ProcessStreamsReader.java

/*
 * ProActive Parallel Suite(TM):
 * The Open Source library for parallel and distributed
 * Workflows & Scheduling, Orchestration, Cloud Automation
 * and Big Data Analysis on Enterprise Grids & Clouds.
 *
 * Copyright (c) 2007 - 2017 ActiveEon
 * Contact: contact@activeeon.com
 *
 * This library is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation: version 3 of
 * the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * If needed, contact us to obtain a release under GPL Version 2 or 3
 * or a different license than the AGPL.
 */
package org.ow2.proactive.scheduler.task.utils;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;


public class ProcessStreamsReader {

    private final Thread threadReadingOutput;

    private final Thread threadReadingError;

    public ProcessStreamsReader(String name, Process process, PrintStream outputSink, PrintStream errorSink) {
        BufferedReader processOutput = new BufferedReader(new InputStreamReader(process.getInputStream()));
        BufferedReader processError = new BufferedReader(new InputStreamReader(process.getErrorStream()));
        threadReadingOutput = new Thread(new ThreadReader(processOutput, outputSink), name + "_OUT");
        threadReadingError = new Thread(new ThreadReader(processError, errorSink), name + "_ERR");
        threadReadingOutput.start();
        threadReadingError.start();
    }

    public void close() {
        try {
            // wait for log flush
            if (threadReadingOutput != null) {
                threadReadingOutput.join();
            }
            if (threadReadingError != null) {
                threadReadingError.join();
            }
        } catch (InterruptedException ignored) {
            Thread.currentThread().interrupt();
        }
    }
}