workflowengine.java

国外的一套开源CRM

/*
 * $Id: WorkflowEngine.java,v 1.3 2003/08/28 19:06:14 ajzeneski Exp $
 *
 * Copyright (c) 2001, 2002 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.workflow;

import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import javax.transaction.InvalidTransactionException;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;

import org.ofbiz.base.util.Debug;
import org.ofbiz.base.util.StringUtil;
import org.ofbiz.base.util.UtilDateTime;
import org.ofbiz.base.util.UtilMisc;
import org.ofbiz.entity.GenericEntityException;
import org.ofbiz.entity.GenericValue;
import org.ofbiz.entity.transaction.GenericTransactionException;
import org.ofbiz.entity.transaction.TransactionFactory;
import org.ofbiz.entity.transaction.TransactionUtil;
import org.ofbiz.service.GenericRequester;
import org.ofbiz.service.GenericResultWaiter;
import org.ofbiz.service.GenericServiceException;
import org.ofbiz.service.ModelService;
import org.ofbiz.service.ServiceDispatcher;
import org.ofbiz.service.engine.GenericEngine;
import org.ofbiz.service.job.AbstractJob;
import org.ofbiz.service.job.Job;
import org.ofbiz.service.job.JobManagerException;

/**
 * WorkflowEngine - Workflow Service Engine
 *
 * @author     <a href="mailto:[e-mail]">Andy Zeneski</a>
 * @version    $Revision: 1.3 $
 * @since      2.0
 */
public class WorkflowEngine implements GenericEngine {

    public static final String module = WorkflowEngine.class.getName();

    protected ServiceDispatcher dispatcher;
     
    public WorkflowEngine(ServiceDispatcher dispatcher) {
        this.dispatcher = dispatcher;      
    }
       
    /**
     * @see org.ofbiz.service.engine.GenericEngine#runSync(java.lang.String, org.ofbiz.service.ModelService, java.util.Map)
     */
    public Map runSync(String localName, ModelService modelService, Map context) throws GenericServiceException {
        GenericResultWaiter waiter = new GenericResultWaiter();
        runAsync(localName, modelService, context, waiter, false);
        return waiter.waitForResult();
    }
   
    /**
     * @see org.ofbiz.service.engine.GenericEngine#runSyncIgnore(java.lang.String, org.ofbiz.service.ModelService, java.util.Map)
     */
    public void runSyncIgnore(String localName, ModelService modelService, Map context) throws GenericServiceException {
        runAsync(localName, modelService, context, null, false);
    }
   
    /**
     * @see org.ofbiz.service.engine.GenericEngine#runAsync(java.lang.String, org.ofbiz.service.ModelService, java.util.Map, boolean)
     */
    public void runAsync(String localName, ModelService modelService, Map context, boolean persist) throws GenericServiceException {
        runAsync(localName, modelService, context, null, persist);
    }
   
    /**
     * @see org.ofbiz.service.engine.GenericEngine#runAsync(java.lang.String, org.ofbiz.service.ModelService, java.util.Map, org.ofbiz.service.GenericRequester, boolean)
     */
    public void runAsync(String localName, ModelService modelService, Map context, GenericRequester requester, boolean persist) throws GenericServiceException {       
        // Suspend the current transaction
        TransactionManager tm = TransactionFactory.getTransactionManager();
        if (tm == null) {
            throw new GenericServiceException("Cannot get the transaction manager; cannot run persisted services.");
        }

        Transaction parentTrans = null;
        boolean beganTransaction = false;
        try {
            try {
                parentTrans = tm.suspend();                
                beganTransaction = TransactionUtil.begin();
                //Debug.logInfo("Suspended transaction; began new: " + beganTransaction, module);
            } catch (SystemException se) {
                Debug.logError(se, "Cannot suspend transaction: " + se.getMessage(), module);
            } catch (GenericTransactionException e) {
                Debug.logError(e, "Cannot begin nested transaction: " + e.getMessage(), module);
            }
            
            // Build the requester
            WfRequester req = null;
            try {
                req = WfFactory.getWfRequester();
            } catch (WfException e) {
                try {
                    TransactionUtil.rollback(beganTransaction);
                } catch (GenericTransactionException gte) {
                    Debug.logError(gte, "Unable to rollback nested exception.", module);
                }
                throw new GenericServiceException(e.getMessage(), e);
            }

            // Get the package and process ID::VERSION
            String packageId = this.getSplitPosition(modelService.location, 0);
            String packageVersion = this.getSplitPosition(modelService.location, 1);
            String processId = this.getSplitPosition(modelService.invoke, 0);
            String processVersion = this.getSplitPosition(modelService.invoke, 1);

            // Build the process manager
            WfProcessMgr mgr = null;
            try {
                mgr = WfFactory.getWfProcessMgr(dispatcher.getDelegator(), packageId, packageVersion, processId, processVersion);
            } catch (WfException e) {
                Debug.logError(e, "Process manager error", module);
                try {
                    TransactionUtil.rollback(beganTransaction);
                } catch (GenericTransactionException gte) {
                    Debug.logError(gte, "Unable to rollback nested exception.", module);
                }
                throw new GenericServiceException(e.getMessage(), e);
            } catch (Exception e) {
                Debug.logError(e, "Un-handled process manager error", module);
                throw new GenericServiceException(e.getMessage(), e);
            }

            // Create the process
            WfProcess process = null;
            try {
                process = mgr.createProcess(req);
            } catch (NotEnabled ne) {
                try {
                    TransactionUtil.rollback(beganTransaction);
                } catch (GenericTransactionException gte) {
                    Debug.logError(gte, "Unable to rollback nested exception.", module);
                }
                throw new GenericServiceException(ne.getMessage(), ne);
            } catch (InvalidRequester ir) {
                try {
                    TransactionUtil.rollback(beganTransaction);
                } catch (GenericTransactionException gte) {
                    Debug.logError(gte, "Unable to rollback nested exception.", module);
                }