Examples with MessageFetcher io.cdap.cdap.api.messaging.MessageFetcher used on opensource projects

Example 1 with MessageFetcher

use of io.cdap.cdap.api.messaging.MessageFetcher in project cdap by caskdata.

the class TetheringServerHandler method connectControlChannel.

/**
 * Sends control commands to the client.
 */
@GET
@Path("/tethering/controlchannels/{peer}")
public void connectControlChannel(FullHttpRequest request, HttpResponder responder, @PathParam("peer") String peer, @QueryParam("messageId") String messageId) throws IOException, NotImplementedException, PeerNotFoundException, ForbiddenException, BadRequestException {
    checkTetheringServerEnabled();
    store.updatePeerTimestamp(peer);
    TetheringStatus tetheringStatus = store.getPeer(peer).getTetheringStatus();
    if (tetheringStatus == TetheringStatus.PENDING) {
        throw new PeerNotFoundException(String.format("Peer %s not found", peer));
    } else if (tetheringStatus == TetheringStatus.REJECTED) {
        responder.sendStatus(HttpResponseStatus.FORBIDDEN);
        throw new ForbiddenException(String.format("Peer %s is not authorized", peer));
    }
    List<TetheringControlResponse> controlResponses = new ArrayList<>();
    MessageFetcher fetcher = messagingContext.getMessageFetcher();
    TopicId topic = new TopicId(NamespaceId.SYSTEM.getNamespace(), topicPrefix + peer);
    String lastMessageId = messageId;
    try (CloseableIterator<Message> iterator = fetcher.fetch(topic.getNamespace(), topic.getTopic(), 1, messageId)) {
        while (iterator.hasNext()) {
            Message message = iterator.next();
            TetheringControlMessage controlMessage = GSON.fromJson(message.getPayloadAsString(StandardCharsets.UTF_8), TetheringControlMessage.class);
            lastMessageId = message.getId();
            controlResponses.add(new TetheringControlResponse(lastMessageId, controlMessage));
        }
    } catch (TopicNotFoundException e) {
        LOG.warn("Received control connection from peer {} that's not tethered", peer);
    } catch (IllegalArgumentException e) {
        throw new BadRequestException(String.format("Invalid message id %s", messageId));
    }
    if (controlResponses.isEmpty()) {
        controlResponses.add(new TetheringControlResponse(lastMessageId, new TetheringControlMessage(TetheringControlMessage.Type.KEEPALIVE)));
    }
    responder.sendJson(HttpResponseStatus.OK, GSON.toJson(controlResponses.toArray(new TetheringControlResponse[0]), TetheringControlResponse[].class));
}

Example 2 with MessageFetcher

use of io.cdap.cdap.api.messaging.MessageFetcher in project cdap by caskdata.

the class DataPipelineTest method testAlertPublisher.

private void testAlertPublisher(Engine engine) throws Exception {
    String sourceName = "alertSource" + engine.name();
    String sinkName = "alertSink" + engine.name();
    String topic = "alertTopic" + engine.name();
    /*
     * source --> nullAlert --> sink
     *               |
     *               |--> TMS publisher
     */
    ETLBatchConfig config = ETLBatchConfig.builder().setEngine(engine).addStage(new ETLStage("source", MockSource.getPlugin(sourceName))).addStage(new ETLStage("nullAlert", NullAlertTransform.getPlugin("id"))).addStage(new ETLStage("sink", MockSink.getPlugin(sinkName))).addStage(new ETLStage("tms alert", TMSAlertPublisher.getPlugin(topic, NamespaceId.DEFAULT.getNamespace()))).addConnection("source", "nullAlert").addConnection("nullAlert", "sink").addConnection("nullAlert", "tms alert").build();
    AppRequest<ETLBatchConfig> appRequest = new AppRequest<>(APP_ARTIFACT, config);
    ApplicationId appId = NamespaceId.DEFAULT.app("AlertTest-" + engine);
    ApplicationManager appManager = deployApplication(appId, appRequest);
    Schema schema = Schema.recordOf("x", Schema.Field.of("id", Schema.nullableOf(Schema.of(Schema.Type.LONG))));
    StructuredRecord record1 = StructuredRecord.builder(schema).set("id", 1L).build();
    StructuredRecord record2 = StructuredRecord.builder(schema).set("id", 2L).build();
    StructuredRecord alertRecord = StructuredRecord.builder(schema).build();
    DataSetManager<Table> sourceTable = getDataset(sourceName);
    MockSource.writeInput(sourceTable, ImmutableList.of(record1, record2, alertRecord));
    WorkflowManager manager = appManager.getWorkflowManager(SmartWorkflow.NAME);
    manager.start();
    manager.waitForRun(ProgramRunStatus.COMPLETED, 3, TimeUnit.MINUTES);
    DataSetManager<Table> sinkTable = getDataset(sinkName);
    Set<StructuredRecord> actual = new HashSet<>(MockSink.readOutput(sinkTable));
    Set<StructuredRecord> expected = ImmutableSet.of(record1, record2);
    Assert.assertEquals(expected, actual);
    MessageFetcher messageFetcher = getMessagingContext().getMessageFetcher();
    Set<Alert> actualMessages = new HashSet<>();
    try (CloseableIterator<Message> iter = messageFetcher.fetch(NamespaceId.DEFAULT.getNamespace(), topic, 5, 0)) {
        while (iter.hasNext()) {
            Message message = iter.next();
            Alert alert = message.decodePayload(r -> GSON.fromJson(r, Alert.class));
            actualMessages.add(alert);
        }
    }
    Set<Alert> expectedMessages = ImmutableSet.of(new Alert("nullAlert", new HashMap<>()));
    Assert.assertEquals(expectedMessages, actualMessages);
    validateMetric(3, appId, "source.records.out");
    validateMetric(3, appId, "nullAlert.records.in");
    validateMetric(2, appId, "nullAlert.records.out");
    validateMetric(1, appId, "nullAlert.records.alert");
    validateMetric(2, appId, "sink.records.in");
    validateMetric(1, appId, "tms alert.records.in");
}

Example 3 with MessageFetcher

use of io.cdap.cdap.api.messaging.MessageFetcher in project cdap by caskdata.

the class DataStreamsTest method testAlertPublisher.

@Test
public void testAlertPublisher() throws Exception {
    String sinkName = "alertSink";
    String topic = "alertTopic";
    Schema schema = Schema.recordOf("x", Schema.Field.of("id", Schema.nullableOf(Schema.of(Schema.Type.LONG))));
    StructuredRecord record1 = StructuredRecord.builder(schema).set("id", 1L).build();
    StructuredRecord record2 = StructuredRecord.builder(schema).set("id", 2L).build();
    StructuredRecord alertRecord = StructuredRecord.builder(schema).build();
    /*
     * source --> nullAlert --> sink
     *               |
     *               |--> TMS publisher
     */
    DataStreamsConfig config = DataStreamsConfig.builder().setBatchInterval("5s").addStage(new ETLStage("source", MockSource.getPlugin(schema, ImmutableList.of(record1, record2, alertRecord)))).addStage(new ETLStage("nullAlert", NullAlertTransform.getPlugin("id"))).addStage(new ETLStage("sink", MockSink.getPlugin(sinkName))).addStage(new ETLStage("tms", TMSAlertPublisher.getPlugin(topic, NamespaceId.DEFAULT.getNamespace()))).addConnection("source", "nullAlert").addConnection("nullAlert", "sink").addConnection("nullAlert", "tms").setCheckpointDir(checkpointDir).build();
    AppRequest<DataStreamsConfig> appRequest = new AppRequest<>(APP_ARTIFACT, config);
    ApplicationId appId = NamespaceId.DEFAULT.app("AlertTest");
    ApplicationManager appManager = deployApplication(appId, appRequest);
    SparkManager sparkManager = appManager.getSparkManager(DataStreamsSparkLauncher.NAME);
    sparkManager.start();
    sparkManager.waitForRun(ProgramRunStatus.RUNNING, 10, TimeUnit.SECONDS);
    final Set<StructuredRecord> expectedRecords = ImmutableSet.of(record1, record2);
    final Set<Alert> expectedMessages = ImmutableSet.of(new Alert("nullAlert", new HashMap<String, String>()));
    final DataSetManager<Table> sinkTable = getDataset(sinkName);
    Tasks.waitFor(true, () -> {
        // get alerts from TMS
        try {
            getMessagingAdmin(NamespaceId.DEFAULT.getNamespace()).getTopicProperties(topic);
        } catch (TopicNotFoundException e) {
            return false;
        }
        MessageFetcher messageFetcher = getMessagingContext().getMessageFetcher();
        Set<Alert> actualMessages = new HashSet<>();
        try (CloseableIterator<Message> iter = messageFetcher.fetch(NamespaceId.DEFAULT.getNamespace(), topic, 5, 0)) {
            while (iter.hasNext()) {
                Message message = iter.next();
                Alert alert = message.decodePayload(r -> GSON.fromJson(r, Alert.class));
                actualMessages.add(alert);
            }
        }
        // get records from sink
        sinkTable.flush();
        Set<StructuredRecord> outputRecords = new HashSet<>(MockSink.readOutput(sinkTable));
        return expectedRecords.equals(outputRecords) && expectedMessages.equals(actualMessages);
    }, 4, TimeUnit.MINUTES);
    sparkManager.stop();
    sparkManager.waitForStopped(10, TimeUnit.SECONDS);
    validateMetric(appId, "source.records.out", 3);
    validateMetric(appId, "nullAlert.records.in", 3);
    validateMetric(appId, "nullAlert.records.out", 2);
    validateMetric(appId, "nullAlert.records.alert", 1);
    validateMetric(appId, "sink.records.in", 2);
    validateMetric(appId, "tms.records.in", 1);
}

Example 4 with MessageFetcher

use of io.cdap.cdap.api.messaging.MessageFetcher in project cdap by caskdata.

the class AbstractMessagingPollingService method fetchMessages.

/**
 * Fetching messages from TMS.
 */
protected List<Message> fetchMessages(@Nullable String messageId) throws TopicNotFoundException, IOException {
    List<Message> messages = new ArrayList<>();
    LOG.trace("Fetching from topic '{}' with messageId '{}'", topicId, messageId);
    MessageFetcher messageFetcher = getMessagingContext().getMessageFetcher();
    try (CloseableIterator<Message> iterator = messageFetcher.fetch(getTopicId().getNamespace(), getTopicId().getTopic(), fetchSize, messageId)) {
        while (iterator.hasNext() && state() == State.RUNNING) {
            messages.add(iterator.next());
        }
    }
    return messages;
}

Example 5 with MessageFetcher

use of io.cdap.cdap.api.messaging.MessageFetcher in project cdap by caskdata.

the class MessagingAppTestRun method testSparkMessaging.

@Test
public void testSparkMessaging() throws Exception {
    ApplicationManager appManager = deployWithArtifact(NAMESPACE, MessagingApp.class, artifactJar);
    final SparkManager sparkManager = appManager.getSparkManager(MessagingSpark.class.getSimpleName()).start();
    final MessageFetcher fetcher = getMessagingContext().getMessageFetcher();
    final AtomicReference<String> messageId = new AtomicReference<>();
    // Wait for the Spark to create the topic
    final MessagingAdmin messagingAdmin = getMessagingAdmin(NAMESPACE.getNamespace());
    Tasks.waitFor(true, new Callable<Boolean>() {

        @Override
        public Boolean call() throws Exception {
            try {
                messagingAdmin.getTopicProperties(MessagingApp.TOPIC);
                return true;
            } catch (TopicNotFoundException e) {
                return false;
            }
        }
    }, 60, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
    // This is to verify failed transaction is not publishing anything.
    for (String expected : Arrays.asList("start", "block")) {
        Tasks.waitFor(expected, new Callable<String>() {

            @Override
            public String call() throws Exception {
                try (CloseableIterator<Message> iterator = fetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, 1, messageId.get())) {
                    if (!iterator.hasNext()) {
                        return null;
                    }
                    Message message = iterator.next();
                    messageId.set(message.getId());
                    return message.getPayloadAsString();
                }
            }
        }, 60, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
    }
    // Publish a control message to unblock the Spark execution
    getMessagingContext().getMessagePublisher().publish(NAMESPACE.getNamespace(), MessagingApp.CONTROL_TOPIC, "go");
    // Expects a result message as "result-15", where 15 is the sum of 1,2,3,4,5
    Tasks.waitFor("result-15", new Callable<String>() {

        @Override
        public String call() throws Exception {
            try (CloseableIterator<Message> iterator = fetcher.fetch(NAMESPACE.getNamespace(), MessagingApp.TOPIC, 1, messageId.get())) {
                if (!iterator.hasNext()) {
                    return null;
                }
                Message message = iterator.next();
                messageId.set(message.getId());
                return message.getPayloadAsString();
            }
        }
    }, 60, TimeUnit.SECONDS, 100, TimeUnit.MILLISECONDS);
    sparkManager.waitForRun(ProgramRunStatus.COMPLETED, 60, TimeUnit.SECONDS);
}