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- /*
- * Copyright (c) 2006-2017 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
- * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
- * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
- package com.dmdirc.addons.ui_web2;
-
- import com.dmdirc.events.eventbus.EventBus;
-
- import java.io.IOException;
- import java.util.Collection;
- import java.util.concurrent.CopyOnWriteArrayList;
- import java.util.concurrent.atomic.AtomicBoolean;
-
- import javax.inject.Inject;
- import javax.inject.Singleton;
-
- import org.eclipse.jetty.websocket.api.Session;
-
- /**
- * Manages events raised by the {@link WebSocketHandler}.
- *
- * <p>This serves as a bridge between the {@link WebSocketHandler}, which cannot have dependencies
- * passed in sanely due to the framework, and the rest of the plugin/client.
- */
- @Singleton
- public class WebSocketController {
-
- private final Collection<Session> sessions = new CopyOnWriteArrayList<>();
- private final Object sessionLock = new Object();
- private final AtomicBoolean subscribed = new AtomicBoolean(false);
- private final EventBus eventBus;
- private final InitialStateProducer initialStateProducer;
-
- @Inject
- public WebSocketController(final EventBus eventBus, final InitialStateProducer initialStateProducer) {
- this.eventBus = eventBus;
- this.initialStateProducer = initialStateProducer;
- }
-
- /**
- * Handles a session connected event raised by a {@link WebSocketHandler}.
- *
- * @param session The session that is now connected.
- */
- void sessionConnected(final Session session) {
- synchronized (sessionLock) {
- if (!subscribed.getAndSet(true)) {
- eventBus.subscribe(this);
- }
-
- sessions.add(session);
- }
-
- sendMessage(session, initialStateProducer.getInitialState());
- }
-
- /**
- * Handles a session closed event raised by a {@link WebSocketHandler}.
- *
- * @param session The session that is now closed.
- * @param statusCode The status code returned.
- * @param reason The reason for quitting.
- */
- void sessionClosed(final Session session, final int statusCode, final String reason) {
- synchronized (sessionLock) {
- sessions.remove(session);
- if (sessions.isEmpty() && subscribed.getAndSet(false)) {
- eventBus.unsubscribe(this);
- }
- }
- }
-
- /**
- * Handles a message received event raised by a {@link WebSocketHandler}.
- *
- * @param session The session that the message is sent on.
- * @param message The message that was received.
- */
- void messageReceived(final Session session, final String message) {
- // Echo the message back for testing
- sendMessage(session, message);
- }
-
- /**
- * Sends a message to a specific session.
- *
- * @param session The session to send a message to.
- * @param message The message to be sent.
- */
- private void sendMessage(final Session session, final String message) {
- try {
- WebSocketHandler.sendMessage(session, message);
- } catch (IOException ex) {
- // TODO: Raise an error...
- }
- }
-
- /**
- * Sends a message to all connected sessions.
- *
- * @param message The message to be sent.
- */
- private void sendMessage(final String message) {
- sessions.forEach(s -> sendMessage(s, message));
- }
-
- }
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