/**
* Alipay.com Inc.
* Copyright (c) 2004-2012 All Rights Reserved.
*/
package com.alipay.zdal.datasource.tm;
import com.alipay.zdal.datasource.transaction.Transaction;
/**
* Implementations of this interface are used for getting
* a transaction propagation context at the client-side.
* We need a specific implementation of this interface for
* each kind of DTM we are going to interoperate with. (So
* we may have 20 new classes if we are going to interoperate
* with 20 different kinds of distributed transaction
* managers.)
* The reason for having the methods in this interface return
* Object is that we do not really know what kind of transaction
* propagation context is returned.
*
* @author ����
* @version $Id: TransactionPropagationContextFactory.java, v 0.1 2014-1-6 ����05:48:38 Exp $
*/
public interface TransactionPropagationContextFactory {
/**
* Return a transaction propagation context for the transaction
* currently associated with the invoking thread, or <code>null</code>
* if the invoking thread is not associated with a transaction.
*/
public Object getTransactionPropagationContext();
/**
* Return a transaction propagation context for the transaction
* given as an argument, or <code>null</code>
* if the argument is <code>null</code> or of a type unknown to
* this factory.
*/
public Object getTransactionPropagationContext(Transaction tx);
}