/
SpannerRetryHelperTest.java
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/
SpannerRetryHelperTest.java
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/*
* Copyright 2019 Google LLC
*
* 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 com.google.cloud.spanner;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.fail;
import com.google.common.base.Stopwatch;
import com.google.protobuf.Duration;
import com.google.rpc.RetryInfo;
import io.grpc.Context;
import io.grpc.Context.CancellableContext;
import io.grpc.Deadline;
import io.grpc.Metadata;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;
import io.grpc.protobuf.ProtoUtils;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class SpannerRetryHelperTest {
@Test
public void testCancelledContext() {
final CancellableContext withCancellation = Context.current().withCancellation();
final CountDownLatch latch = new CountDownLatch(1);
final Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
latch.countDown();
throw SpannerExceptionFactory.newSpannerException(ErrorCode.ABORTED, "test");
}
};
ScheduledExecutorService service = Executors.newScheduledThreadPool(1);
service.submit(
new Callable<Void>() {
@Override
public Void call() throws Exception {
latch.await();
withCancellation.cancel(new InterruptedException());
return null;
}
});
try {
withCancellation.run(
new Runnable() {
@Override
public void run() {
SpannerRetryHelper.runTxWithRetriesOnAborted(callable);
}
});
fail("missing expected exception");
} catch (SpannerException e) {
if (e.getErrorCode() != ErrorCode.CANCELLED) {
fail(
String.format(
"unexpected error %s, expected %s",
e.getErrorCode().name(), ErrorCode.CANCELLED.name()));
}
}
}
@Test
public void testTimedoutContext() throws InterruptedException {
ScheduledExecutorService service = Executors.newScheduledThreadPool(1);
final Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
throw SpannerExceptionFactory.newSpannerException(ErrorCode.ABORTED, "test");
}
};
try {
final CancellableContext withDeadline =
Context.current().withDeadline(Deadline.after(1L, TimeUnit.MILLISECONDS), service);
withDeadline.run(
new Runnable() {
@Override
public void run() {
SpannerRetryHelper.runTxWithRetriesOnAborted(callable);
}
});
fail("missing expected exception");
} catch (SpannerException e) {
if (e.getErrorCode() != ErrorCode.DEADLINE_EXCEEDED) {
fail(
String.format(
"unexpected error %s, expected %s",
e.getErrorCode().name(), ErrorCode.DEADLINE_EXCEEDED.name()));
}
}
}
@Test
public void noException() {
Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
return 1 + 1;
}
};
assertThat(SpannerRetryHelper.runTxWithRetriesOnAborted(callable)).isEqualTo(2);
}
@Test(expected = IllegalStateException.class)
public void propagateUncheckedException() {
Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
throw new IllegalStateException("test");
}
};
SpannerRetryHelper.runTxWithRetriesOnAborted(callable);
}
@Test
public void retryOnAborted() {
final AtomicInteger attempts = new AtomicInteger();
Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
if (attempts.getAndIncrement() == 0) {
throw abortedWithRetryInfo((int) TimeUnit.MILLISECONDS.toNanos(1L));
}
return 1 + 1;
}
};
assertThat(SpannerRetryHelper.runTxWithRetriesOnAborted(callable)).isEqualTo(2);
}
@Test
public void retryMultipleTimesOnAborted() {
final AtomicInteger attempts = new AtomicInteger();
Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
if (attempts.getAndIncrement() < 2) {
throw abortedWithRetryInfo((int) TimeUnit.MILLISECONDS.toNanos(1));
}
return 1 + 1;
}
};
assertThat(SpannerRetryHelper.runTxWithRetriesOnAborted(callable)).isEqualTo(2);
}
@Test(expected = IllegalStateException.class)
public void retryOnAbortedAndThenPropagateUnchecked() {
final AtomicInteger attempts = new AtomicInteger();
Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
if (attempts.getAndIncrement() == 0) {
throw abortedWithRetryInfo((int) TimeUnit.MILLISECONDS.toNanos(1L));
}
throw new IllegalStateException("test");
}
};
SpannerRetryHelper.runTxWithRetriesOnAborted(callable);
}
@Test
public void testExceptionWithRetryInfo() {
final int RETRY_DELAY_NANOS = 100_000_000;
Metadata.Key<RetryInfo> key = ProtoUtils.keyForProto(RetryInfo.getDefaultInstance());
Status status = Status.fromCodeValue(Status.Code.ABORTED.value());
Metadata trailers = new Metadata();
RetryInfo retryInfo =
RetryInfo.newBuilder()
.setRetryDelay(Duration.newBuilder().setNanos(RETRY_DELAY_NANOS).build())
.build();
trailers.put(key, retryInfo);
final SpannerException e =
SpannerExceptionFactory.newSpannerException(new StatusRuntimeException(status, trailers));
final AtomicInteger attempts = new AtomicInteger();
Callable<Integer> callable =
new Callable<Integer>() {
@Override
public Integer call() throws Exception {
if (attempts.getAndIncrement() == 0) {
throw e;
}
return 1 + 1;
}
};
// The following call should take at least 100ms, as that is the retry delay specified in the
// retry info of the exception.
Stopwatch watch = Stopwatch.createStarted();
assertThat(SpannerRetryHelper.runTxWithRetriesOnAborted(callable)).isEqualTo(2);
long elapsed = watch.elapsed(TimeUnit.NANOSECONDS);
assertThat(elapsed >= RETRY_DELAY_NANOS).isTrue();
}
private SpannerException abortedWithRetryInfo(int nanos) {
Metadata.Key<RetryInfo> key = ProtoUtils.keyForProto(RetryInfo.getDefaultInstance());
Status status = Status.fromCodeValue(Status.Code.ABORTED.value());
Metadata trailers = new Metadata();
RetryInfo retryInfo =
RetryInfo.newBuilder()
.setRetryDelay(Duration.newBuilder().setNanos(nanos).setSeconds(0L))
.build();
trailers.put(key, retryInfo);
return SpannerExceptionFactory.newSpannerException(
ErrorCode.ABORTED, "test", new StatusRuntimeException(status, trailers));
}
}