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EnhancedBigtableStubCloseRetryTest.java
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EnhancedBigtableStubCloseRetryTest.java
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/*
* Copyright 2021 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
*
* https://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.bigtable.data.v2.stub;
import static com.google.common.truth.Truth.assertThat;
import com.google.api.core.ApiFuture;
import com.google.api.gax.core.NoCredentialsProvider;
import com.google.bigtable.v2.BigtableGrpc;
import com.google.bigtable.v2.ReadRowsRequest;
import com.google.bigtable.v2.ReadRowsResponse;
import com.google.cloud.bigtable.data.v2.BigtableDataSettings;
import com.google.cloud.bigtable.data.v2.FakeServiceHelper;
import com.google.cloud.bigtable.data.v2.models.Query;
import com.google.cloud.bigtable.data.v2.models.Row;
import io.grpc.Status;
import io.grpc.stub.StreamObserver;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.function.ThrowingRunnable;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Ensures that closing a client during exponential retry will not hang any requests. */
@RunWith(JUnit4.class)
public class EnhancedBigtableStubCloseRetryTest {
private static final String PROJECT_ID = "fake-project";
private static final String INSTANCE_ID = "fake-instance";
private ExecutorService testExecutor;
private BlockingQueue<ReadRowsRequest> requests;
private AtomicInteger numRequests;
private FakeServiceHelper serviceHelper;
private EnhancedBigtableStub stub;
@Before
public void setUp() throws Exception {
testExecutor = Executors.newCachedThreadPool();
requests = new ArrayBlockingQueue<>(10);
numRequests = new AtomicInteger();
serviceHelper = new FakeServiceHelper(new FakeBigtable());
serviceHelper.start();
BigtableDataSettings.Builder settingBuilder =
BigtableDataSettings.newBuilderForEmulator(serviceHelper.getPort())
.setProjectId(PROJECT_ID)
.setInstanceId(INSTANCE_ID)
.setCredentialsProvider(NoCredentialsProvider.create())
.setRefreshingChannel(false);
stub = EnhancedBigtableStub.create(settingBuilder.build().getStubSettings());
}
@After
public void tearDown() throws Exception {
testExecutor.shutdown();
stub.close();
serviceHelper.shutdown();
}
@Test
public void outstandingRequestsFinishAfterClose() throws Exception {
final ApiFuture<List<Row>> resultFuture =
stub.readRowsCallable().all().futureCall(Query.create("table1"));
// wait for the first request to hit the server
requests.take();
// wait enough time for a retry attempt to be scheduled before closing the client
Thread.sleep(100);
stub.close();
ExecutionException error =
Assert.assertThrows(
ExecutionException.class,
new ThrowingRunnable() {
@Override
public void run() throws Throwable {
resultFuture.get();
}
});
assertThat(error.getCause()).isInstanceOf(RejectedExecutionException.class);
}
class FakeBigtable extends BigtableGrpc.BigtableImplBase {
@Override
public void readRows(
ReadRowsRequest request, StreamObserver<ReadRowsResponse> responseObserver) {
requests.add(request);
// Keep returning a retriable error
responseObserver.onError(Status.UNAVAILABLE.asRuntimeException());
}
}
}