Add traceProcessors option to OpenTelemetry extension

Fixes apache#6143

docs/modules/ROOT/pages/reference/extensions/opentelemetry.adoc

@@ -120,15 +120,15 @@ There is more information about CDI instrumentation in the https://quarkus.io/gu
 | Configuration property | Type | Default
 
 
-|icon:lock[title=Fixed at build time] [[quarkus.camel.opentelemetry.encoding]]`link:#quarkus.camel.opentelemetry.encoding[quarkus.camel.opentelemetry.encoding]`
+| [[quarkus.camel.opentelemetry.encoding]]`link:#quarkus.camel.opentelemetry.encoding[quarkus.camel.opentelemetry.encoding]`
 
 Sets whether header names need to be encoded. Can be useful in situations where OpenTelemetry propagators potentially set header name values in formats that are not compatible with the target system. E.g for JMS where the specification mandates header names are valid Java identifiers.
 | `boolean`
 | `false`
 
-|icon:lock[title=Fixed at build time] [[quarkus.camel.opentelemetry.exclude-patterns]]`link:#quarkus.camel.opentelemetry.exclude-patterns[quarkus.camel.opentelemetry.exclude-patterns]`
+| [[quarkus.camel.opentelemetry.exclude-patterns]]`link:#quarkus.camel.opentelemetry.exclude-patterns[quarkus.camel.opentelemetry.exclude-patterns]`
 
-Sets whether to disable tracing for endpoint URIs that match the given comma separated patterns. The pattern can take the following forms:
+Sets whether to disable tracing for endpoint URIs or Processor ids that match the given comma separated patterns. The pattern can take the following forms:
 
 
 
@@ -143,6 +143,12 @@ Sets whether to disable tracing for endpoint URIs that match the given comma sep
 3. A regular expression matching the endpoint URI. E.g platform-http:/prefix/.++*++
 | `string`
 | 
+
+| [[quarkus.camel.opentelemetry.trace-processors]]`link:#quarkus.camel.opentelemetry.trace-processors[quarkus.camel.opentelemetry.trace-processors]`
+
+Sets whether to create new OpenTelemetry spans for each Camel Processor. Use the excludePatterns property to filter out Processors.
+| `boolean`
+| `false`
 |===
 
 [.configuration-legend]

extensions/opentelemetry/deployment/src/test/java/org/apache/camel/quarkus/component/opentelemetry/deployment/OpenTelemetryEnabledTest.java

@@ -23,18 +23,25 @@
 import org.apache.camel.CamelContext;
 import org.apache.camel.opentelemetry.CamelQuarkusOpenTelemetryTracer;
 import org.apache.camel.opentelemetry.OpenTelemetryTracer;
+import org.apache.camel.opentelemetry.OpenTelemetryTracingStrategy;
 import org.jboss.shrinkwrap.api.ShrinkWrap;
 import org.jboss.shrinkwrap.api.spec.JavaArchive;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class OpenTelemetryEnabledTest {
 
+    private static final String EXCLUDE_PATTERNS = "platform-http:*,platform-http:/prefix/.*";
+
     @RegisterExtension
     static final QuarkusUnitTest CONFIG = new QuarkusUnitTest()
+            .overrideConfigKey("quarkus.camel.opentelemetry.encoding", "true")
+            .overrideConfigKey("quarkus.camel.opentelemetry.exclude-patterns", EXCLUDE_PATTERNS)
+            .overrideConfigKey("quarkus.camel.opentelemetry.trace-processors", "true")
             .setArchiveProducer(() -> ShrinkWrap.create(JavaArchive.class));
 
     @Inject
@@ -45,7 +52,10 @@ public void camelOpenTelemetryTracerRegistryBeanNotNull() {
         Set<OpenTelemetryTracer> tracers = context.getRegistry().findByType(OpenTelemetryTracer.class);
         assertEquals(1, tracers.size());
 
-        OpenTelemetryTracer factory = tracers.iterator().next();
-        assertTrue(factory instanceof CamelQuarkusOpenTelemetryTracer);
+        OpenTelemetryTracer tracer = tracers.iterator().next();
+        assertInstanceOf(CamelQuarkusOpenTelemetryTracer.class, tracer);
+        assertInstanceOf(OpenTelemetryTracingStrategy.class, tracer.getTracingStrategy());
+        assertTrue(tracer.isEncoding());
+        assertEquals(EXCLUDE_PATTERNS, tracer.getExcludePatterns());
     }
 }

extensions/opentelemetry/runtime/src/main/java/org/apache/camel/quarkus/component/opentelemetry/CamelOpenTelemetryConfig.java

@@ -22,7 +22,7 @@
 import io.quarkus.runtime.annotations.ConfigPhase;
 import io.quarkus.runtime.annotations.ConfigRoot;
 
-@ConfigRoot(name = "camel.opentelemetry", phase = ConfigPhase.BUILD_AND_RUN_TIME_FIXED)
+@ConfigRoot(name = "camel.opentelemetry", phase = ConfigPhase.RUN_TIME)
 public final class CamelOpenTelemetryConfig {
 
     /**
@@ -34,7 +34,7 @@ public final class CamelOpenTelemetryConfig {
     public boolean encoding;
 
     /**
-     * Sets whether to disable tracing for endpoint URIs that match the given
+     * Sets whether to disable tracing for endpoint URIs or Processor ids that match the given
      * comma separated patterns. The pattern can take the following
      * forms:
      * <p>
@@ -49,4 +49,11 @@ public final class CamelOpenTelemetryConfig {
      */
     @ConfigItem
     public Optional<String> excludePatterns;
+
+    /**
+     * Sets whether to create new OpenTelemetry spans for each Camel Processor. Use the excludePatterns
+     * property to filter out Processors.
+     */
+    @ConfigItem(defaultValue = "false")
+    public boolean traceProcessors;
 }

extensions/opentelemetry/runtime/src/main/java/org/apache/camel/quarkus/component/opentelemetry/OpenTelemetryTracerProducer.java

@@ -23,6 +23,7 @@
 import jakarta.inject.Singleton;
 import org.apache.camel.opentelemetry.CamelQuarkusOpenTelemetryTracer;
 import org.apache.camel.opentelemetry.OpenTelemetryTracer;
+import org.apache.camel.opentelemetry.OpenTelemetryTracingStrategy;
 
 @Singleton
 public class OpenTelemetryTracerProducer {
@@ -43,6 +44,13 @@ public OpenTelemetryTracer getOpenTelemetry() {
             if (config.excludePatterns.isPresent()) {
                 openTelemetryTracer.setExcludePatterns(config.excludePatterns.get());
             }
+
+            if (config.traceProcessors) {
+                OpenTelemetryTracingStrategy tracingStrategy = new OpenTelemetryTracingStrategy(openTelemetryTracer);
+                tracingStrategy.setPropagateContext(true);
+                openTelemetryTracer.setTracingStrategy(tracingStrategy);
+            }
+
             openTelemetryTracer.setEncoding(config.encoding);
         }
         return openTelemetryTracer;

integration-tests/opentelemetry/src/test/java/org/apache/camel/quarkus/component/opentelemetry/it/OpenTelemetryTest.java

@@ -27,6 +27,7 @@
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
+import static org.apache.camel.quarkus.component.opentelemetry.it.OpenTelemetryTestHelper.getSpans;
 import static org.awaitility.Awaitility.await;
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -86,8 +87,8 @@ public void testTracedCamelRouteInvokedFromJaxRsService() {
         List<Map<String, String>> spans = getSpans();
         assertEquals(3, spans.size());
         assertEquals(spans.get(0).get("parentId"), spans.get(1).get("spanId"));
-        assertEquals(spans.get(1).get("kind"), SpanKind.CLIENT.name());
-        assertEquals(spans.get(2).get("kind"), SpanKind.SERVER.name());
+        assertEquals(SpanKind.CLIENT.name(), spans.get(1).get("kind"));
+        assertEquals(SpanKind.SERVER.name(), spans.get(2).get("kind"));
     }
 
     @Test
@@ -104,8 +105,8 @@ public void testTracedBean() {
         assertEquals(4, spans.size());
         assertEquals(spans.get(0).get("parentId"), spans.get(1).get("parentId"));
         assertEquals(spans.get(1).get("parentId"), spans.get(2).get("spanId"));
-        assertEquals(spans.get(2).get("kind"), SpanKind.CLIENT.name());
-        assertEquals(spans.get(3).get("kind"), SpanKind.SERVER.name());
+        assertEquals(SpanKind.CLIENT.name(), spans.get(2).get("kind"));
+        assertEquals(SpanKind.SERVER.name(), spans.get(3).get("kind"));
     }
 
     @Test
@@ -141,15 +142,4 @@ public void testTracedJdbcQuery() {
         assertEquals(spans.get(5).get("parentId"), "0000000000000000");
         assertEquals(spans.get(5).get("code.function"), "jdbcQuery");
     }
-
-    private List<Map<String, String>> getSpans() {
-        return RestAssured.given()
-                .get("/opentelemetry/exporter/spans")
-                .then()
-                .statusCode(200)
-                .extract()
-                .body()
-                .jsonPath()
-                .get();
-    }
 }

integration-tests/opentelemetry/src/test/java/org/apache/camel/quarkus/component/opentelemetry/it/OpenTelemetryTestHelper.java

@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.camel.quarkus.component.opentelemetry.it;
+
+import java.util.List;
+import java.util.Map;
+
+import io.restassured.RestAssured;
+
+class OpenTelemetryTestHelper {
+    private OpenTelemetryTestHelper() {
+        // Utility class
+    }
+
+    static List<Map<String, String>> getSpans() {
+        return RestAssured.given()
+                .get("/opentelemetry/exporter/spans")
+                .then()
+                .statusCode(200)
+                .extract()
+                .body()
+                .jsonPath()
+                .get();
+    }
+}

integration-tests/opentelemetry/src/test/java/org/apache/camel/quarkus/component/opentelemetry/it/OpenTelemetryTraceProcessorsIT.java

@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.camel.quarkus.component.opentelemetry.it;
+
+import io.quarkus.test.junit.QuarkusIntegrationTest;
+
+@QuarkusIntegrationTest
+class OpenTelemetryTraceProcessorsIT extends OpenTelemetryTraceProcessorsTest {
+}

integration-tests/opentelemetry/src/test/java/org/apache/camel/quarkus/component/opentelemetry/it/OpenTelemetryTraceProcessorsTest.java

@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.camel.quarkus.component.opentelemetry.it;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import io.opentelemetry.api.trace.SpanKind;
+import io.quarkus.test.junit.QuarkusTest;
+import io.quarkus.test.junit.TestProfile;
+import io.restassured.RestAssured;
+import org.junit.jupiter.api.Test;
+
+import static org.apache.camel.quarkus.component.opentelemetry.it.OpenTelemetryTestHelper.getSpans;
+import static org.awaitility.Awaitility.await;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@TestProfile(TraceProcessorsTestProfile.class)
+@QuarkusTest
+class OpenTelemetryTraceProcessorsTest {
+    @Test
+    void traceProcessors() {
+        RestAssured.get("/opentelemetry/trace")
+                .then()
+                .statusCode(200)
+                .body(equalTo("Traced direct:start"));
+
+        // Verify the span hierarchy is JAX-RS Service -> Direct Endpoint -> SetBody
+        await().atMost(30, TimeUnit.SECONDS).pollDelay(50, TimeUnit.MILLISECONDS).until(() -> getSpans().size() == 4);
+        List<Map<String, String>> spans = getSpans();
+        assertEquals(4, spans.size());
+        assertEquals(SpanKind.INTERNAL.name(), spans.get(0).get("kind"));
+        assertEquals("camel-setBody", spans.get(0).get("component"));
+        assertEquals(spans.get(1).get("spanId"), spans.get(0).get("parentId"));
+        assertEquals(SpanKind.INTERNAL.name(), spans.get(1).get("kind"));
+        assertEquals(spans.get(2).get("spanId"), spans.get(1).get("parentId"));
+        assertEquals(SpanKind.CLIENT.name(), spans.get(2).get("kind"));
+        assertEquals(spans.get(3).get("spanId"), spans.get(2).get("parentId"));
+        assertEquals(SpanKind.SERVER.name(), spans.get(3).get("kind"));
+    }
+}

integration-tests/opentelemetry/src/test/java/org/apache/camel/quarkus/component/opentelemetry/it/TraceProcessorsTestProfile.java

@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.camel.quarkus.component.opentelemetry.it;
+
+import java.util.Map;
+
+import io.quarkus.test.junit.QuarkusTestProfile;
+
+public class TraceProcessorsTestProfile implements QuarkusTestProfile {
+    @Override
+    public Map<String, String> getConfigOverrides() {
+        return Map.of("quarkus.camel.opentelemetry.trace-processors", "true");
+    }
+}