cronet: pass TransportTracer instead of null. (#3869)

AbstractStream now requires TransportTracer to be non-null.

cronet/src/main/java/io/grpc/cronet/CronetChannelBuilder.java

@@ -31,6 +31,7 @@ import io.grpc.internal.ConnectionClientTransport;
 import io.grpc.internal.GrpcUtil;
 import io.grpc.internal.ProxyParameters;
 import io.grpc.internal.SharedResourceHolder;
+import io.grpc.internal.TransportTracer;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.util.concurrent.Executor;
@@ -130,7 +131,7 @@ public final class CronetChannelBuilder extends
   @Override
   protected final ClientTransportFactory buildTransportFactory() {
     return new CronetTransportFactory(streamFactory, MoreExecutors.directExecutor(),
-        maxMessageSize, alwaysUsePut);
+        maxMessageSize, alwaysUsePut, transportTracerFactory.create());
   }
 
   @Override
@@ -147,16 +148,19 @@ public final class CronetChannelBuilder extends
     private final int maxMessageSize;
     private final boolean alwaysUsePut;
     private final StreamBuilderFactory streamFactory;
+    private final TransportTracer transportTracer;
 
     private CronetTransportFactory(
         StreamBuilderFactory streamFactory,
         Executor executor,
         int maxMessageSize,
-        boolean alwaysUsePut) {
+        boolean alwaysUsePut,
+        TransportTracer transportTracer) {
       this.maxMessageSize = maxMessageSize;
       this.alwaysUsePut = alwaysUsePut;
       this.streamFactory = streamFactory;
       this.executor = Preconditions.checkNotNull(executor, "executor");
+      this.transportTracer = Preconditions.checkNotNull(transportTracer, "transportTracer");
     }
 
     @Override
@@ -164,7 +168,7 @@ public final class CronetChannelBuilder extends
         @Nullable String userAgent, @Nullable ProxyParameters proxy) {
       InetSocketAddress inetSocketAddr = (InetSocketAddress) addr;
       return new CronetClientTransport(streamFactory, inetSocketAddr, authority, userAgent,
-          executor, maxMessageSize, alwaysUsePut);
+          executor, maxMessageSize, alwaysUsePut, transportTracer);
     }
 
     @Override

cronet/src/main/java/io/grpc/cronet/CronetClientStream.java

@@ -38,6 +38,7 @@ import io.grpc.internal.Http2ClientStreamTransportState;
 import io.grpc.internal.ReadableBuffers;
 import io.grpc.internal.StatsTraceContext;
 import io.grpc.internal.TransportFrameUtil;
+import io.grpc.internal.TransportTracer;
 import io.grpc.internal.WritableBuffer;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
@@ -90,8 +91,11 @@ class CronetClientStream extends AbstractClientStream {
       boolean alwaysUsePut,
       MethodDescriptor<?, ?> method,
       StatsTraceContext statsTraceCtx,
-      CallOptions callOptions) {
+      CallOptions callOptions,
-    super(new CronetWritableBufferAllocator(), statsTraceCtx, null, headers, method.isSafe());
+      TransportTracer transportTracer) {
+    super(
+        new CronetWritableBufferAllocator(), statsTraceCtx, transportTracer, headers,
+        method.isSafe());
     this.url = Preconditions.checkNotNull(url, "url");
     this.userAgent = Preconditions.checkNotNull(userAgent, "userAgent");
     this.executor = Preconditions.checkNotNull(executor, "executor");
@@ -103,7 +107,7 @@ class CronetClientStream extends AbstractClientStream {
     this.delayRequestHeader = (method.getType() == MethodDescriptor.MethodType.UNARY);
     this.annotation = callOptions.getOption(CronetCallOptions.CRONET_ANNOTATION_KEY);
     this.annotations = callOptions.getOption(CronetCallOptions.CRONET_ANNOTATIONS_KEY);
-    this.state = new TransportState(maxMessageSize, statsTraceCtx, lock);
+    this.state = new TransportState(maxMessageSize, statsTraceCtx, lock, transportTracer);
   }
 
   @Override
@@ -218,8 +222,10 @@ class CronetClientStream extends AbstractClientStream {
     @GuardedBy("lock")
     private boolean readClosed;
 
-    public TransportState(int maxMessageSize, StatsTraceContext statsTraceCtx, Object lock) {
+    public TransportState(
-      super(maxMessageSize, statsTraceCtx, null);
+        int maxMessageSize, StatsTraceContext statsTraceCtx, Object lock,
+        TransportTracer transportTracer) {
+      super(maxMessageSize, statsTraceCtx, transportTracer);
       this.lock = Preconditions.checkNotNull(lock, "lock");
     }
 

cronet/src/main/java/io/grpc/cronet/CronetClientTransport.java

@@ -31,6 +31,7 @@ import io.grpc.InternalTransportStats;
 import io.grpc.internal.ConnectionClientTransport;
 import io.grpc.internal.GrpcUtil;
 import io.grpc.internal.StatsTraceContext;
+import io.grpc.internal.TransportTracer;
 import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -56,6 +57,7 @@ class CronetClientTransport implements ConnectionClientTransport, InternalWithLo
   private final Executor executor;
   private final int maxMessageSize;
   private final boolean alwaysUsePut;
+  private final TransportTracer transportTracer;
   // Indicates the transport is in go-away state: no new streams will be processed,
   // but existing streams may continue.
   @GuardedBy("lock")
@@ -80,7 +82,8 @@ class CronetClientTransport implements ConnectionClientTransport, InternalWithLo
       @Nullable String userAgent,
       Executor executor,
       int maxMessageSize,
-      boolean alwaysUsePut) {
+      boolean alwaysUsePut,
+      TransportTracer transportTracer) {
     this.address = Preconditions.checkNotNull(address, "address");
     this.authority = authority;
     this.userAgent = GrpcUtil.getGrpcUserAgent("cronet", userAgent);
@@ -88,6 +91,7 @@ class CronetClientTransport implements ConnectionClientTransport, InternalWithLo
     this.alwaysUsePut = alwaysUsePut;
     this.executor = Preconditions.checkNotNull(executor, "executor");
     this.streamFactory = Preconditions.checkNotNull(streamFactory, "streamFactory");
+    this.transportTracer = Preconditions.checkNotNull(transportTracer, "transportTracer");
   }
 
   @Override
@@ -111,7 +115,7 @@ class CronetClientTransport implements ConnectionClientTransport, InternalWithLo
     class StartCallback implements Runnable {
       final CronetClientStream clientStream = new CronetClientStream(
           url, userAgent, executor, headers, CronetClientTransport.this, this, lock, maxMessageSize,
-          alwaysUsePut, method, statsTraceCtx, callOptions);
+          alwaysUsePut, method, statsTraceCtx, callOptions, transportTracer);
 
       @Override
       public void run() {

cronet/src/test/java/io/grpc/cronet/CronetClientStreamTest.java

@@ -38,6 +38,7 @@ import io.grpc.internal.ClientStreamListener;
 import io.grpc.internal.GrpcUtil;
 import io.grpc.internal.StatsTraceContext;
 import io.grpc.internal.StreamListener.MessageProducer;
+import io.grpc.internal.TransportTracer;
 import io.grpc.internal.WritableBuffer;
 import io.grpc.testing.TestMethodDescriptors;
 import java.io.ByteArrayInputStream;
@@ -72,6 +73,7 @@ public final class CronetClientStreamTest {
   @Mock private ClientStreamListener clientListener;
   @Mock private ExperimentalBidirectionalStream.Builder builder;
   private final Object lock = new Object();
+  private final TransportTracer transportTracer = TransportTracer.getDefaultFactory().create();
   CronetClientStream clientStream;
 
   private MethodDescriptor.Marshaller<Void> marshaller = TestMethodDescriptors.voidMarshaller();
@@ -115,7 +117,8 @@ public final class CronetClientStreamTest {
             false /* alwaysUsePut */,
             method,
             StatsTraceContext.NOOP,
-            CallOptions.DEFAULT);
+            CallOptions.DEFAULT,
+            transportTracer);
     callback.setStream(clientStream);
     when(factory.newBidirectionalStreamBuilder(
             any(String.class), any(BidirectionalStream.Callback.class), any(Executor.class)))
@@ -573,7 +576,8 @@ public final class CronetClientStreamTest {
             false /* alwaysUsePut */,
             method,
             StatsTraceContext.NOOP,
-            CallOptions.DEFAULT.withOption(CronetCallOptions.CRONET_ANNOTATION_KEY, annotation));
+            CallOptions.DEFAULT.withOption(CronetCallOptions.CRONET_ANNOTATION_KEY, annotation),
+            transportTracer);
     callback.setStream(stream);
     when(factory.newBidirectionalStreamBuilder(
             any(String.class), any(BidirectionalStream.Callback.class), any(Executor.class)))
@@ -605,7 +609,8 @@ public final class CronetClientStreamTest {
             false /* alwaysUsePut */,
             method,
             StatsTraceContext.NOOP,
-            callOptions);
+            callOptions,
+            transportTracer);
     callback.setStream(stream);
     when(factory.newBidirectionalStreamBuilder(
             any(String.class), any(BidirectionalStream.Callback.class), any(Executor.class)))
@@ -642,7 +647,8 @@ public final class CronetClientStreamTest {
             false /* alwaysUsePut */,
             getMethod,
             StatsTraceContext.NOOP,
-            CallOptions.DEFAULT);
+            CallOptions.DEFAULT,
+            transportTracer);
     callback.setStream(stream);
     ExperimentalBidirectionalStream.Builder getBuilder =
         mock(ExperimentalBidirectionalStream.Builder.class);
@@ -696,7 +702,8 @@ public final class CronetClientStreamTest {
             false /* alwaysUsePut */,
             idempotentMethod,
             StatsTraceContext.NOOP,
-            CallOptions.DEFAULT);
+            CallOptions.DEFAULT,
+            transportTracer);
     callback.setStream(stream);
     ExperimentalBidirectionalStream.Builder builder =
         mock(ExperimentalBidirectionalStream.Builder.class);
@@ -725,7 +732,8 @@ public final class CronetClientStreamTest {
             true /* alwaysUsePut */,
             method,
             StatsTraceContext.NOOP,
-            CallOptions.DEFAULT);
+            CallOptions.DEFAULT,
+            transportTracer);
     callback.setStream(stream);
     ExperimentalBidirectionalStream.Builder builder =
         mock(ExperimentalBidirectionalStream.Builder.class);
@@ -762,7 +770,8 @@ public final class CronetClientStreamTest {
             false /* alwaysUsePut */,
             method,
             StatsTraceContext.NOOP,
-            CallOptions.DEFAULT);
+            CallOptions.DEFAULT,
+            transportTracer);
     callback.setStream(stream);
     ExperimentalBidirectionalStream.Builder builder =
         mock(ExperimentalBidirectionalStream.Builder.class);

cronet/src/test/java/io/grpc/cronet/CronetClientTransportTest.java

@@ -30,6 +30,7 @@ import io.grpc.Status;
 import io.grpc.cronet.CronetChannelBuilder.StreamBuilderFactory;
 import io.grpc.internal.ClientStreamListener;
 import io.grpc.internal.ManagedClientTransport;
+import io.grpc.internal.TransportTracer;
 import io.grpc.testing.TestMethodDescriptors;
 import java.net.InetSocketAddress;
 import java.util.concurrent.Executor;
@@ -64,7 +65,8 @@ public final class CronetClientTransportTest {
             null,
             executor,
             5000,
-            false);
+            false,
+            TransportTracer.getDefaultFactory().create());
     Runnable callback = transport.start(clientTransportListener);
     assertTrue(callback != null);
     callback.run();