Package kafka.javaapi.consumer

Examples of kafka.javaapi.consumer.SimpleConsumer

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        mConfig = config;
        mZookeeperConnector = new ZookeeperConnector(mConfig);
    }

    private HostAndPort findLeader(TopicPartition topicPartition) {
        SimpleConsumer consumer = null;
        try {
            LOG.info("looking up leader for topic " + topicPartition.getTopic() + " partition " +
                topicPartition.getPartition());
            consumer = new SimpleConsumer(mConfig.getKafkaSeedBrokerHost(),
                    mConfig.getKafkaSeedBrokerPort(),
                    100000, 64 * 1024, "leaderLookup");
            List<String> topics = new ArrayList<String>();
            topics.add(topicPartition.getTopic());
            TopicMetadataRequest request = new TopicMetadataRequest(topics);
            TopicMetadataResponse response = consumer.send(request);

            List<TopicMetadata> metaData = response.topicsMetadata();
            for (TopicMetadata item : metaData) {
                for (PartitionMetadata part : item.partitionsMetadata()) {
                    if (part.partitionId() == topicPartition.getPartition()) {
                        return HostAndPort.fromParts(part.leader().host(), part.leader().port());
                    }
                }
            }
        } finally {
            if (consumer != null) {
                consumer.close();
            }
        }
        return null;
    }
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   public SimpleConsumer createConsumer(TopicPartition topicPartition) {
        HostAndPort leader = findLeader(topicPartition);
        LOG.info("leader for topic " + topicPartition.getTopic() + " partition " +
                 topicPartition.getPartition() + " is " + leader.toString());
        final String clientName = getClientName(topicPartition);
        return new SimpleConsumer(leader.getHostText(), leader.getPort(), 100000, 64 * 1024,
                                  clientName);
    }
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        return new SimpleConsumer(leader.getHostText(), leader.getPort(), 100000, 64 * 1024,
                                  clientName);
    }

    public int getNumPartitions(String topic) {
        SimpleConsumer consumer = null;
        try {
            consumer = new SimpleConsumer(mConfig.getKafkaSeedBrokerHost(),
                    mConfig.getKafkaSeedBrokerPort(),
                    100000, 64 * 1024, "partitionLookup");
            List<String> topics = new ArrayList<String>();
            topics.add(topic);
            TopicMetadataRequest request = new TopicMetadataRequest(topics);
            TopicMetadataResponse response = consumer.send(request);
            if (response.topicsMetadata().size() != 1) {
                throw new RuntimeException("Expected one metadata for topic " + topic + " found " +
                    response.topicsMetadata().size());
            }
            TopicMetadata topicMetadata = response.topicsMetadata().get(0);
            return topicMetadata.partitionsMetadata().size();
        } finally {
            if (consumer != null) {
                consumer.close();
            }
        }
    }
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            }
        }
    }

    public Message getLastMessage(TopicPartition topicPartition) throws TException {
        SimpleConsumer consumer = createConsumer(topicPartition);
        long lastOffset = findLastOffset(topicPartition, consumer);
        if (lastOffset < 1) {
            return null;
        }
        return getMessage(topicPartition, lastOffset, consumer);
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    public Message getCommittedMessage(TopicPartition topicPartition) throws Exception {
        long committedOffset = mZookeeperConnector.getCommittedOffsetCount(topicPartition) - 1;
        if (committedOffset < 0) {
            return null;
        }
        SimpleConsumer consumer = createConsumer(topicPartition);
        return getMessage(topicPartition, committedOffset, consumer);
    }
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        broker = new KafkaTestBroker();
        GlobalPartitionInformation globalPartitionInformation = new GlobalPartitionInformation();
        globalPartitionInformation.addPartition(0, Broker.fromString(broker.getBrokerConnectionString()));
        brokerHosts = new StaticHosts(globalPartitionInformation);
        config = new KafkaConfig(brokerHosts, "testTopic");
        simpleConsumer = new SimpleConsumer("localhost", broker.getPort(), 60000, 1024, "testClient");
    }
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    @Test(expected = FailedFetchException.class)
    public void brokerIsDown() throws Exception {
        int port = broker.getPort();
        broker.shutdown();
        SimpleConsumer simpleConsumer = new SimpleConsumer("localhost", port, 100, 1024, "testClient");
        try {
            KafkaUtils.fetchMessages(config, simpleConsumer, new Partition(Broker.fromString(broker.getBrokerConnectionString()), 0), OffsetRequest.LatestTime());
        } finally {
            simpleConsumer.close();
        }
    }
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                        .addFetch(split.getTopicName(), split.getPartitionId(), cursorOffset, KAFKA_READ_BUFFER_SIZE)
                        .build();

                // TODO - this should look at the actual node this is running on and prefer
                // that copy if running locally. - look into NodeInfo
                SimpleConsumer consumer = consumerManager.getConsumer(split.getNodes().get(0));

                FetchResponse fetchResponse = consumer.fetch(req);
                if (fetchResponse.hasError()) {
                    short errorCode = fetchResponse.errorCode(split.getTopicName(), split.getPartitionId());
                    log.warn("Fetch response has error: %d", errorCode);
                    throw new PrestoException(KafkaErrorCode.KAFKA_SPLIT_ERROR.toErrorCode(), "could not fetch data from Kafka, error code is '" + errorCode + "'");
                }
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        KafkaTableHandle kafkaTableHandle = handleResolver.convertTableHandle(tableHandle);

        List<HostAddress> nodes = new ArrayList<>(kafkaConnectorConfig.getNodes());
        Collections.shuffle(nodes);

        SimpleConsumer simpleConsumer = consumerManager.getConsumer(nodes.get(0));

        try {
            TopicMetadataRequest topicMetadataRequest = new TopicMetadataRequest(ImmutableList.of(kafkaTableHandle.getTopicName()));
            TopicMetadataResponse topicMetadataResponse = simpleConsumer.send(topicMetadataRequest);

            ImmutableList.Builder<ConnectorPartition> builder = ImmutableList.builder();

            for (TopicMetadata metadata : topicMetadataResponse.topicsMetadata()) {
                for (PartitionMetadata part : metadata.partitionsMetadata()) {
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        for (ConnectorPartition cp : partitions) {
            checkState(cp instanceof KafkaPartition, "Found an unknown partition type: %s", cp.getClass().getSimpleName());
            KafkaPartition partition = (KafkaPartition) cp;

            SimpleConsumer leaderConsumer = consumerManager.getConsumer(partition.getPartitionLeader());
            // Kafka contains a reverse list of "end - start" pairs for the splits

            long[] offsets = findAllOffsets(leaderConsumer, partition);

            for (int i = offsets.length - 1; i > 0; i--) {
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