JSkatEventBus.java

/**
 * Copyright (C) 2017 Jan Schäfer (jansch@users.sourceforge.net)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jskat.control;

import java.util.HashMap;
import java.util.Map;

import org.jskat.control.command.table.CreateTableCommand;
import org.jskat.control.command.table.RemoveTableCommand;
import org.jskat.control.command.table.ShowCardsCommand;
import org.jskat.control.event.table.ActivePlayerChangedEvent;
import org.jskat.control.event.table.SkatSeriesStartedEvent;
import org.jskat.control.event.table.TableCreatedEvent;
import org.jskat.control.event.table.TableGameMoveEvent;
import org.jskat.control.event.table.TableRemovedEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.eventbus.DeadEvent;
import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;

/**
 * Central event bus for JSkat.
 */
public class JSkatEventBus {

	private final static Logger LOG = LoggerFactory
			.getLogger(JSkatEventBus.class);

	private final EventBus mainEventBus;

	public final static JSkatEventBus INSTANCE = new JSkatEventBus();
	public final static Map<String, EventBus> TABLE_EVENT_BUSSES = new HashMap<>();

	private JSkatEventBus() {
		mainEventBus = new EventBus("JSkat");
		mainEventBus.register(this);
	}

	public void register(Object listener) {
		mainEventBus.register(listener);
	}

	public void post(Object event) {
		mainEventBus.post(event);
	}

	@Subscribe
	public void on(DeadEvent event) {
		LOG.error("Recieved dead event: " + event.getEvent());
	}

	@Subscribe
	public void createTableEventBusOn(final CreateTableCommand command) {

		if (!JSkatEventBus.TABLE_EVENT_BUSSES.containsKey(command.tableName)) {
			EventBus eventBus = new EventBus("Table " + command.tableName);
			JSkatEventBus.TABLE_EVENT_BUSSES.put(command.tableName, eventBus);

			post(new TableCreatedEvent(command.tableType, command.tableName));
		}
	}

	@Subscribe
	public void removeTableEventBusOn(final RemoveTableCommand command) {
		JSkatEventBus.TABLE_EVENT_BUSSES.remove(command.tableName);

		post(new TableRemovedEvent(command.tableName, command.tableType));
	}

	@Subscribe
	public void dispatchTableEventOn(ActivePlayerChangedEvent event) {
		JSkatEventBus.TABLE_EVENT_BUSSES.get(event.tableName).post(event);
	}

	@Subscribe
	public void dispatchTableEventOn(TableGameMoveEvent event) {
		LOG.info("Forwarding game event " + event.gameEvent + " to table "
				+ event.tableName);
		JSkatEventBus.TABLE_EVENT_BUSSES.get(event.tableName)
				.post(event.gameEvent);
	}

	@Subscribe
	public void dispatchTableEventOn(SkatSeriesStartedEvent event) {
		LOG.info("Forwarding table event " + event + " to table "
				+ event.tableName);
		JSkatEventBus.TABLE_EVENT_BUSSES.get(event.tableName).post(event);
	}

	@Subscribe
	public void dispatchTableCommandOn(ShowCardsCommand command) {
		LOG.info("Forwarding command " + command + " to table "
				+ command.tableName);
		JSkatEventBus.TABLE_EVENT_BUSSES.get(command.tableName).post(command);
	}
}