// Copyright (C) 2009 The Android Open Source Project
//
// 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.gerrit.httpd;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;
import com.google.inject.Singleton;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
/** Provides access to the {@code ReviewDb} DataSource. */
@Singleton
final class ReviewDbDataSourceProvider implements Provider<DataSource>,
LifecycleListener {
private DataSource ds;
@Override
public synchronized DataSource get() {
if (ds == null) {
ds = open();
}
return ds;
}
@Override
public void start() {
}
@Override
public synchronized void stop() {
if (ds != null) {
closeDataSource(ds);
}
}
private DataSource open() {
final String dsName = "java:comp/env/jdbc/ReviewDb";
try {
return (DataSource) new InitialContext().lookup(dsName);
} catch (NamingException namingErr) {
throw new ProvisionException("No DataSource " + dsName, namingErr);
}
}
private void closeDataSource(final DataSource ds) {
try {
Class<?> type = Class.forName("org.apache.commons.dbcp.BasicDataSource");
if (type.isInstance(ds)) {
type.getMethod("close").invoke(ds);
return;
}
} catch (Throwable bad) {
// Oh well, its not a Commons DBCP pooled connection.
}
try {
Class<?> type = Class.forName("com.mchange.v2.c3p0.DataSources");
if (type.isInstance(ds)) {
type.getMethod("destroy", DataSource.class).invoke(null, ds);
return;
}
} catch (Throwable bad) {
// Oh well, its not a c3p0 pooled connection.
}
}
}