forked from grpc/grpc-java
/
ServerCallsTest.java
668 lines (627 loc) · 26.4 KB
/
ServerCallsTest.java
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/*
* Copyright 2016 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.stub;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import io.grpc.CallOptions;
import io.grpc.ClientCall;
import io.grpc.ManagedChannel;
import io.grpc.Metadata;
import io.grpc.MethodDescriptor;
import io.grpc.ServerCall;
import io.grpc.ServerCallHandler;
import io.grpc.ServerServiceDefinition;
import io.grpc.ServiceDescriptor;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;
import io.grpc.inprocess.InProcessChannelBuilder;
import io.grpc.inprocess.InProcessServerBuilder;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link ServerCalls}.
*/
@RunWith(JUnit4.class)
public class ServerCallsTest {
static final MethodDescriptor<Integer, Integer> STREAMING_METHOD =
MethodDescriptor.<Integer, Integer>newBuilder()
.setType(MethodDescriptor.MethodType.BIDI_STREAMING)
.setFullMethodName("some/bidi_streaming")
.setRequestMarshaller(new IntegerMarshaller())
.setResponseMarshaller(new IntegerMarshaller())
.build();
static final MethodDescriptor<Integer, Integer> SERVER_STREAMING_METHOD =
STREAMING_METHOD.toBuilder()
.setType(MethodDescriptor.MethodType.SERVER_STREAMING)
.setFullMethodName("some/client_streaming")
.build();
static final MethodDescriptor<Integer, Integer> UNARY_METHOD =
STREAMING_METHOD.toBuilder()
.setType(MethodDescriptor.MethodType.UNARY)
.setFullMethodName("some/unary")
.build();
private final ServerCallRecorder serverCall = new ServerCallRecorder(UNARY_METHOD);
@Test
public void runtimeStreamObserverIsServerCallStreamObserver() throws Exception {
final AtomicBoolean invokeCalled = new AtomicBoolean();
final AtomicBoolean onCancelCalled = new AtomicBoolean();
final AtomicBoolean onReadyCalled = new AtomicBoolean();
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver =
new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
assertTrue(responseObserver instanceof ServerCallStreamObserver);
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
callObserver.set(serverCallObserver);
serverCallObserver.setOnCancelHandler(new Runnable() {
@Override
public void run() {
onCancelCalled.set(true);
}
});
serverCallObserver.setOnReadyHandler(new Runnable() {
@Override
public void run() {
onReadyCalled.set(true);
}
});
invokeCalled.set(true);
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
serverCall.isReady = true;
serverCall.isCancelled = false;
assertTrue(callObserver.get().isReady());
assertFalse(callObserver.get().isCancelled());
callListener.onReady();
callListener.onMessage(1);
callListener.onCancel();
assertTrue(invokeCalled.get());
assertTrue(onReadyCalled.get());
assertTrue(onCancelCalled.get());
serverCall.isReady = false;
serverCall.isCancelled = true;
assertFalse(callObserver.get().isReady());
assertTrue(callObserver.get().isCancelled());
// Is called twice, once to permit the first message and once again after the first message
// has been processed (auto flow control)
assertThat(serverCall.requestCalls).containsExactly(1, 1).inOrder();
}
@Test
public void noCancellationExceptionIfOnCancelHandlerSet() throws Exception {
final AtomicBoolean onCancelCalled = new AtomicBoolean();
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver =
new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
callObserver.set(serverCallObserver);
serverCallObserver.setOnCancelHandler(new Runnable() {
@Override
public void run() {
onCancelCalled.set(true);
}
});
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onReady();
callListener.onCancel();
assertTrue(onCancelCalled.get());
serverCall.isCancelled = true;
assertTrue(callObserver.get().isCancelled());
callObserver.get().onNext(null);
callObserver.get().onCompleted();
}
@Test
public void expectCancellationExceptionIfOnCancelHandlerNotSet() throws Exception {
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver =
new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
callObserver.set(serverCallObserver);
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onReady();
callListener.onCancel();
serverCall.isCancelled = true;
assertTrue(callObserver.get().isCancelled());
try {
callObserver.get().onNext(null);
fail("Expected cancellation exception when onCallHandler not set");
} catch (StatusRuntimeException expected) {
// Expected
}
// No exception
callObserver.get().onCompleted();
}
@Test
public void onCloseHandlerCalledIfSetInStreamingClientCall() throws Exception {
final AtomicBoolean onCloseHandlerCalled = new AtomicBoolean();
ServerCallHandler<Integer, Integer> callHandler = ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.setOnCloseHandler(new Runnable() {
@Override
public void run() {
onCloseHandlerCalled.set(true);
}
});
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener = callHandler.startCall(serverCall, new Metadata());
callListener.onComplete();
assertTrue(onCloseHandlerCalled.get());
}
@Test
public void onCloseHandlerCalledIfSetInUnaryClientCall() throws Exception {
final AtomicBoolean onCloseHandlerCalled = new AtomicBoolean();
ServerCallHandler<Integer, Integer> callHandler = ServerCalls.asyncServerStreamingCall(
new ServerCalls.ServerStreamingMethod<Integer, Integer>() {
@Override
public void invoke(Integer request, StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.setOnCloseHandler(new Runnable() {
@Override
public void run() {
onCloseHandlerCalled.set(true);
}
});
}
});
ServerCall.Listener<Integer> callListener = callHandler.startCall(serverCall, new Metadata());
callListener.onMessage(0);
callListener.onHalfClose();
callListener.onComplete();
assertTrue(onCloseHandlerCalled.get());
}
@Test
public void cannotSetOnCancelHandlerAfterServiceInvocation() throws Exception {
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver =
new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
callObserver.set((ServerCallStreamObserver<Integer>) responseObserver);
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onMessage(1);
try {
callObserver.get().setOnCancelHandler(new Runnable() {
@Override
public void run() {
}
});
fail("Cannot set onCancel handler after service invocation");
} catch (IllegalStateException expected) {
// Expected
}
}
@Test
public void cannotSetOnReadyHandlerAfterServiceInvocation() throws Exception {
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver =
new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
callObserver.set((ServerCallStreamObserver<Integer>) responseObserver);
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onMessage(1);
try {
callObserver.get().setOnReadyHandler(new Runnable() {
@Override
public void run() {
}
});
fail("Cannot set onReady after service invocation");
} catch (IllegalStateException expected) {
// Expected
}
}
@Test
public void cannotSetOnCloseHandlerAfterServiceInvocation() throws Exception {
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver = new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler = ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
callObserver.set((ServerCallStreamObserver<Integer>) responseObserver);
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener = callHandler.startCall(serverCall, new Metadata());
callListener.onMessage(1);
try {
callObserver.get().setOnCloseHandler(new Runnable() {
@Override
public void run() {
}
});
fail("Cannot set onReady after service invocation");
} catch (IllegalStateException expected) {
// Expected
}
}
@Test
public void cannotDisableAutoRequestAfterServiceInvocation() throws Exception {
final AtomicReference<ServerCallStreamObserver<Integer>> callObserver =
new AtomicReference<>();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
callObserver.set((ServerCallStreamObserver<Integer>) responseObserver);
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onMessage(1);
try {
callObserver.get().disableAutoRequest();
fail("Cannot set onCancel handler after service invocation");
} catch (IllegalStateException expected) {
// Expected
}
}
@Test
public void disablingInboundAutoFlowControlSuppressesRequestsForMoreMessages() throws Exception {
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.disableAutoRequest();
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onReady();
// Transport should not call this if nothing has been requested but forcing it here
// to verify that message delivery does not trigger a call to request(1).
callListener.onMessage(1);
// Should never be called
assertThat(serverCall.requestCalls).isEmpty();
}
@Test
public void disablingInboundAutoRequestSuppressesRequestsForMoreMessages() throws Exception {
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.disableAutoRequest();
return new ServerCalls.NoopStreamObserver<>();
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
callListener.onReady();
// Transport should not call this if nothing has been requested but forcing it here
// to verify that message delivery does not trigger a call to request(1).
callListener.onMessage(1);
// Should never be called
assertThat(serverCall.requestCalls).isEmpty();
}
@Test
public void disablingInboundAutoRequestForUnaryHasNoEffect() throws Exception {
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncUnaryCall(
new ServerCalls.UnaryMethod<Integer, Integer>() {
@Override
public void invoke(Integer req, StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.disableAutoRequest();
}
});
callHandler.startCall(serverCall, new Metadata());
// Auto inbound flow-control always requests 2 messages for unary to detect a violation
// of the unary semantic.
assertThat(serverCall.requestCalls).containsExactly(2);
}
@Test
public void onReadyHandlerCalledForUnaryRequest() throws Exception {
final AtomicInteger onReadyCalled = new AtomicInteger();
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncServerStreamingCall(
new ServerCalls.ServerStreamingMethod<Integer, Integer>() {
@Override
public void invoke(Integer req, StreamObserver<Integer> responseObserver) {
ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.setOnReadyHandler(new Runnable() {
@Override
public void run() {
onReadyCalled.incrementAndGet();
}
});
}
});
ServerCall.Listener<Integer> callListener =
callHandler.startCall(serverCall, new Metadata());
serverCall.isReady = true;
serverCall.isCancelled = false;
callListener.onReady();
// On ready is not called until the unary request message is delivered
assertEquals(0, onReadyCalled.get());
// delivering the message doesn't trigger onReady listener either
callListener.onMessage(1);
assertEquals(0, onReadyCalled.get());
// half-closing triggers the unary request delivery and onReady
callListener.onHalfClose();
assertEquals(1, onReadyCalled.get());
// Next on ready event from the transport triggers listener
callListener.onReady();
assertEquals(2, onReadyCalled.get());
}
@Test
public void clientSendsOne_errorMissingRequest_unary() {
ServerCallRecorder serverCall = new ServerCallRecorder(UNARY_METHOD);
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncUnaryCall(
new ServerCalls.UnaryMethod<Integer, Integer>() {
@Override
public void invoke(Integer req, StreamObserver<Integer> responseObserver) {
fail("should not be reached");
}
});
ServerCall.Listener<Integer> listener = callHandler.startCall(serverCall, new Metadata());
listener.onHalfClose();
assertThat(serverCall.responses).isEmpty();
assertEquals(Status.Code.INTERNAL, serverCall.status.getCode());
assertEquals(ServerCalls.MISSING_REQUEST, serverCall.status.getDescription());
}
@Test
public void clientSendsOne_errorMissingRequest_serverStreaming() {
ServerCallRecorder serverCall = new ServerCallRecorder(SERVER_STREAMING_METHOD);
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncServerStreamingCall(
new ServerCalls.ServerStreamingMethod<Integer, Integer>() {
@Override
public void invoke(Integer req, StreamObserver<Integer> responseObserver) {
fail("should not be reached");
}
});
ServerCall.Listener<Integer> listener = callHandler.startCall(serverCall, new Metadata());
listener.onHalfClose();
assertThat(serverCall.responses).isEmpty();
assertEquals(Status.Code.INTERNAL, serverCall.status.getCode());
assertEquals(ServerCalls.MISSING_REQUEST, serverCall.status.getDescription());
}
@Test
public void clientSendsOne_errorTooManyRequests_unary() {
ServerCallRecorder serverCall = new ServerCallRecorder(UNARY_METHOD);
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncUnaryCall(
new ServerCalls.UnaryMethod<Integer, Integer>() {
@Override
public void invoke(Integer req, StreamObserver<Integer> responseObserver) {
fail("should not be reached");
}
});
ServerCall.Listener<Integer> listener = callHandler.startCall(serverCall, new Metadata());
listener.onMessage(1);
listener.onMessage(1);
assertThat(serverCall.responses).isEmpty();
assertEquals(Status.Code.INTERNAL, serverCall.status.getCode());
assertEquals(ServerCalls.TOO_MANY_REQUESTS, serverCall.status.getDescription());
// ensure onHalfClose does not invoke
listener.onHalfClose();
}
@Test
public void clientSendsOne_errorTooManyRequests_serverStreaming() {
ServerCallRecorder serverCall = new ServerCallRecorder(SERVER_STREAMING_METHOD);
ServerCallHandler<Integer, Integer> callHandler =
ServerCalls.asyncServerStreamingCall(
new ServerCalls.ServerStreamingMethod<Integer, Integer>() {
@Override
public void invoke(Integer req, StreamObserver<Integer> responseObserver) {
fail("should not be reached");
}
});
ServerCall.Listener<Integer> listener = callHandler.startCall(serverCall, new Metadata());
listener.onMessage(1);
listener.onMessage(1);
assertThat(serverCall.responses).isEmpty();
assertEquals(Status.Code.INTERNAL, serverCall.status.getCode());
assertEquals(ServerCalls.TOO_MANY_REQUESTS, serverCall.status.getDescription());
// ensure onHalfClose does not invoke
listener.onHalfClose();
}
@Test
public void inprocessTransportManualFlow() throws Exception {
final Semaphore semaphore = new Semaphore(1);
ServerServiceDefinition service = ServerServiceDefinition.builder(
new ServiceDescriptor("some", STREAMING_METHOD))
.addMethod(STREAMING_METHOD, ServerCalls.asyncBidiStreamingCall(
new ServerCalls.BidiStreamingMethod<Integer, Integer>() {
int iteration;
@Override
public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
final ServerCallStreamObserver<Integer> serverCallObserver =
(ServerCallStreamObserver<Integer>) responseObserver;
serverCallObserver.setOnReadyHandler(new Runnable() {
@Override
public void run() {
while (serverCallObserver.isReady()) {
serverCallObserver.onNext(iteration);
}
iteration++;
semaphore.release();
}
});
return new ServerCalls.NoopStreamObserver<Integer>() {
@Override
public void onCompleted() {
serverCallObserver.onCompleted();
}
};
}
}))
.build();
long tag = System.nanoTime();
InProcessServerBuilder.forName("go-with-the-flow" + tag).addService(service).build().start();
ManagedChannel channel = InProcessChannelBuilder.forName("go-with-the-flow" + tag).build();
final ClientCall<Integer, Integer> clientCall = channel.newCall(STREAMING_METHOD,
CallOptions.DEFAULT);
final CountDownLatch latch = new CountDownLatch(1);
final int[] receivedMessages = new int[6];
clientCall.start(new ClientCall.Listener<Integer>() {
int index;
@Override
public void onMessage(Integer message) {
receivedMessages[index++] = message;
}
@Override
public void onClose(Status status, Metadata trailers) {
latch.countDown();
}
}, new Metadata());
semaphore.acquire();
clientCall.request(1);
semaphore.acquire();
clientCall.request(2);
semaphore.acquire();
clientCall.request(3);
clientCall.halfClose();
assertThat(latch.await(5, TimeUnit.SECONDS)).isTrue();
// Very that number of messages produced in each onReady handler call matches the number
// requested by the client.
assertArrayEquals(new int[]{0, 1, 1, 2, 2, 2}, receivedMessages);
}
public static class IntegerMarshaller implements MethodDescriptor.Marshaller<Integer> {
@Override
public InputStream stream(Integer value) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream(4);
DataOutputStream dos = new DataOutputStream(baos);
dos.writeInt(value);
return new ByteArrayInputStream(baos.toByteArray());
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
@Override
public Integer parse(InputStream stream) {
try {
DataInputStream dis = new DataInputStream(stream);
return dis.readInt();
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
}
private static class ServerCallRecorder extends ServerCall<Integer, Integer> {
private final MethodDescriptor<Integer, Integer> methodDescriptor;
private final List<Integer> requestCalls = new ArrayList<>();
private final List<Integer> responses = new ArrayList<>();
private Status status;
private boolean isCancelled;
private boolean isReady;
public ServerCallRecorder(MethodDescriptor<Integer, Integer> methodDescriptor) {
this.methodDescriptor = methodDescriptor;
}
@Override
public void request(int numMessages) {
requestCalls.add(numMessages);
}
@Override
public void sendHeaders(Metadata headers) {
}
@Override
public void sendMessage(Integer message) {
this.responses.add(message);
}
@Override
public void close(Status status, Metadata trailers) {
this.status = status;
}
@Override
public boolean isCancelled() {
return isCancelled;
}
@Override
public boolean isReady() {
return isReady;
}
@Override
public MethodDescriptor<Integer, Integer> getMethodDescriptor() {
return methodDescriptor;
}
}
}