/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.ambari.scom;
import org.apache.ambari.server.configuration.Configuration;
import org.apache.ambari.server.controller.jdbc.ConnectionFactory;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/**
* Factory for the sink database connection.
*/
public class SinkConnectionFactory implements ConnectionFactory {
/**
* The database URL.
*/
private String databaseUrl;
/**
* The database driver.
*/
private String databaseDriver;
/**
* Indicates whether or not the driver has been initialized
*/
private boolean connectionInitialized = false;
/**
* The singleton.
*/
private static SinkConnectionFactory singleton = new SinkConnectionFactory();
// ----- Constants ---------------------------------------------------------
protected static final String SCOM_SINK_DB_URL = "scom.sink.db.url";
protected static final String SCOM_SINK_DB_DRIVER = "scom.sink.db.driver";
// ----- Constructor -------------------------------------------------------
protected SinkConnectionFactory() {
}
// ----- SinkConnectionFactory ---------------------------------------------
/**
* Initialize with the given configuration.
*
* @param configuration the configuration
*/
public void init(Configuration configuration) {
this.databaseUrl = configuration.getProperty(SCOM_SINK_DB_URL);
this.databaseDriver = configuration.getProperty(SCOM_SINK_DB_DRIVER);
}
/**
* Get the singleton instance.
*
* @return the singleton instance
*/
public static SinkConnectionFactory instance() {
return singleton;
}
/**
* Get the database URL.
*
* @return the database URL
*/
public String getDatabaseUrl() {
return databaseUrl;
}
/**
* Get the database driver.
*
* @return the database driver
*/
public String getDatabaseDriver() {
return databaseDriver;
}
// ----- ConnectionFactory -----------------------------------------------
@Override
public Connection getConnection() throws SQLException {
synchronized (this) {
if (!connectionInitialized) {
connectionInitialized = true;
try {
Class.forName(databaseDriver);
} catch (ClassNotFoundException e) {
throw new SQLException("Can't load the driver class.", e);
}
}
}
return DriverManager.getConnection(databaseUrl);
}
}