Merge branch 'master' into gpolaert/dropwizard

.circleci/config.yml

@@ -9,16 +9,16 @@ jobs:
       - checkout
 
       - restore_cache:
-          key: dd-trace-java-{{ checksum "build.gradle" }}-{{ checksum "dd-java-agent/build.gradle" }}-{{ checksum "dd-trace/build.gradle" }}
+          key: dd-trace-java-{{ checksum "dd-trace-java.gradle" }}-{{ checksum "dd-java-agent/dd-java-agent.gradle" }}-{{ checksum "dd-trace/dd-trace.gradle" }}
 
       - run:
           name: Run Tests
-          command: ./gradlew clean shadowJar check
+          command: ./gradlew clean shadowJar check --parallel
 
       - save_cache:
           paths:
             - ~/.gradle
-          key: dd-trace-java-{{ checksum "build.gradle" }}-{{ checksum "dd-java-agent/build.gradle" }}-{{ checksum "dd-trace/build.gradle" }}
+          key: dd-trace-java-{{ checksum "dd-trace-java.gradle" }}-{{ checksum "dd-java-agent/dd-java-agent.gradle" }}-{{ checksum "dd-trace/dd-trace.gradle" }}
 
       - store_test_results:
           path: dd-java-agent/build/test-results

dd-java-agent-ittests/dd-java-agent-ittests.gradle

@@ -1,3 +1,6 @@
+// Not adding jacoco here as it inexplicably breaks our tests.
+// apply from: "${rootDir}/gradle/jacoco.gradle"
+
 description = 'dd-java-agent-ittests'
 dependencies {
     testCompile project(':dd-java-agent')

dd-java-agent/dd-java-agent.gradle

@@ -4,6 +4,16 @@ plugins {
 
 description = 'dd-java-agent'
 
+apply from: "${rootDir}/gradle/jacoco.gradle"
+jacocoTestReport.dependsOn project(':dd-java-agent-ittests').test
+whitelistedInstructionClasses += whitelistedBranchClasses += [
+        "com.datadoghq.trace.agent.integration.*",
+        'com.datadoghq.trace.agent.AnnotationsTracingAgent',
+        'com.datadoghq.trace.agent.AgentTracerConfig',
+        'com.datadoghq.trace.agent.TraceAnnotationsManager',
+        'com.datadoghq.trace.agent.InstrumentationChecker'
+]
+
 dependencies {
     compile project(':dd-trace')
     compile project(':dd-trace-annotations')

dd-trace-annotations/dd-trace-annotations.gradle

@@ -1,3 +1,5 @@
+apply from: "${rootDir}/gradle/jacoco.gradle"
+
 description = 'dd-trace-annotations'
 dependencies {
     testCompile group: 'junit', name: 'junit', version: '3.8.1'

dd-trace/dd-trace.gradle

@@ -4,6 +4,15 @@ plugins {
 }
 
 description = 'dd-trace'
+
+apply from: "${rootDir}/gradle/jacoco.gradle"
+minimumBranchCoverage = 0.3
+minimumInstructionCoverage = 0.5
+whitelistedInstructionClasses += whitelistedBranchClasses += [
+        "com.datadoghq.trace.integration.*",
+        'com.datadoghq.trace.DDTags'
+]
+
 dependencies {
     compile group: 'io.opentracing', name: 'opentracing-api', version: '0.30.0'
     compile group: 'io.opentracing', name: 'opentracing-noop', version: '0.30.0'

dd-trace/src/main/java/com/datadoghq/trace/resolver/DDTracerResolver.java

@@ -41,19 +41,10 @@ public class DDTracerResolver extends TracerResolver {
 
 	@SuppressWarnings("static-access")
 	public static Tracer registerTracer() {
-
-		ServiceLoader<TracerResolver> RESOLVERS = ServiceLoader.load(TracerResolver.class);
-
-		Tracer tracer = null;
-		for (TracerResolver value : RESOLVERS) {
-			tracer = value.resolveTracer();
-			if (tracer != null) {
-				break;
-			}
-		}
+		Tracer tracer = TracerResolver.resolveTracer();
 
 		if (tracer == null) {
-			tracer = NoopTracerFactory.create();
+			return NoopTracerFactory.create();
 		}
 
 		GlobalTracer.register(tracer);

dd-trace/src/test/java/com/datadoghq/trace/resolver/TracerResolverTest.java

@@ -2,9 +2,14 @@ package com.datadoghq.trace.resolver;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+import java.lang.reflect.Field;
 import java.util.List;
 
+import io.opentracing.NoopTracerFactory;
+import io.opentracing.Tracer;
+import io.opentracing.contrib.tracerresolver.TracerResolver;
 import io.opentracing.tag.Tags;
+import io.opentracing.util.GlobalTracer;
 import org.junit.Test;
 
 import com.datadoghq.trace.DDTracer;
@@ -15,7 +20,7 @@ import com.datadoghq.trace.integration.URLAsResourceName;
 public class TracerResolverTest {
 
 	@Test
-	public void test() {
+	public void testResolve() {
 		DDTracerResolver tracerResolver = new DDTracerResolver();
 		DDTracer tracer = (DDTracer) tracerResolver.resolve();
 
@@ -39,4 +44,34 @@ public class TracerResolverTest {
 		
 	}
 
+	@Test
+	public void testResolveTracer() throws Exception {
+		Field tracerField = GlobalTracer.class.getDeclaredField("tracer");
+		tracerField.setAccessible(true);
+		tracerField.set(null, NoopTracerFactory.create());
+
+		assertThat(GlobalTracer.isRegistered()).isFalse();
+
+		Tracer tracer = TracerResolver.resolveTracer();
+
+		assertThat(GlobalTracer.isRegistered()).isFalse();
+		assertThat(tracer).isInstanceOf(DDTracer.class);
+	}
+
+	@Test
+	public void testRegisterTracer() throws Exception {
+		Field tracerField = GlobalTracer.class.getDeclaredField("tracer");
+		tracerField.setAccessible(true);
+		tracerField.set(null, NoopTracerFactory.create());
+
+		assertThat(GlobalTracer.isRegistered()).isFalse();
+
+		DDTracerResolver.registerTracer();
+
+		assertThat(GlobalTracer.isRegistered()).isTrue();
+		assertThat(tracerField.get(null)).isInstanceOf(DDTracer.class);
+
+		tracerField.set(null, NoopTracerFactory.create());
+	}
+
 }

gradle/jacoco.gradle

@@ -0,0 +1,43 @@
+apply plugin: "jacoco"
+
+jacocoTestReport {
+    dependsOn test
+    reports {
+        xml.enabled true
+        csv.enabled false
+        html.destination file("${buildDir}/reports/jacoco/")
+    }
+}
+
+project.ext.whitelistedBranchClasses = []
+project.ext.whitelistedInstructionClasses = []
+
+project.ext.minimumBranchCoverage = 0.6
+project.ext.minimumInstructionCoverage = 0.6
+
+afterEvaluate {
+    jacocoTestCoverageVerification {
+        violationRules {
+            rule {
+                element = 'CLASS'
+                excludes = project.whitelistedBranchClasses
+                limit {
+                    counter = 'BRANCH'
+                    minimum = project.minimumBranchCoverage
+                }
+            }
+
+            rule {
+                element = 'CLASS'
+                excludes = project.whitelistedInstructionClasses
+                limit {
+                    counter = 'INSTRUCTION'
+                    minimum = project.minimumInstructionCoverage
+                }
+            }
+        }
+    }
+
+    jacocoTestCoverageVerification.dependsOn jacocoTestReport
+    check.dependsOn jacocoTestCoverageVerification
+}

settings.gradle

@@ -1,4 +1,5 @@
 rootProject.name = 'dd-trace-java'
+
 include ':dd-trace'
 include ':dd-java-agent'
 include ':dd-java-agent-ittests'
@@ -8,11 +9,11 @@ include ':dd-trace-examples:spring-boot-jdbc'
 include ':dd-trace-examples'
 include ':dd-trace-annotations'
 
-project(':dd-trace').projectDir = "$rootDir/dd-trace" as File
-project(':dd-java-agent').projectDir = "$rootDir/dd-java-agent" as File
-project(':dd-java-agent-ittests').projectDir = "$rootDir/dd-java-agent-ittests" as File
-project(':dd-trace-examples:async-tracing').projectDir = "$rootDir/dd-trace-examples/async-tracing" as File
-project(':dd-trace-examples:dropwizard-mongo-client').projectDir = "$rootDir/dd-trace-examples/dropwizard-mongo-client" as File
-project(':dd-trace-examples:spring-boot-jdbc').projectDir = "$rootDir/dd-trace-examples/spring-boot-jdbc" as File
-project(':dd-trace-examples').projectDir = "$rootDir/dd-trace-examples" as File
-project(':dd-trace-annotations').projectDir = "$rootDir/dd-trace-annotations" as File
+def setBuildFile(project) {
+    project.buildFileName = "${project.name}.gradle"
+    project.children.each {
+        setBuildFile(it)
+    }
+}
+
+setBuildFile(rootProject)