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RetriableStreamTest.java
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RetriableStreamTest.java
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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;
import static com.google.common.truth.Truth.assertThat;
import static io.grpc.internal.ClientStreamListener.RpcProgress.DROPPED;
import static io.grpc.internal.ClientStreamListener.RpcProgress.MISCARRIED;
import static io.grpc.internal.ClientStreamListener.RpcProgress.PROCESSED;
import static io.grpc.internal.ClientStreamListener.RpcProgress.REFUSED;
import static io.grpc.internal.RetriableStream.GRPC_PREVIOUS_RPC_ATTEMPTS;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.mockito.AdditionalAnswers.delegatesTo;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.ArgumentMatchers.same;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoInteractions;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
import com.google.common.collect.ImmutableSet;
import com.google.common.util.concurrent.MoreExecutors;
import io.grpc.ClientStreamTracer;
import io.grpc.Codec;
import io.grpc.Compressor;
import io.grpc.DecompressorRegistry;
import io.grpc.Metadata;
import io.grpc.MethodDescriptor;
import io.grpc.MethodDescriptor.MethodType;
import io.grpc.Status;
import io.grpc.Status.Code;
import io.grpc.StringMarshaller;
import io.grpc.internal.ClientStreamListener.RpcProgress;
import io.grpc.internal.RetriableStream.ChannelBufferMeter;
import io.grpc.internal.RetriableStream.Throttle;
import io.grpc.internal.StreamListener.MessageProducer;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nullable;
import org.junit.After;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.ArgumentCaptor;
import org.mockito.InOrder;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/** Unit tests for {@link RetriableStream}. */
@RunWith(JUnit4.class)
public class RetriableStreamTest {
private static final String CANCELLED_BECAUSE_COMMITTED =
"Stream thrown away because RetriableStream committed";
private static final String AUTHORITY = "fakeAuthority";
private static final Compressor COMPRESSOR = Codec.Identity.NONE;
private static final DecompressorRegistry DECOMPRESSOR_REGISTRY =
DecompressorRegistry.getDefaultInstance();
private static final int MAX_INBOUND_MESSAGE_SIZE = 1234;
private static final int MAX_OUTBOUND_MESSAGE_SIZE = 5678;
private static final long PER_RPC_BUFFER_LIMIT = 1000;
private static final long CHANNEL_BUFFER_LIMIT = 2000;
private static final int MAX_ATTEMPTS = 6;
private static final long INITIAL_BACKOFF_IN_SECONDS = 100;
private static final long HEDGING_DELAY_IN_SECONDS = 100;
private static final long MAX_BACKOFF_IN_SECONDS = 700;
private static final double BACKOFF_MULTIPLIER = 2D;
private static final double FAKE_RANDOM = .5D;
private static final ClientStreamTracer.StreamInfo STREAM_INFO =
ClientStreamTracer.StreamInfo.newBuilder().build();
static {
RetriableStream.setRandom(
// not random
new Random() {
@Override
public double nextDouble() {
return FAKE_RANDOM;
}
});
}
private static final Code RETRIABLE_STATUS_CODE_1 = Code.UNAVAILABLE;
private static final Code RETRIABLE_STATUS_CODE_2 = Code.DATA_LOSS;
private static final Code NON_RETRIABLE_STATUS_CODE = Code.INTERNAL;
private static final Code NON_FATAL_STATUS_CODE_1 = Code.UNAVAILABLE;
private static final Code NON_FATAL_STATUS_CODE_2 = Code.DATA_LOSS;
private static final Code FATAL_STATUS_CODE = Code.INTERNAL;
private static final RetryPolicy RETRY_POLICY =
new RetryPolicy(
MAX_ATTEMPTS,
TimeUnit.SECONDS.toNanos(INITIAL_BACKOFF_IN_SECONDS),
TimeUnit.SECONDS.toNanos(MAX_BACKOFF_IN_SECONDS),
BACKOFF_MULTIPLIER,
null,
ImmutableSet.of(RETRIABLE_STATUS_CODE_1, RETRIABLE_STATUS_CODE_2));
private static final HedgingPolicy HEDGING_POLICY =
new HedgingPolicy(
MAX_ATTEMPTS,
TimeUnit.SECONDS.toNanos(HEDGING_DELAY_IN_SECONDS),
ImmutableSet.of(NON_FATAL_STATUS_CODE_1, NON_FATAL_STATUS_CODE_2));
private final RetriableStreamRecorder retriableStreamRecorder =
mock(RetriableStreamRecorder.class);
private final ClientStreamListener masterListener = mock(ClientStreamListener.class);
private final MethodDescriptor<String, String> method =
MethodDescriptor.<String, String>newBuilder()
.setType(MethodType.BIDI_STREAMING)
.setFullMethodName(MethodDescriptor.generateFullMethodName("service_foo", "method_bar"))
.setRequestMarshaller(new StringMarshaller())
.setResponseMarshaller(new StringMarshaller())
.build();
private final ChannelBufferMeter channelBufferUsed = new ChannelBufferMeter();
private final FakeClock fakeClock = new FakeClock();
private final class RecordedRetriableStream extends RetriableStream<String> {
RecordedRetriableStream(MethodDescriptor<String, ?> method, Metadata headers,
ChannelBufferMeter channelBufferUsed, long perRpcBufferLimit, long channelBufferLimit,
Executor callExecutor,
ScheduledExecutorService scheduledExecutorService,
@Nullable RetryPolicy retryPolicy,
@Nullable HedgingPolicy hedgingPolicy,
@Nullable Throttle throttle) {
super(
method, headers, channelBufferUsed, perRpcBufferLimit, channelBufferLimit, callExecutor,
scheduledExecutorService,
retryPolicy,
hedgingPolicy,
throttle);
}
@Override
void postCommit() {
retriableStreamRecorder.postCommit();
}
@Override
ClientStream newSubstream(
Metadata metadata, ClientStreamTracer.Factory tracerFactory, int previousAttempts,
boolean isTransparentRetry) {
bufferSizeTracer =
tracerFactory.newClientStreamTracer(STREAM_INFO, metadata);
int actualPreviousRpcAttemptsInHeader = metadata.get(GRPC_PREVIOUS_RPC_ATTEMPTS) == null
? 0 : Integer.valueOf(metadata.get(GRPC_PREVIOUS_RPC_ATTEMPTS));
return retriableStreamRecorder.newSubstream(actualPreviousRpcAttemptsInHeader);
}
@Override
Status prestart() {
return retriableStreamRecorder.prestart();
}
}
private final RetriableStream<String> retriableStream =
newThrottledRetriableStream(null /* throttle */);
private final RetriableStream<String> hedgingStream =
newThrottledHedgingStream(null /* throttle */);
private ClientStreamTracer bufferSizeTracer;
private RetriableStream<String> newThrottledRetriableStream(Throttle throttle) {
return new RecordedRetriableStream(
method, new Metadata(), channelBufferUsed, PER_RPC_BUFFER_LIMIT, CHANNEL_BUFFER_LIMIT,
MoreExecutors.directExecutor(), fakeClock.getScheduledExecutorService(), RETRY_POLICY,
null, throttle);
}
private RetriableStream<String> newThrottledHedgingStream(Throttle throttle) {
return new RecordedRetriableStream(
method, new Metadata(), channelBufferUsed, PER_RPC_BUFFER_LIMIT, CHANNEL_BUFFER_LIMIT,
MoreExecutors.directExecutor(), fakeClock.getScheduledExecutorService(),
null, HEDGING_POLICY, throttle);
}
@After
public void tearDown() {
assertEquals(0, fakeClock.numPendingTasks());
}
@Test
public void retry_everythingDrained() {
ClientStream mockStream1 = mock(ClientStream.class);
ClientStream mockStream2 = mock(ClientStream.class);
ClientStream mockStream3 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
doAnswer(new Answer<Void>() {
@Override
public Void answer(InvocationOnMock in) {
InsightBuilder insight = (InsightBuilder) in.getArguments()[0];
insight.appendKeyValue("remote_addr", "2.2.2.2:443");
return null;
}
}).when(mockStream3).appendTimeoutInsight(any(InsightBuilder.class));
InOrder inOrder =
inOrder(retriableStreamRecorder, masterListener, mockStream1, mockStream2, mockStream3);
// stream settings before start
retriableStream.setAuthority(AUTHORITY);
retriableStream.setCompressor(COMPRESSOR);
retriableStream.setDecompressorRegistry(DECOMPRESSOR_REGISTRY);
retriableStream.setFullStreamDecompression(false);
retriableStream.setFullStreamDecompression(true);
retriableStream.setMaxInboundMessageSize(MAX_INBOUND_MESSAGE_SIZE);
retriableStream.setMessageCompression(true);
retriableStream.setMaxOutboundMessageSize(MAX_OUTBOUND_MESSAGE_SIZE);
retriableStream.setMessageCompression(false);
inOrder.verifyNoMoreInteractions();
// start
retriableStream.start(masterListener);
inOrder.verify(retriableStreamRecorder).prestart();
inOrder.verify(retriableStreamRecorder).newSubstream(0);
inOrder.verify(mockStream1).setAuthority(AUTHORITY);
inOrder.verify(mockStream1).setCompressor(COMPRESSOR);
inOrder.verify(mockStream1).setDecompressorRegistry(DECOMPRESSOR_REGISTRY);
inOrder.verify(mockStream1).setFullStreamDecompression(false);
inOrder.verify(mockStream1).setFullStreamDecompression(true);
inOrder.verify(mockStream1).setMaxInboundMessageSize(MAX_INBOUND_MESSAGE_SIZE);
inOrder.verify(mockStream1).setMessageCompression(true);
inOrder.verify(mockStream1).setMaxOutboundMessageSize(MAX_OUTBOUND_MESSAGE_SIZE);
inOrder.verify(mockStream1).setMessageCompression(false);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
inOrder.verify(mockStream1).start(sublistenerCaptor1.capture());
inOrder.verify(mockStream1).isReady();
inOrder.verifyNoMoreInteractions();
retriableStream.sendMessage("msg1");
retriableStream.sendMessage("msg2");
retriableStream.request(345);
retriableStream.flush();
retriableStream.flush();
retriableStream.sendMessage("msg3");
retriableStream.request(456);
inOrder.verify(mockStream1).writeMessage(any(InputStream.class));
inOrder.verify(mockStream1).flush(); // Memory leak workaround
inOrder.verify(mockStream1).writeMessage(any(InputStream.class));
inOrder.verify(mockStream1).flush(); // Memory leak workaround
inOrder.verify(mockStream1).request(345);
inOrder.verify(mockStream1, times(2)).flush();
inOrder.verify(mockStream1).writeMessage(any(InputStream.class));
inOrder.verify(mockStream1).flush(); // Memory leak workaround
inOrder.verify(mockStream1).request(456);
inOrder.verifyNoMoreInteractions();
// retry1
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_2), PROCESSED, new Metadata());
assertEquals(1, fakeClock.numPendingTasks());
// send more messages during backoff
retriableStream.sendMessage("msg1 during backoff1");
retriableStream.sendMessage("msg2 during backoff1");
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM) - 1L, TimeUnit.SECONDS);
inOrder.verifyNoMoreInteractions();
assertEquals(1, fakeClock.numPendingTasks());
fakeClock.forwardTime(1L, TimeUnit.SECONDS);
assertEquals(0, fakeClock.numPendingTasks());
inOrder.verify(retriableStreamRecorder).newSubstream(1);
inOrder.verify(mockStream2).setAuthority(AUTHORITY);
inOrder.verify(mockStream2).setCompressor(COMPRESSOR);
inOrder.verify(mockStream2).setDecompressorRegistry(DECOMPRESSOR_REGISTRY);
inOrder.verify(mockStream2).setFullStreamDecompression(false);
inOrder.verify(mockStream2).setFullStreamDecompression(true);
inOrder.verify(mockStream2).setMaxInboundMessageSize(MAX_INBOUND_MESSAGE_SIZE);
inOrder.verify(mockStream2).setMessageCompression(true);
inOrder.verify(mockStream2).setMaxOutboundMessageSize(MAX_OUTBOUND_MESSAGE_SIZE);
inOrder.verify(mockStream2).setMessageCompression(false);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor2 =
ArgumentCaptor.forClass(ClientStreamListener.class);
inOrder.verify(mockStream2).start(sublistenerCaptor2.capture());
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
inOrder.verify(mockStream2).request(345);
inOrder.verify(mockStream2, times(2)).flush();
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
inOrder.verify(mockStream2).request(456);
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
inOrder.verify(mockStream2).isReady();
inOrder.verifyNoMoreInteractions();
// send more messages
retriableStream.sendMessage("msg1 after retry1");
retriableStream.sendMessage("msg2 after retry1");
// mockStream1 is closed so it is not in the drainedSubstreams
verifyNoMoreInteractions(mockStream1);
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).flush(); // Memory leak workaround
// retry2
doReturn(mockStream3).when(retriableStreamRecorder).newSubstream(2);
sublistenerCaptor2.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
assertEquals(1, fakeClock.numPendingTasks());
// send more messages during backoff
retriableStream.sendMessage("msg1 during backoff2");
retriableStream.sendMessage("msg2 during backoff2");
retriableStream.sendMessage("msg3 during backoff2");
fakeClock.forwardTime(
(long) (INITIAL_BACKOFF_IN_SECONDS * BACKOFF_MULTIPLIER * FAKE_RANDOM) - 1L,
TimeUnit.SECONDS);
inOrder.verifyNoMoreInteractions();
assertEquals(1, fakeClock.numPendingTasks());
fakeClock.forwardTime(1L, TimeUnit.SECONDS);
assertEquals(0, fakeClock.numPendingTasks());
inOrder.verify(retriableStreamRecorder).newSubstream(2);
inOrder.verify(mockStream3).setAuthority(AUTHORITY);
inOrder.verify(mockStream3).setCompressor(COMPRESSOR);
inOrder.verify(mockStream3).setDecompressorRegistry(DECOMPRESSOR_REGISTRY);
inOrder.verify(mockStream3).setFullStreamDecompression(false);
inOrder.verify(mockStream3).setFullStreamDecompression(true);
inOrder.verify(mockStream3).setMaxInboundMessageSize(MAX_INBOUND_MESSAGE_SIZE);
inOrder.verify(mockStream3).setMessageCompression(true);
inOrder.verify(mockStream3).setMaxOutboundMessageSize(MAX_OUTBOUND_MESSAGE_SIZE);
inOrder.verify(mockStream3).setMessageCompression(false);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor3 =
ArgumentCaptor.forClass(ClientStreamListener.class);
inOrder.verify(mockStream3).start(sublistenerCaptor3.capture());
inOrder.verify(mockStream3).writeMessage(any(InputStream.class));
inOrder.verify(mockStream3).flush(); // Memory leak workaround
inOrder.verify(mockStream3).writeMessage(any(InputStream.class));
inOrder.verify(mockStream3).flush(); // Memory leak workaround
inOrder.verify(mockStream3).request(345);
inOrder.verify(mockStream3, times(2)).flush();
inOrder.verify(mockStream3).writeMessage(any(InputStream.class));
inOrder.verify(mockStream3).flush(); // Memory leak workaround
inOrder.verify(mockStream3).request(456);
for (int i = 0; i < 7; i++) {
inOrder.verify(mockStream3).writeMessage(any(InputStream.class));
inOrder.verify(mockStream3).flush(); // Memory leak workaround
}
inOrder.verify(mockStream3).isReady();
inOrder.verifyNoMoreInteractions();
InsightBuilder insight = new InsightBuilder();
retriableStream.appendTimeoutInsight(insight);
assertThat(insight.toString()).isEqualTo(
"[closed=[DATA_LOSS, UNAVAILABLE], open=[[remote_addr=2.2.2.2:443]]]");
// no more retry
sublistenerCaptor3.getValue().closed(
Status.fromCode(NON_RETRIABLE_STATUS_CODE), PROCESSED, new Metadata());
inOrder.verify(retriableStreamRecorder).postCommit();
inOrder.verify(masterListener).closed(
any(Status.class), any(RpcProgress.class), any(Metadata.class));
inOrder.verifyNoMoreInteractions();
insight = new InsightBuilder();
retriableStream.appendTimeoutInsight(insight);
assertThat(insight.toString()).isEqualTo(
"[closed=[DATA_LOSS, UNAVAILABLE, INTERNAL], committed=[remote_addr=2.2.2.2:443]]");
}
@Test
public void headersRead_cancel() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
sublistenerCaptor1.getValue().headersRead(new Metadata());
inOrder.verify(retriableStreamRecorder).postCommit();
retriableStream.cancel(Status.CANCELLED);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void retry_headersRead_cancel() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
// retry
ClientStream mockStream2 = mock(ClientStream.class);
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
assertEquals(1, fakeClock.numPendingTasks());
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor2 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream2).start(sublistenerCaptor2.capture());
inOrder.verify(retriableStreamRecorder, never()).postCommit();
// headersRead
sublistenerCaptor2.getValue().headersRead(new Metadata());
inOrder.verify(retriableStreamRecorder).postCommit();
// cancel
retriableStream.cancel(Status.CANCELLED);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void headersRead_closed() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
sublistenerCaptor1.getValue().headersRead(new Metadata());
inOrder.verify(retriableStreamRecorder).postCommit();
Status status = Status.fromCode(RETRIABLE_STATUS_CODE_1);
Metadata metadata = new Metadata();
sublistenerCaptor1.getValue().closed(status, PROCESSED, metadata);
verify(masterListener).closed(status, PROCESSED, metadata);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void retry_headersRead_closed() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
// retry
ClientStream mockStream2 = mock(ClientStream.class);
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor2 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream2).start(sublistenerCaptor2.capture());
inOrder.verify(retriableStreamRecorder, never()).postCommit();
// headersRead
sublistenerCaptor2.getValue().headersRead(new Metadata());
inOrder.verify(retriableStreamRecorder).postCommit();
// closed even with retriable status
Status status = Status.fromCode(RETRIABLE_STATUS_CODE_1);
Metadata metadata = new Metadata();
sublistenerCaptor2.getValue().closed(status, PROCESSED, metadata);
verify(masterListener).closed(status, PROCESSED, metadata);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void cancel_closed() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
// cancel
retriableStream.cancel(Status.CANCELLED);
inOrder.verify(retriableStreamRecorder).postCommit();
ArgumentCaptor<Status> statusCaptor = ArgumentCaptor.forClass(Status.class);
verify(mockStream1).cancel(statusCaptor.capture());
assertEquals(Status.CANCELLED.getCode(), statusCaptor.getValue().getCode());
assertEquals(CANCELLED_BECAUSE_COMMITTED, statusCaptor.getValue().getDescription());
// closed even with retriable status
Status status = Status.fromCode(RETRIABLE_STATUS_CODE_1);
Metadata metadata = new Metadata();
sublistenerCaptor1.getValue().closed(status, PROCESSED, metadata);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void retry_cancel_closed() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
// retry
ClientStream mockStream2 = mock(ClientStream.class);
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor2 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream2).start(sublistenerCaptor2.capture());
inOrder.verify(retriableStreamRecorder, never()).postCommit();
// cancel
retriableStream.cancel(Status.CANCELLED);
inOrder.verify(retriableStreamRecorder).postCommit();
ArgumentCaptor<Status> statusCaptor = ArgumentCaptor.forClass(Status.class);
verify(mockStream2).cancel(statusCaptor.capture());
assertEquals(Status.CANCELLED.getCode(), statusCaptor.getValue().getCode());
assertEquals(CANCELLED_BECAUSE_COMMITTED, statusCaptor.getValue().getDescription());
// closed
Status status = Status.fromCode(NON_RETRIABLE_STATUS_CODE);
Metadata metadata = new Metadata();
sublistenerCaptor2.getValue().closed(status, PROCESSED, metadata);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void unretriableClosed_cancel() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
// closed
Status status = Status.fromCode(NON_RETRIABLE_STATUS_CODE);
Metadata metadata = new Metadata();
sublistenerCaptor1.getValue().closed(status, PROCESSED, metadata);
inOrder.verify(retriableStreamRecorder).postCommit();
verify(masterListener).closed(status, PROCESSED, metadata);
// cancel
retriableStream.cancel(Status.CANCELLED);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void retry_unretriableClosed_cancel() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
InOrder inOrder = inOrder(retriableStreamRecorder);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
// retry
ClientStream mockStream2 = mock(ClientStream.class);
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor2 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream2).start(sublistenerCaptor2.capture());
inOrder.verify(retriableStreamRecorder, never()).postCommit();
// closed
Status status = Status.fromCode(NON_RETRIABLE_STATUS_CODE);
Metadata metadata = new Metadata();
sublistenerCaptor2.getValue().closed(status, PROCESSED, metadata);
inOrder.verify(retriableStreamRecorder).postCommit();
verify(masterListener).closed(status, PROCESSED, metadata);
// cancel
retriableStream.cancel(Status.CANCELLED);
inOrder.verify(retriableStreamRecorder, never()).postCommit();
}
@Test
public void retry_cancelWhileBackoff() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
verify(mockStream1).isReady();
// retry
ClientStream mockStream2 = mock(ClientStream.class);
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
// cancel while backoff
assertEquals(1, fakeClock.numPendingTasks());
verify(retriableStreamRecorder, never()).postCommit();
retriableStream.cancel(Status.CANCELLED);
verify(retriableStreamRecorder).postCommit();
verifyNoMoreInteractions(mockStream1);
verifyNoMoreInteractions(mockStream2);
}
@Test
public void operationsWhileDraining() {
final ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
final AtomicReference<ClientStreamListener> sublistenerCaptor2 =
new AtomicReference<>();
final Status cancelStatus = Status.CANCELLED.withDescription("c");
ClientStream mockStream1 =
mock(
ClientStream.class,
delegatesTo(
new NoopClientStream() {
@Override
public void request(int numMessages) {
retriableStream.sendMessage("substream1 request " + numMessages);
sublistenerCaptor1.getValue().onReady();
if (numMessages > 1) {
retriableStream.request(--numMessages);
}
}
@Override
public boolean isReady() {
return true;
}
}));
final ClientStream mockStream2 =
mock(
ClientStream.class,
delegatesTo(
new NoopClientStream() {
@Override
public void start(ClientStreamListener listener) {
sublistenerCaptor2.set(listener);
}
@Override
public void request(int numMessages) {
retriableStream.sendMessage("substream2 request " + numMessages);
sublistenerCaptor2.get().onReady();
if (numMessages == 3) {
sublistenerCaptor2.get().headersRead(new Metadata());
}
if (numMessages == 2) {
retriableStream.request(100);
}
if (numMessages == 100) {
retriableStream.cancel(cancelStatus);
}
}
@Override
public boolean isReady() {
return true;
}
}));
InOrder inOrder = inOrder(retriableStreamRecorder, mockStream1, mockStream2, masterListener);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
inOrder.verify(mockStream1).start(sublistenerCaptor1.capture());
retriableStream.request(3);
inOrder.verify(mockStream1).request(3);
inOrder.verify(mockStream1).writeMessage(any(InputStream.class)); // msg "substream1 request 3"
inOrder.verify(mockStream1).request(2);
inOrder.verify(mockStream1).writeMessage(any(InputStream.class)); // msg "substream1 request 2"
inOrder.verify(mockStream1).request(1);
inOrder.verify(mockStream1).writeMessage(any(InputStream.class)); // msg "substream1 request 1"
inOrder.verify(masterListener).onReady();
// retry
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
assertEquals(1, fakeClock.numPendingTasks());
// send more requests during backoff
retriableStream.request(789);
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
inOrder.verify(mockStream2).start(sublistenerCaptor2.get());
inOrder.verify(mockStream2).request(3);
inOrder.verify(retriableStreamRecorder).postCommit();
inOrder.verify(mockStream2).writeMessage(any(InputStream.class)); // msg "substream1 request 3"
inOrder.verify(mockStream2).request(2);
inOrder.verify(mockStream2).writeMessage(any(InputStream.class)); // msg "substream1 request 2"
inOrder.verify(mockStream2).request(1);
// msg "substream1 request 1"
inOrder.verify(mockStream2).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).request(789);
// msg "substream2 request 3"
// msg "substream2 request 2"
inOrder.verify(mockStream2, times(2)).writeMessage(any(InputStream.class));
inOrder.verify(mockStream2).request(100);
inOrder.verify(mockStream2).cancel(cancelStatus);
inOrder.verify(masterListener, never()).onReady();
// "substream2 request 1" will never be sent
inOrder.verify(mockStream2, never()).writeMessage(any(InputStream.class));
}
@Test
public void cancelWhileDraining() {
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
ClientStream mockStream1 = mock(ClientStream.class);
ClientStream mockStream2 =
mock(
ClientStream.class,
delegatesTo(
new NoopClientStream() {
@Override
public void request(int numMessages) {
retriableStream.cancel(
Status.CANCELLED.withDescription("cancelled while requesting"));
}
}));
InOrder inOrder = inOrder(retriableStreamRecorder, mockStream1, mockStream2);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
inOrder.verify(mockStream1).start(sublistenerCaptor1.capture());
retriableStream.request(3);
inOrder.verify(mockStream1).request(3);
// retry
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
inOrder.verify(mockStream2).start(any(ClientStreamListener.class));
inOrder.verify(mockStream2).request(3);
inOrder.verify(retriableStreamRecorder).postCommit();
ArgumentCaptor<Status> statusCaptor = ArgumentCaptor.forClass(Status.class);
inOrder.verify(mockStream2).cancel(statusCaptor.capture());
assertThat(statusCaptor.getValue().getCode()).isEqualTo(Code.CANCELLED);
assertThat(statusCaptor.getValue().getDescription())
.isEqualTo("Stream thrown away because RetriableStream committed");
verify(masterListener).closed(
statusCaptor.capture(), any(RpcProgress.class), any(Metadata.class));
assertThat(statusCaptor.getValue().getCode()).isEqualTo(Code.CANCELLED);
assertThat(statusCaptor.getValue().getDescription()).isEqualTo("cancelled while requesting");
}
@Test
public void cancelWhileRetryStart() {
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
ClientStream mockStream1 = mock(ClientStream.class);
ClientStream mockStream2 =
mock(
ClientStream.class,
delegatesTo(
new NoopClientStream() {
@Override
public void start(ClientStreamListener listener) {
retriableStream.cancel(
Status.CANCELLED.withDescription("cancelled while retry start"));
}
}));
InOrder inOrder = inOrder(retriableStreamRecorder, mockStream1, mockStream2);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
inOrder.verify(mockStream1).start(sublistenerCaptor1.capture());
// retry
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
sublistenerCaptor1.getValue().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
inOrder.verify(mockStream2).start(any(ClientStreamListener.class));
inOrder.verify(retriableStreamRecorder).postCommit();
ArgumentCaptor<Status> statusCaptor = ArgumentCaptor.forClass(Status.class);
inOrder.verify(mockStream2).cancel(statusCaptor.capture());
assertThat(statusCaptor.getValue().getCode()).isEqualTo(Code.CANCELLED);
assertThat(statusCaptor.getValue().getDescription())
.isEqualTo("Stream thrown away because RetriableStream committed");
verify(masterListener).closed(
statusCaptor.capture(), any(RpcProgress.class), any(Metadata.class));
assertThat(statusCaptor.getValue().getCode()).isEqualTo(Code.CANCELLED);
assertThat(statusCaptor.getValue().getDescription()).isEqualTo("cancelled while retry start");
}
@Test
public void operationsAfterImmediateCommit() {
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
ClientStream mockStream1 = mock(ClientStream.class);
InOrder inOrder = inOrder(retriableStreamRecorder, mockStream1);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
// drained
inOrder.verify(mockStream1).start(sublistenerCaptor1.capture());
// commit
sublistenerCaptor1.getValue().headersRead(new Metadata());
retriableStream.request(3);
inOrder.verify(mockStream1).request(3);
retriableStream.sendMessage("msg 1");
inOrder.verify(mockStream1).writeMessage(any(InputStream.class));
}
@Test
public void isReady_whenDrained() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
assertFalse(retriableStream.isReady());
doReturn(true).when(mockStream1).isReady();
assertTrue(retriableStream.isReady());
}
@Test
public void isReady_whileDraining() {
final AtomicReference<ClientStreamListener> sublistenerCaptor1 =
new AtomicReference<>();
final List<Boolean> readiness = new ArrayList<>();
ClientStream mockStream1 =
mock(
ClientStream.class,
delegatesTo(
new NoopClientStream() {
@Override
public void start(ClientStreamListener listener) {
sublistenerCaptor1.set(listener);
readiness.add(retriableStream.isReady()); // expected false b/c in draining
}
@Override
public boolean isReady() {
return true;
}
}));
final ClientStream mockStream2 =
mock(
ClientStream.class,
delegatesTo(
new NoopClientStream() {
@Override
public void start(ClientStreamListener listener) {
readiness.add(retriableStream.isReady()); // expected false b/c in draining
}
@Override
public boolean isReady() {
return true;
}
}));
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
verify(mockStream1).start(sublistenerCaptor1.get());
readiness.add(retriableStream.isReady()); // expected true
// retry
doReturn(mockStream2).when(retriableStreamRecorder).newSubstream(1);
doReturn(false).when(mockStream1).isReady(); // mockStream1 closed, so isReady false
sublistenerCaptor1.get().closed(
Status.fromCode(RETRIABLE_STATUS_CODE_1), PROCESSED, new Metadata());
assertEquals(1, fakeClock.numPendingTasks());
// send more requests during backoff
retriableStream.request(789);
readiness.add(retriableStream.isReady()); // expected false b/c in backoff
fakeClock.forwardTime((long) (INITIAL_BACKOFF_IN_SECONDS * FAKE_RANDOM), TimeUnit.SECONDS);
verify(mockStream2).start(any(ClientStreamListener.class));
readiness.add(retriableStream.isReady()); // expected true
assertThat(readiness).containsExactly(false, true, false, false, true).inOrder();
}
@Test
public void messageAvailable() {
ClientStream mockStream1 = mock(ClientStream.class);
doReturn(mockStream1).when(retriableStreamRecorder).newSubstream(0);
retriableStream.start(masterListener);
ArgumentCaptor<ClientStreamListener> sublistenerCaptor1 =
ArgumentCaptor.forClass(ClientStreamListener.class);
verify(mockStream1).start(sublistenerCaptor1.capture());
ClientStreamListener listener = sublistenerCaptor1.getValue();
listener.headersRead(new Metadata());
MessageProducer messageProducer = mock(MessageProducer.class);
listener.messagesAvailable(messageProducer);
verify(masterListener).messagesAvailable(messageProducer);
}
@Test
public void closedWhileDraining() {
ClientStream mockStream1 = mock(ClientStream.class);
final ClientStream mockStream2 =
mock(
ClientStream.class,
delegatesTo(