[4.x] - MP Telemetry examples (#6813)

MP Telemetry Examples
---------

Signed-off-by: Dmitry Aleksandrov <dmitry.aleksandrov@oracle.com>
Co-authored-by: Romain Grecourt <romain.grecourt@oracle.com>

examples/microprofile/README.md

@@ -1,3 +1,64 @@
-# Helidon MP Examples
+# Helidon MicroProfile Telemetry Example
 
-This directory contains Helidon MP examples.
+This example implements demonstrates usage of MP Telemetry Tracing.
+
+## Build and run
+
+With JDK17+
+```bash
+mvn package
+java -jar greeting/target/helidon-examples-microprofile-telemetry-greeting.jar
+```
+
+Run Jaeger tracer. If you prefer to use Docker, run in terminal: 
+```bash
+docker run -d --name jaeger \
+  -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
+  -e COLLECTOR_OTLP_ENABLED=true \
+  -p 6831:6831/udp \
+  -p 6832:6832/udp \
+  -p 5778:5778 \
+  -p 16686:16686 \
+  -p 4317:4317 \
+  -p 4318:4318 \
+  -p 14250:14250 \
+  -p 14268:14268 \
+  -p 14269:14269 \
+  -p 9411:9411 \
+  jaegertracing/all-in-one:1.43
+```
+
+If you have Jaeger all-in-one installed, use this command:
+
+```bash
+jaeger-all-in-one --collector.zipkin.host-port=9411   --collector.otlp.enabled=true
+```
+
+Run the Secondary service:
+
+With JDK17+
+```bash
+mvn package
+java -jar secondary/target/helidon-examples-microprofile-telemetry-secondary.jar
+```
+
+## Exercise the application
+
+```
+curl -X GET http://localhost:8080/greet
+"Hello World!"
+
+curl -X GET http://localhost:8080/greet/span
+{"Span":"PropagatedSpan{ImmutableSpanContext{traceId=00000000000000000000000000000000, spanId=0000000000000000, traceFlags=00, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=false}}"}
+
+curl -X GET http://localhost:8080/greet/custom
+{
+  "Custom Span": "SdkSpan{traceId=bea7da56d1fe82400af8ec0a8adb370d, spanId=57647ead5dc32ae7, parentSpanContext=ImmutableSpanContext{traceId=bea7da56d1fe82400af8ec0a8adb370d, spanId=0ca670f1e3330ea5, traceFlags=01, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=true}, name=custom, kind=INTERNAL, attributes=AttributesMap{data={attribute=value}, capacity=128, totalAddedValues=1}, status=ImmutableStatusData{statusCode=UNSET, description=}, totalRecordedEvents=0, totalRecordedLinks=0, startEpochNanos=1683724682576003542, endEpochNanos=1683724682576006000}"
+}
+
+curl -X GET http://localhost:8080/greet/outbound   
+Secondary    
+
+```
+
+Proceed Jaeger UI http://localhost:16686. In the top-down menu select "greeting-service" and click "Find traces". Tracing information should become available.

examples/microprofile/pom.xml

@@ -49,5 +49,6 @@
         <module>bean-validation</module>
         <module>http-status-count-mp</module>
         <module>lra</module>
+        <module>telemetry</module>
     </modules>
 </project>

examples/microprofile/telemetry/README.md

@@ -0,0 +1,64 @@
+# Helidon MicroProfile Telemetry Example
+
+This example implements demonstrates usage of MP Telemetry Tracing.
+
+## Build and run
+
+With JDK17+
+```bash
+mvn package
+java -jar greeting/target/helidon-examples-microprofile-telemetry-greeting.jar
+```
+
+Run Jaeger tracer. If you prefer to use Docker, run in terminal:
+```bash
+docker run -d --name jaeger \
+  -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
+  -e COLLECTOR_OTLP_ENABLED=true \
+  -p 6831:6831/udp \
+  -p 6832:6832/udp \
+  -p 5778:5778 \
+  -p 16686:16686 \
+  -p 4317:4317 \
+  -p 4318:4318 \
+  -p 14250:14250 \
+  -p 14268:14268 \
+  -p 14269:14269 \
+  -p 9411:9411 \
+  jaegertracing/all-in-one:1.43
+```
+
+If you have Jaeger all-in-one installed, use this command:
+
+```bash
+jaeger-all-in-one --collector.zipkin.host-port=9411   --collector.otlp.enabled=true
+```
+
+Run the Secondary service:
+
+With JDK17+
+```bash
+mvn package
+java -jar secondary/target/helidon-examples-microprofile-telemetry-secondary.jar
+```
+
+## Exercise the application
+
+```
+curl -X GET http://localhost:8080/greet
+"Hello World!"
+
+curl -X GET http://localhost:8080/greet/span
+{"Span":"PropagatedSpan{ImmutableSpanContext{traceId=00000000000000000000000000000000, spanId=0000000000000000, traceFlags=00, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=false}}"}
+
+curl -X GET http://localhost:8080/greet/custom
+{
+  "Custom Span": "SdkSpan{traceId=bea7da56d1fe82400af8ec0a8adb370d, spanId=57647ead5dc32ae7, parentSpanContext=ImmutableSpanContext{traceId=bea7da56d1fe82400af8ec0a8adb370d, spanId=0ca670f1e3330ea5, traceFlags=01, traceState=ArrayBasedTraceState{entries=[]}, remote=false, valid=true}, name=custom, kind=INTERNAL, attributes=AttributesMap{data={attribute=value}, capacity=128, totalAddedValues=1}, status=ImmutableStatusData{statusCode=UNSET, description=}, totalRecordedEvents=0, totalRecordedLinks=0, startEpochNanos=1683724682576003542, endEpochNanos=1683724682576006000}"
+}
+
+curl -X GET http://localhost:8080/greet/outbound   
+Secondary    
+
+```
+
+Proceed Jaeger UI http://localhost:16686. In the top-down menu select "greeting-service" and click "Find traces". Tracing information should become available.

examples/microprofile/telemetry/greeting/pom.xml

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    Licensed 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.
+
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>io.helidon.applications</groupId>
+        <artifactId>helidon-mp</artifactId>
+        <version>4.0.0-SNAPSHOT</version>
+        <relativePath>../../../../applications/mp/pom.xml</relativePath>
+    </parent>
+    <groupId>io.helidon.examples.microprofile</groupId>
+    <artifactId>helidon-examples-microprofile-telemetry-greeting</artifactId>
+    <name>Microprofile Telemetry Greeting Example</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.helidon.microprofile.bundles</groupId>
+            <artifactId>helidon-microprofile</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.opentelemetry</groupId>
+            <artifactId>opentelemetry-exporter-jaeger</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.microprofile.telemetry</groupId>
+            <artifactId>helidon-microprofile-telemetry</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.smallrye</groupId>
+            <artifactId>jandex</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>copy-libs</id>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>io.smallrye</groupId>
+                <artifactId>jandex-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>make-index</id>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

examples/microprofile/telemetry/greeting/src/main/java/io/helidon/examples/microprofile/telemetry/GreetResource.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ * Licensed 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 io.helidon.examples.microprofile.telemetry;
+
+import java.util.Collections;
+
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.api.trace.SpanKind;
+import io.opentelemetry.api.trace.Tracer;
+import io.opentelemetry.instrumentation.annotations.WithSpan;
+import jakarta.inject.Inject;
+import jakarta.json.Json;
+import jakarta.json.JsonBuilderFactory;
+import jakarta.json.JsonObject;
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.client.WebTarget;
+import jakarta.ws.rs.core.MediaType;
+import org.glassfish.jersey.server.Uri;
+
+
+/**
+ * A simple JAX-RS resource to greet you. Examples:
+ *
+ * Get default greeting message:
+ * curl -X GET http://localhost:8080/greet
+ *
+ * Get Span information:
+ * curl -X GET http://localhost:8080/greet/span
+ *
+ *  Call secondary service:
+ *  curl -X GET http://localhost:8080/greet/outbound
+ */
+@Path("/greet")
+public class GreetResource {
+
+    private static final JsonBuilderFactory JSON = Json.createBuilderFactory(Collections.emptyMap());
+
+    private Span span;
+
+    private Tracer tracer;
+
+    @Uri("http://localhost:8081/secondary")
+    private WebTarget target;
+
+    @Inject
+    GreetResource(Span span, Tracer tracer) {
+        this.span = span;
+        this.tracer = tracer;
+    }
+
+    /**
+     * Return a worldly greeting message.
+     *
+     * @return {@link String}
+     */
+    @GET
+    @WithSpan("default")
+    public String getDefaultMessage() {
+        return "Hello World";
+    }
+
+    /**
+     *  Create an internal custom span and return its description.
+     * @return {@link JsonObject}
+     */
+    @GET
+    @Path("custom")
+    @Produces(MediaType.APPLICATION_JSON)
+    @WithSpan
+    public JsonObject useCustomSpan(){
+        Span span = tracer.spanBuilder("custom")
+                .setSpanKind(SpanKind.INTERNAL)
+                .setAttribute("attribute", "value")
+                .startSpan();
+        span.end();
+
+        return JSON.createObjectBuilder()
+                .add("Custom Span", span.toString())
+                .build();
+    }
+    /**
+     * Get Span info.
+     *
+     * @return {@link JsonObject}
+     */
+    @GET
+    @Path("span")
+    @Produces(MediaType.APPLICATION_JSON)
+    @WithSpan
+    public JsonObject getSpanInfo(){
+        return JSON.createObjectBuilder()
+                .add("Span", span.toString())
+                .build();
+    }
+
+    /**
+     * Call the secondary service running on port 8081.
+     *
+     * @return String from the secondary service.
+     */
+    @GET
+    @Path("/outbound")
+    @WithSpan("outbound")
+    public String outbound() {
+        return target.request().accept(MediaType.TEXT_PLAIN).get(String.class);
+    }
+
+}

examples/microprofile/telemetry/greeting/src/main/java/io/helidon/examples/microprofile/telemetry/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ * Licensed 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.
+ */
+
+/**
+ * MicroProfile Telemetry example.
+ */
+package io.helidon.examples.microprofile.telemetry;

examples/microprofile/telemetry/greeting/src/main/resources/META-INF/beans.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    Licensed 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.
+
+-->
+<beans xmlns="https://jakarta.ee/xml/ns/jakartaee"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee
+                           https://jakarta.ee/xml/ns/jakartaee/beans_3_0.xsd"
+       version="3.0"
+       bean-discovery-mode="annotated">
+</beans>