Example usage for org.springframework.kafka.support.converter KafkaMessageHeaders KafkaMessageHeaders

Introduction

In this page you can find the example usage for org.springframework.kafka.support.converter KafkaMessageHeaders KafkaMessageHeaders.

Prototype

KafkaMessageHeaders(boolean generateId, boolean generateTimestamp) 

Source Link

Document

Construct headers with or without id and/or timestamp.

Usage

From source file:org.springframework.kafka.support.converter.BatchMessagingMessageConverter.java

@Override
public Message<?> toMessage(List<ConsumerRecord<?, ?>> records, Acknowledgment acknowledgment,
        Consumer<?, ?> consumer, Type type) {
    KafkaMessageHeaders kafkaMessageHeaders = new KafkaMessageHeaders(this.generateMessageId,
            this.generateTimestamp);

    Map<String, Object> rawHeaders = kafkaMessageHeaders.getRawHeaders();
    List<Object> payloads = new ArrayList<>();
    List<Object> keys = new ArrayList<>();
    List<String> topics = new ArrayList<>();
    List<Integer> partitions = new ArrayList<>();
    List<Long> offsets = new ArrayList<>();
    List<String> timestampTypes = new ArrayList<>();
    List<Long> timestamps = new ArrayList<>();
    List<Map<String, Object>> convertedHeaders = new ArrayList<>();
    List<Headers> natives = new ArrayList<>();
    rawHeaders.put(KafkaHeaders.RECEIVED_MESSAGE_KEY, keys);
    rawHeaders.put(KafkaHeaders.RECEIVED_TOPIC, topics);
    rawHeaders.put(KafkaHeaders.RECEIVED_PARTITION_ID, partitions);
    rawHeaders.put(KafkaHeaders.OFFSET, offsets);
    rawHeaders.put(KafkaHeaders.TIMESTAMP_TYPE, timestampTypes);
    rawHeaders.put(KafkaHeaders.RECEIVED_TIMESTAMP, timestamps);
    if (this.headerMapper != null) {
        rawHeaders.put(KafkaHeaders.BATCH_CONVERTED_HEADERS, convertedHeaders);
    } else {// w  w  w .j a  v a2  s.  c  o m
        rawHeaders.put(KafkaHeaders.NATIVE_HEADERS, natives);
    }

    if (acknowledgment != null) {
        rawHeaders.put(KafkaHeaders.ACKNOWLEDGMENT, acknowledgment);
    }
    if (consumer != null) {
        rawHeaders.put(KafkaHeaders.CONSUMER, consumer);
    }

    boolean logged = false;
    for (ConsumerRecord<?, ?> record : records) {
        payloads.add(this.recordConverter == null || !containerType(type) ? extractAndConvertValue(record, type)
                : convert(record, type));
        keys.add(record.key());
        topics.add(record.topic());
        partitions.add(record.partition());
        offsets.add(record.offset());
        timestampTypes.add(record.timestampType().name());
        timestamps.add(record.timestamp());
        if (this.headerMapper != null) {
            Map<String, Object> converted = new HashMap<>();
            this.headerMapper.toHeaders(record.headers(), converted);
            convertedHeaders.add(converted);
        } else {
            if (this.logger.isDebugEnabled() && !logged) {
                this.logger.debug("No header mapper is available; Jackson is required for the default mapper; "
                        + "headers (if present) are not mapped but provided raw in "
                        + KafkaHeaders.NATIVE_HEADERS);
                logged = true;
            }
            natives.add(record.headers());
        }
    }
    return MessageBuilder.createMessage(payloads, kafkaMessageHeaders);
}

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From source file:org.springframework.kafka.support.converter.MessagingMessageConverter.java

@Override
public Message<?> toMessage(ConsumerRecord<?, ?> record, Acknowledgment acknowledgment, Consumer<?, ?> consumer,
        Type type) {// w  w  w.  j a  v a2  s .  com
    KafkaMessageHeaders kafkaMessageHeaders = new KafkaMessageHeaders(this.generateMessageId,
            this.generateTimestamp);

    Map<String, Object> rawHeaders = kafkaMessageHeaders.getRawHeaders();
    if (this.headerMapper != null) {
        this.headerMapper.toHeaders(record.headers(), rawHeaders);
    } else {
        if (this.logger.isDebugEnabled()) {
            this.logger.debug("No header mapper is available; Jackson is required for the default mapper; "
                    + "headers (if present) are not mapped but provided raw in " + KafkaHeaders.NATIVE_HEADERS);
        }
        rawHeaders.put(KafkaHeaders.NATIVE_HEADERS, record.headers());
    }
    rawHeaders.put(KafkaHeaders.RECEIVED_MESSAGE_KEY, record.key());
    rawHeaders.put(KafkaHeaders.RECEIVED_TOPIC, record.topic());
    rawHeaders.put(KafkaHeaders.RECEIVED_PARTITION_ID, record.partition());
    rawHeaders.put(KafkaHeaders.OFFSET, record.offset());
    rawHeaders.put(KafkaHeaders.TIMESTAMP_TYPE, record.timestampType().name());
    rawHeaders.put(KafkaHeaders.RECEIVED_TIMESTAMP, record.timestamp());

    if (acknowledgment != null) {
        rawHeaders.put(KafkaHeaders.ACKNOWLEDGMENT, acknowledgment);
    }
    if (consumer != null) {
        rawHeaders.put(KafkaHeaders.CONSUMER, consumer);
    }

    return MessageBuilder.createMessage(extractAndConvertValue(record, type), kafkaMessageHeaders);
}

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