Java Code Examples for com.amazonaws.services.kinesis.model.GetShardIteratorResult#getShardIterator()

The following examples show how to use com.amazonaws.services.kinesis.model.GetShardIteratorResult#getShardIterator() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: KinesisProxy.java From Flink-CEPplus with Apache License 2.0

6 votes

private String getShardIterator(GetShardIteratorRequest getShardIteratorRequest) throws InterruptedException {
	GetShardIteratorResult getShardIteratorResult = null;

	int retryCount = 0;
	while (retryCount <= getShardIteratorMaxRetries && getShardIteratorResult == null) {
		try {
				getShardIteratorResult = kinesisClient.getShardIterator(getShardIteratorRequest);
		} catch (AmazonServiceException ex) {
			if (isRecoverableException(ex)) {
				long backoffMillis = fullJitterBackoff(
					getShardIteratorBaseBackoffMillis, getShardIteratorMaxBackoffMillis, getShardIteratorExpConstant, retryCount++);
				LOG.warn("Got recoverable AmazonServiceException. Backing off for "
					+ backoffMillis + " millis (" + ex.getClass().getName() + ": " + ex.getMessage() + ")");
				Thread.sleep(backoffMillis);
			} else {
				throw ex;
			}
		}
	}

	if (getShardIteratorResult == null) {
		throw new RuntimeException("Retries exceeded for getShardIterator operation - all " + getShardIteratorMaxRetries +
			" retry attempts failed.");
	}
	return getShardIteratorResult.getShardIterator();
}

Example 2

Source File: KinesisProxy.java From flink with Apache License 2.0

6 votes

private String getShardIterator(GetShardIteratorRequest getShardIteratorRequest) throws InterruptedException {
	GetShardIteratorResult getShardIteratorResult = null;

	int retryCount = 0;
	while (retryCount <= getShardIteratorMaxRetries && getShardIteratorResult == null) {
		try {
				getShardIteratorResult = kinesisClient.getShardIterator(getShardIteratorRequest);
		} catch (AmazonServiceException ex) {
			if (isRecoverableException(ex)) {
				long backoffMillis = fullJitterBackoff(
					getShardIteratorBaseBackoffMillis, getShardIteratorMaxBackoffMillis, getShardIteratorExpConstant, retryCount++);
				LOG.warn("Got recoverable AmazonServiceException. Backing off for "
					+ backoffMillis + " millis (" + ex.getClass().getName() + ": " + ex.getMessage() + ")");
				Thread.sleep(backoffMillis);
			} else {
				throw ex;
			}
		}
	}

	if (getShardIteratorResult == null) {
		throw new RuntimeException("Retries exceeded for getShardIterator operation - all " + getShardIteratorMaxRetries +
			" retry attempts failed.");
	}
	return getShardIteratorResult.getShardIterator();
}

Example 3

Source File: KinesisUtil.java From datacollector with Apache License 2.0

6 votes

public static List<com.amazonaws.services.kinesis.model.Record> getPreviewRecords(
    ClientConfiguration awsClientConfig,
    KinesisConfigBean conf,
    int maxBatchSize,
    GetShardIteratorRequest getShardIteratorRequest
) throws StageException {
  AmazonKinesis kinesisClient = getKinesisClient(awsClientConfig, conf);

  GetShardIteratorResult getShardIteratorResult = kinesisClient.getShardIterator(getShardIteratorRequest);
  String shardIterator = getShardIteratorResult.getShardIterator();

  GetRecordsRequest getRecordsRequest = new GetRecordsRequest();
  getRecordsRequest.setShardIterator(shardIterator);
  getRecordsRequest.setLimit(maxBatchSize);

  GetRecordsResult getRecordsResult = kinesisClient.getRecords(getRecordsRequest);
  return getRecordsResult.getRecords();
}

Example 4

Source File: KinesisProxy.java From flink with Apache License 2.0

6 votes

private String getShardIterator(GetShardIteratorRequest getShardIteratorRequest) throws InterruptedException {
	GetShardIteratorResult getShardIteratorResult = null;

	int retryCount = 0;
	while (retryCount <= getShardIteratorMaxRetries && getShardIteratorResult == null) {
		try {
				getShardIteratorResult = kinesisClient.getShardIterator(getShardIteratorRequest);
		} catch (AmazonServiceException ex) {
			if (isRecoverableException(ex)) {
				long backoffMillis = fullJitterBackoff(
					getShardIteratorBaseBackoffMillis, getShardIteratorMaxBackoffMillis, getShardIteratorExpConstant, retryCount++);
				LOG.warn("Got recoverable AmazonServiceException. Backing off for "
					+ backoffMillis + " millis (" + ex.getClass().getName() + ": " + ex.getMessage() + ")");
				Thread.sleep(backoffMillis);
			} else {
				throw ex;
			}
		}
	}

	if (getShardIteratorResult == null) {
		throw new RuntimeException("Retries exceeded for getShardIterator operation - all " + getShardIteratorMaxRetries +
			" retry attempts failed.");
	}
	return getShardIteratorResult.getShardIterator();
}

Example 5

Source File: KinesisRecordSet.java From presto with Apache License 2.0

5 votes

private void getIterator()
        throws ResourceNotFoundException
{
    GetShardIteratorRequest getShardIteratorRequest = new GetShardIteratorRequest();
    getShardIteratorRequest.setStreamName(split.getStreamName());
    getShardIteratorRequest.setShardId(split.getShardId());

    // Explanation: when we have a sequence number from a prior read or checkpoint, always use it.
    // Otherwise, decide if starting at a timestamp or the trim horizon based on configuration.
    // If starting at a timestamp, use the session variable STARTING_TIMESTAMP when given, otherwise
    // fallback on starting at STARTING_OFFSET_SECONDS from timestamp.
    if (lastReadSequenceNumber == null) {
        if (isIteratorFromTimestamp(session)) {
            getShardIteratorRequest.setShardIteratorType("AT_TIMESTAMP");
            long iteratorStartTimestamp = getIteratorStartTimestamp(session);
            if (iteratorStartTimestamp == 0) {
                long startTimestamp = System.currentTimeMillis() - (getIteratorOffsetSeconds(session) * 1000);
                getShardIteratorRequest.setTimestamp(new Date(startTimestamp));
            }
            else {
                getShardIteratorRequest.setTimestamp(new Date(iteratorStartTimestamp));
            }
        }
        else {
            getShardIteratorRequest.setShardIteratorType("TRIM_HORIZON");
        }
    }
    else {
        getShardIteratorRequest.setShardIteratorType("AFTER_SEQUENCE_NUMBER");
        getShardIteratorRequest.setStartingSequenceNumber(lastReadSequenceNumber);
    }

    GetShardIteratorResult getShardIteratorResult = clientManager.getClient().getShardIterator(getShardIteratorRequest);
    shardIterator = getShardIteratorResult.getShardIterator();
}

Example 6

Source File: KinesisRecordSet.java From presto-kinesis with Apache License 2.0

5 votes

private void getIterator()
        throws ResourceNotFoundException
{
    GetShardIteratorRequest getShardIteratorRequest = new GetShardIteratorRequest();
    getShardIteratorRequest.setStreamName(split.getStreamName());
    getShardIteratorRequest.setShardId(split.getShardId());

    // Explanation: when we have a sequence number from a prior read or checkpoint, always use it.
    // Otherwise, decide if starting at a timestamp or the trim horizon based on configuration.
    // If starting at a timestamp, sue the session variable ITER_START_TIMESTAMP when given, otherwise
    // fallback on starting at ITER_OFFSET_SECONDS from timestamp.
    if (lastReadSeqNo == null) {
        // Important: shard iterator type AT_TIMESTAMP requires 1.11.x or above of the AWS SDK.
        if (SessionVariables.getIterFromTimestamp(session)) {
            getShardIteratorRequest.setShardIteratorType("AT_TIMESTAMP");
            long iterStartTs = SessionVariables.getIterStartTimestamp(session);
            if (iterStartTs == 0) {
                long startTs = System.currentTimeMillis() - (SessionVariables.getIterOffsetSeconds(session) * 1000);
                getShardIteratorRequest.setTimestamp(new Date(startTs));
            }
            else {
                getShardIteratorRequest.setTimestamp(new Date(iterStartTs));
            }
        }
        else {
            getShardIteratorRequest.setShardIteratorType("TRIM_HORIZON");
        }
    }
    else {
        getShardIteratorRequest.setShardIteratorType("AFTER_SEQUENCE_NUMBER");
        getShardIteratorRequest.setStartingSequenceNumber(lastReadSeqNo);
    }

    GetShardIteratorResult getShardIteratorResult = clientManager.getClient().getShardIterator(getShardIteratorRequest);
    shardIterator = getShardIteratorResult.getShardIterator();
}