/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.deployment.spi;

import java.io.File;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.MalformedURLException;
import java.net.URL;

import javax.enterprise.deploy.shared.CommandType;
import javax.enterprise.deploy.shared.StateType;
import javax.enterprise.deploy.spi.TargetModuleID;
import javax.enterprise.deploy.spi.status.ProgressObject;

import org.jboss.deployment.spi.status.ProgressObjectImpl;
import org.jboss.logging.Logger;

/**
 * A thread that deployes the given deployment on all targets contained in the
 * progress object. It sends events to the progress object.
 * 
 * @author thomas.diesler@jboss.org
 * @version $Revision: 81011 $
 */
public class DeploymentWorker extends Thread
{
   // deployment logging
   private static final Logger log = Logger.getLogger(DeploymentWorker.class);

   private ProgressObjectImpl progress;

   public DeploymentWorker(ProgressObject progress)
   {
      this.progress = (ProgressObjectImpl)progress;
   }

   /**
    * Deploy the module on each given target
    */
   public void run()
   {
      log.trace("Begin run");
      CommandType cmdType = progress.getDeploymentStatus().getCommand();
      TargetModuleID[] modules = progress.getResultTargetModuleIDs();
      for (int i = 0; i < modules.length; i++)
      {
         TargetModuleID moduleid = modules[i];
         JBossTarget target = (JBossTarget)moduleid.getTarget();
         try
         {
            progress.sendProgressEvent(StateType.RUNNING, "Operation " + cmdType + " started", moduleid);
            if (cmdType == CommandType.DISTRIBUTE)
            {
               target.deploy(moduleid);
               deleteDeployment(moduleid);
            }
            else if (cmdType == CommandType.START)
            {
               target.start(moduleid);
            }
            else if (cmdType == CommandType.STOP)
            {
               target.stop(moduleid);
            }
            else if (cmdType == CommandType.UNDEPLOY)
            {
               target.undeploy(moduleid);
               deleteDeployment(moduleid);
            }
            progress.sendProgressEvent(StateType.COMPLETED, "Operation " + cmdType + " completed", moduleid);
         }
         catch (Exception e)
         {
            String message = "Operation " + cmdType + " failed on target " + target;
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            pw.println(message);
            e.printStackTrace(pw);
            pw.close();
            message = sw.toString();
            progress.sendProgressEvent(StateType.FAILED, message, moduleid);
            log.error(message, e);
         }
      }
      log.trace("End run");
   }

   private void deleteDeployment(TargetModuleID moduleid) throws MalformedURLException
   {
      File deployment = new File(new URL(moduleid.getModuleID()).getPath());
      if (deployment.exists())
      {
         if (!deployment.delete())
         {
            log.warn("Cannot delete deployment file " + deployment + ", will be deleted on exit");
            deployment.deleteOnExit();
         }
      }
      else
      {
         log.error("Deployment does not exist: " + deployment);
      }
   }
}