support override java agent jar. (#244)

CHANGELOG.md

@@ -43,3 +43,5 @@ significant modifications will be credited to OpenTelemetry Authors.
 ([#225](https://github.com/open-telemetry/opentelemetry-demo/pull/225))
 * Add metrics endpoint in adservice to send metrics from java agent
 ([#237](https://github.com/open-telemetry/opentelemetry-demo/pull/237))
+* Support override java agent jar
+([#244](https://github.com/open-telemetry/opentelemetry-demo/pull/244))

src/adservice/Dockerfile

@@ -30,6 +30,7 @@ WORKDIR /usr/src/app/
 
 COPY --from=builder /usr/src/app/ ./
 COPY ./src/adservice/agent/opentelemetry-javaagent.jar /app/
+ENV JAVA_TOOL_OPTIONS=-javaagent:/app/opentelemetry-javaagent.jar
 
 EXPOSE ${AD_SERVICE_PORT}
 ENTRYPOINT [ "./build/install/hipstershop/bin/AdService" ]

src/adservice/build.gradle

@@ -99,17 +99,13 @@ task adService(type: CreateStartScripts) {
     applicationName = 'AdService'
     outputDir = new File(project.buildDir, 'tmp')
     classpath = startScripts.classpath
-    defaultJvmOpts =
-        ["-javaagent:/app/opentelemetry-javaagent.jar"]
 }
 
 task adServiceClient(type: CreateStartScripts) {
     mainClass.set('hipstershop.AdServiceClient')
     applicationName = 'AdServiceClient'
     outputDir = new File(project.buildDir, 'tmp')
     classpath = startScripts.classpath
-    defaultJvmOpts =
-        ["-javaagent:/app/opentelemetry-javaagent.jar"]
 }
 
 applicationDistribution.into('bin') {