;&gt;The sample code&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;If you look in &lt;code&gt;controllers\CloudEventsController.cs&lt;/code&gt;, you will see two key functions for the
different modes of operation:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-csharp&#34; data-lang=&#34;csharp&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;private&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;async&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;Task&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;&amp;lt;&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;IActionResult&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;&amp;gt;&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;ReceiveAndSend&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;CloudEvent&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;receivedEvent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This is called whenever an event is received if $K_SINK is set, and sends a new event
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// to the url in $K_SINK.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;private&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;IActionResult&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;ReceiveAndReply&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;CloudEvent&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;receivedEvent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This is called whenever an event is received if $K_SINK is NOT set, and it replies with
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// the new event instead.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;If you look in &lt;code&gt;Dockerfile&lt;/code&gt;, you will see a method for pulling in the
dependencies and building an ASP.NET container based on Alpine. You can build
and push this to your registry of choice via:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker build -t &amp;lt;image&amp;gt; .
docker push &amp;lt;image&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;If you look in &lt;code&gt;service.yaml&lt;/code&gt;, take the &lt;code&gt;&amp;lt;image&amp;gt;&lt;/code&gt; name above and insert it
into the &lt;code&gt;image:&lt;/code&gt; field.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;testing-the-sample&#34;&gt;Testing the sample&lt;/h2&gt;
&lt;p&gt;Get the URL for your Service with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc
NAME URL LATESTCREATED LATESTREADY READY REASON
cloudevents-dotnet http://cloudevents-dotnet... cloudevents-dotnet-ss5pj cloudevents-dotnet-ss5pj True
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Then send a cloud event to it with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ curl -X POST &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; &amp;lt;URL from kubectl &lt;span style=&#34;color:#204a87&#34;&gt;command&lt;/span&gt; above&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You will get back:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-json&#34; data-lang=&#34;json&#34;&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;specversion&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;1.0&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;type&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;dev.knative.docs.sample&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;source&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;https://github.com/knative/docs/docs/serving/samples/cloudevents/cloudevents-dotnet&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;id&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;d662b6f6-35ff-4b98-bffd-5ae9eee23dab&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;time&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;2020-05-19T01:26:23.3500138Z&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;datacontenttype&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;application/json&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;data&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;&amp;#34;message&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Hello, Dave&amp;#34;&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service record:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
</description>
</item>
<item>
<title>Docs: Cloud Events - Go</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-go/</link>
<pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
<guid>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-go/</guid>
<description>
&lt;p&gt;A simple web app written in Go that can receive and send Cloud Events that you
can use for testing. It supports running in two modes:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;The default mode has the app reply to your input events with the output
event, which is simplest for demonstrating things working in isolation, but
is also the model for working for the Knative Eventing &lt;code&gt;Broker&lt;/code&gt; concept.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;K_SINK&lt;/code&gt; mode has the app send events to the destination encoded in
&lt;code&gt;$K_SINK&lt;/code&gt;, which is useful to demonstrate how folks can synthesize events to
send to a Service or Broker when not initiated by a Broker invocation (e.g.
implementing an event source)&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;The application will use &lt;code&gt;$K_SINK&lt;/code&gt;-mode whenever the environment variable is
specified.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample, by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;release-0.23&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/cloudevents/cloudevents-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../../install/&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;the-sample-code&#34;&gt;The sample code.&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;If you look in &lt;code&gt;cloudevents.go&lt;/code&gt;, you will see two key functions for the
different modes of operation:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-go&#34; data-lang=&#34;go&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;recv&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;*&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Receiver&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;ReceiveAndSend&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ctx&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;context&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Context&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;event&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;cloudevents&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Event&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;cloudevents&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Result&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This is called whenever an event is received if $K_SINK is set, and sends a new event
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// to the url in $K_SINK.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;recv&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;*&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Receiver&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;ReceiveAndReply&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ctx&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;context&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Context&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;event&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;cloudevents&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Event&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;*&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;cloudevents&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Event&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;cloudevents&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Result&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This is called whenever an event is received if $K_SINK is NOT set, and it replies with
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// the new event instead.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Choose how you would like to build the application:&lt;/p&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_go_build&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_go_build-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_go_build-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_go_build-0&#34; aria-selected=&#34;true&#34;&gt;Dockerfile&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_go_build-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_go_build-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_go_build-1&#34; aria-selected=&#34;true&#34;&gt;ko&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_go_build-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_go_build-0-tab&#34;&gt;
&lt;p&gt;If you look in &lt;code&gt;Dockerfile&lt;/code&gt;, you will see a method for pulling in the
dependencies and building a small Go container based on Alpine. You can build
and push this to your registry of choice via:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker build -t &amp;lt;image&amp;gt; .
docker push &amp;lt;image&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_go_build-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_go_build-1-tab&#34;&gt;
&lt;p&gt;You can use &lt;a href=&#34;https://github.com/google/ko&#34;&gt;&lt;code&gt;ko&lt;/code&gt;&lt;/a&gt; to build and push just the image with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;ko publish github.com/knative/docs/docs/serving/samples/cloudevents/cloudevents-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;However, if you use &lt;code&gt;ko&lt;/code&gt; for the next step, this is not necessary.&lt;/p&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Choose how you would like to deploy the application:&lt;/p&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_go_deploy&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_go_deploy-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_go_deploy-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_go_deploy-0&#34; aria-selected=&#34;true&#34;&gt;yaml (with Dockerfile)&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_go_deploy-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_go_deploy-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_go_deploy-1&#34; aria-selected=&#34;true&#34;&gt;yaml (with ko)&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_go_deploy-2-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_go_deploy-2&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_go_deploy-2&#34; aria-selected=&#34;true&#34;&gt;kn (with Dockerfile)&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_go_deploy-3-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_go_deploy-3&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_go_deploy-3&#34; aria-selected=&#34;true&#34;&gt;kn (with ko)&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_go_deploy-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_go_deploy-0-tab&#34;&gt;
&lt;p&gt;If you look in &lt;code&gt;service.yaml&lt;/code&gt;, take the &lt;code&gt;&amp;lt;image&amp;gt;&lt;/code&gt; name above and insert it
into the &lt;code&gt;image:&lt;/code&gt; field, then run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_go_deploy-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_go_deploy-1-tab&#34;&gt;
&lt;p&gt;If using &lt;code&gt;ko&lt;/code&gt; to build and push:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;ko apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_go_deploy-2&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_go_deploy-2-tab&#34;&gt;
&lt;p&gt;If using &lt;code&gt;kn&lt;/code&gt; to deploy:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service create cloudevents-go --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&amp;lt;IMAGE&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_go_deploy-3&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_go_deploy-3-tab&#34;&gt;
&lt;p&gt;You can compose &lt;code&gt;kn&lt;/code&gt; and &lt;code&gt;ko&lt;/code&gt; to build and deploy with a single step using:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service create cloudevents-go --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;$(&lt;/span&gt;ko publish github.com/knative/docs/docs/serving/samples/cloudevents/cloudevents-go&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;)&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;testing-the-sample&#34;&gt;Testing the sample&lt;/h2&gt;
&lt;p&gt;Get the URL for your Service with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc
NAME URL LATESTCREATED LATESTREADY READY REASON
cloudevents-go http://cloudevents-go.default.1.2.3.4.sslip.io cloudevents-go-ss5pj cloudevents-go-ss5pj True
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Then send a cloud event to it with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ curl -X POST &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-go.default.1.2.3.4.sslip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You will get back:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;message&amp;#34;&lt;/span&gt;:&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Hello, Dave&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service record:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
</description>
</item>
<item>
<title>Docs: Cloud Events - Java and Spring</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-spring/</link>
<pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
<guid>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-spring/</guid>
<description>
&lt;p&gt;A simple web app written in Java using Spring Cloud Function that can receive CloudEvents. It
supports running in two modes:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;The default mode has the app reply to your input events with the output
event, which is simplest for demonstrating things working in isolation, but
is also the model for working with the Knative Eventing &lt;code&gt;Broker&lt;/code&gt; concept. The
input event is modified assigning a new source and type attribute.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;K_SINK&lt;/code&gt; mode has the app send events to the destination encoded in
&lt;code&gt;$K_SINK&lt;/code&gt;, which is useful to demonstrate how folks can synthesize events to
send to a Service or Broker when not initiated by a Broker invocation (e.g.
implementing an event source). The input event is modified assigning a new
source and type attribute.&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;The application will use &lt;code&gt;$K_SINK&lt;/code&gt;-mode whenever the environment variable is
specified.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample, by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;release-0.23&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/cloudevents/cloudevents-spring
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../../install/&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;build-and-deploy-the-sample&#34;&gt;Build and deploy the sample&lt;/h2&gt;
&lt;p&gt;To build the image, run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;mvn compile jib:build -Dimage&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&amp;lt;image_name&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;To deploy the Knative Service, edit the &lt;code&gt;service.yaml&lt;/code&gt; file and replace &lt;code&gt;&amp;lt;image&amp;gt;&lt;/code&gt;
with the deployed image name. Then run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;testing-the-sample&#34;&gt;Testing the sample&lt;/h2&gt;
&lt;p&gt;Get the URL for your Service with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc
NAME URL LATESTCREATED LATESTREADY READY REASON
cloudevents-spring http://cloudevents-java.sslip.io cloudevents-spring-86h28 cloudevents-spring-86h28 True
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Then send a CloudEvent to it with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ curl &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -X POST -v &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: http://curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-java.sslip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You can also send CloudEvents spawning a temporary curl pod in your cluster
with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl run curl &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;curlimages/curl --rm&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#204a87&#34;&gt;true&lt;/span&gt; --restart&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;Never -ti -- &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -X POST -v &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: http://curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-java.default.svc
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You&amp;rsquo;ll see on the console:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&amp;gt; POST / HTTP/1.1
&amp;gt; Host: localhost:8080
&amp;gt; User-Agent: curl/7.69.1
&amp;gt; Accept: */*
&amp;gt; content-type: application/json
&amp;gt; ce-specversion: 1.0
&amp;gt; ce-source: http://curl-command
&amp;gt; ce-type: curl.demo
&amp;gt; ce-id: 123-abc
&amp;gt; Content-Length: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;15&lt;/span&gt;
&amp;gt;
&amp;lt; HTTP/1.1 &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;202&lt;/span&gt; Accepted
&amp;lt; ce-specversion: 1.0
&amp;lt; ce-id: 123-abc
&amp;lt; ce-source: https://github.com/knative/docs/docs/serving/samples/cloudevents/cloudevents-spring
&amp;lt; ce-type: curl.demo
&amp;lt; content-type: application/json
&amp;lt; content-length: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;15&lt;/span&gt;
&amp;lt;
&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;name&amp;#34;&lt;/span&gt;:&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Dave&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service record:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment-1&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service:&lt;/p&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_spring_delete&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_spring_delete-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_spring_delete-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_spring_delete-0&#34; aria-selected=&#34;true&#34;&gt;yaml&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_spring_delete-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_spring_delete-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_spring_delete-1&#34; aria-selected=&#34;true&#34;&gt;kn&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_spring_delete-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_spring_delete-0-tab&#34;&gt;
&lt;p&gt;Run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_spring_delete-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_spring_delete-1-tab&#34;&gt;
&lt;p&gt;Run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service delete cloudevents-spring
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</description>
</item>
<item>
<title>Docs: Cloud Events - Java and Vert.x</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-vertx/</link>
<pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
<guid>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-vertx/</guid>
<description>
&lt;p&gt;A simple web app written in Java using Vert.x that can receive CloudEvents. It
supports running in two modes:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;The default mode has the app reply to your input events with the output
event, which is simplest for demonstrating things working in isolation, but
is also the model for working for the Knative Eventing &lt;code&gt;Broker&lt;/code&gt; concept. The
input event is modified assigning a new source and type attribute.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;K_SINK&lt;/code&gt; mode has the app send events to the destination encoded in
&lt;code&gt;$K_SINK&lt;/code&gt;, which is useful to demonstrate how folks can synthesize events to
send to a Service or Broker when not initiated by a Broker invocation (e.g.
implementing an event source). The input event is modified assigning a new
source and type attribute.&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;The application will use &lt;code&gt;$K_SINK&lt;/code&gt;-mode whenever the environment variable is
specified.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample, by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;release-0.23&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/cloudevents/cloudevents-vertx
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../../install/&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;build-and-deploy-the-sample&#34;&gt;Build and deploy the sample&lt;/h2&gt;
&lt;p&gt;To build the image, run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;mvn compile jib:build -Dimage&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&amp;lt;image_name&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_vertx_deploy&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_vertx_deploy-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_vertx_deploy-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_vertx_deploy-0&#34; aria-selected=&#34;true&#34;&gt;yaml&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_vertx_deploy-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_vertx_deploy-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_vertx_deploy-1&#34; aria-selected=&#34;true&#34;&gt;kn&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_vertx_deploy-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_vertx_deploy-0-tab&#34;&gt;
&lt;p&gt;To deploy the Knative Service, look in the &lt;code&gt;service.yaml&lt;/code&gt; and replace &lt;code&gt;&amp;lt;image&amp;gt;&lt;/code&gt; with the deployed image name. Then run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_vertx_deploy-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_vertx_deploy-1-tab&#34;&gt;
&lt;p&gt;If using &lt;code&gt;kn&lt;/code&gt; to deploy:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service create cloudevents-vertx --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&amp;lt;image&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;h2 id=&#34;testing-the-sample&#34;&gt;Testing the sample&lt;/h2&gt;
&lt;p&gt;Get the URL for your Service with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc
NAME URL LATESTCREATED LATESTREADY READY REASON
cloudevents-vertx http://cloudevents-java.sslip.io cloudevents-vertx-86h28 cloudevents-vertx-86h28 True
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Then send a CloudEvent to it with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ curl &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -X POST -v &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: http://curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-java.sslip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You can also send CloudEvents spawning a temporary curl pod in your cluster
with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl run curl &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;curlimages/curl --rm&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#204a87&#34;&gt;true&lt;/span&gt; --restart&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;Never -ti -- &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -X POST -v &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: http://curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-java.default.svc
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You&amp;rsquo;ll see on the console:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&amp;gt; POST / HTTP/1.1
&amp;gt; Host: localhost:8080
&amp;gt; User-Agent: curl/7.69.1
&amp;gt; Accept: */*
&amp;gt; content-type: application/json
&amp;gt; ce-specversion: 1.0
&amp;gt; ce-source: http://curl-command
&amp;gt; ce-type: curl.demo
&amp;gt; ce-id: 123-abc
&amp;gt; Content-Length: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;15&lt;/span&gt;
&amp;gt;
&amp;lt; HTTP/1.1 &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;202&lt;/span&gt; Accepted
&amp;lt; ce-specversion: 1.0
&amp;lt; ce-id: 123-abc
&amp;lt; ce-source: https://github.com/knative/docs/docs/serving/samples/cloudevents/cloudevents-vertx
&amp;lt; ce-type: curl.demo
&amp;lt; content-type: application/json
&amp;lt; content-length: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;15&lt;/span&gt;
&amp;lt;
&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;name&amp;#34;&lt;/span&gt;:&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Dave&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service:&lt;/p&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_vertx_delete&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_vertx_delete-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_vertx_delete-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_vertx_delete-0&#34; aria-selected=&#34;true&#34;&gt;yaml&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_vertx_delete-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_vertx_delete-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_vertx_delete-1&#34; aria-selected=&#34;true&#34;&gt;kn&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_vertx_delete-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_vertx_delete-0-tab&#34;&gt;
&lt;p&gt;Run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_vertx_delete-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_vertx_delete-1-tab&#34;&gt;
&lt;p&gt;Run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service delete cloudevents-vertx
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</description>
</item>
<item>
<title>Docs: Cloud Events - Node.js</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-nodejs/</link>
<pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
<guid>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-nodejs/</guid>
<description>
&lt;p&gt;A simple web app written in Node.js that can receive and send Cloud Events that you
can use for testing. It supports running in two modes:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;The default mode has the app reply to your input events with the output
event, which is simplest for demonstrating things working in isolation, but
is also the model for working for the Knative Eventing &lt;code&gt;Broker&lt;/code&gt; concept.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;K_SINK&lt;/code&gt; mode has the app send events to the destination encoded in
&lt;code&gt;$K_SINK&lt;/code&gt;, which is useful to demonstrate how folks can synthesize events to
send to a Service or Broker when not initiated by a Broker invocation (e.g.
implementing an event source)&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;The application will use &lt;code&gt;$K_SINK&lt;/code&gt;-mode whenever the environment variable is
specified.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample, by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;release-0.23&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/cloudevents/cloudevents-nodejs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../../install/&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;the-sample-code&#34;&gt;The Sample Code&lt;/h2&gt;
&lt;p&gt;In the &lt;code&gt;index.js&lt;/code&gt; file, you will see two key functions for the different modes
of operation:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-js&#34; data-lang=&#34;js&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;const&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;receiveAndSend&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;cloudEvent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;res&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&amp;gt;&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This is called whenever an event is received if $K_SINK is set, and sends a new event
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// to the url in $K_SINK.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;const&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;receiveAndReply&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;cloudEvent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;res&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&amp;gt;&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This is called whenever an event is received if $K_SINK is NOT set, and it replies with
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// the new event instead.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;build-and-deploy-the-application&#34;&gt;Build and Deploy the Application&lt;/h2&gt;
&lt;p&gt;In the &lt;code&gt;Dockerfile&lt;/code&gt;, you can see how the dependencies are installed using npm.
You can build and push this to your registry of choice via:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker build -t &amp;lt;image&amp;gt; .
docker push &amp;lt;image&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_nodejs_deploy&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_nodejs_deploy-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_nodejs_deploy-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_nodejs_deploy-0&#34; aria-selected=&#34;true&#34;&gt;yaml&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_nodejs_deploy-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_nodejs_deploy-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_nodejs_deploy-1&#34; aria-selected=&#34;true&#34;&gt;kn&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_nodejs_deploy-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_nodejs_deploy-0-tab&#34;&gt;
&lt;p&gt;To deploy the Knative service, edit the &lt;code&gt;service.yaml&lt;/code&gt; file and replace
&lt;code&gt;&amp;lt;registry/repository/image:tag&amp;gt;&lt;/code&gt; with the image you have just created.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_nodejs_deploy-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_nodejs_deploy-1-tab&#34;&gt;
&lt;p&gt;To deploy using the &lt;code&gt;kn&lt;/code&gt; CLI:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service create cloudevents-nodejs --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&amp;lt;image&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;{{ /tab }}{{ /tabs }}&lt;/p&gt;
&lt;h2 id=&#34;testing-the-sample&#34;&gt;Testing the sample&lt;/h2&gt;
&lt;p&gt;Get the URL for your Service with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc
NAME URL LATESTCREATED LATESTREADY READY REASON
cloudevents-nodejs http://cloudevents-nodejs.default.1.2.3.4.sslip.io cloudevents-nodejs-ss5pj cloudevents-nodejs-ss5pj True
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Then send a cloud event to it with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ curl -X POST &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-nodejs.default.1.2.3.4.sslip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You will get back:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;message&amp;#34;&lt;/span&gt;:&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Hello, Dave&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service.&lt;/p&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_nodejs_delete&#34; role=&#34;tablist&#34;&gt;
&lt;pre&gt;&lt;code&gt;&amp;lt;li class=&amp;quot;nav-item &amp;quot;&amp;gt;
&amp;lt;a class=&amp;quot;nav-link &amp;quot; id=&amp;quot;cloudevents_nodejs_delete-0-tab&amp;quot; data-toggle=&amp;quot;tab&amp;quot; href=&amp;quot;#cloudevents_nodejs_delete-0&amp;quot; role=&amp;quot;tab&amp;quot; aria-controls=&amp;quot;cloudevents_nodejs_delete-0&amp;quot; aria-selected=&amp;quot;true&amp;quot;&amp;gt;yaml&amp;lt;/a&amp;gt;
&amp;lt;/li&amp;gt;
&amp;lt;li class=&amp;quot;nav-item active&amp;quot;&amp;gt;
&amp;lt;a class=&amp;quot;nav-link active&amp;quot; id=&amp;quot;cloudevents_nodejs_delete-1-tab&amp;quot; data-toggle=&amp;quot;tab&amp;quot; href=&amp;quot;#cloudevents_nodejs_delete-1&amp;quot; role=&amp;quot;tab&amp;quot; aria-controls=&amp;quot;cloudevents_nodejs_delete-1&amp;quot; aria-selected=&amp;quot;true&amp;quot;&amp;gt;kn&amp;lt;/a&amp;gt;
&amp;lt;/li&amp;gt;
&lt;/code&gt;&lt;/pre&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_nodejs_delete-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_nodejs_delete-0-tab&#34;&gt;
&lt;pre&gt;&lt;code&gt; &amp;lt;p&amp;gt;Run:&amp;lt;/p&amp;gt;
&lt;/code&gt;&lt;/pre&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_nodejs_delete-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_nodejs_delete-1-tab&#34;&gt;
&lt;pre&gt;&lt;code&gt; &amp;lt;p&amp;gt;Run:&amp;lt;/p&amp;gt;
&lt;/code&gt;&lt;/pre&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service delete cloudevents-nodejs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;{{ /tab }}{{ /tabs }}&lt;/p&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</description>
</item>
<item>
<title>Docs: Cloud Events - Rust</title>
<link>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-rust/</link>
<pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
<guid>https://knative.dev/docs/serving/samples/cloudevents/cloudevents-rust/</guid>
<description>
&lt;p&gt;A simple web app written in Rust using &lt;a href=&#34;https://github.com/actix/actix-web&#34;&gt;Actix web&lt;/a&gt;
that can receive CloudEvents. It supports running in two modes:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;The default mode has the app reply to your input events with the output
event, which is simplest for demonstrating things working in isolation, but
is also the model for working for the Knative Eventing &lt;code&gt;Broker&lt;/code&gt; concept.
The input event is modified assigning a new source and type attribute.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;K_SINK&lt;/code&gt; mode has the app send events to the destination encoded in
&lt;code&gt;$K_SINK&lt;/code&gt;, which is useful to demonstrate how folks can synthesize events to
send to a Service or Broker when not initiated by a Broker invocation (e.g.
implementing an event source).
The input event is modified assigning a new source and type attribute.&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;The application will use &lt;code&gt;$K_SINK&lt;/code&gt;-mode whenever the environment variable is
specified.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;release-0.23&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/cloudevents/cloudevents-rust
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../../install/&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;li&gt;This guide uses Rust &lt;code&gt;musl&lt;/code&gt; toolchain to build the image in order to create
really small docker images. To install the Rust toolchain: &lt;a href=&#34;https://rustup.rs/&#34;&gt;&lt;code&gt;rustup&lt;/code&gt;&lt;/a&gt;.
To install musl support: &lt;a href=&#34;https://doc.rust-lang.org/edition-guide/rust-2018/platform-and-target-support/musl-support-for-fully-static-binaries.html&#34;&gt;MUSL support for fully static binaries&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;build-and-deploy-the-sample&#34;&gt;Build and deploy the sample&lt;/h2&gt;
&lt;p&gt;To build the binary, run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;cargo build --target x86_64-unknown-linux-musl --release
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;This will build a statically linked binary, in order to create an image from scratch. Now build the docker image:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker build -t &amp;lt;image&amp;gt; .
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_rust_deploy&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_rust_deploy-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_rust_deploy-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_rust_deploy-0&#34; aria-selected=&#34;true&#34;&gt;yaml&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_rust_deploy-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_rust_deploy-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_rust_deploy-1&#34; aria-selected=&#34;true&#34;&gt;kn&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_rust_deploy-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_rust_deploy-0-tab&#34;&gt;
&lt;p&gt;To deploy the Knative Service, look in the &lt;code&gt;service.yaml&lt;/code&gt; and replace &lt;code&gt;&amp;lt;image&amp;gt;&lt;/code&gt; with the deployed image name. Then run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply -f service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_rust_deploy-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_rust_deploy-1-tab&#34;&gt;
&lt;p&gt;If using &lt;code&gt;kn&lt;/code&gt; to deploy:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service create cloudevents-rust --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&amp;lt;image&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;h2 id=&#34;testing-the-sample&#34;&gt;Testing the sample&lt;/h2&gt;
&lt;p&gt;Get the URL for your Service with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc
NAME URL LATESTCREATED LATESTREADY READY REASON
cloudevents-rust http://cloudevents-rust.sslip.io cloudevents-rust-vl8fq cloudevents-rust-vl8fq True
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Then send a CloudEvent to it with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ curl &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -X POST -v &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: http://curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-rust.sslip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You can also send CloudEvents spawning a temporary curl pod in your cluster with:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl run curl &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; --image&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;curlimages/curl --rm&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#204a87&#34;&gt;true&lt;/span&gt; --restart&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;Never -ti -- &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -X POST -v &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;content-type: application/json&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-specversion: 1.0&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-source: http://curl-command&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-type: curl.demo&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -H &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;ce-id: 123-abc&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; -d &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{&amp;#34;name&amp;#34;:&amp;#34;Dave&amp;#34;}&amp;#39;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; http://cloudevents-rust.default.svc
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You&amp;rsquo;ll get as result:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&amp;gt; POST / HTTP/1.1
&amp;gt; Host: localhost:8080
&amp;gt; User-Agent: curl/7.69.1
&amp;gt; Accept: */*
&amp;gt; content-type: application/json
&amp;gt; ce-specversion: 1.0
&amp;gt; ce-source: http://curl-command
&amp;gt; ce-type: curl.demo
&amp;gt; ce-id: 123-abc
&amp;gt; Content-Length: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;15&lt;/span&gt;
&amp;gt;
&amp;lt; HTTP/1.1 &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;200&lt;/span&gt; OK
&amp;lt; content-length: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;15&lt;/span&gt;
&amp;lt; content-type: application/json
&amp;lt; ce-specversion: 1.0
&amp;lt; ce-id: 123-abc
&amp;lt; ce-type: dev.knative.docs.sample
&amp;lt; ce-source: https://github.com/knative/docs/docs/serving/samples/cloudevents/cloudevents-rust
&amp;lt; date: Sat, &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;23&lt;/span&gt; May &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;2020&lt;/span&gt; 09:00:01 GMT
&amp;lt;
&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;name&amp;#34;&lt;/span&gt;:&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Dave&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service.&lt;/p&gt;
&lt;ul class=&#34;nav nav-tabs&#34; id=&#34;cloudevents_rust_delete&#34; role=&#34;tablist&#34;&gt;
&lt;li class=&#34;nav-item &#34;&gt;
&lt;a class=&#34;nav-link &#34; id=&#34;cloudevents_rust_delete-0-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_rust_delete-0&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_rust_delete-0&#34; aria-selected=&#34;true&#34;&gt;yaml&lt;/a&gt;
&lt;/li&gt;
&lt;li class=&#34;nav-item active&#34;&gt;
&lt;a class=&#34;nav-link active&#34; id=&#34;cloudevents_rust_delete-1-tab&#34; data-toggle=&#34;tab&#34; href=&#34;#cloudevents_rust_delete-1&#34; role=&#34;tab&#34; aria-controls=&#34;cloudevents_rust_delete-1&#34; aria-selected=&#34;true&#34;&gt;kn&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;tab-content&#34; &gt;
&lt;div class=&#34;tab-pane fade &#34; id=&#34;cloudevents_rust_delete-0&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_rust_delete-0-tab&#34;&gt;
&lt;p&gt;Run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;div class=&#34;tab-pane fade show active&#34; id=&#34;cloudevents_rust_delete-1&#34; role=&#34;tabpanel&#34; aria-labelledby=&#34;cloudevents_rust_delete-1-tab&#34;&gt;
&lt;p&gt;Run:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kn service delete cloudevents-rust
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</description>
</item>
</channel>
</rss>
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