Example usage for org.apache.hadoop.service ServiceStateException ServiceStateException

Introduction

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

Prototype

public ServiceStateException(Throwable cause) 

Source Link

Usage

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

License:Apache License

@Override //AbstractService
protected void serviceStart() throws Exception {
    if (process == null) {
        throw new ServiceStateException("Subprocess not yet configured");
    }/* ww w  .ja  va 2s  .co m*/
    //now spawn the process -expect updates via callbacks
    process.spawnApplication();
}

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

License:Apache License

/**
 * Start the next service in the list.//from   w w  w.  j av a2s.  co m
 * Return false if there are no more services to run, or this
 * service has stopped
 * @return true if a service was started
 * @throws RuntimeException from any init or start failure
 * @throws ServiceStateException if this call is made before
 * the service is started
 */
public synchronized boolean startNextService() {
    if (isInState(STATE.STOPPED)) {
        //downgrade to a failed
        log.debug("Not starting next service -{} is stopped", this);
        return false;
    }
    if (!isInState(STATE.STARTED)) {
        //reject attempts to start a service too early
        throw new ServiceStateException("Cannot start a child service when not started");
    }
    if (serviceList.isEmpty()) {
        //nothing left to run
        return false;
    }
    if (currentService != null && currentService.getFailureCause() != null) {
        //did the last service fail? Is this caused by some premature callback?
        log.debug("Not starting next service due to a failure of {}", currentService);
        return false;
    }
    //bear in mind that init & start can fail, which
    //can trigger re-entrant calls into the state change listener.
    //by setting the current service to null
    //the start-next-service logic is skipped.
    //now, what does that mean w.r.t exit states?

    currentService = null;
    Service head = serviceList.remove(0);

    try {
        head.init(getConfig());
        head.registerServiceListener(this);
        head.start();
    } catch (RuntimeException e) {
        noteFailure(e);
        throw e;
    }
    //at this point the service must have explicitly started & not failed,
    //else an exception would have been raised
    currentService = head;
    return true;
}

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

License:Apache License

@Override //AbstractService
protected void serviceStart() throws Exception {
    if (process == null) {
        throw new ServiceStateException("Process not yet configured");
    }//w  w  w.  j  a v a 2s.  c o  m
    //now spawn the process -expect updates via callbacks
    process.start();
}

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

License:Apache License

void finish() {
    if (fail) {//  w  w  w .  ja  v a  2s  . co m
        ServiceStateException e = new ServiceStateException(getName() + " failed");

        noteFailure(e);
        stop();
        throw e;
    } else {
        stop();
    }
}

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

License:Apache License

/**
 * Start the next service in the list./*w w  w . ja v  a2  s. c  o m*/
 * Return false if there are no more services to run, or this
 * service has stopped
 * @return true if a service was started
 * @throws RuntimeException from any init or start failure
 * @throws ServiceStateException if this call is made before
 * the service is started
 */
public synchronized boolean startNextService() {
    if (isInState(STATE.STOPPED)) {
        //downgrade to a failed
        LOG.debug("Not starting next service -{} is stopped", this);
        return false;
    }
    if (!isInState(STATE.STARTED)) {
        //reject attempts to start a service too early
        throw new ServiceStateException("Cannot start a child service when not started");
    }
    if (serviceList.isEmpty()) {
        //nothing left to run
        return false;
    }
    if (activeService != null && activeService.getFailureCause() != null) {
        //did the last service fail? Is this caused by some premature callback?
        LOG.debug("Not starting next service due to a failure of {}", activeService);
        return false;
    }
    //bear in mind that init & start can fail, which
    //can trigger re-entrant calls into the state change listener.
    //by setting the current service to null
    //the start-next-service logic is skipped.
    //now, what does that mean w.r.t exit states?

    activeService = null;
    Service head = serviceList.remove(0);

    try {
        head.init(getConfig());
        head.registerServiceListener(this);
        head.start();
    } catch (RuntimeException e) {
        noteFailure(e);
        throw e;
    }
    //at this point the service must have explicitly started & not failed,
    //else an exception would have been raised
    activeService = head;
    return true;
}

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