com.qwazr.utils.process.ProcessUtils.java Source code

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Here is the source code for com.qwazr.utils.process.ProcessUtils.java

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/**
 * Copyright 2016 Emmanuel Keller / QWAZR
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.qwazr.utils.process;

import org.apache.commons.lang3.SystemUtils;

import java.io.File;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Objects;

public class ProcessUtils {

    public final static String NOT_SUPPORTED_ERROR = "Process command unsupported on this operating system";

    public static Integer kill(Number pid) throws IOException, InterruptedException {
        if (pid == null)
            return null;
        final String commandLine;
        if (SystemUtils.IS_OS_UNIX)
            commandLine = "kill  " + pid;
        else if (SystemUtils.IS_OS_WINDOWS)
            commandLine = "taskkill /PID " + pid;
        else
            throw new IOException(NOT_SUPPORTED_ERROR);
        return run(commandLine);
    }

    public static Integer forceKill(Number pid) throws IOException, InterruptedException {
        if (pid == null)
            return null;
        final String commandLine;
        if (SystemUtils.IS_OS_UNIX)
            commandLine = "kill -9 " + pid;
        else if (SystemUtils.IS_OS_WINDOWS)
            commandLine = "taskkill /F /PID " + pid;
        else
            throw new IOException(NOT_SUPPORTED_ERROR);
        return run(commandLine);
    }

    public static Boolean isRunning(Number pid) throws IOException, InterruptedException {
        if (pid == null)
            return null;
        final String commandLine;
        if (SystemUtils.IS_OS_UNIX)
            commandLine = "kill -0 " + pid;
        else
            throw new IOException(NOT_SUPPORTED_ERROR);
        Integer res = run(commandLine);
        if (res == null)
            return null;
        return res == 0;
    }

    public static Integer run(String commandLine) throws InterruptedException, IOException {
        Process process = Runtime.getRuntime().exec(commandLine);
        try {
            return process.waitFor();
        } finally {
            process.destroy();
            if (process.isAlive())
                process.destroyForcibly();
        }
    }

}