/*
 *  Copyright 1999-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/* @version $Id: AloneService.java 155409 2005-02-26 12:57:06Z dirkv $ */

import java.io.*;
import java.net.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;

import org.apache.commons.collections.ExtendedProperties;
import java.io.IOException;
import java.util.Iterator;

/*
 * That is like the ServiceDaemon but it does used the interface.
 */
public class AloneService {

    private ExtendedProperties prop = null;
    private Process proc[] = null;
    private ServiceDaemonReadThread readout[] = null;
    private ServiceDaemonReadThread readerr[] = null;

    protected void finalize() {
        System.err.println("ServiceDaemon: instance "+this.hashCode()+
                           " garbage collected");
    }

    /**
     * init and destroy were added in jakarta-tomcat-daemon.
     */
    public void init(String[] arguments)
    throws Exception {
        /* Set the err */
        System.setErr(new PrintStream(new FileOutputStream(new File("/ServiceDaemon.err"),true)));
        System.err.println("ServiceDaemon: instance "+this.hashCode()+
                           " init");

        /* read the properties file */
        prop = new ExtendedProperties("startfile");

        /* create an array to store the processes */
	int i=0;
        for (Iterator e = prop.getKeys(); e.hasNext() ;) {
            e.next();
            i++;
        }
        System.err.println("ServiceDaemon: init for " + i + " processes");
        proc = new Process[i];
        readout = new ServiceDaemonReadThread[i];
        readerr = new ServiceDaemonReadThread[i];
        for (i=0;i<proc.length;i++) {
            proc[i] = null;
            readout[i] = null;
            readerr[i] = null;
        }

        System.err.println("ServiceDaemon: init done ");

    }

    public void start() {
        /* Dump a message */
        System.err.println("ServiceDaemon: starting");

        /* Start */
	int i=0;
        for (Iterator e = prop.getKeys(); e.hasNext() ;) {
           String name = (String) e.next();
           System.err.println("ServiceDaemon: starting: " + name + " : " + prop.getString(name));
           try {
               proc[i] = Runtime.getRuntime().exec(prop.getString(name));
           } catch(Exception ex) {
               System.err.println("Exception: " + ex);
           }
           /* Start threads to read from Error and Out streams */
           readerr[i] =
               new ServiceDaemonReadThread(proc[i].getErrorStream());
           readout[i] =
               new ServiceDaemonReadThread(proc[i].getInputStream());
           readerr[i].start();
           readout[i].start();
           i++;
        }
    }

    public void stop()
    throws IOException, InterruptedException {
        /* Dump a message */
        System.err.println("ServiceDaemon: stopping");

        for (int i=0;i<proc.length;i++) {
            if ( proc[i]==null)
               continue;
            proc[i].destroy();
            try {
                proc[i].waitFor();
            } catch(InterruptedException ex) {
                System.err.println("ServiceDaemon: exception while stopping:" +
                                    ex);
            }
        }

        System.err.println("ServiceDaemon: stopped");
    }

    public void destroy() {
        System.err.println("ServiceDaemon: instance "+this.hashCode()+
                           " destroy");
    }

}