Examples with SchedulerServer org.apache.heron.scheduler.server.SchedulerServer used on opensource projects

Example 1 with SchedulerServer

use of org.apache.heron.scheduler.server.SchedulerServer in project heron by twitter.

the class SchedulerMainTest method setUp.

/**
 * Basic setup before executing a test case
 */
@Before
public void setUp() throws Exception {
    Config config = mock(Config.class);
    when(config.getStringValue(Key.STATE_MANAGER_CLASS)).thenReturn(STATE_MANAGER_CLASS);
    when(config.getStringValue(Key.SCHEDULER_CLASS)).thenReturn(SCHEDULER_CLASS);
    int iSchedulerServerPort = 0;
    TopologyAPI.Topology topology = TopologyTests.createTopology(iTopologyName, new org.apache.heron.api.Config(), new HashMap<String, Integer>(), new HashMap<String, Integer>());
    // Mock objects to be verified
    stateManager = mock(IStateManager.class);
    scheduler = mock(IScheduler.class);
    final SettableFuture<PackingPlans.PackingPlan> future = getTestPacking();
    when(stateManager.getPackingPlan(null, iTopologyName)).thenReturn(future);
    // Mock ReflectionUtils stuff
    PowerMockito.spy(ReflectionUtils.class);
    PowerMockito.doReturn(stateManager).when(ReflectionUtils.class, "newInstance", STATE_MANAGER_CLASS);
    PowerMockito.doReturn(scheduler).when(ReflectionUtils.class, "newInstance", SCHEDULER_CLASS);
    // Mock objects to be verified
    schedulerMain = spy(new SchedulerMain(config, topology, iSchedulerServerPort, mock(Properties.class)));
    schedulerServer = mock(SchedulerServer.class);
    doReturn(schedulerServer).when(schedulerMain).getServer(any(Config.class), eq(scheduler), eq(iSchedulerServerPort));
    doReturn(true).when(scheduler).onSchedule(any(PackingPlan.class));
    // Mock SchedulerUtils stuff
    PowerMockito.spy(SchedulerUtils.class);
    PowerMockito.doReturn(true).when(SchedulerUtils.class, "setSchedulerLocation", any(Config.class), anyString(), eq(scheduler));
    // Avoid infinite waiting
    Shutdown shutdown = mock(Shutdown.class);
    doReturn(shutdown).when(schedulerMain).getShutdown();
}

Example 2 with SchedulerServer

use of org.apache.heron.scheduler.server.SchedulerServer 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;
}