/** * * Copyright 2014 The Darks ORM Project (Liu lihua) * * 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 darks.orm.core.config; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.sql.DataSource; public class JndiConfiguration extends DataSourceConfiguration { private DataSource ds; private String jndiPoolName; private volatile boolean isInited = false; private Lock lock = new ReentrantLock(); public JndiConfiguration() { } public DataSource getDataSource() throws ClassNotFoundException { if (!isInited) { lock.lock(); try { if (!isInited) { try { Context initContext = new InitialContext(); ds = (DataSource)initContext.lookup(jndiPoolName); isInited = true; } catch (NamingException e) { e.printStackTrace(); } } } finally { lock.unlock(); } } return ds; } @Override public void destroy() { ds = null; isInited = false; } public String getJndiPoolName() { return jndiPoolName; } public void setJndiPoolName(String jndiPoolName) { this.jndiPoolName = jndiPoolName; } }