net.hasor.db.transaction.TranManager Maven / Gradle / Ivy
/*
* Copyright 2008-2009 the original author or authors.
*
* 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 net.hasor.db.transaction;
import net.hasor.db.datasource.ConnectionHolder;
import net.hasor.db.datasource.DataSourceManager;
import net.hasor.db.transaction.support.JdbcTransactionManager;
import javax.sql.DataSource;
import java.sql.Connection;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
/**
* 某一个数据源的事务管理器
* @version : 2013-10-30
* @author 赵永春 ([email protected])
*/
public class TranManager extends DataSourceManager {
private final static ThreadLocal> managerMap = ThreadLocal.withInitial(ConcurrentHashMap::new);
private final static ThreadLocal> currentMap = ThreadLocal.withInitial(ConcurrentHashMap::new);
public static ConnectionHolder currentConnectionHolder(DataSource dataSource) {
Objects.requireNonNull(dataSource);
Map localMap = currentMap.get();
ConnectionHolder holder = localMap.get(dataSource);
if (holder == null) {
holder = localMap.putIfAbsent(dataSource, newConnectionHolder(dataSource));
holder = localMap.get(dataSource);
}
return holder;
}
/** 该方法会拿到一个当前 Connection 的引用，在使用完毕之后必须要 close 它。否则会产生引用泄漏。 */
public static Connection currentConnection(DataSource dataSource) {
ConnectionHolder holder = currentConnectionHolder(dataSource);
return newProxyConnection(holder);
}
/**改变当前{@link ConnectionHolder}*/
protected static void currentConnection(DataSource dataSource, ConnectionHolder holder) {
Map localMap = currentMap.get();
if (holder == null) {
localMap.remove(dataSource);
} else {
localMap.put(dataSource, holder);
}
}
/**获取事务管理器*/
private static synchronized JdbcTransactionManager getTransactionManager(final DataSource dataSource) {
Objects.requireNonNull(dataSource);
Map localMap = managerMap.get();
JdbcTransactionManager manager = localMap.get(dataSource);
if (manager == null) {
manager = new JdbcTransactionManager(dataSource);
localMap.put(dataSource, manager);
}
return manager;
}
/**获取{@link TransactionManager}*/
public static synchronized TransactionManager getManager(DataSource dataSource) {
return getTransactionManager(dataSource);
}
/**获取{@link TransactionTemplate}*/
public static synchronized TransactionTemplate getTemplate(DataSource dataSource) {
JdbcTransactionManager manager = getTransactionManager(dataSource);
return manager.getTransactionTemplate();
}
}