Added Http4SpanDecorator to apache-camel (#4650)

* Added Http4SpanDecorator to apache-camel

* Fixed CR

* After spotless

instrumentation/apache-camel-2.20/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachecamel/decorators/DecoratorRegistry.java

@@ -31,7 +31,8 @@ public class DecoratorRegistry {
     result.put("disruptor", new InternalSpanDecorator());
     result.put("disruptor-vm", new InternalSpanDecorator());
     result.put("elasticsearch", new DbSpanDecorator("elasticsearch", "elasticsearch"));
-    result.put("http4", new HttpSpanDecorator());
+    result.put("http4", new Http4SpanDecorator());
+    result.put("https4", new Https4SpanDecorator());
     result.put("http", new HttpSpanDecorator());
     result.put("ironmq", new MessagingSpanDecorator("ironmq"));
     result.put("jdbc", new DbSpanDecorator("jdbc", DbSystemValues.OTHER_SQL));

instrumentation/apache-camel-2.20/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachecamel/decorators/Http4SpanDecorator.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.apachecamel.decorators;
+
+import javax.annotation.Nullable;
+import org.apache.camel.Endpoint;
+import org.apache.camel.Exchange;
+
+class Http4SpanDecorator extends HttpSpanDecorator {
+  @Override
+  protected String getProtocol() {
+    return "http4";
+  }
+
+  @Nullable
+  @Override
+  protected String getHttpUrl(Exchange exchange, Endpoint endpoint) {
+    String url = super.getHttpUrl(exchange, endpoint);
+    if (url != null) {
+      return url.replace(getProtocol(), getProtocol().substring(0, getProtocol().length() - 1));
+    }
+    return null;
+  }
+}

instrumentation/apache-camel-2.20/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachecamel/decorators/HttpSpanDecorator.java

@@ -39,6 +39,10 @@ class HttpSpanDecorator extends BaseSpanDecorator {
   private static final String POST_METHOD = "POST";
   private static final String GET_METHOD = "GET";
 
+  protected String getProtocol() {
+    return "http";
+  }
+
   protected static String getHttpMethod(Exchange exchange, Endpoint endpoint) {
     // 1. Use method provided in header.
     Object method = exchange.getIn().getHeader(Exchange.HTTP_METHOD);
@@ -131,7 +135,7 @@ class HttpSpanDecorator extends BaseSpanDecorator {
         return (String) uri;
       } else {
         // Try to obtain from endpoint
-        int index = endpoint.getEndpointUri().lastIndexOf("http:");
+        int index = endpoint.getEndpointUri().lastIndexOf(getProtocol() + ":");
         if (index != -1) {
           return endpoint.getEndpointUri().substring(index);
         }

instrumentation/apache-camel-2.20/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachecamel/decorators/Https4SpanDecorator.java

@@ -0,0 +1,13 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.apachecamel.decorators;
+
+class Https4SpanDecorator extends Http4SpanDecorator {
+  @Override
+  protected String getProtocol() {
+    return "https4";
+  }
+}