mirror of https://github.com/dapr/docs.git
add java to quickstart
Signed-off-by: Hannah Hunter <hannahhunter@microsoft.com>
This commit is contained in:
Hannah Hunter
parent
bac59579af
commit
e3af25cbb5
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@ -23,7 +23,7 @@ In this guide, you'll:
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{{< tabs "Python" ".NET" "Java" >}}
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<!-- Python -->
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<!-- Python -->
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{{% codetab %}}
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The `order-processor` console app starts and manages the `order_processing_workflow`, which simulates purchasing items from a store. The workflow consists of five unique workflow activities, or tasks:
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@ -103,7 +103,19 @@ Expected output:
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If you have Zipkin configured for Dapr locally on your machine, you can view the workflow trace spans in the Zipkin web UI (typically at `http://localhost:9411/zipkin/`).
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<img src="/images/workflow-trace-spans-zipkin-python.png" width=900 style="padding-bottom:15px;">
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### (Optional) Step 4: View in Zipkin
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If you have Zipkin configured for Dapr locally on your machine, you can
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Running `dapr init` launches the [openzipkin/zipkin](https://hub.docker.com/r/openzipkin/zipkin/) Docker container. If the container has stopped running, launch the Zipkin Docker container with the following command:
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```
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docker run -d -p 9411:9411 openzipkin/zipkin
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```
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View the workflow trace spans in the Zipkin web UI (typically at `http://localhost:9411/zipkin/`).
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<img src="/images/workflow-trace-spans-zipkin.png" width=800 style="padding-bottom:15px;">
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### What happened?
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@ -337,7 +349,15 @@ Expected output:
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### (Optional) Step 4: View in Zipkin
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If you have Zipkin configured for Dapr locally on your machine, you can view the workflow trace spans in the Zipkin web UI (typically at `http://localhost:9411/zipkin/`).
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If you have Zipkin configured for Dapr locally on your machine, you can
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Running `dapr init` launches the [openzipkin/zipkin](https://hub.docker.com/r/openzipkin/zipkin/) Docker container. If the container has stopped running, launch the Zipkin Docker container with the following command:
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```
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docker run -d -p 9411:9411 openzipkin/zipkin
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```
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View the workflow trace spans in the Zipkin web UI (typically at `http://localhost:9411/zipkin/`).
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<img src="/images/workflow-trace-spans-zipkin.png" width=800 style="padding-bottom:15px;">
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@ -492,13 +512,23 @@ The `Activities` directory holds the four workflow activities used by the workfl
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- `ProcessPaymentActivity.cs`
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- `UpdateInventoryActivity.cs`
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## Watch the demo
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Watch [this video to walk through the Dapr Workflow .NET demo](https://youtu.be/BxiKpEmchgQ?t=2564):
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<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/BxiKpEmchgQ?start=2564" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
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{{% /codetab %}}
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<!-- Java -->
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{{% codetab %}}
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The `order-processor` console app starts and manages the lifecycle of an order processing workflow that stores and retrieves data in a state store. The workflow consists of four workflow activities, or tasks:
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-
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- `NotifyActivity`: Utilizes a logger to print out messages throughout the workflow
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- `RequestApprovalActivity`: Requests approval for processing payment
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- `ReserveInventoryActivity`: Checks the state store to ensure that there is enough inventory for the purchase
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- `ProcessPaymentActivity`: Processes and authorizes the payment
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- `UpdateInventoryActivity`: Removes the requested items from the state store and updates the store with the new remaining inventory value
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### Step 1: Pre-requisites
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@ -507,9 +537,10 @@ For this example, you will need:
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- [Dapr CLI and initialized environment](https://docs.dapr.io/getting-started).
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- Java JDK 11 (or greater):
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- [Oracle JDK](https://www.oracle.com/java/technologies/downloads), or
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- OpenJDK
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- [Apache Maven](https://maven.apache.org/install.html), version 3.x.
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- [Microsoft JDK 11](https://docs.microsoft.com/en-us/java/openjdk/download#openjdk-11)
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- [Oracle JDK 11](https://www.oracle.com/technetwork/java/javase/downloads/index.html#JDK11)
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- [OpenJDK 11](https://jdk.java.net/11/)
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- [Apache Maven](https://maven.apache.org/install.html) version 3.x.
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<!-- IGNORE_LINKS -->
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- [Docker Desktop](https://www.docker.com/products/docker-desktop)
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<!-- END_IGNORE -->
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@ -522,10 +553,16 @@ Clone the [sample provided in the Quickstarts repo](https://github.com/dapr/quic
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git clone https://github.com/dapr/quickstarts.git
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```
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In a new terminal window, navigate to the `order-processor` directory:
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Navigate to the `order-processor` directory:
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```bash
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need
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cd workflows/java/sdk/order-processor
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```
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Install the dependencies:
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```bash
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mvn clean install
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```
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### Step 3: Run the order processor app
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@ -533,7 +570,7 @@ need
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In the terminal, start the order processor app alongside a Dapr sidecar:
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```bash
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need
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dapr run --app-id WorkflowConsoleApp --resources-path ../../../components/ --dapr-grpc-port 50001 -- java -jar target/OrderProcessingService-0.0.1-SNAPSHOT.jar io.dapr.quickstarts.workflows.WorkflowConsoleApp
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```
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This starts the `order-processor` app with unique workflow ID and runs the workflow activities.
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@ -541,29 +578,64 @@ This starts the `order-processor` app with unique workflow ID and runs the workf
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Expected output:
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```
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need
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== APP == *** Welcome to the Dapr Workflow console app sample!
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== APP == *** Using this app, you can place orders that start workflows.
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== APP == Start workflow runtime
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== APP == Sep 20, 2023 3:23:05 PM com.microsoft.durabletask.DurableTaskGrpcWorker startAndBlock
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== APP == INFO: Durable Task worker is connecting to sidecar at 127.0.0.1:50001.
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== APP == ==========Begin the purchase of item:==========
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== APP == Starting order workflow, purchasing 10 of cars
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== APP == scheduled new workflow instance of OrderProcessingWorkflow with instance ID: edceba90-9c45-4be8-ad40-60d16e060797
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== APP == [Thread-0] INFO io.dapr.workflows.WorkflowContext - Starting Workflow: io.dapr.quickstarts.workflows.OrderProcessingWorkflow
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== APP == [Thread-0] INFO io.dapr.workflows.WorkflowContext - Instance ID(order ID): edceba90-9c45-4be8-ad40-60d16e060797
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== APP == [Thread-0] INFO io.dapr.workflows.WorkflowContext - Current Orchestration Time: 2023-09-20T19:23:09.755Z
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== APP == [Thread-0] INFO io.dapr.workflows.WorkflowContext - Received Order: OrderPayload [itemName=cars, totalCost=150000, quantity=10]
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.NotifyActivity - Received Order: OrderPayload [itemName=cars, totalCost=150000, quantity=10]
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== APP == workflow instance edceba90-9c45-4be8-ad40-60d16e060797 started
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.ReserveInventoryActivity - Reserving inventory for order 'edceba90-9c45-4be8-ad40-60d16e060797' of 10 cars
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.ReserveInventoryActivity - There are 100 cars available for purchase
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.ReserveInventoryActivity - Reserved inventory for order 'edceba90-9c45-4be8-ad40-60d16e060797' of 10 cars
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.RequestApprovalActivity - Requesting approval for order: OrderPayload [itemName=cars, totalCost=150000, quantity=10]
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.RequestApprovalActivity - Approved requesting approval for order: OrderPayload [itemName=cars, totalCost=150000, quantity=10]
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.ProcessPaymentActivity - Processing payment: edceba90-9c45-4be8-ad40-60d16e060797 for 10 cars at $150000
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.ProcessPaymentActivity - Payment for request ID 'edceba90-9c45-4be8-ad40-60d16e060797' processed successfully
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.UpdateInventoryActivity - Updating inventory for order 'edceba90-9c45-4be8-ad40-60d16e060797' of 10 cars
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.UpdateInventoryActivity - Updated inventory for order 'edceba90-9c45-4be8-ad40-60d16e060797': there are now 90 cars left in stock
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== APP == [Thread-0] INFO io.dapr.quickstarts.workflows.activities.NotifyActivity - Order completed! : edceba90-9c45-4be8-ad40-60d16e060797
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== APP == workflow instance edceba90-9c45-4be8-ad40-60d16e060797 completed, out is: {"processed":true}
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```
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### (Optional) Step 4: View in Zipkin
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If you have Zipkin configured for Dapr locally on your machine, you can view the workflow trace spans in the Zipkin web UI (typically at `http://localhost:9411/zipkin/`).
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If you have Zipkin configured for Dapr locally on your machine, you can
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Running `dapr init` launches the [openzipkin/zipkin](https://hub.docker.com/r/openzipkin/zipkin/) Docker container. If the container has stopped running, launch the Zipkin Docker container with the following command:
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```
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docker run -d -p 9411:9411 openzipkin/zipkin
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```
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View the workflow trace spans in the Zipkin web UI (typically at `http://localhost:9411/zipkin/`).
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<img src="/images/workflow-trace-spans-zipkin.png" width=800 style="padding-bottom:15px;">
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### What happened?
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When you ran `need`:
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When you ran `dapr run`:
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1. A unique order ID for the workflow is generated (in the above example, `need`) and the workflow is scheduled.
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1. The `need` workflow activity sends a notification saying an order for 10 cars has been received.
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1. The `need` workflow activity checks the inventory data, determines if you can supply the ordered item, and responds with the number of cars in stock.
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1. Your workflow starts and notifies you of its status.
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1. The `need` workflow activity begins processing payment for order `need` and confirms if successful.
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1. The `need` workflow activity updates the inventory with the current available cars after the order has been processed.
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1. The `need` workflow activity sends a notification saying that order `need` has completed.
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1. A unique order ID for the workflow is generated (in the above example, `edceba90-9c45-4be8-ad40-60d16e060797`) and the workflow is scheduled.
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1. The `NotifyActivity` workflow activity sends a notification saying an order for 10 cars has been received.
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1. The `ReserveInventoryActivity` workflow activity checks the inventory data, determines if you can supply the ordered item, and responds with the number of cars in stock.
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1. Once approved, your workflow starts and notifies you of its status.
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1. The `ProcessPaymentActivity` workflow activity begins processing payment for order `edceba90-9c45-4be8-ad40-60d16e060797` and confirms if successful.
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1. The `UpdateInventoryActivity` workflow activity updates the inventory with the current available cars after the order has been processed.
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1. The `NotifyActivity` workflow activity sends a notification saying that order `edceba90-9c45-4be8-ad40-60d16e060797` has completed.
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1. The workflow terminates as completed.
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#### `order-processor/... need`
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#### `order-processor/WorkflowConsoleApp.java`
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In the application's program file:
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- The unique workflow order ID is generated
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@ -572,33 +644,226 @@ In the application's program file:
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- The workflow and the workflow activities it invokes are registered
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```java
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need
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package io.dapr.quickstarts.workflows;
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import io.dapr.client.DaprClient;
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import io.dapr.client.DaprClientBuilder;
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import io.dapr.workflows.client.DaprWorkflowClient;
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public class WorkflowConsoleApp {
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private static final String STATE_STORE_NAME = "statestore-actors";
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// ...
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public static void main(String[] args) throws Exception {
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System.out.println("*** Welcome to the Dapr Workflow console app sample!");
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System.out.println("*** Using this app, you can place orders that start workflows.");
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// Wait for the sidecar to become available
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Thread.sleep(5 * 1000);
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// Register the OrderProcessingWorkflow and its activities with the builder.
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WorkflowRuntimeBuilder builder = new WorkflowRuntimeBuilder().registerWorkflow(OrderProcessingWorkflow.class);
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builder.registerActivity(NotifyActivity.class);
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builder.registerActivity(ProcessPaymentActivity.class);
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builder.registerActivity(RequestApprovalActivity.class);
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builder.registerActivity(ReserveInventoryActivity.class);
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builder.registerActivity(UpdateInventoryActivity.class);
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// Build the workflow runtime
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try (WorkflowRuntime runtime = builder.build()) {
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System.out.println("Start workflow runtime");
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runtime.start(false);
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}
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InventoryItem inventory = prepareInventoryAndOrder();
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DaprWorkflowClient workflowClient = new DaprWorkflowClient();
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try (workflowClient) {
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executeWorkflow(workflowClient, inventory);
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}
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}
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// Start the workflow runtime, pulling and executing tasks
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private static void executeWorkflow(DaprWorkflowClient workflowClient, InventoryItem inventory) {
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System.out.println("==========Begin the purchase of item:==========");
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String itemName = inventory.getName();
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int orderQuantity = inventory.getQuantity();
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int totalcost = orderQuantity * inventory.getPerItemCost();
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OrderPayload order = new OrderPayload();
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order.setItemName(itemName);
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order.setQuantity(orderQuantity);
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order.setTotalCost(totalcost);
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System.out.println("Starting order workflow, purchasing " + orderQuantity + " of " + itemName);
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String instanceId = workflowClient.scheduleNewWorkflow(OrderProcessingWorkflow.class, order);
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System.out.printf("scheduled new workflow instance of OrderProcessingWorkflow with instance ID: %s%n",
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instanceId);
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// Check workflow instance start status
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try {
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workflowClient.waitForInstanceStart(instanceId, Duration.ofSeconds(10), false);
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System.out.printf("workflow instance %s started%n", instanceId);
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} catch (TimeoutException e) {
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System.out.printf("workflow instance %s did not start within 10 seconds%n", instanceId);
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return;
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}
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// Check workflow instance complete status
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try {
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WorkflowInstanceStatus workflowStatus = workflowClient.waitForInstanceCompletion(instanceId,
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Duration.ofSeconds(30),
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true);
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if (workflowStatus != null) {
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System.out.printf("workflow instance %s completed, out is: %s %n", instanceId,
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workflowStatus.getSerializedOutput());
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} else {
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System.out.printf("workflow instance %s not found%n", instanceId);
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}
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} catch (TimeoutException e) {
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System.out.printf("workflow instance %s did not complete within 30 seconds%n", instanceId);
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}
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}
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private static InventoryItem prepareInventoryAndOrder() {
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// prepare 100 cars in inventory
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InventoryItem inventory = new InventoryItem();
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inventory.setName("cars");
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inventory.setPerItemCost(15000);
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inventory.setQuantity(100);
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DaprClient daprClient = new DaprClientBuilder().build();
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restockInventory(daprClient, inventory);
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// prepare order for 10 cars
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InventoryItem order = new InventoryItem();
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order.setName("cars");
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order.setPerItemCost(15000);
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order.setQuantity(10);
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return order;
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}
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private static void restockInventory(DaprClient daprClient, InventoryItem inventory) {
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String key = inventory.getName();
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daprClient.saveState(STATE_STORE_NAME, key, inventory).block();
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}
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}
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```
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#### `order-processor/... need`
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#### `OrderProcessingWorkflow.java`
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In `need`, the workflow is defined as a class with all of its associated tasks (determined by workflow activities).
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In `OrderProcessingWorkflow.java`, the workflow is defined as a class with all of its associated tasks (determined by workflow activities).
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```java
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need
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package io.dapr.quickstarts.workflows;
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import io.dapr.workflows.Workflow;
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public class OrderProcessingWorkflow extends Workflow {
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@Override
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public WorkflowStub create() {
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return ctx -> {
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Logger logger = ctx.getLogger();
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String orderId = ctx.getInstanceId();
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logger.info("Starting Workflow: " + ctx.getName());
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logger.info("Instance ID(order ID): " + orderId);
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logger.info("Current Orchestration Time: " + ctx.getCurrentInstant());
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OrderPayload order = ctx.getInput(OrderPayload.class);
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logger.info("Received Order: " + order.toString());
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OrderResult orderResult = new OrderResult();
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orderResult.setProcessed(false);
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// Notify the user that an order has come through
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Notification notification = new Notification();
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notification.setMessage("Received Order: " + order.toString());
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ctx.callActivity(NotifyActivity.class.getName(), notification).await();
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// Determine if there is enough of the item available for purchase by checking
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// the inventory
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InventoryRequest inventoryRequest = new InventoryRequest();
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inventoryRequest.setRequestId(orderId);
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inventoryRequest.setItemName(order.getItemName());
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inventoryRequest.setQuantity(order.getQuantity());
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InventoryResult inventoryResult = ctx.callActivity(ReserveInventoryActivity.class.getName(),
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inventoryRequest, InventoryResult.class).await();
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// If there is insufficient inventory, fail and let the user know
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if (!inventoryResult.isSuccess()) {
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notification.setMessage("Insufficient inventory for order : " + order.getItemName());
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ctx.callActivity(NotifyActivity.class.getName(), notification).await();
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ctx.complete(orderResult);
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return;
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}
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// Require orders over a certain threshold to be approved
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if (order.getTotalCost() > 5000) {
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ApprovalResult approvalResult = ctx.callActivity(RequestApprovalActivity.class.getName(),
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order, ApprovalResult.class).await();
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if (approvalResult != ApprovalResult.Approved) {
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notification.setMessage("Order " + order.getItemName() + " was not approved.");
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ctx.callActivity(NotifyActivity.class.getName(), notification).await();
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ctx.complete(orderResult);
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return;
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}
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}
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// There is enough inventory available so the user can purchase the item(s).
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// Process their payment
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PaymentRequest paymentRequest = new PaymentRequest();
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paymentRequest.setRequestId(orderId);
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paymentRequest.setItemBeingPurchased(order.getItemName());
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paymentRequest.setQuantity(order.getQuantity());
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paymentRequest.setAmount(order.getTotalCost());
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boolean isOK = ctx.callActivity(ProcessPaymentActivity.class.getName(),
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paymentRequest, boolean.class).await();
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if (!isOK) {
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notification.setMessage("Payment failed for order : " + orderId);
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ctx.callActivity(NotifyActivity.class.getName(), notification).await();
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ctx.complete(orderResult);
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return;
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}
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inventoryResult = ctx.callActivity(UpdateInventoryActivity.class.getName(),
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inventoryRequest, InventoryResult.class).await();
|
||||
if (!inventoryResult.isSuccess()) {
|
||||
// If there is an error updating the inventory, refund the user
|
||||
// paymentRequest.setAmount(-1 * paymentRequest.getAmount());
|
||||
// ctx.callActivity(ProcessPaymentActivity.class.getName(),
|
||||
// paymentRequest).await();
|
||||
|
||||
// Let users know their payment processing failed
|
||||
notification.setMessage("Order failed to update inventory! : " + orderId);
|
||||
ctx.callActivity(NotifyActivity.class.getName(), notification).await();
|
||||
ctx.complete(orderResult);
|
||||
return;
|
||||
}
|
||||
|
||||
// Let user know their order was processed
|
||||
notification.setMessage("Order completed! : " + orderId);
|
||||
ctx.callActivity(NotifyActivity.class.getName(), notification).await();
|
||||
|
||||
// Complete the workflow with order result is processed
|
||||
orderResult.setProcessed(true);
|
||||
ctx.complete(orderResult);
|
||||
};
|
||||
}
|
||||
|
||||
}
|
||||
```
|
||||
|
||||
#### `order-processor/... need` directory
|
||||
#### `activities` directory
|
||||
|
||||
The `Activities` directory holds the four workflow activities used by the workflow, defined in the following files:
|
||||
- `need`
|
||||
- [`NotifyActivity.java`](https://github.com/dapr/quickstarts/tree/master/workflows/java/sdk/order-processor/src/main/java/io/dapr/quickstarts/workflows/activities/NotifyActivity.java)
|
||||
- [`RequestApprovalActivity`](https://github.com/dapr/quickstarts/tree/master/workflows/java/sdk/order-processor/src/main/java/io/dapr/quickstarts/workflows/activities/RequestApprovalActivity.java)
|
||||
- [`ReserveInventoryActivity`](https://github.com/dapr/quickstarts/tree/master/workflows/java/sdk/order-processor/src/main/java/io/dapr/quickstarts/workflows/activities/ReserveInventoryActivity.java)
|
||||
- [`ProcessPaymentActivity`](https://github.com/dapr/quickstarts/tree/master/workflows/java/sdk/order-processor/src/main/java/io/dapr/quickstarts/workflows/activities/ProcessPaymentActivity.java)
|
||||
- [`UpdateInventoryActivity`](https://github.com/dapr/quickstarts/tree/master/workflows/java/sdk/order-processor/src/main/java/io/dapr/quickstarts/workflows/activities/UpdateInventoryActivity.java)
|
||||
|
||||
{{% /codetab %}}
|
||||
|
||||
{{< /tabs >}}
|
||||
|
||||
## Watch the demo
|
||||
|
||||
Watch [this video to walk through the Dapr Workflow .NET demo](https://youtu.be/BxiKpEmchgQ?t=2564):
|
||||
|
||||
<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/BxiKpEmchgQ?start=2564" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
|
||||
|
||||
|
||||
## Tell us what you think!
|
||||
We're continuously working to improve our Quickstart examples and value your feedback. Did you find this Quickstart helpful? Do you have suggestions for improvement?
|
||||
|
||||
|
|
@ -610,4 +875,4 @@ Join the discussion in our [discord channel](https://discord.com/channels/778680
|
|||
- Walk through a more in-depth [.NET SDK example workflow](https://github.com/dapr/dotnet-sdk/tree/master/examples/Workflow)
|
||||
- Learn more about [Workflow as a Dapr building block]({{< ref workflow-overview >}})
|
||||
|
||||
{{< button text="Explore Dapr tutorials >>" page="getting-started/tutorials/_index.md" >}}
|
||||
{{< button text="Explore Dapr tutorials >>" page="getting-started/tutorials/_index.md" >}}
|
||||
Loading…
Reference in New Issue