How to use

codePidRunning

method

in

org.apache.brooklyn.core.effector.ssh.SshEffectorTasks

/** task which fails if the given PID is not running */
public static SshEffectorTaskFactory<?> requirePidRunning(Integer pid) {
  return codePidRunning(pid).summary("PID "+pid+" is-running check (required)").requiringExitCodeZero("Process with PID "+pid+" is required to be running");
}

/** as {@link #codePidRunning(Integer)} but returning boolean */
public static SshEffectorTaskFactory<Boolean> isPidRunning(Integer pid) {
  return codePidRunning(pid).summary("PID "+pid+" is-running check (boolean)").returning(new Function<ProcessTaskWrapper<?>, Boolean>() {
    @Override
    public Boolean apply(@Nullable ProcessTaskWrapper<?> input) { return Integer.valueOf(0).equals(input.getExitCode()); }
  });
}

@Test(groups="Integration")
public void testNonRunningPid() {
  ProcessTaskWrapper<Integer> t = submit(SshEffectorTasks.codePidRunning(99999));
  Assert.assertNotEquals(t.getTask().getUnchecked(), 0);
  Assert.assertNotEquals(t.getExitCode(), 0);
  ProcessTaskWrapper<Boolean> t2 = submit(SshEffectorTasks.isPidRunning(99999));
  Assert.assertFalse(t2.getTask().getUnchecked());
}

@Test(groups="Integration")
public void testRunningPid() {
  ProcessTaskWrapper<Integer> t = submit(SshEffectorTasks.codePidRunning(getMyPid()));
  Assert.assertEquals(t.getTask().getUnchecked(), (Integer)0);
  ProcessTaskWrapper<Boolean> t2 = submit(SshEffectorTasks.isPidRunning(getMyPid()));
  Assert.assertTrue(t2.getTask().getUnchecked());
}

  protected void checkIsRunningAndStops(Entity mysql, SshMachineLocation lh) {
    Integer pid = getPid(mysql);
    Assert.assertNotNull(pid, "PID should be set as an attribute (or getPid() overridden to supply)");
    Entities.submit(app, SshEffectorTasks.requirePidRunning(pid).machine(lh).newTask() ).get();
    
    app.stop();

    // let the kill -1 take effect 
    Time.sleep(Duration.ONE_SECOND);
    
    // and assert it has died
    log.info("mysql in pid "+pid+" should be dead now");
    // (app has stopped, so submit on mgmt context)
    ProcessTaskWrapper<Integer> t = SshEffectorTasks.codePidRunning(pid).machine(lh).newTask();
    mgmt.getExecutionManager().submit(t);
    Assert.assertNotEquals(t.block().getExitCode(), 0);
  }
}