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- /*
- * Copyright (c) 2006-2014 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.util;
-
- import net.engio.mbassy.bus.MBassador;
- import net.engio.mbassy.bus.config.BusConfiguration;
- import net.engio.mbassy.listener.Handler;
-
- import static com.google.common.base.Preconditions.checkNotNull;
-
- /**
- * Utility for creating and managing instances of {@link net.engio.mbassy.bus.MBassador} that are slaved to a parent bus.
- * <p>
- * Any events sent on the child bus will be propagated up to the parent bus.
- */
- public class ChildEventBusManager {
-
- private final MBassador parent;
- private final MBassador child;
- private final EventPropagator propagator;
-
- public ChildEventBusManager(final MBassador parent) {
- this.parent = checkNotNull(parent);
- this.child = new MBassador(BusConfiguration.Default());
- this.propagator = new EventPropagator();
- }
-
- /**
- * Connects the child event bus to the parent.
- * <p>
- * After this method is called, all events sent to the child bus will be passed to the parent.
- */
- public void connect() {
- child.subscribe(propagator);
- }
-
- /**
- * Disconnects the child event bus from the parent.
- * <p>
- * After this method is called, no further events will be passed to the parent.
- */
- public void disconnect() {
- child.unsubscribe(propagator);
- }
-
- /**
- * Gets the child bus.
- *
- * @return The child bus belonging to this manager.
- */
- public MBassador getChildBus() {
- return child;
- }
-
- private class EventPropagator {
-
- @Handler
- public void handleEvent(final Object object) {
- parent.post(object);
- }
-
- }
-
- }
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