/
SessionPoolIntegrationTest.java
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/
SessionPoolIntegrationTest.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 com.google.common.truth.Truth.assertThat;
import com.google.cloud.grpc.GrpcTransportOptions.ExecutorFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Integration tests for read and query.
*
* <p>See also {@code it/WriteIntegrationTest}, which provides coverage of writing and reading back
* all Cloud Spanner types.
*/
@Category(IntegrationTest.class)
@RunWith(JUnit4.class)
public class SessionPoolIntegrationTest {
@ClassRule public static IntegrationTestEnv env = new IntegrationTestEnv();
private static final String TABLE_NAME = "TestTable";
private static Database db;
@Rule public ExpectedException expectedException = ExpectedException.none();
private SessionPool pool;
@BeforeClass
public static void setUpDatabase() {
db =
env.getTestHelper()
.createTestDatabase(
"CREATE TABLE TestTable ("
+ " Key STRING(MAX) NOT NULL,"
+ " StringValue STRING(MAX),"
+ ") PRIMARY KEY (Key)",
"CREATE INDEX TestTableByValue ON TestTable(StringValue)");
// Includes k0..k14. Note that strings k{10,14} sort between k1 and k2.
List<Mutation> mutations = new ArrayList<>();
for (int i = 0; i < 15; ++i) {
mutations.add(
Mutation.newInsertOrUpdateBuilder(TABLE_NAME)
.set("Key")
.to("k" + i)
.set("StringValue")
.to("v" + i)
.build());
}
env.getTestHelper().getDatabaseClient(db).write(mutations);
}
@Before
public void setUp() throws Exception {
SessionPoolOptions options =
SessionPoolOptions.newBuilder().setMinSessions(1).setMaxSessions(2).build();
pool =
SessionPool.createPool(
options,
new ExecutorFactory<ScheduledExecutorService>() {
@Override
public void release(ScheduledExecutorService executor) {
executor.shutdown();
}
@Override
public ScheduledExecutorService get() {
return new ScheduledThreadPoolExecutor(2);
}
},
((SpannerImpl) env.getTestHelper().getClient()).getSessionClient(db.getId()));
}
@Test
public void sessionCreation() {
try (Session session = pool.getReadSession()) {
assertThat(session).isNotNull();
}
try (Session session = pool.getReadSession()) {
assertThat(session).isNotNull();
Session session2 = pool.getReadSession();
assertThat(session2).isNotNull();
session2.close();
}
}
@Test
public void poolExhaustion() throws Exception {
Session session1 = pool.getReadSession();
Session session2 = pool.getReadSession();
final CountDownLatch latch = new CountDownLatch(1);
new Thread(
new Runnable() {
@Override
public void run() {
try (Session session3 = pool.getReadSession()) {
latch.countDown();
}
}
})
.start();
assertThat(latch.await(5, TimeUnit.SECONDS)).isFalse();
session1.close();
session2.close();
latch.await();
}
@Test
public void multipleWaiters() throws Exception {
Session session1 = pool.getReadSession();
Session session2 = pool.getReadSession();
int numSessions = 5;
final CountDownLatch latch = new CountDownLatch(numSessions);
for (int i = 0; i < numSessions; i++) {
new Thread(
new Runnable() {
@Override
public void run() {
try (Session session = pool.getReadSession()) {
latch.countDown();
}
}
})
.start();
}
session1.close();
session2.close();
// Everyone should get session pretty quickly.
assertThat(latch.await(1, TimeUnit.SECONDS)).isTrue();
}
@Test
public void closeQuicklyDoesNotBlockIndefinitely() throws Exception {
pool.closeAsync(new SpannerImpl.ClosedException()).get();
}
@Test
public void closeAfterInitialCreateDoesNotBlockIndefinitely() throws Exception {
pool.getReadSession().close();
pool.closeAsync(new SpannerImpl.ClosedException()).get();
}
@Test
public void closeWhenSessionsActiveFinishes() throws Exception {
Session session = pool.getReadSession();
pool.closeAsync(new SpannerImpl.ClosedException()).get();
}
}