launchaction.java

日常的办公系统 应用工作流框架等增加员工的基本信息、培训信息、奖罚信息、薪资信息

/*
 * Copyright (c) 2005, John Mettraux, OpenWFE.org
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 * . Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.  
 * 
 * . Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * 
 * . Neither the name of the "OpenWFE" nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: LaunchAction.java,v 1.19 2005/07/14 15:04:14 jmettraux Exp $
 */

//
// LaunchAction.java
//
// [e-mail]
//
// generated with 
// jtmpl 1.0.04 31.10.2002 John Mettraux ([e-mail])
//

package openwfe.org.wlactions;

import javax.security.auth.Subject;

import openwfe.org.ApplicationContext;
import openwfe.org.engine.workitem.LaunchItem;
import openwfe.org.engine.dispatch.DispatchingException;
import openwfe.org.engine.participants.Participant;
import openwfe.org.engine.participants.ParticipantMap;
import openwfe.org.worklist.auth.LaunchPermission;


/**
 * The action of launching a flow
 *
 * <p><font size=2>CVS Info :
 * <br>$Author: jmettraux $
 * <br>$Date: 2005/07/14 15:04:14 $
 * <br>$Id: LaunchAction.java,v 1.19 2005/07/14 15:04:14 jmettraux Exp $ </font>
 *
 * @author [e-mail]
 */
public class LaunchAction

    implements java.security.PrivilegedExceptionAction

{

    //
    // FIELDS

    protected ApplicationContext worklistContext = null;
    protected Subject subject = null;
    protected String engineId = null;
    protected LaunchItem item = null;

    //
    // CONSTRUCTORS

    public LaunchAction 
        (final ApplicationContext worklistContext, 
         final Subject subject, 
         final String engineId,
         final LaunchItem item)
    {
        this.worklistContext = worklistContext;
        this.subject = subject;

        this.engineId = engineId;
        this.item = item;
    }

    //
    // METHODS

    public Object run () 
        throws DispatchingException
    {

        if (this.item.getWorkflowDefinitionUrl() == null)
        {
            throw new DispatchingException
                ("LaunchItem with workflowDefinitionUrl field not set. "+
                 "Cannot launch.");
        }

        //
        // security control is performed here...

        java.security.AccessController.checkPermission
            (LaunchPermission.newLaunchPermission
                (determinePermissionName()));

        //
        // find participant and dispatch
        
        final ParticipantMap pMap = openwfe.org.engine.Definitions
            .getParticipantMap(this.worklistContext);

        final Participant p = pMap.get(this.engineId);

        if (p == null)
        {
            throw new DispatchingException 
                ("Cannot launch flow on unknown engine '"+this.engineId+"'");
        }

        return p.dispatch(this.item);
    }

    protected String determinePermissionName ()
    {
        StringBuffer sb = new StringBuffer();

        sb.append(this.engineId);
        sb.append("::");
        sb.append(this.item.getWorkflowDefinitionUrl());

        return sb.toString();
    }

}