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GrpcDirectServerStreamingCallableTest.java
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GrpcDirectServerStreamingCallableTest.java
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/*
* Copyright 2017 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.google.api.gax.grpc;
import static com.google.api.gax.grpc.testing.FakeServiceGrpc.METHOD_SERVER_STREAMING_RECOGNIZE;
import com.google.api.core.SettableApiFuture;
import com.google.api.gax.grpc.testing.FakeServiceImpl;
import com.google.api.gax.grpc.testing.InProcessServer;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.ClientContext;
import com.google.api.gax.rpc.ResponseObserver;
import com.google.api.gax.rpc.ServerStream;
import com.google.api.gax.rpc.ServerStreamingCallSettings;
import com.google.api.gax.rpc.ServerStreamingCallable;
import com.google.api.gax.rpc.StateCheckingResponseObserver;
import com.google.api.gax.rpc.StatusCode;
import com.google.api.gax.rpc.StreamController;
import com.google.api.gax.rpc.testing.FakeCallContext;
import com.google.common.collect.Lists;
import com.google.common.truth.Truth;
import com.google.type.Color;
import com.google.type.Money;
import io.grpc.CallOptions;
import io.grpc.ManagedChannel;
import io.grpc.StatusRuntimeException;
import io.grpc.inprocess.InProcessChannelBuilder;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.CancellationException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class GrpcDirectServerStreamingCallableTest {
private static final Color DEFAULT_REQUEST = Color.newBuilder().setRed(0.5f).build();
private static final Color ASYNC_REQUEST = DEFAULT_REQUEST.toBuilder().setGreen(1000).build();
private static final Color ERROR_REQUEST = Color.newBuilder().setRed(-1).build();
private static final Money DEFAULT_RESPONSE =
Money.newBuilder().setCurrencyCode("USD").setUnits(127).build();
private InProcessServer<FakeServiceImpl> inprocessServer;
private ManagedChannel channel;
private ClientContext clientContext;
private ServerStreamingCallSettings<Color, Money> streamingCallSettings;
private ServerStreamingCallable<Color, Money> streamingCallable;
@Before
public void setUp() throws InstantiationException, IllegalAccessException, IOException {
String serverName = "fakeservice";
FakeServiceImpl serviceImpl = new FakeServiceImpl();
inprocessServer = new InProcessServer<>(serviceImpl, serverName);
inprocessServer.start();
channel = InProcessChannelBuilder.forName(serverName).directExecutor().usePlaintext().build();
clientContext =
ClientContext.newBuilder()
.setTransportChannel(GrpcTransportChannel.create(channel))
.setDefaultCallContext(GrpcCallContext.of(channel, CallOptions.DEFAULT))
.build();
streamingCallSettings = ServerStreamingCallSettings.<Color, Money>newBuilder().build();
streamingCallable =
GrpcCallableFactory.createServerStreamingCallable(
GrpcCallSettings.create(METHOD_SERVER_STREAMING_RECOGNIZE),
streamingCallSettings,
clientContext);
}
@After
public void tearDown() {
channel.shutdown();
inprocessServer.stop();
}
@Test
public void testBadContext() {
streamingCallable =
GrpcCallableFactory.createServerStreamingCallable(
GrpcCallSettings.create(METHOD_SERVER_STREAMING_RECOGNIZE),
streamingCallSettings,
clientContext
.toBuilder()
.setDefaultCallContext(FakeCallContext.createDefault())
.build());
CountDownLatch latch = new CountDownLatch(1);
MoneyObserver observer = new MoneyObserver(true, latch);
try {
streamingCallable.call(DEFAULT_REQUEST, observer);
Assert.fail("Callable should have thrown an exception");
} catch (IllegalArgumentException expected) {
Truth.assertThat(expected)
.hasMessageThat()
.contains("context must be an instance of GrpcCallContext");
}
}
@Test
public void testServerStreamingStart() throws Exception {
CountDownLatch latch = new CountDownLatch(1);
MoneyObserver moneyObserver = new MoneyObserver(true, latch);
streamingCallable.call(DEFAULT_REQUEST, moneyObserver);
Truth.assertThat(moneyObserver.controller).isNotNull();
}
@Test
public void testServerStreaming() throws Exception {
CountDownLatch latch = new CountDownLatch(2);
MoneyObserver moneyObserver = new MoneyObserver(true, latch);
streamingCallable.call(DEFAULT_REQUEST, moneyObserver);
latch.await(20, TimeUnit.SECONDS);
Truth.assertThat(moneyObserver.error).isNull();
Truth.assertThat(moneyObserver.response).isEqualTo(DEFAULT_RESPONSE);
}
@Test
public void testManualFlowControl() throws Exception {
CountDownLatch latch = new CountDownLatch(2);
MoneyObserver moneyObserver = new MoneyObserver(false, latch);
streamingCallable.call(DEFAULT_REQUEST, moneyObserver);
latch.await(500, TimeUnit.MILLISECONDS);
Truth.assertWithMessage("Received response before requesting it")
.that(moneyObserver.response)
.isNull();
moneyObserver.controller.request(1);
latch.await(500, TimeUnit.MILLISECONDS);
Truth.assertThat(moneyObserver.response).isEqualTo(DEFAULT_RESPONSE);
Truth.assertThat(moneyObserver.completed).isTrue();
}
@Test
public void testCancelClientCall() throws Exception {
CountDownLatch latch = new CountDownLatch(1);
MoneyObserver moneyObserver = new MoneyObserver(false, latch);
streamingCallable.call(ASYNC_REQUEST, moneyObserver);
moneyObserver.controller.cancel();
moneyObserver.controller.request(1);
latch.await(500, TimeUnit.MILLISECONDS);
Truth.assertThat(moneyObserver.error).isInstanceOf(CancellationException.class);
Truth.assertThat(moneyObserver.error).hasMessageThat().isEqualTo("User cancelled stream");
}
@Test
public void testOnResponseError() throws Throwable {
CountDownLatch latch = new CountDownLatch(1);
MoneyObserver moneyObserver = new MoneyObserver(true, latch);
streamingCallable.call(ERROR_REQUEST, moneyObserver);
latch.await(500, TimeUnit.MILLISECONDS);
Truth.assertThat(moneyObserver.error).isInstanceOf(ApiException.class);
Truth.assertThat(((ApiException) moneyObserver.error).getStatusCode().getCode())
.isEqualTo(StatusCode.Code.INVALID_ARGUMENT);
Truth.assertThat(moneyObserver.error)
.hasMessageThat()
.isEqualTo("io.grpc.StatusRuntimeException: INVALID_ARGUMENT: red must be positive");
}
@Test
public void testObserverErrorCancelsCall() throws Throwable {
final RuntimeException expectedCause = new RuntimeException("some error");
final SettableApiFuture<Throwable> actualErrorF = SettableApiFuture.create();
ResponseObserver<Money> moneyObserver =
new StateCheckingResponseObserver<Money>() {
@Override
protected void onStartImpl(StreamController controller) {}
@Override
protected void onResponseImpl(Money response) {
throw expectedCause;
}
@Override
protected void onErrorImpl(Throwable t) {
actualErrorF.set(t);
}
@Override
protected void onCompleteImpl() {
actualErrorF.set(null);
}
};
streamingCallable.call(DEFAULT_REQUEST, moneyObserver);
Throwable actualError = actualErrorF.get(500, TimeUnit.MILLISECONDS);
Truth.assertThat(actualError).isInstanceOf(ApiException.class);
Truth.assertThat(((ApiException) actualError).getStatusCode().getCode())
.isEqualTo(StatusCode.Code.CANCELLED);
// grpc is responsible for the immediate cancellation
Truth.assertThat(actualError.getCause()).isInstanceOf(StatusRuntimeException.class);
// and the client error is cause for grpc to cancel it
Truth.assertThat(actualError.getCause().getCause()).isSameInstanceAs(expectedCause);
}
@Test
public void testBlockingServerStreaming() throws Exception {
Color request = Color.newBuilder().setRed(0.5f).build();
ServerStream<Money> response = streamingCallable.call(request);
List<Money> responseData = Lists.newArrayList(response);
Money expected = Money.newBuilder().setCurrencyCode("USD").setUnits(127).build();
Truth.assertThat(responseData).containsExactly(expected);
}
static class MoneyObserver extends StateCheckingResponseObserver<Money> {
private final boolean autoFlowControl;
private final CountDownLatch latch;
volatile StreamController controller;
volatile Money response;
volatile Throwable error;
volatile boolean completed;
MoneyObserver(boolean autoFlowControl, CountDownLatch latch) {
this.autoFlowControl = autoFlowControl;
this.latch = latch;
}
@Override
protected void onStartImpl(StreamController controller) {
this.controller = controller;
if (!autoFlowControl) {
controller.disableAutoInboundFlowControl();
}
}
@Override
protected void onResponseImpl(Money value) {
response = value;
latch.countDown();
}
@Override
protected void onErrorImpl(Throwable t) {
error = t;
latch.countDown();
}
@Override
protected void onCompleteImpl() {
completed = true;
latch.countDown();
}
}
}