Examples with SchedulerException com.twitter.heron.spi.scheduler.SchedulerException used on opensource projects

Example 6 with SchedulerException

use of com.twitter.heron.spi.scheduler.SchedulerException in project incubator-heron by apache.

the class SchedulerClientFactory method getSchedulerClient.

/**
 * Implementation of getSchedulerClient - Used to create objects
 * Currently it creates either HttpServiceSchedulerClient or LibrarySchedulerClient
 *
 * @return getSchedulerClient created. return null if failed to create ISchedulerClient instance
 */
public ISchedulerClient getSchedulerClient() throws SchedulerException {
    LOG.fine("Creating scheduler client");
    ISchedulerClient schedulerClient;
    if (Context.schedulerService(config)) {
        // get the instance of the state manager
        SchedulerStateManagerAdaptor statemgr = Runtime.schedulerStateManagerAdaptor(runtime);
        Scheduler.SchedulerLocation schedulerLocation = statemgr.getSchedulerLocation(Runtime.topologyName(runtime));
        if (schedulerLocation == null) {
            throw new SchedulerException("Failed to get scheduler location from state manager");
        }
        LOG.log(Level.FINE, "Scheduler is listening on location: {0} ", schedulerLocation.toString());
        schedulerClient = new HttpServiceSchedulerClient(config, runtime, schedulerLocation.getHttpEndpoint());
    } else {
        // create an instance of scheduler
        final IScheduler scheduler = LauncherUtils.getInstance().getSchedulerInstance(config, runtime);
        LOG.fine("Invoke scheduler as a library");
        schedulerClient = new LibrarySchedulerClient(config, runtime, scheduler);
    }
    return schedulerClient;
}