NullTransactionId.java

/*
 * (C) 2007-2012 Alibaba Group Holding Limited.
 * 
 * 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.
 * Authors:
 *   wuhua <wq163@163.com> , boyan <killme2008@gmail.com>
 */
package com.taobao.metamorphosis.transaction;

/**
 * null transactionId object
 * 
 * @author boyan(boyan@taobao.com)
 * @date 2011-8-26
 * 
 */
public class NullTransactionId extends TransactionId {

    /**
     * 
     */
    private static final long serialVersionUID = -4764469311016709764L;


    NullTransactionId() {

    }


    @Override
    public boolean isNull() {
        return true;
    }


    @Override
    public boolean isXATransaction() {

        return false;
    }


    @Override
    public boolean isLocalTransaction() {

        return false;
    }


    @Override
    public String getTransactionKey() {
        return "null";
    }

}