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/*
 * Copyright (c) 2017 Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/master/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * The Payara Foundation designates this particular file as subject to the "Classpath"
 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 *
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 * 
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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 fish.payara.arquillian.container.payara.process;

import static java.util.logging.Level.SEVERE;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.logging.Logger;

public class ConsoleReader implements Runnable, AutoCloseable {
    
    private static final Logger logger = Logger.getLogger(ConsoleReader.class.getName());

    private final ProcessOutputConsumer consumer;
    private final BufferedReader reader;

    private volatile boolean closing;

    public ConsoleReader(final Process process, ProcessOutputConsumer consumer) {
        this.reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        this.consumer = consumer;
        closing = false;
    }

    @Override
    public void run() {
        String line;
        try {
            while (!closing) {
                if ((line = reader.readLine()) != null) {
                    consumer.consume(line);
                }
            }
        } catch (IOException failOnReading) {
            // Swallow exceptions from the log reader failing, then close the reader.
        } finally {
            try {
				reader.close();
			} catch (IOException ex) {
                logger.log(SEVERE, "An error occurred while closing the ConsoleReader.", ex);
			}
        }
    }

    @SuppressWarnings("unchecked")
    public  T getConsumer() {
        return (T) consumer;
    }

    @Override
    public void close() {
        closing = true;
    }
}