Register TracerBridge in TracerInstaller instead of DDTracer init

dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/TracerInstaller.java

@@ -1,7 +1,7 @@
 package datadog.trace.agent.tooling;
 
 import datadog.opentracing.DDTracer;
-import io.opentracing.Tracer;
+import datadog.trace.context.TracerBridge;
 import io.opentracing.util.GlobalTracer;
 import lombok.extern.slf4j.Slf4j;
 
@@ -10,11 +10,12 @@ public class TracerInstaller {
   /** Register a global tracer if no global tracer is already registered. */
   public static synchronized void installGlobalTracer() {
     if (!GlobalTracer.isRegistered()) {
-      final Tracer resolved = new DDTracer();
+      final DDTracer tracer = new DDTracer();
       try {
-        GlobalTracer.register(resolved);
+        GlobalTracer.register(tracer);
+        TracerBridge.registerIfAbsent(tracer);
       } catch (final RuntimeException re) {
-        log.warn("Failed to register tracer '" + resolved + "'", re);
+        log.warn("Failed to register tracer '" + tracer + "'", re);
       }
     } else {
       log.debug("GlobalTracer already registered.");

dd-java-agent/testing/src/main/java/datadog/trace/agent/test/AgentTestRunner.java

@@ -9,6 +9,7 @@ import datadog.trace.agent.tooling.AgentInstaller;
 import datadog.trace.agent.tooling.Instrumenter;
 import datadog.trace.common.writer.ListWriter;
 import datadog.trace.common.writer.Writer;
+import datadog.trace.context.TracerBridge;
 import io.opentracing.Tracer;
 import java.lang.instrument.ClassFileTransformer;
 import java.lang.instrument.Instrumentation;
@@ -84,6 +85,7 @@ public abstract class AgentTestRunner extends Specification {
         };
     TEST_TRACER = new DDTracer(TEST_WRITER);
     TestUtils.registerOrReplaceGlobalTracer((Tracer) TEST_TRACER);
+    TracerBridge.registerIfAbsent((DDTracer) TEST_TRACER);
   }
 
   protected static Tracer getTestTracer() {

dd-trace-ot/src/main/java/datadog/opentracing/DDTracer.java

@@ -162,8 +162,6 @@ public class DDTracer implements io.opentracing.Tracer, Closeable, TracerBridge.
       addDecorator(decorator);
     }
 
-    TracerBridge.registerIfAbsent(this);
-
     log.info("New instance: {}", this);
   }
 

dd-trace-ot/src/test/groovy/datadog/opentracing/TraceInterceptorTest.groovy

@@ -147,6 +147,7 @@ class TraceInterceptorTest extends Specification {
 
   def "register interceptor through bridge" () {
     setup:
+    TracerBridge.registerIfAbsent(tracer)
     def interceptor = new TraceInterceptor() {
       @Override
       Collection<? extends MutableSpan> onTraceComplete(Collection<? extends MutableSpan> trace) {
@@ -161,5 +162,6 @@ class TraceInterceptorTest extends Specification {
 
     expect:
     TracerBridge.addTraceInterceptor(interceptor)
+    tracer.interceptors.contains(interceptor)
   }
 }