LogController.java

/*
 * Copyright 2011 Matthias van der Vlies
 *
 *  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 controllers;

import java.io.FileNotFoundException;
import java.io.IOException;

import models.Application;
import models.ApplicationProperty;
import play.libs.F.Promise;
import play.mvc.WebSocketController;
import core.LogGenerator;

public class LogController extends WebSocketController {

	public static void application(final Long id) throws IOException, Exception {
		final Application application = Application.findById(id);
		if(application == null) {
			disconnect();
		}
		else {
			try {
				final ApplicationProperty logFileProperty = ApplicationProperty.findLogFileProperty(application);
				logToOutbound("apps/" + application.pid + "/" + (application.subfolder == null ? "" : application.subfolder) + logFileProperty.value, true);
			}
			catch(FileNotFoundException e) {
				// ignore, logs may have been removed
			}
		}
	}
	
	public static void manager() throws Exception {
		logToOutbound("logs/play-as.log", true);
	}

	private static void logToOutbound(String filePath, boolean skipToEnd) throws Exception, IOException {
		final LogGenerator generator = new LogGenerator(filePath, skipToEnd);
		try {
			while(inbound.isOpen()) {
				final Promise<String> promise = generator.now();
				final String data = await(promise);			
				outbound.send(data);
		    }
		}
		catch(Exception e) {
			// swallow
		}
		generator.close();
	}
}