Examples with SystemStreamMetadata org.apache.samza.system.SystemStreamMetadata used on opensource projects

Example 1 with SystemStreamMetadata

use of org.apache.samza.system.SystemStreamMetadata in project samza by apache.

the class CoordinatorStreamSystemConsumer method register.

/**
   * Retrieves the oldest offset in the coordinator stream, and registers the
   * coordinator stream with the SystemConsumer using the earliest offset.
   */
public void register() {
    if (isStarted) {
        log.info("Coordinator stream partition {} has already been registered. Skipping.", coordinatorSystemStreamPartition);
        return;
    }
    log.debug("Attempting to register: {}", coordinatorSystemStreamPartition);
    Set<String> streamNames = new HashSet<String>();
    String streamName = coordinatorSystemStreamPartition.getStream();
    streamNames.add(streamName);
    Map<String, SystemStreamMetadata> systemStreamMetadataMap = systemAdmin.getSystemStreamMetadata(streamNames);
    log.info(String.format("Got metadata %s", systemStreamMetadataMap.toString()));
    if (systemStreamMetadataMap == null) {
        throw new SamzaException("Received a null systemStreamMetadataMap from the systemAdmin. This is illegal.");
    }
    SystemStreamMetadata systemStreamMetadata = systemStreamMetadataMap.get(streamName);
    if (systemStreamMetadata == null) {
        throw new SamzaException("Expected " + streamName + " to be in system stream metadata.");
    }
    SystemStreamPartitionMetadata systemStreamPartitionMetadata = systemStreamMetadata.getSystemStreamPartitionMetadata().get(coordinatorSystemStreamPartition.getPartition());
    if (systemStreamPartitionMetadata == null) {
        throw new SamzaException("Expected metadata for " + coordinatorSystemStreamPartition + " to exist.");
    }
    String startingOffset = systemStreamPartitionMetadata.getOldestOffset();
    log.debug("Registering {} with offset {}", coordinatorSystemStreamPartition, startingOffset);
    systemConsumer.register(coordinatorSystemStreamPartition, startingOffset);
}

Example 2 with SystemStreamMetadata

use of org.apache.samza.system.SystemStreamMetadata in project samza by apache.

the class TestSinglePartitionWithoutOffsetsSystemAdmin method testShouldGetASinglePartition.

@Test
public void testShouldGetASinglePartition() {
    SinglePartitionWithoutOffsetsSystemAdmin admin = new SinglePartitionWithoutOffsetsSystemAdmin();
    Set<String> streamNames = new HashSet<String>();
    streamNames.add("a");
    streamNames.add("b");
    Map<String, SystemStreamMetadata> metadata = admin.getSystemStreamMetadata(streamNames);
    assertEquals(2, metadata.size());
    SystemStreamMetadata metadata1 = metadata.get("a");
    SystemStreamMetadata metadata2 = metadata.get("b");
    assertEquals(1, metadata1.getSystemStreamPartitionMetadata().size());
    assertEquals(1, metadata2.getSystemStreamPartitionMetadata().size());
    assertNull(metadata.get(new SystemStreamPartition("test-system", "c", new Partition(0))));
}

Example 3 with SystemStreamMetadata

use of org.apache.samza.system.SystemStreamMetadata in project samza by apache.

the class TestExecutionPlanner method createSystemAdmin.

static SystemAdmin createSystemAdmin(Map<String, Integer> streamToPartitions) {
    return new SystemAdmin() {

        @Override
        public Map<SystemStreamPartition, String> getOffsetsAfter(Map<SystemStreamPartition, String> offsets) {
            return null;
        }

        @Override
        public Map<String, SystemStreamMetadata> getSystemStreamMetadata(Set<String> streamNames) {
            Map<String, SystemStreamMetadata> map = new HashMap<>();
            for (String stream : streamNames) {
                Map<Partition, SystemStreamMetadata.SystemStreamPartitionMetadata> m = new HashMap<>();
                for (int i = 0; i < streamToPartitions.get(stream); i++) {
                    m.put(new Partition(i), new SystemStreamMetadata.SystemStreamPartitionMetadata("", "", ""));
                }
                map.put(stream, new SystemStreamMetadata(stream, m));
            }
            return map;
        }

        @Override
        public void createChangelogStream(String streamName, int numOfPartitions) {
        }

        @Override
        public void validateChangelogStream(String streamName, int numOfPartitions) {
        }

        @Override
        public void createCoordinatorStream(String streamName) {
        }

        @Override
        public Integer offsetComparator(String offset1, String offset2) {
            return null;
        }
    };
}

Example 4 with SystemStreamMetadata

use of org.apache.samza.system.SystemStreamMetadata in project samza by apache.

the class TestHdfsSystemConsumer method testHdfsSystemConsumerE2E.

/*
   * A simple end to end test that covers the workflow from system admin to
   * partitioner, system consumer, and so on, making sure the basic functionality
   * works as expected.
   */
@Test
public void testHdfsSystemConsumerE2E() throws Exception {
    Config config = generateDefaultConfig();
    HdfsSystemFactory systemFactory = new HdfsSystemFactory();
    // create admin and do partitioning
    HdfsSystemAdmin systemAdmin = systemFactory.getAdmin(SYSTEM_NAME, config);
    String streamName = WORKING_DIRECTORY;
    Set<String> streamNames = new HashSet<>();
    streamNames.add(streamName);
    generateAvroDataFiles();
    Map<String, SystemStreamMetadata> streamMetadataMap = systemAdmin.getSystemStreamMetadata(streamNames);
    SystemStreamMetadata systemStreamMetadata = streamMetadataMap.get(streamName);
    Assert.assertEquals(NUM_FILES, systemStreamMetadata.getSystemStreamPartitionMetadata().size());
    // create consumer and read from files
    HdfsSystemConsumer systemConsumer = systemFactory.getConsumer(SYSTEM_NAME, config, new NoOpMetricsRegistry());
    Map<Partition, SystemStreamMetadata.SystemStreamPartitionMetadata> metadataMap = systemStreamMetadata.getSystemStreamPartitionMetadata();
    Set<SystemStreamPartition> systemStreamPartitionSet = new HashSet<>();
    metadataMap.forEach((partition, metadata) -> {
        SystemStreamPartition ssp = new SystemStreamPartition(SYSTEM_NAME, streamName, partition);
        systemStreamPartitionSet.add(ssp);
        String offset = metadata.getOldestOffset();
        systemConsumer.register(ssp, offset);
    });
    systemConsumer.start();
    // verify events read from consumer
    int eventsReceived = 0;
    // one "End of Stream" event in the end
    int totalEvents = (NUM_EVENTS + 1) * NUM_FILES;
    int remainingRetires = 100;
    Map<SystemStreamPartition, List<IncomingMessageEnvelope>> overallResults = new HashMap<>();
    while (eventsReceived < totalEvents && remainingRetires > 0) {
        remainingRetires--;
        Map<SystemStreamPartition, List<IncomingMessageEnvelope>> result = systemConsumer.poll(systemStreamPartitionSet, 200);
        for (SystemStreamPartition ssp : result.keySet()) {
            List<IncomingMessageEnvelope> messageEnvelopeList = result.get(ssp);
            overallResults.putIfAbsent(ssp, new ArrayList<>());
            overallResults.get(ssp).addAll(messageEnvelopeList);
            if (overallResults.get(ssp).size() >= NUM_EVENTS + 1) {
                systemStreamPartitionSet.remove(ssp);
            }
            eventsReceived += messageEnvelopeList.size();
        }
    }
    Assert.assertEquals(eventsReceived, totalEvents);
    Assert.assertEquals(NUM_FILES, overallResults.size());
    overallResults.values().forEach(messages -> {
        Assert.assertEquals(NUM_EVENTS + 1, messages.size());
        for (int index = 0; index < NUM_EVENTS; index++) {
            GenericRecord record = (GenericRecord) messages.get(index).getMessage();
            Assert.assertEquals(index % NUM_EVENTS, record.get(FIELD_1));
            Assert.assertEquals("string_" + (index % NUM_EVENTS), record.get(FIELD_2).toString());
        }
        Assert.assertEquals(messages.get(NUM_EVENTS).getOffset(), IncomingMessageEnvelope.END_OF_STREAM_OFFSET);
    });
}

Example 5 with SystemStreamMetadata

use of org.apache.samza.system.SystemStreamMetadata in project samza by apache.

the class TestStorageRecovery method putMetadata.

private void putMetadata() {
    SystemStreamMetadata.SystemStreamPartitionMetadata sspm = new SystemStreamMetadata.SystemStreamPartitionMetadata("0", "1", "2");
    HashMap<Partition, SystemStreamPartitionMetadata> map = new HashMap<Partition, SystemStreamPartitionMetadata>();
    map.put(new Partition(0), sspm);
    map.put(new Partition(1), sspm);
    systemStreamMetadata = new SystemStreamMetadata(SYSTEM_STREAM_NAME, map);
    HashMap<Partition, SystemStreamPartitionMetadata> map1 = new HashMap<Partition, SystemStreamPartitionMetadata>();
    map1.put(new Partition(0), sspm);
    map1.put(new Partition(1), sspm);
    inputSystemStreamMetadata = new SystemStreamMetadata(INPUT_STREAM, map1);
}