Example usage for org.apache.hadoop.service Service isInState

Introduction

In this page you can find the example usage for org.apache.hadoop.service Service isInState.

Prototype

boolean isInState(STATE state);

Source Link

Document

Query to see if the service is in a specific state.

Usage

From source file:org.apache.hoya.yarn.service.CompoundService.java

License:Apache License

/**
 * When this service is started, any service stopping with a failure
 * exception is converted immediately into a failure of this service, 
 * storing the failure and stopping ourselves.
 * @param child the service that has changed.
 *///w w  w  .j a  v a  2s  .c  o  m
@Override
public void stateChanged(Service child) {
    //if that child stopped while we are running:
    if (isInState(STATE.STARTED) && child.isInState(STATE.STOPPED)) {
        // a child service has stopped
        //did the child fail? if so: propagate
        Throwable failureCause = child.getFailureCause();
        if (failureCause != null) {
            log.info("Child service " + child + " failed", failureCause);
            //failure. Convert to an exception
            Exception e = HoyaServiceUtils.convertToException(failureCause);
            //flip ourselves into the failed state
            noteFailure(e);
            stop();
        } else {
            log.info("Child service completed {}", child);
            if (areAllChildrenStopped()) {
                log.info("All children are halted: stopping");
                stop();
            }
        }
    }
}

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From source file:org.apache.hoya.yarn.service.CompoundService.java

License:Apache License

private boolean areAllChildrenStopped() {
    List<Service> children = getServices();
    boolean stopped = true;
    for (Service child : children) {
        if (!child.isInState(STATE.STOPPED)) {
            stopped = false;/*from w  ww  .  j ava 2  s . co  m*/
            break;
        }
    }
    return stopped;
}

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From source file:org.apache.hoya.yarn.service.SequenceService.java

License:Apache License

/**
 * State change event relays service stop events to
 * {@link #onServiceCompleted(Service)}. Subclasses can
 * extend that with extra logic// w w  w . ja v  a 2s.  c  o m
 * @param service the service that has changed.
 */
@Override
public void stateChanged(Service service) {
    if (service == currentService && service.isInState(STATE.STOPPED)) {
        onServiceCompleted(service);
    }
}

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From source file:org.apache.slider.server.appmaster.SliderAppMaster.java

License:Apache License

/**
 * Received on listening service termination.
 * @param service the service that has changed.
 *//*w  ww  . j  a v  a  2 s . co m*/
@Override //ServiceStateChangeListener
public void stateChanged(Service service) {
    if (service == providerService && service.isInState(STATE.STOPPED)) {
        //its the current master process in play
        int exitCode = providerService.getExitCode();
        int mappedProcessExitCode = exitCode;

        boolean shouldTriggerFailure = !amCompletionFlag.get() && (mappedProcessExitCode != 0);

        if (shouldTriggerFailure) {
            String reason = "Spawned process failed with raw " + exitCode + " mapped to "
                    + mappedProcessExitCode;
            ActionStopSlider stop = new ActionStopSlider("stop", mappedProcessExitCode,
                    FinalApplicationStatus.FAILED, reason);
            //this wasn't expected: the process finished early
            spawnedProcessExitedBeforeShutdownTriggered = true;
            log.info("Process has exited with exit code {} mapped to {} -triggering termination", exitCode,
                    mappedProcessExitCode);

            //tell the AM the cluster is complete 
            signalAMComplete(stop);
        } else {
            //we don't care
            log.info("Process has exited with exit code {} mapped to {} -ignoring", exitCode,
                    mappedProcessExitCode);
        }
    } else {
        super.stateChanged(service);
    }
}

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From source file:org.apache.slider.server.services.utility.EndOfServiceWaiter.java

License:Apache License

/**
 * Wait for service state change callbacks; notify self if the service has
 * now stopped/*  ww  w  . j  av a 2s .  c  o m*/
 * @param service service
 */
@Override
public synchronized void stateChanged(Service service) {
    if (service.isInState(Service.STATE.STOPPED)) {
        finished.set(true);
        notify();
    }
}

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From source file:org.apache.slider.server.services.workflow.EndOfServiceWaiter.java

License:Apache License

@Override
public synchronized void stateChanged(Service service) {
    if (service.isInState(Service.STATE.STOPPED)) {
        finished.set(true);//  ww  w  . ja  va  2 s .c  o  m
        notify();
    }
}

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From source file:org.apache.slider.server.services.workflow.WorkflowCompositeService.java

License:Apache License

/**
 * When this service is started, any service stopping with a failure
 * exception is converted immediately into a failure of this service, 
 * storing the failure and stopping ourselves.
 * @param child the service that has changed.
 *//*w  w w  .  j a  v a 2  s  .c o  m*/
@Override
public void stateChanged(Service child) {
    //if that child stopped while we are running:
    if (isInState(STATE.STARTED) && child.isInState(STATE.STOPPED)) {
        // a child service has stopped
        //did the child fail? if so: propagate
        Throwable failureCause = child.getFailureCause();
        if (failureCause != null) {
            LOG.info("Child service " + child + " failed", failureCause);
            //failure. Convert to an exception
            Exception e = (failureCause instanceof Exception) ? (Exception) failureCause
                    : new Exception(failureCause);
            //flip ourselves into the failed state
            noteFailure(e);
            stop();
        } else {
            LOG.info("Child service completed {}", child);
            if (areAllChildrenStopped()) {
                LOG.info("All children are halted: stopping");
                stop();
            }
        }
    }
}

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From source file:org.apache.slider.server.services.workflow.WorkflowCompositeService.java

License:Apache License

/**
 * Probe to query if all children are stopped -simply
 * by taking a snapshot of the child service list and enumerating
 * their state. // w w w.j  a  v  a  2  s  .c  o m
 * The state of the children may change during this operation -that will
 * not get picked up.
 * @return true if all the children are stopped.
 */
private boolean areAllChildrenStopped() {
    List<Service> children = getServices();
    boolean stopped = true;
    for (Service child : children) {
        if (!child.isInState(STATE.STOPPED)) {
            stopped = false;
            break;
        }
    }
    return stopped;
}

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From source file:org.apache.slider.server.services.workflow.WorkflowSequenceService.java

License:Apache License

/**
 * State change event relays service stop events to
 * {@link #onServiceCompleted(Service)}. Subclasses can
 * extend that with extra logic//from  w  ww  . j  a  v  a  2  s  . c o m
 * @param service the service that has changed.
 */
@Override
public void stateChanged(Service service) {
    // only react to the state change when it is the current service
    // and it has entered the STOPPED state
    if (service == activeService && service.isInState(STATE.STOPPED)) {
        onServiceCompleted(service);
    }
}

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