// Copyright 2014 Google Inc.
//
// 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.enterprise.connector.util.database;
import static org.easymock.EasyMock.createMock;
import static org.easymock.EasyMock.expect;
import static org.easymock.EasyMock.replay;
import static org.easymock.EasyMock.verify;
import org.h2.jdbcx.JdbcDataSource;
import junit.framework.TestCase;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
public class DatabaseConnectionPoolTest extends TestCase {
public void testConstructor() {
DataSource ds = createMock(DataSource.class);
new DatabaseConnectionPool(ds);
}
public void testGetConnection() throws SQLException {
DataSource ds = createMock(DataSource.class);
Connection c1 = createMock(Connection.class);
Connection c2 = createMock(Connection.class);
Connection c3 = createMock(Connection.class);
expect(ds.getConnection()).andReturn(c1).andReturn(c2).andReturn(c3);
replay(ds, c1, c2, c3);
DatabaseConnectionPool pool = new DatabaseConnectionPool(ds);
assertEquals(c1, pool.getConnection());
assertEquals(c2, pool.getConnection());
assertEquals(c3, pool.getConnection());
verify(ds, c1, c2, c3);
}
public void testReleaseConnection() throws SQLException {
DataSource ds = createMock(DataSource.class);
Connection c1 = createMock(Connection.class);
Connection c2 = createMock(Connection.class);
Connection c3 = createMock(Connection.class);
Connection c4 = createMock(Connection.class);
expect(ds.getConnection()).andReturn(c1).andReturn(c2).andReturn(c3)
.andReturn(c4);
expect(c2.isValid(1)).andReturn(true);
expect(c3.isValid(1)).andReturn(true);
replay(ds, c1, c2, c3, c4);
DatabaseConnectionPool pool = new DatabaseConnectionPool(ds);
assertEquals(c1, pool.getConnection());
assertEquals(c2, pool.getConnection());
assertEquals(c3, pool.getConnection());
pool.releaseConnection(c3);
pool.releaseConnection(c2);
// Test LIFO
assertEquals(c2, pool.getConnection());
assertEquals(c3, pool.getConnection());
// This should fetch new connection
assertEquals(c4, pool.getConnection());
verify(ds, c1, c2, c3, c4);
}
public void testCloseConnections() throws SQLException {
DataSource ds = createMock(DataSource.class);
Connection c1 = createMock(Connection.class);
Connection c2 = createMock(Connection.class);
Connection c3 = createMock(Connection.class);
expect(ds.getConnection()).andReturn(c1).andReturn(c2).andReturn(c3);
c1.close();
c2.close();
replay(ds, c1, c2, c3);
DatabaseConnectionPool pool = new DatabaseConnectionPool(ds);
assertEquals(c1, pool.getConnection());
assertEquals(c2, pool.getConnection());
assertEquals(c3, pool.getConnection());
// Only c1 and c2 are released back to pool. close() should be executed
// only on c1 and c2
pool.releaseConnection(c1);
pool.releaseConnection(c2);
pool.closeConnections();
verify(ds, c1, c2, c3);
}
public void testValidConnection() throws SQLException {
DataSource ds = createMock(DataSource.class);
Connection alive = createMock(Connection.class);
Connection deadAfterSomeTime = createMock(Connection.class);
expect(ds.getConnection()).andReturn(alive).andReturn(deadAfterSomeTime);
expect(alive.isValid(1)).andReturn(true);
expect(deadAfterSomeTime.isValid(1)).andReturn(false);
deadAfterSomeTime.close();
replay(ds, alive, deadAfterSomeTime);
DatabaseConnectionPool pool = new DatabaseConnectionPool(ds);
assertEquals(alive, pool.getConnection());
assertEquals(deadAfterSomeTime, pool.getConnection());
pool.releaseConnection(alive);
// release dead connection to connection pool.
pool.releaseConnection(deadAfterSomeTime);
// Pool should return alive connection and close dead connection.
assertEquals(alive, pool.getConnection());
verify(ds, alive, deadAfterSomeTime);
}
public void testConnectionPoolwithH2() throws SQLException {
// Setup in-memory H2 JDBC DataSource;
JdbcDataSource ds = new JdbcDataSource();
ds.setURL("jdbc:h2:mem:testdb");
ds.setUser("sa");
ds.setPassword("sa");
DatabaseConnectionPool pool = new DatabaseConnectionPool(ds);
//Test getConnection
Connection c = pool.getConnection();
assertTrue(c.isValid(1));
//Test release connection
pool.releaseConnection(c);
Connection newOne = pool.getConnection();
assertTrue(newOne.isValid(1));
// verify same released connection is returned.
assertEquals(c, newOne);
//verify close connection.
pool.releaseConnection(newOne);
pool.closeConnections();
assertTrue(newOne.isClosed());
}
}