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/*
 * Copyright 2015-2017 GenerallyCloud.com
 *  
 * 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.generallycloud.baseio.container.jms.server;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;

import com.generallycloud.baseio.container.jms.Message;
import com.generallycloud.baseio.container.jms.Transaction;

public class TransactionSection implements Transaction {

	private List	messages	= new ArrayList();
	private MQContext		context	;
	private AtomicBoolean	finish	= new AtomicBoolean(false);

	public TransactionSection(MQContext context) {
		this.context = context;
	}

	@Override
	public boolean beginTransaction() {
		return false;
	}

	@Override
	public boolean commit() {
		if (finish.compareAndSet(false, true)) {
			this.messages.clear();
			return true;
		}
		return false;
	}

	@Override
	public boolean rollback(){
		if (finish.compareAndSet(false, true)) {
			MQContext context = this.context;
			for (Message message : messages) {
				context.offerMessage(message);
			}
			return true;
		}
		return false;
	}

	public void offerMessage(Message message) {
		if (finish.get()) {
			return;
		}
		this.messages.add(message);
	}

}