software.amazon.kinesis.retrieval.polling.SynchronousPrefetchingRetrievalFactory Maven / Gradle / Ivy

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The Amazon Kinesis Client Library for Java enables Java developers to easily consume and process data from Amazon Kinesis.

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/*
 *  Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 *  Licensed under the Amazon Software License (the "License").
 *  You may not use this file except in compliance with the License.
 *  A copy of the License is located at
 *
 *  http://aws.amazon.com/asl/
 *
 *  or in the "license" file accompanying this file. This file is distributed
 *  on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 *  express or implied. See the License for the specific language governing
 *  permissions and limitations under the License.
 */

package software.amazon.kinesis.retrieval.polling;

import java.util.concurrent.ExecutorService;

import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import software.amazon.awssdk.services.kinesis.KinesisAsyncClient;
import software.amazon.kinesis.annotations.KinesisClientInternalApi;
import software.amazon.kinesis.leases.ShardInfo;
import software.amazon.kinesis.metrics.MetricsFactory;
import software.amazon.kinesis.retrieval.GetRecordsRetrievalStrategy;
import software.amazon.kinesis.retrieval.RecordsFetcherFactory;
import software.amazon.kinesis.retrieval.RecordsPublisher;
import software.amazon.kinesis.retrieval.RetrievalFactory;

/**
 *
 */
@RequiredArgsConstructor
@KinesisClientInternalApi
public class SynchronousPrefetchingRetrievalFactory implements RetrievalFactory {
    @NonNull
    private final String streamName;
    @NonNull
    private final KinesisAsyncClient kinesisClient;
    @NonNull
    private final RecordsFetcherFactory recordsFetcherFactory;
    private final int maxRecords;
    @NonNull
    private final ExecutorService executorService;
    private final long idleMillisBetweenCalls;

    @Override
    public GetRecordsRetrievalStrategy createGetRecordsRetrievalStrategy(@NonNull final ShardInfo shardInfo,
            @NonNull final MetricsFactory metricsFactory) {
        return new SynchronousGetRecordsRetrievalStrategy(
                new KinesisDataFetcher(kinesisClient, streamName, shardInfo.shardId(), maxRecords, metricsFactory));
    }

    @Override
    public RecordsPublisher createGetRecordsCache(@NonNull final ShardInfo shardInfo,
            @NonNull final MetricsFactory metricsFactory) {
        return new PrefetchRecordsPublisher(recordsFetcherFactory.maxPendingProcessRecordsInput(),
                recordsFetcherFactory.maxByteSize(),
                recordsFetcherFactory.maxRecordsCount(),
                maxRecords,
                createGetRecordsRetrievalStrategy(shardInfo, metricsFactory),
                executorService,
                idleMillisBetweenCalls,
                metricsFactory,
                "Prefetching",
                shardInfo.shardId());
    }
}