transactionbegin.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

/*
 * $Id: TransactionBegin.java 5462 2005-08-05 18:35:48Z jonesde $
 *
 *  Copyright (c) 2001-2005 The Open For Business Project - www.ofbiz.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a
 *  copy of this software and associated documentation files (the "Software"),
 *  to deal in the Software without restriction, including without limitation
 *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
 *  and/or sell copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included
 *  in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 *  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 *  OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 *  THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.ofbiz.minilang.method.entityops;

import org.ofbiz.base.util.Debug;
import org.ofbiz.entity.transaction.GenericTransactionException;
import org.ofbiz.entity.transaction.TransactionUtil;
import org.ofbiz.minilang.SimpleMethod;
import org.ofbiz.minilang.method.ContextAccessor;
import org.ofbiz.minilang.method.MethodContext;
import org.ofbiz.minilang.method.MethodOperation;
import org.w3c.dom.Element;

/**
 * Begins a transaction if one is not already in place; if does begin one puts true in the began-transaction-name env variable, otherwise it returns false.
 *
 * @author     <a href="mailto:[e-mail]">David E. Jones</a>
 * @version    $Rev: 5462 $
 * @since      2.0
 */
public class TransactionBegin extends MethodOperation {
    
    public static final String module = TransactionBegin.class.getName();
    
    ContextAccessor beganTransactionAcsr;

    public TransactionBegin(Element element, SimpleMethod simpleMethod) {
        super(element, simpleMethod);
        beganTransactionAcsr = new ContextAccessor(element.getAttribute("began-transaction-name"), "beganTransaction");
    }

    public boolean exec(MethodContext methodContext) {
        boolean beganTransaction = false;
        try {
            beganTransaction = TransactionUtil.begin();
        } catch (GenericTransactionException e) {
            Debug.logError(e, "Could not begin transaction in simple-method, returning error.", module);
            
            String errMsg = "ERROR: Could not complete the " + simpleMethod.getShortDescription() + " process [error beginning a transaction: " + e.getMessage() + "]";
            methodContext.setErrorReturn(errMsg, simpleMethod);
            return false;
        }
        
        beganTransactionAcsr.put(methodContext, new Boolean(beganTransaction));
        return true;
    }

    public String rawString() {
        // TODO: something more than the empty tag
        return "<transaction-begin/>";
    }
    public String expandedString(MethodContext methodContext) {
        // TODO: something more than a stub/dummy
        return this.rawString();
    }
}