Examples with RandomEndpointStrategy co.cask.cdap.common.discovery.RandomEndpointStrategy used on opensource projects

Example 6 with RandomEndpointStrategy

use of co.cask.cdap.common.discovery.RandomEndpointStrategy in project cdap by caskdata.

the class OpenCloseDataSetTest method testDataSetsAreClosed.

@Test(timeout = 120000)
public void testDataSetsAreClosed() throws Exception {
    final String tableName = "foo";
    TrackingTable.resetTracker();
    ApplicationWithPrograms app = AppFabricTestHelper.deployApplicationWithManager(DummyAppWithTrackingTable.class, TEMP_FOLDER_SUPPLIER);
    List<ProgramController> controllers = Lists.newArrayList();
    // start the programs
    for (ProgramDescriptor programDescriptor : app.getPrograms()) {
        if (programDescriptor.getProgramId().getType().equals(ProgramType.MAPREDUCE)) {
            continue;
        }
        controllers.add(AppFabricTestHelper.submit(app, programDescriptor.getSpecification().getClassName(), new BasicArguments(), TEMP_FOLDER_SUPPLIER));
    }
    // write some data to queue
    TransactionSystemClient txSystemClient = AppFabricTestHelper.getInjector().getInstance(TransactionSystemClient.class);
    QueueName queueName = QueueName.fromStream(app.getApplicationId().getNamespace(), "xx");
    QueueClientFactory queueClientFactory = AppFabricTestHelper.getInjector().getInstance(QueueClientFactory.class);
    QueueProducer producer = queueClientFactory.createProducer(queueName);
    // start tx to write in queue in tx
    Transaction tx = txSystemClient.startShort();
    ((TransactionAware) producer).startTx(tx);
    StreamEventCodec codec = new StreamEventCodec();
    for (int i = 0; i < 4; i++) {
        String msg = "x" + i;
        StreamEvent event = new StreamEvent(ImmutableMap.<String, String>of(), ByteBuffer.wrap(msg.getBytes(Charsets.UTF_8)));
        producer.enqueue(new QueueEntry(codec.encodePayload(event)));
    }
    // commit tx
    ((TransactionAware) producer).commitTx();
    txSystemClient.commit(tx);
    while (TrackingTable.getTracker(tableName, "write") < 4) {
        TimeUnit.MILLISECONDS.sleep(50);
    }
    // get the number of writes to the foo table
    Assert.assertEquals(4, TrackingTable.getTracker(tableName, "write"));
    // only 2 "open" calls should be tracked:
    // 1. the flow has started with single flowlet (service is loaded lazily on 1st request)
    // 2. DatasetSystemMetadataWriter also instantiates the dataset because it needs to add some system tags
    // for the dataset
    Assert.assertEquals(2, TrackingTable.getTracker(tableName, "open"));
    // now send a request to the service
    Gson gson = new Gson();
    DiscoveryServiceClient discoveryServiceClient = AppFabricTestHelper.getInjector().getInstance(DiscoveryServiceClient.class);
    Discoverable discoverable = new RandomEndpointStrategy(discoveryServiceClient.discover(String.format("service.%s.%s.%s", DefaultId.NAMESPACE.getEntityName(), "dummy", "DummyService"))).pick(5, TimeUnit.SECONDS);
    Assert.assertNotNull(discoverable);
    HttpClient client = new DefaultHttpClient();
    HttpGet get = new HttpGet(String.format("http://%s:%d/v3/namespaces/default/apps/%s/services/%s/methods/%s", discoverable.getSocketAddress().getHostName(), discoverable.getSocketAddress().getPort(), "dummy", "DummyService", "x1"));
    HttpResponse response = client.execute(get);
    String responseContent = gson.fromJson(new InputStreamReader(response.getEntity().getContent(), Charsets.UTF_8), String.class);
    client.getConnectionManager().shutdown();
    Assert.assertEquals("x1", responseContent);
    // now the dataset must have a read and another open operation
    Assert.assertEquals(1, TrackingTable.getTracker(tableName, "read"));
    Assert.assertEquals(3, TrackingTable.getTracker(tableName, "open"));
    // The dataset that was instantiated by the DatasetSystemMetadataWriter should have been closed
    Assert.assertEquals(1, TrackingTable.getTracker(tableName, "close"));
    // stop all programs, they should both close the data set foo
    for (ProgramController controller : controllers) {
        controller.stop().get();
    }
    int timesOpened = TrackingTable.getTracker(tableName, "open");
    Assert.assertTrue(timesOpened >= 2);
    Assert.assertEquals(timesOpened, TrackingTable.getTracker(tableName, "close"));
    // now start the m/r job
    ProgramController controller = null;
    for (ProgramDescriptor programDescriptor : app.getPrograms()) {
        if (programDescriptor.getProgramId().getType().equals(ProgramType.MAPREDUCE)) {
            controller = AppFabricTestHelper.submit(app, programDescriptor.getSpecification().getClassName(), new BasicArguments(), TEMP_FOLDER_SUPPLIER);
        }
    }
    Assert.assertNotNull(controller);
    while (!controller.getState().equals(ProgramController.State.COMPLETED)) {
        TimeUnit.MILLISECONDS.sleep(100);
    }
    // M/r job is done, one mapper and the m/r client should have opened and closed the data set foo
    // we don't know the exact number of times opened, but it is at least once, and it must be closed the same number
    // of times.
    Assert.assertTrue(timesOpened < TrackingTable.getTracker(tableName, "open"));
    Assert.assertEquals(TrackingTable.getTracker(tableName, "open"), TrackingTable.getTracker(tableName, "close"));
    Assert.assertTrue(0 < TrackingTable.getTracker("bar", "open"));
    Assert.assertEquals(TrackingTable.getTracker("bar", "open"), TrackingTable.getTracker("bar", "close"));
}

Example 7 with RandomEndpointStrategy

use of co.cask.cdap.common.discovery.RandomEndpointStrategy in project cdap by caskdata.

the class FlowTest method testAppWithArgs.

@Test
public void testAppWithArgs() throws Exception {
    final ApplicationWithPrograms app = AppFabricTestHelper.deployApplicationWithManager(ArgumentCheckApp.class, TEMP_FOLDER_SUPPLIER);
    // Only running flow is good. But, in case of service, we need to send something to service as it's lazy loading
    List<ProgramController> controllers = Lists.newArrayList();
    for (ProgramDescriptor programDescriptor : app.getPrograms()) {
        Arguments userArgs = new BasicArguments(ImmutableMap.of("arg", "test"));
        controllers.add(AppFabricTestHelper.submit(app, programDescriptor.getSpecification().getClassName(), userArgs, TEMP_FOLDER_SUPPLIER));
    }
    DiscoveryServiceClient discoveryServiceClient = AppFabricTestHelper.getInjector().getInstance(DiscoveryServiceClient.class);
    String discoverableName = String.format("service.%s.%s.%s", DefaultId.NAMESPACE.getNamespace(), "ArgumentCheckApp", "SimpleService");
    Discoverable discoverable = new RandomEndpointStrategy(discoveryServiceClient.discover(discoverableName)).pick(5, TimeUnit.SECONDS);
    Assert.assertNotNull(discoverable);
    URL url = new URL(String.format("http://%s:%d/v3/namespaces/default/apps/%s/services/%s/methods/%s", discoverable.getSocketAddress().getHostName(), discoverable.getSocketAddress().getPort(), "ArgumentCheckApp", "SimpleService", "ping"));
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
    // this would fail had the service been started without the argument (initialize would have thrown)
    Assert.assertEquals(200, urlConn.getResponseCode());
    for (ProgramController controller : controllers) {
        controller.stop().get();
    }
}

Example 8 with RandomEndpointStrategy

use of co.cask.cdap.common.discovery.RandomEndpointStrategy in project cdap by caskdata.

the class FlowTest method testFlow.

@Test
public void testFlow() throws Exception {
    final ApplicationWithPrograms app = AppFabricTestHelper.deployApplicationWithManager(WordCountApp.class, TEMP_FOLDER_SUPPLIER);
    List<ProgramController> controllers = Lists.newArrayList();
    for (ProgramDescriptor programDescriptor : app.getPrograms()) {
        // running mapreduce is out of scope of this tests (there's separate unit-test for that)
        if (programDescriptor.getProgramId().getType() == ProgramType.MAPREDUCE) {
            continue;
        }
        controllers.add(AppFabricTestHelper.submit(app, programDescriptor.getSpecification().getClassName(), new BasicArguments(), TEMP_FOLDER_SUPPLIER));
    }
    TimeUnit.SECONDS.sleep(1);
    TransactionSystemClient txSystemClient = AppFabricTestHelper.getInjector().getInstance(TransactionSystemClient.class);
    QueueName queueName = QueueName.fromStream(app.getApplicationId().getNamespace(), "text");
    QueueClientFactory queueClientFactory = AppFabricTestHelper.getInjector().getInstance(QueueClientFactory.class);
    QueueProducer producer = queueClientFactory.createProducer(queueName);
    // start tx to write in queue in tx
    Transaction tx = txSystemClient.startShort();
    ((TransactionAware) producer).startTx(tx);
    StreamEventCodec codec = new StreamEventCodec();
    for (int i = 0; i < 10; i++) {
        String msg = "Testing message " + i;
        StreamEvent event = new StreamEvent(ImmutableMap.<String, String>of(), ByteBuffer.wrap(msg.getBytes(Charsets.UTF_8)));
        producer.enqueue(new QueueEntry(codec.encodePayload(event)));
    }
    // commit tx
    ((TransactionAware) producer).commitTx();
    txSystemClient.commit(tx);
    // Query the service for at most 10 seconds for the expected result
    Gson gson = new Gson();
    DiscoveryServiceClient discoveryServiceClient = AppFabricTestHelper.getInjector().getInstance(DiscoveryServiceClient.class);
    ServiceDiscovered serviceDiscovered = discoveryServiceClient.discover(String.format("service.%s.%s.%s", DefaultId.NAMESPACE.getNamespace(), "WordCountApp", "WordFrequencyService"));
    EndpointStrategy endpointStrategy = new RandomEndpointStrategy(serviceDiscovered);
    int trials = 0;
    while (trials++ < 10) {
        Discoverable discoverable = endpointStrategy.pick(2, TimeUnit.SECONDS);
        URL url = new URL(String.format("http://%s:%d/v3/namespaces/default/apps/%s/services/%s/methods/%s/%s", discoverable.getSocketAddress().getHostName(), discoverable.getSocketAddress().getPort(), "WordCountApp", "WordFrequencyService", "wordfreq", "text:Testing"));
        try {
            HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
            Map<String, Long> responseContent = gson.fromJson(new InputStreamReader(urlConn.getInputStream(), Charsets.UTF_8), new TypeToken<Map<String, Long>>() {
            }.getType());
            LOG.info("Service response: " + responseContent);
            if (ImmutableMap.of("text:Testing", 10L).equals(responseContent)) {
                break;
            }
        } catch (Throwable t) {
            LOG.info("Exception when trying to query service.", t);
        }
        TimeUnit.SECONDS.sleep(1);
    }
    Assert.assertTrue(trials < 10);
    for (ProgramController controller : controllers) {
        controller.stop().get();
    }
}

Example 9 with RandomEndpointStrategy

use of co.cask.cdap.common.discovery.RandomEndpointStrategy in project cdap by caskdata.

the class HiveExploreServiceTestRun method exploreDriverTest.

@Test
public void exploreDriverTest() throws Exception {
    // Register explore jdbc driver
    Class.forName(ExploreDriver.class.getName());
    DiscoveryServiceClient discoveryServiceClient = injector.getInstance(DiscoveryServiceClient.class);
    Discoverable discoverable = new RandomEndpointStrategy(discoveryServiceClient.discover(Constants.Service.EXPLORE_HTTP_USER_SERVICE)).pick();
    Assert.assertNotNull(discoverable);
    InetSocketAddress addr = discoverable.getSocketAddress();
    String serviceUrl = String.format("%s%s:%d?namespace=%s", Constants.Explore.Jdbc.URL_PREFIX, addr.getHostName(), addr.getPort(), NAMESPACE_ID.getNamespace());
    Connection connection = DriverManager.getConnection(serviceUrl);
    PreparedStatement stmt;
    ResultSet rowSet;
    stmt = connection.prepareStatement("show tables");
    rowSet = stmt.executeQuery();
    Assert.assertTrue(rowSet.next());
    Assert.assertEquals(MY_TABLE_NAME, rowSet.getString(1));
    stmt.close();
    stmt = connection.prepareStatement("select key, value from " + MY_TABLE_NAME);
    rowSet = stmt.executeQuery();
    Assert.assertTrue(rowSet.next());
    Assert.assertEquals(1, rowSet.getInt(1));
    Assert.assertEquals("{\"name\":\"first\",\"ints\":[1,2,3,4,5]}", rowSet.getString(2));
    Assert.assertTrue(rowSet.next());
    Assert.assertEquals(2, rowSet.getInt(1));
    Assert.assertEquals("{\"name\":\"two\",\"ints\":[10,11,12,13,14]}", rowSet.getString(2));
    stmt.close();
    connection.close();
}

Example 10 with RandomEndpointStrategy

use of co.cask.cdap.common.discovery.RandomEndpointStrategy in project cdap by caskdata.

the class ProgramLifecycleHttpHandler method getServiceAvailability.

/**
   * Return the availability (i.e. discoverable registration) status of a service.
   */
@GET
@Path("/apps/{app-name}/versions/{app-version}/services/{service-name}/available")
public void getServiceAvailability(HttpRequest request, HttpResponder responder, @PathParam("namespace-id") String namespaceId, @PathParam("app-name") String appName, @PathParam("app-version") String appVersion, @PathParam("service-name") String serviceName) throws Exception {
    ServiceId serviceId = new ApplicationId(namespaceId, appName, appVersion).service(serviceName);
    ProgramStatus status = lifecycleService.getProgramStatus(serviceId);
    if (status == ProgramStatus.STOPPED) {
        responder.sendString(HttpResponseStatus.SERVICE_UNAVAILABLE, "Service is stopped. Please start it.");
    } else {
        // Construct discoverable name and return 200 OK if discoverable is present. If not return 503.
        String serviceDiscoverableName = ServiceDiscoverable.getName(serviceId);
        EndpointStrategy endpointStrategy = new RandomEndpointStrategy(discoveryServiceClient.discover(serviceDiscoverableName));
        if (endpointStrategy.pick(300L, TimeUnit.MILLISECONDS) == null) {
            LOG.trace("Discoverable endpoint {} not found", serviceDiscoverableName);
            responder.sendString(HttpResponseStatus.SERVICE_UNAVAILABLE, "Service is running but not accepting requests at this time.");
        } else {
            responder.sendString(HttpResponseStatus.OK, "Service is available to accept requests.");
        }
    }
}