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Example 11 with LauncherUtils

use of org.apache.heron.scheduler.utils.LauncherUtils in project heron by twitter.

the class SchedulerMain method runScheduler.

/**
 * Run the scheduler.
 * It is a blocking call, and it will return in 2 cases:
 * 1. The topology is requested to kill
 * 2. Unexpected exceptions happen
 *
 * @return true if scheduled successfully
 */
public boolean runScheduler() {
    IScheduler scheduler = null;
    String statemgrClass = Context.stateManagerClass(config);
    IStateManager statemgr;
    try {
        // create an instance of state manager
        statemgr = ReflectionUtils.newInstance(statemgrClass);
    } catch (IllegalAccessException | InstantiationException | ClassNotFoundException e) {
        LOG.log(Level.SEVERE, "Failed to instantiate instances using config: " + config, e);
        return false;
    }
    SchedulerServer server = null;
    boolean isSuccessful = false;
    // Put it in a try block so that we can always clean resources
    try {
        // initialize the state manager
        statemgr.initialize(config);
        // TODO(mfu): timeout should read from config
        SchedulerStateManagerAdaptor adaptor = new SchedulerStateManagerAdaptor(statemgr, 5000);
        // get a packed plan and schedule it
        PackingPlans.PackingPlan serializedPackingPlan = adaptor.getPackingPlan(topology.getName());
        if (serializedPackingPlan == null) {
            LOG.log(Level.SEVERE, "Failed to fetch PackingPlan for topology:{0} from the state manager", topology.getName());
            return false;
        }
        LOG.log(Level.INFO, "Packing plan fetched from state: {0}", serializedPackingPlan);
        PackingPlan packedPlan = new PackingPlanProtoDeserializer().fromProto(serializedPackingPlan);
        // build the runtime config
        LauncherUtils launcherUtils = LauncherUtils.getInstance();
        Config runtime = Config.newBuilder().putAll(launcherUtils.createPrimaryRuntime(topology)).putAll(launcherUtils.createAdaptorRuntime(adaptor)).put(Key.SCHEDULER_SHUTDOWN, getShutdown()).put(Key.SCHEDULER_PROPERTIES, properties).build();
        Config ytruntime = launcherUtils.createConfigWithPackingDetails(runtime, packedPlan);
        // invoke scheduler
        scheduler = launcherUtils.getSchedulerInstance(config, ytruntime);
        if (scheduler == null) {
            return false;
        }
        isSuccessful = scheduler.onSchedule(packedPlan);
        if (!isSuccessful) {
            LOG.severe("Failed to schedule topology");
            return false;
        }
        // Failures in server initialization throw exceptions
        // get the scheduler server endpoint for receiving requests
        server = getServer(ytruntime, scheduler, schedulerServerPort);
        // start the server to manage runtime requests
        server.start();
        // write the scheduler location to state manager
        // Make sure it happens after IScheduler.onScheduler
        isSuccessful = SchedulerUtils.setSchedulerLocation(runtime, String.format("%s:%d", server.getHost(), server.getPort()), scheduler);
        if (isSuccessful) {
            // wait until kill request or some interrupt occurs if the scheduler starts successfully
            LOG.info("Waiting for termination... ");
            Runtime.schedulerShutdown(ytruntime).await();
        }
    } catch (IOException e) {
        LOG.log(Level.SEVERE, "Failed to start server", e);
        return false;
    } finally {
        // Clean the resources
        if (server != null) {
            server.stop();
        }
        // 4. Close the resources
        SysUtils.closeIgnoringExceptions(scheduler);
        SysUtils.closeIgnoringExceptions(statemgr);
    }
    return isSuccessful;
}
Also used : IStateManager(org.apache.heron.spi.statemgr.IStateManager) SystemConfig(org.apache.heron.common.config.SystemConfig) Config(org.apache.heron.spi.common.Config) PackingPlan(org.apache.heron.spi.packing.PackingPlan) IOException(java.io.IOException) LauncherUtils(org.apache.heron.scheduler.utils.LauncherUtils) SchedulerStateManagerAdaptor(org.apache.heron.spi.statemgr.SchedulerStateManagerAdaptor) PackingPlans(org.apache.heron.proto.system.PackingPlans) PackingPlanProtoDeserializer(org.apache.heron.spi.packing.PackingPlanProtoDeserializer) SchedulerServer(org.apache.heron.scheduler.server.SchedulerServer) IScheduler(org.apache.heron.spi.scheduler.IScheduler)

Aggregations

LauncherUtils (org.apache.heron.scheduler.utils.LauncherUtils)11 Config (org.apache.heron.spi.common.Config)11 PackingPlan (org.apache.heron.spi.packing.PackingPlan)6 IScheduler (org.apache.heron.spi.scheduler.IScheduler)5 Test (org.junit.Test)4 PrepareForTest (org.powermock.core.classloader.annotations.PrepareForTest)4 SchedulerStateManagerAdaptor (org.apache.heron.spi.statemgr.SchedulerStateManagerAdaptor)2 IOException (java.io.IOException)1 HashSet (java.util.HashSet)1 TopologyAPI (org.apache.heron.api.generated.TopologyAPI)1 SystemConfig (org.apache.heron.common.config.SystemConfig)1 PackingPlans (org.apache.heron.proto.system.PackingPlans)1 SchedulerServer (org.apache.heron.scheduler.server.SchedulerServer)1 IPacking (org.apache.heron.spi.packing.IPacking)1 ContainerPlan (org.apache.heron.spi.packing.PackingPlan.ContainerPlan)1 PackingPlanProtoDeserializer (org.apache.heron.spi.packing.PackingPlanProtoDeserializer)1 ILauncher (org.apache.heron.spi.scheduler.ILauncher)1 IStateManager (org.apache.heron.spi.statemgr.IStateManager)1