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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing,
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package org.apache.cayenne.datasource;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.cayenne.unit.di.server.CayenneProjects;
import org.apache.cayenne.unit.di.server.UseServerRuntime;
import org.junit.Test;
@UseServerRuntime(CayenneProjects.TESTMAP_PROJECT)
public class PoolingDataSourceIT extends BasePoolingDataSourceIT {
@Test(expected = UnsupportedOperationException.class)
public void testGetConnectionWithUserName() throws Exception {
dataSource.getConnection("user", "password");
}
@Test
public void testGetConnection_AutoCommit() throws Exception {
assertTrue(dataSource.getMaxConnections() > 0);
List<Connection> connections = new ArrayList<Connection>();
try {
for (int i = 0; i < dataSource.getMaxConnections(); i++) {
Connection c = dataSource.getConnection();
assertTrue("Failed to reset connection state", c.getAutoCommit());
connections.add(c);
}
for (Connection c : connections) {
c.setAutoCommit(false);
c.close();
}
for (int i = 0; i < dataSource.getMaxConnections(); i++) {
Connection c = dataSource.getConnection();
// presumably this pass through the pool should return existing
// connections
assertTrue(connections.contains(c));
assertTrue("Failed to reset connection state for reused connection", c.getAutoCommit());
}
} finally {
for (Connection c : connections) {
try {
c.close();
} catch (SQLException e) {
}
}
}
}
@Test
public void testGetConnection_FailOnFull() throws Exception {
assertTrue(dataSource.getMaxConnections() > 0);
List<Connection> connections = new ArrayList<Connection>();
try {
for (int i = 0; i < dataSource.getMaxConnections(); i++) {
connections.add(dataSource.getConnection());
}
long t0 = System.currentTimeMillis();
try {
dataSource.getConnection();
fail("Opening more connections than the pool allows succeeeded");
} catch (SQLException e) {
// expected, but check if we waited sufficiently
long t1 = System.currentTimeMillis();
assertTrue(t1 - t0 >= QUEUE_WAIT_TIME);
}
} finally {
for (Connection c : connections) {
try {
c.close();
} catch (SQLException e) {
}
}
}
}
@Test
public void testGetConnection() throws Exception {
assertEquals(2, dataSource.poolSize());
assertEquals(2, dataSource.availableSize());
Connection c1 = dataSource.getConnection();
assertEquals(2, dataSource.poolSize());
assertEquals(1, dataSource.availableSize());
Connection c2 = dataSource.getConnection();
assertEquals(2, dataSource.poolSize());
assertEquals(0, dataSource.availableSize());
Connection c3 = dataSource.getConnection();
assertEquals(3, dataSource.poolSize());
assertEquals(0, dataSource.availableSize());
c1.close();
assertEquals(3, dataSource.poolSize());
assertEquals(1, dataSource.availableSize());
c2.close();
assertEquals(3, dataSource.poolSize());
assertEquals(2, dataSource.availableSize());
c3.close();
assertEquals(3, dataSource.poolSize());
assertEquals(3, dataSource.availableSize());
}
@Test
public void testGetConnection_BeforeScopeEnd() throws Exception {
assertEquals(2, dataSource.poolSize());
assertEquals(2, dataSource.availableSize());
dataSource.close();
assertEquals(0, dataSource.poolSize());
assertEquals(0, dataSource.availableSize());
}
@Test
public void testGetConnection_Concurrent() {
PoolTask[] tasks = new PoolTask[2];
for (int i = 0; i < tasks.length; i++) {
tasks[i] = new PoolTask();
}
ExecutorService executor = Executors.newFixedThreadPool(tasks.length);
for (int j = 0; j < 100; j++) {
for (PoolTask task : tasks) {
executor.submit(task);
}
}
// check for completion or deadlock
executor.shutdown();
try {
// normally this completes in less than 2 seconds. If it takes 30
// then it failed.
boolean didFinish = executor.awaitTermination(30, TimeUnit.SECONDS);
if (!didFinish) {
fail("Connection pool either deadlocked or contended over the lock too long.");
}
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
for (PoolTask task : tasks) {
assertEquals(100, task.i.get());
}
}
class PoolTask implements Runnable {
AtomicInteger i = new AtomicInteger();
@Override
public void run() {
try {
Connection c = dataSource.getConnection();
try {
Statement st = c.createStatement();
try {
ResultSet rs = st.executeQuery("SELECT ARTIST_ID FROM ARTIST");
try {
rs.next();
} finally {
rs.close();
}
} finally {
st.close();
}
} finally {
c.close();
}
// increment only after success
i.incrementAndGet();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}