VirtualEndpointInstaller.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt 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.restcomm.media.control.mgcp.endpoint.factory;

import java.lang.reflect.Constructor;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.log4j.Logger;
import org.restcomm.media.control.mgcp.controller.Controller;
import org.restcomm.media.control.mgcp.endpoint.naming.EndpointNameGenerator;
import org.restcomm.media.core.Server;
import org.restcomm.media.spi.Endpoint;
import org.restcomm.media.spi.EndpointInstaller;

/**
 * Endpoint installer is used for automatic creation and installation of
 * endpoints.
 * 
 * It uses three parameters: the name pattern, class name and configuration
 * 
 * @author yulian oifa
 */
public class VirtualEndpointInstaller implements EndpointInstaller {
    
    private static final Logger logger = Logger.getLogger(VirtualEndpointInstaller.class);

	private String namePattern;
	private String endpointClass;
	protected Integer initialSize;

	protected final EndpointNameGenerator nameParser;

	protected AtomicInteger lastEndpointID = new AtomicInteger(1);
	
	protected Controller controller;

	/**
	 * Creates new endpoint installer.
	 */
	public VirtualEndpointInstaller() {
		nameParser = new EndpointNameGenerator();
	}

	/**
	 * Gets the pattern used for generating endpoint name.
	 * 
	 * @return text pattern
	 */
	public String getNamePattern() {
		return namePattern;
	}

	/**
	 * Sets the pattern used for generating endpoint name.
	 * 
	 * @param namePattern
	 *            the pattern text.
	 */
	public void setNamePattern(String namePattern) {
		this.namePattern = namePattern;
	}

	/**
	 * Gets the name of the class implementing endpoint.
	 * 
	 * @return the fully qualified class name.
	 */
	public String getEndpointClass() {
		return this.endpointClass;
	}

	/**
	 * Sets the name of the class implementing endpoint.
	 * 
	 * @param endpointClass
	 *            the fully qualified class name.
	 */
	public void setEndpointClass(String endpointClass) {
		this.endpointClass = endpointClass;
	}

	/**
	 * Gets the initial size of endpoints pool
	 * 
	 * @return initial size
	 */
	public Integer getInitialSize() {
		return this.initialSize;
	}

	/**
	 * Sets the initial size of endpoints pool
	 * 
	 * @param initial
	 *            size
	 */
	public void setInitialSize(Integer initialSize) {
		this.initialSize = initialSize;
	}
	
	public void setController(Controller controller) {
        this.controller = controller;
    }

	@Override
	public void install() {
		for (int i = 0; i < initialSize; i++) {
			newEndpoint();
		}
	}

	@Override
	public void newEndpoint() {
		ClassLoader loader = Server.class.getClassLoader();
		nameParser.setPattern(namePattern);
		try {
			Constructor<?> constructor = loader.loadClass(this.endpointClass).getConstructor(String.class);
			Endpoint endpoint = (Endpoint) constructor.newInstance(namePattern + lastEndpointID.getAndIncrement());
			controller.install(endpoint, this);
		} catch (Exception e) {
			logger.error("Couldn't instantiate endpoint", e);
		}
	}

	@Override
	public boolean canExpand() {
		return true;
	}

	@Override
	public void uninstall() {
	}

}