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BaseSessionPoolTest.java
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/
BaseSessionPoolTest.java
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/*
* Copyright 2017 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 org.mockito.Mockito.any;
import static org.mockito.Mockito.anyLong;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;
import com.google.api.core.ApiFutures;
import com.google.cloud.grpc.GrpcTransportOptions.ExecutorFactory;
import com.google.cloud.spanner.SessionPool.Clock;
import com.google.protobuf.Empty;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.threeten.bp.Instant;
abstract class BaseSessionPoolTest {
ScheduledExecutorService mockExecutor;
int sessionIndex;
final class TestExecutorFactory implements ExecutorFactory<ScheduledExecutorService> {
@Override
public ScheduledExecutorService get() {
ScheduledExecutorService realExecutor = new ScheduledThreadPoolExecutor(2);
mockExecutor = spy(realExecutor);
@SuppressWarnings("rawtypes")
ScheduledFuture mockFuture = mock(ScheduledFuture.class);
// To prevent maintenance loop from running.
doReturn(mockFuture)
.when(mockExecutor)
.scheduleAtFixedRate(any(Runnable.class), anyLong(), anyLong(), any(TimeUnit.class));
return mockExecutor;
}
@Override
public void release(ScheduledExecutorService executor) {
executor.shutdown();
}
}
SessionImpl mockSession() {
SessionImpl session = mock(SessionImpl.class);
when(session.getName())
.thenReturn(
"projects/dummy/instances/dummy/database/dummy/sessions/session" + sessionIndex);
when(session.asyncClose()).thenReturn(ApiFutures.immediateFuture(Empty.getDefaultInstance()));
sessionIndex++;
return session;
}
void runMaintainanceLoop(FakeClock clock, SessionPool pool, long numCycles) {
for (int i = 0; i < numCycles; i++) {
pool.poolMaintainer.maintainPool();
clock.currentTimeMillis += SessionPool.PoolMaintainer.LOOP_FREQUENCY;
}
}
static class FakeClock extends Clock {
volatile long currentTimeMillis;
@Override
public Instant instant() {
return Instant.ofEpochMilli(currentTimeMillis);
}
}
}