Example usage for org.apache.hadoop.service ServiceOperations stopQuietly

Introduction

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

Prototype

public static Exception stopQuietly(Logger log, Service service) 

Source Link

Document

Stop a service; if it is null do nothing.

Usage

From source file:MRAppMaster.CompositeService.java

License:Apache License

/**
 * Stop the services in reverse order/*ww  w  .  j a va 2s  .  c  o  m*/
 *
 * @param numOfServicesStarted index from where the stop should work
 * @param stopOnlyStartedServices flag to say "only start services that are
 * started, not those that are NOTINITED or INITED.
 * @throws RuntimeException the first exception raised during the
 * stop process -<i>after all services are stopped</i>
 */
private void stop(int numOfServicesStarted, boolean stopOnlyStartedServices) {
    // stop in reverse order of start
    Exception firstException = null;
    List<Service> services = getServices();
    for (int i = numOfServicesStarted - 1; i >= 0; i--) {
        Service service = services.get(i);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Stopping service #" + i + ": " + service);
        }
        STATE state = service.getServiceState();
        //depending on the stop police
        if (state == STATE.STARTED || (!stopOnlyStartedServices && state == STATE.INITED)) {
            Exception ex = ServiceOperations.stopQuietly(LOG, service);
            if (ex != null && firstException == null) {
                firstException = ex;
            }
        }
    }
    //after stopping all services, rethrow the first exception raised
    if (firstException != null) {
        throw ServiceStateException.convert(firstException);
    }
}

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From source file:org.apache.tez.dag.app.DAGAppMaster.java

License:Apache License

void stopServices() {
    // stop in reverse order of start
    List<Service> serviceList = new ArrayList<Service>(services.size());
    for (ServiceWithDependency sd : services.values()) {
        serviceList.add(sd.service);/*from   ww  w. jav  a 2s  . c  o  m*/
    }
    Exception firstException = null;
    for (int i = services.size() - 1; i >= 0; i--) {
        Service service = serviceList.get(i);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Stopping service : " + service);
        }
        Exception ex = ServiceOperations.stopQuietly(LOG, service);
        if (ex != null && firstException == null) {
            LOG.warn("Failed to stop service, name=" + service.getName(), ex);
            firstException = ex;
        }
    }
    //after stopping all services, rethrow the first exception raised
    if (firstException != null) {
        throw ServiceStateException.convert(firstException);
    }
}

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