Quadcap Embeddable Server

com/quadcap/server/ServiceContainer.java

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package com.quadcap.server;

/* Copyright 2000 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileReader;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Properties;

import org.xml.sax.InputSource;

import com.quadcap.util.ConfigString;
import com.quadcap.util.Debug;

/**
 * Main service container object.
 *
 * @author Stan Bailes
 */
public class ServiceContainer {
    static HashMap              services                = new HashMap();

    /**
     * Default constructor
     */
    public ServiceContainer() {}

    /**
     * Add the service with the specified name, class name, and config
     * file.
     *
     * @param Exception may be thrown during service construction or
     * initialization
     */
    public void addService(String serviceName, String serviceClass,
                           Properties serviceProps)
        throws Exception
    {
        Class sc = Class.forName(serviceClass);
        Service service = (Service)sc.newInstance();
        Debug.println(0, "Starting service: " + serviceName + ", config = " +
                      serviceProps + ", service = " + service);
        serviceProps.put("service.name", serviceName);
        service.init(this, serviceProps);
        services.put(serviceName, service);
    }

    /**
     * Parse the server.xml file and load all the services defined therein.
     */
    public void init(String configFile) throws Exception {
        ServerConfigParser p = new ServerConfigParser(this);
        p.parse(configFile);
    }

    /**
     * Return the service with the specified name
     *
     * @param name
     */
    public static Service getService(String name) {
        return (Service)services.get(name);
    }

    /**
     * Return an iterator of service names
     */
    public Iterator serviceNames() {
        return services.keySet().iterator();
    }

    /**
     * Main program: find config file and point the container at it.
     */
    public static void main(String[] args) {
        try {
            ServiceContainer c = new ServiceContainer();
            ConfigString cs = ConfigString.find("server.config", "server.xml");
            c.init(cs.toString());
        } catch (Exception e) {
            Debug.print(e);
        }
    }
}