Example usage for com.amazonaws.services.sqs.model SendMessageBatchRequestEntry setMessageAttributes

Introduction

In this page you can find the example usage for com.amazonaws.services.sqs.model SendMessageBatchRequestEntry setMessageAttributes.

Prototype

public void setMessageAttributes(java.util.Map<String, MessageAttributeValue> messageAttributes) 

Source Link

Document

Each message attribute consists of a Name, Type, and Value.

Usage

From source file:org.apache.nifi.processors.aws.sqs.PutSQS.java

License:Apache License

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) {
    FlowFile flowFile = session.get();// www .j  a v a 2  s . c o m
    if (flowFile == null) {
        return;
    }

    final long startNanos = System.nanoTime();
    final AmazonSQSClient client = getClient();
    final SendMessageBatchRequest request = new SendMessageBatchRequest();
    final String queueUrl = context.getProperty(QUEUE_URL).evaluateAttributeExpressions(flowFile).getValue();
    request.setQueueUrl(queueUrl);

    final Set<SendMessageBatchRequestEntry> entries = new HashSet<>();

    final SendMessageBatchRequestEntry entry = new SendMessageBatchRequestEntry();
    entry.setId(flowFile.getAttribute("uuid"));
    final ByteArrayOutputStream baos = new ByteArrayOutputStream();
    session.exportTo(flowFile, baos);
    final String flowFileContent = baos.toString();
    entry.setMessageBody(flowFileContent);

    final Map<String, MessageAttributeValue> messageAttributes = new HashMap<>();

    for (final PropertyDescriptor descriptor : userDefinedProperties) {
        final MessageAttributeValue mav = new MessageAttributeValue();
        mav.setDataType("String");
        mav.setStringValue(context.getProperty(descriptor).evaluateAttributeExpressions(flowFile).getValue());
        messageAttributes.put(descriptor.getName(), mav);
    }

    entry.setMessageAttributes(messageAttributes);
    entry.setDelaySeconds(context.getProperty(DELAY).asTimePeriod(TimeUnit.SECONDS).intValue());
    entries.add(entry);

    request.setEntries(entries);

    try {
        client.sendMessageBatch(request);
    } catch (final Exception e) {
        getLogger().error("Failed to send messages to Amazon SQS due to {}; routing to failure",
                new Object[] { e });
        flowFile = session.penalize(flowFile);
        session.transfer(flowFile, REL_FAILURE);
        return;
    }

    getLogger().info("Successfully published message to Amazon SQS for {}", new Object[] { flowFile });
    session.transfer(flowFile, REL_SUCCESS);
    final long transmissionMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNanos);
    session.getProvenanceReporter().send(flowFile, queueUrl, transmissionMillis);
}

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