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/*
* Copyright 2017 The gRPC Authors
*
* 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.grpc.internal.testing;
import io.grpc.ClientStreamTracer;
import io.grpc.Status;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
/**
* A {@link ClientStreamTracer} suitable for testing.
*/
public class TestClientStreamTracer extends ClientStreamTracer implements TestStreamTracer {
private final TestBaseStreamTracer delegate = new TestBaseStreamTracer();
protected final CountDownLatch outboundHeadersLatch = new CountDownLatch(1);
protected final AtomicReference<Throwable> outboundHeadersCalled =
new AtomicReference<Throwable>();
protected final AtomicReference<Throwable> inboundHeadersCalled =
new AtomicReference<Throwable>();
@Override
public void await() throws InterruptedException {
delegate.await();
}
@Override
public boolean await(long timeout, TimeUnit timeUnit) throws InterruptedException {
return delegate.await(timeout, timeUnit);
}
/**
* Returns if {@link ClientStreamTracer#inboundHeaders} has been called.
*/
public boolean getInboundHeaders() {
return inboundHeadersCalled.get() != null;
}
/**
* Returns if {@link ClientStreamTracer#outboundHeaders} has been called.
*/
public boolean getOutboundHeaders() {
return outboundHeadersCalled.get() != null;
}
/**
* Allow tests to await the outbound header event, which depending on the test case may be
* necessary (e.g., if we test for a Netty client's outbound headers upon receiving the start of
* stream on the server side, the tracer won't know that headers were sent until a channel future
* executes).
*/
public boolean awaitOutboundHeaders(int timeout, TimeUnit unit) throws Exception {
return outboundHeadersLatch.await(timeout, unit);
}
@Override
public Status getStatus() {
return delegate.getStatus();
}
@Override
public long getInboundWireSize() {
return delegate.getInboundWireSize();
}
@Override
public long getInboundUncompressedSize() {
return delegate.getInboundUncompressedSize();
}
@Override
public long getOutboundWireSize() {
return delegate.getOutboundWireSize();
}
@Override
public long getOutboundUncompressedSize() {
return delegate.getOutboundUncompressedSize();
}
@Override
public void setFailDuplicateCallbacks(boolean fail) {
delegate.setFailDuplicateCallbacks(fail);
}
@Override
public String nextOutboundEvent() {
return delegate.nextOutboundEvent();
}
@Override
public String nextInboundEvent() {
return delegate.nextInboundEvent();
}
@Override
public void outboundWireSize(long bytes) {
delegate.outboundWireSize(bytes);
}
@Override
public void inboundWireSize(long bytes) {
delegate.inboundWireSize(bytes);
}
@Override
public void outboundUncompressedSize(long bytes) {
delegate.outboundUncompressedSize(bytes);
}
@Override
public void inboundUncompressedSize(long bytes) {
delegate.inboundUncompressedSize(bytes);
}
@Override
public void streamClosed(Status status) {
delegate.streamClosed(status);
}
@Override
public void inboundMessage(int seqNo) {
delegate.inboundMessage(seqNo);
}
@Override
public void outboundMessage(int seqNo) {
delegate.outboundMessage(seqNo);
}
@Override
public void outboundMessageSent(int seqNo, long optionalWireSize, long optionalUncompressedSize) {
delegate.outboundMessageSent(seqNo, optionalWireSize, optionalUncompressedSize);
}
@Override
public void inboundMessageRead(int seqNo, long optionalWireSize, long optionalUncompressedSize) {
delegate.inboundMessageRead(seqNo, optionalWireSize, optionalUncompressedSize);
}
@Override
public void outboundHeaders() {
if (!outboundHeadersCalled.compareAndSet(null, new Exception("first stack"))
&& delegate.failDuplicateCallbacks.get()) {
throw new AssertionError(
"outboundHeaders called more than once",
new Exception("second stack", outboundHeadersCalled.get()));
}
outboundHeadersLatch.countDown();
}
@Override
public void inboundHeaders() {
if (!inboundHeadersCalled.compareAndSet(null, new Exception("first stack"))
&& delegate.failDuplicateCallbacks.get()) {
throw new AssertionError(
"inboundHeaders called more than once",
new Exception("second stack", inboundHeadersCalled.get()));
}
}
}
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