LocalRequestProcessor.java

/**
Copyright (C) 2012  Delcyon, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.delcyon.capo.controller;

import java.util.HashMap;
import java.util.concurrent.locks.ReentrantLock;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import com.delcyon.capo.ContextThread;
import com.delcyon.capo.controller.elements.GroupElement;
import com.delcyon.capo.controller.server.ControllerClientRequestProcessor;

/**
 * @author jeremiah
 *
 */
public class LocalRequestProcessor extends ControllerClientRequestProcessor
{
    ReentrantLock lock = new ReentrantLock();
    
	public GroupElement process(Document localDocument) throws Exception
	{
		return process(localDocument.getDocumentElement(),null);		
	}
	
	public GroupElement process(Element localElement, HashMap<String, String> variableHashMap) throws Exception
	{
		GroupElement groupElement = new GroupElement();
		
		groupElement.init(localElement, null, null, this);
		if (variableHashMap != null)
		{
			groupElement.getGroup().setVariableHashMap(variableHashMap);
		}
		//process attribute values
		groupElement.getGroup().replaceVarsInAttributeValues(localElement);
		groupElement.getGroup().setVars(localElement);
		
		return process(groupElement);
	}
	
	public GroupElement process(GroupElement groupElement) throws Exception
	{
		ContextThread contextThread = null;
		if (Thread.currentThread() instanceof ContextThread)
		{
			contextThread = (ContextThread) Thread.currentThread();
			contextThread.setContext(groupElement);
			groupElement.processServerSideElement();
	        if (contextThread != null)
	        {
	            contextThread.setContext(null);
	        }
		}
		else
		{
		    lock.lock();
		    LocalContextThread localContextThread = new LocalContextThread(groupElement);
		    localContextThread.start();		    
		    lock.unlock();
		    while(localContextThread.isAlive())
		    {
		        Thread.sleep(500);
		    }
		}
		
		
		
		return groupElement;
	}

	private class LocalContextThread extends ContextThread
	{
	    private GroupElement groupElement;

        public LocalContextThread(GroupElement groupElement)
        {
            this.groupElement = groupElement;
            setContext(groupElement);
        }
        
        @Override
        public void run()
        {
            try
            {
                lock.lock();
                groupElement.processServerSideElement();
            }
            catch (Exception e)
            {                
                e.printStackTrace();
            }
            finally
            {
                lock.unlock();
            }
        }
        
        
	}
}