MTWebClientManager.java

/*
 * This software Copyright by the RPTools.net development team, and licensed
 * under the GPL Version 3 or, at your option, any later version.
 *
 * MapTool 2 Source Code 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 source Code. If not, see <http://www.gnu.org/licenses/>
 */

package net.rptools.maptool.webapi;

import net.sf.json.JSONObject;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

public class MTWebClientManager {

	/**
	 * Create the singleton instance.
	 */
	private final static MTWebClientManager instance = new MTWebClientManager();

	/**
	 * The connected clients.
	 */
	private Set<MTWebSocket> clientSockets = Collections.synchronizedSet(new HashSet<MTWebSocket>());

	/**
	 * Create a new MTWebClientManager.
	 */
	private MTWebClientManager() {
	};

	/**
	 * Returns the singleton instance of MTWebClientManager.
	 *
	 * @return the instance of MTWebClientManager.
	 */
	public static MTWebClientManager getInstance() {
		return instance;
	}

	/**
	 * Return the sessions for the clients that are connected.
	 *
	 * @return the sessions for the clients that are connected.
	 */
	Collection<MTWebSocket> getClientSessions() {
		return Collections.unmodifiableCollection(clientSockets);
	}

	/**
	 * Sends a message to all sessions.
	 * @param messageType the type of the message.
	 * @param data the data to send
	 */
	public void sendToAllSessions(String messageType, JSONObject data) {
		for (MTWebSocket ws : clientSockets) {
			ws.sendMessage(messageType, data);
		}
	}

	/**
	 * Adds a client to the list of clients being managed.
	 * @param wcs The web socket of the client.
	 */
	void addClient(MTWebSocket wcs) {
		clientSockets.add(wcs);
		sendInitialInfo(wcs);
	}

	/**
	 * Removes a client from the list of clients being managed.
	 * @param wcs The web socket of the client.
	 */
	void removeClient(MTWebSocket wcs) {
		clientSockets.remove(wcs);
	}

	/**
	 * Send the initiative information to the specified client.
	 * @param wcs the web socket of the client.
	 */
	void sendInitialInfo(MTWebSocket wcs) {
		WebAppInitiative.getInstance().sendInitiative(wcs);
	}

}