Examples of org.sonar.process.ProcessCommands

org.sonar.process.ProcessCommands
Process inter-communication to :
- share status of child process
- stop child process
It relies on files shared by both processes. Following alternatives were considered but not selected :
- JMX beans over RMI: network issues (mostly because of Java reverse-DNS) + requires to configure and open a new port
- simple socket protocol: same drawbacks are RMI connection
- java.lang.Process#destroy(): shutdown hooks are not executed on some OS (mostly MSWindows)
- execute OS-specific commands (for instance kill on *nix): OS-specific, so hell to support. Moreover how to get identify a process ?


  public void start(Props props) {
    if (props.valueAsBoolean(ProcessConstants.ENABLE_STOP_COMMAND, false)) {
      // stop application when file <temp>/app.stop is created
      File tempDir = props.nonNullValueAsFile(ProcessConstants.PATH_TEMP);
      ProcessCommands commands = new ProcessCommands(tempDir, "app");
      stopWatcher = new StopWatcher(commands, this);
      stopWatcher.start();
    }
    monitor.start(createCommands(props));
    monitor.awaitTermination();

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  ProcessRef launch(JavaCommand command) {
    Process process = null;
    try {
      // cleanup existing monitor files
      ProcessCommands commands = new ProcessCommands(command.getTempDir(), command.getKey());
      commands.prepare();


      ProcessBuilder processBuilder = create(command);
      LoggerFactory.getLogger(getClass()).info("Launch process[{}]: {}",
        command.getKey(), StringUtils.join(processBuilder.command(), " "));
      process = processBuilder.start();

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Related Classes of org.sonar.process.ProcessCommands

org.sonar.application.App

org.sonar.process.monitor.JavaProcessLauncher

java.io.File

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