/*
* Copyright 2004 Clinton Begin
*
* 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.ibatis.dao.engine.impl;
import com.ibatis.dao.client.Dao;
import com.ibatis.dao.client.DaoException;
import com.ibatis.dao.client.DaoTransaction;
import com.ibatis.dao.engine.transaction.DaoTransactionManager;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class DaoContext {
private String id;
private StandardDaoManager daoManager;
private DaoTransactionManager transactionManager;
private ThreadLocal transaction = new ThreadLocal();
private ThreadLocal state = new ThreadLocal();
private Map typeDaoImplMap = new HashMap();
public DaoContext() {
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public StandardDaoManager getDaoManager() {
return daoManager;
}
public void setDaoManager(StandardDaoManager daoManager) {
this.daoManager = daoManager;
}
public DaoTransactionManager getTransactionManager() {
return transactionManager;
}
public void setTransactionManager(DaoTransactionManager transactionManager) {
this.transactionManager = transactionManager;
}
public void addDao(DaoImpl daoImpl) {
if (typeDaoImplMap.containsKey(daoImpl.getDaoInterface())) {
throw new DaoException("More than one implementation for '" + daoImpl.getDaoInterface() + "' was configured. " +
"Only one implementation per context is allowed.");
}
typeDaoImplMap.put(daoImpl.getDaoInterface(), daoImpl);
}
public Dao getDao(Class iface) {
DaoImpl impl = (DaoImpl) typeDaoImplMap.get(iface);
if (impl == null) {
throw new DaoException("There is no DAO implementation found for " + iface + " in this context.");
}
return impl.getProxy();
}
public Iterator getDaoImpls() {
return typeDaoImplMap.values().iterator();
}
public DaoTransaction getTransaction() {
startTransaction();
return (DaoTransaction) transaction.get();
}
public void startTransaction() {
if (state.get() != DaoTransactionState.ACTIVE) {
DaoTransaction trans = transactionManager.startTransaction();
transaction.set(trans);
state.set(DaoTransactionState.ACTIVE);
daoManager.addContextInTransaction(this);
}
}
public void commitTransaction() {
DaoTransaction trans = (DaoTransaction) transaction.get();
if (state.get() == DaoTransactionState.ACTIVE) {
transactionManager.commitTransaction(trans);
state.set(DaoTransactionState.COMMITTED);
} else {
state.set(DaoTransactionState.INACTIVE);
}
}
public void endTransaction() {
DaoTransaction trans = (DaoTransaction) transaction.get();
if (state.get() == DaoTransactionState.ACTIVE) {
try {
transactionManager.rollbackTransaction(trans);
} finally {
state.set(DaoTransactionState.ROLLEDBACK);
transaction.set(null);
}
} else {
state.set(DaoTransactionState.INACTIVE);
transaction.set(null);
}
}
}