Example usage for java.lang Process waitFor

List of usage examples for java.lang Process waitFor

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Introduction

In this page you can find the example usage for java.lang Process waitFor.

Prototype

public abstract int waitFor() throws InterruptedException;

Source Link

Document

Causes the current thread to wait, if necessary, until the process represented by this Process object has terminated.

Usage

From source file:net.opentsdb.tsd.GraphHandler.java

/**
 * Runs Gnuplot in a subprocess to generate the graph.
 * <strong>This function will block</strong> while Gnuplot is running.
 * @param query The query being handled (for logging purposes).
 * @param basepath The base path used for the Gnuplot files.
 * @param plot The plot object to generate Gnuplot's input files.
 * @return The number of points plotted by Gnuplot (0 or more).
 * @throws IOException if the Gnuplot files can't be written, or
 * the Gnuplot subprocess fails to start, or we can't read the
 * graph from the file it produces, or if we have been interrupted.
 * @throws GnuplotException if Gnuplot returns non-zero.
 *//*from w  ww .j  a va 2 s . c om*/
static int runGnuplot(final HttpQuery query, final String basepath, final Plot plot) throws IOException {
    final int nplotted = plot.dumpToFiles(basepath);
    final long start_time = System.nanoTime();
    final Process gnuplot = new ProcessBuilder(GNUPLOT, basepath + ".out", basepath + ".err",
            basepath + ".gnuplot").start();
    final int rv;
    try {
        rv = gnuplot.waitFor(); // Couldn't find how to do this asynchronously.
    } catch (InterruptedException e) {
        Thread.currentThread().interrupt(); // Restore the interrupted status.
        throw new IOException("interrupted", e); // I hate checked exceptions.
    } finally {
        // We need to always destroy() the Process, otherwise we "leak" file
        // descriptors and pipes.  Unless I'm blind, this isn't actually
        // documented in the Javadoc of the !@#$%^ JDK, and in Java 6 there's no
        // way to ask the stupid-ass ProcessBuilder to not create fucking pipes.
        // I think when the GC kicks in the JVM may run some kind of a finalizer
        // that closes the pipes, because I've never seen this issue on long
        // running TSDs, except where ulimit -n was low (the default, 1024).
        gnuplot.destroy();
    }
    gnuplotlatency.add((int) ((System.nanoTime() - start_time) / 1000000));
    if (rv != 0) {
        final byte[] stderr = readFile(query, new File(basepath + ".err"), 4096);
        // Sometimes Gnuplot will error out but still create the file.
        new File(basepath + ".png").delete();
        if (stderr == null) {
            throw new GnuplotException(rv);
        }
        throw new GnuplotException(new String(stderr));
    }
    // Remove the files for stderr/stdout if they're empty.
    deleteFileIfEmpty(basepath + ".out");
    deleteFileIfEmpty(basepath + ".err");
    return nplotted;
}

From source file:br.com.autonomiccs.autonomic.plugin.common.utils.ShellCommandUtils.java

/**
 * It executes the specified shell command and wait for the
 * end of command execution to continue with the application
 * flow./*from   www  .  jav a  2  s  .c om*/
 *
 * If an exception happens, it will get logged and the flow of execution continues.
 * This method will not break the flow of execution if an expected exception happens.
 *
 * @param command
 *            The command that will be executed.
 * @return
 *         A <code>String</code> that is the result from
 *         command executed.
 */
public String executeCommand(String command) {
    Writer output = new StringWriter();
    try {
        Process p = Runtime.getRuntime().exec(command);
        p.waitFor();
        IOUtils.copy(p.getInputStream(), output);
    } catch (IOException | InterruptedException e) {
        logger.error(String.format("An error happened while executing command[%s]", command), e);
    }
    return output.toString();
}

From source file:org.segator.plex.cloud.transcoding.NFSConfigurerBO.java

private void refreshExport() throws IOException, InterruptedException {
    String exportPermission = "";
    for (String ip : ipList) {
        exportPermission += ip + "(rw,sync,secure,no_subtree_check,root_squash) ";
    }//  w  w w  .j ava 2 s  . com
    String exportFileString = "/transcode " + exportPermission + "\n/usr/lib/plexmediaserver "
            + exportPermission + "\n" + "\"/config/Library/Application Support\" " + exportPermission + "\n"
            + applicationParameters.getMediaDirectory() + " " + exportPermission;
    File exportsFile = new File("/etc/exports");
    if (exportsFile.exists()) {
        exportsFile.delete();
    }
    FileUtils.writeStringToFile(exportsFile, exportFileString, "UTF-8");
    Process process = new ProcessBuilder("exportfs", "-r").start();
    process.waitFor();
}

From source file:com.thoughtworks.go.util.command.ProcessRunner.java

public int run() throws IOException, InterruptedException {
    File workingDir = builder.directory() == null ? new File(".") : builder.directory();
    System.out.println(String.format("Trying to run command: %s from %s",
            Arrays.toString(builder.command().toArray()), workingDir.getAbsolutePath()));
    Process process = builder.start();
    int exitCode = process.waitFor();
    System.out.println(/* w w w.jav  a 2s.  c o m*/
            "Finished command: " + Arrays.toString(builder.command().toArray()) + ". Exit code: " + exitCode);
    if (exitCode != 0) {
        if (failOnError) {
            throw new RuntimeException(String.format("Command exited with code %s. \n Exception: %s", exitCode,
                    IOUtils.toString(process.getErrorStream())));
        } else {
            LOGGER.error("Command exited with code {}. \n Exception: {}", exitCode,
                    IOUtils.toString(process.getErrorStream()));
        }
    }
    return exitCode;
}

From source file:Main.java

public static int shellExecute(String strCommand, boolean bDisplayProgramOutput) {
    Process p = null;
    try {//from  w ww.  j a va  2  s. c om
        p = Runtime.getRuntime().exec(strCommand);
    } catch (IOException e) {
        e.printStackTrace();
    }

    if (p != null) {
        BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line = "";
        try {
            line = input.readLine();
            if (bDisplayProgramOutput && line != null)
                System.out.println(line);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        while (line != null) {
            try {
                line = input.readLine();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            if (bDisplayProgramOutput && line != null)
                System.out.println(line);
        }

        try {
            p.waitFor();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return p.exitValue();
    }

    return -1;
}

From source file:com.wenzani.maven.mongodb.StartMongoDb.java

private void chmodMongoD() throws IOException, InterruptedException {
    String chmod = new StringBuilder("chmod +x ").append(getMongoD()).toString();
    Process process = Runtime.getRuntime().exec(chmod);
    process.waitFor();
}

From source file:org.apache.asterix.test.aql.TestExecutor.java

private static String executeVagrantScript(ProcessBuilder pb, String node, String scriptName) throws Exception {
    pb.command("vagrant", "ssh", node, "--", pb.environment().get("SCRIPT_HOME") + scriptName);
    Process p = pb.start();//w w  w .  j a  v  a2 s.  co m
    p.waitFor();
    InputStream input = p.getInputStream();
    return IOUtils.toString(input, StandardCharsets.UTF_8.name());
}

From source file:org.apache.asterix.test.aql.TestExecutor.java

private static String executeVagrantManagix(ProcessBuilder pb, String command) throws Exception {
    pb.command("vagrant", "ssh", "cc", "--", pb.environment().get("MANAGIX_HOME") + command);
    Process p = pb.start();/*from  w w  w .  j  ava2 s  . com*/
    p.waitFor();
    InputStream input = p.getInputStream();
    return IOUtils.toString(input, StandardCharsets.UTF_8.name());
}

From source file:io.pcp.parfait.dxm.PcpClient.java

String getMetric(String metricName) throws Exception {
    Process exec = Runtime.getRuntime().exec("pmdumptext -s 1 -t 0.001 -r " + metricName);
    exec.waitFor();
    if (exec.exitValue() != 0) {
        throw new PcpFetchException(exec);
    }//ww w .  j av a2 s . c om

    String result = IOUtils.toString(exec.getInputStream());
    Pattern pattern = Pattern.compile("\t(.*?)\n");
    Matcher matcher = pattern.matcher(result);
    if (matcher.find()) {
        return matcher.group(1);
    }
    throw new PcpFetchException("Could not find metric in the output: " + result);
}

From source file:com.formkiq.core.service.sign.MacWrapperConfig.java

/**
 * Attempts to find an executable in the system path.
 * @param executable {@link String}//from   w w w  .j a v  a2s  .  c o  m
 * @return {@link String}
 */
public String findExecutable(final String executable) {
    try {
        String osname = System.getProperty("os.name").toLowerCase();

        String cmd = osname.contains("windows") ? "where " + executable : "which " + executable;

        Process p = Runtime.getRuntime().exec(cmd);
        p.waitFor();

        String text = IOUtils.toString(p.getInputStream(), Charset.defaultCharset());

        if (text.isEmpty()) {
            throw new RuntimeException();
        }

        return text;

    } catch (InterruptedException e) {
        return null;
    } catch (IOException e) {
        return null;
    } catch (RuntimeException e) {
        return null;
    }
}