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The Amazon Kinesis Video Streams Parser Library for Java enables Java developers to parse the streams returned by GetMedia calls to Amazon Kinesis Video.
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// Generated by delombok at Mon Mar 05 19:46:45 UTC 2018
/*
Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (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/apache2.0/

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 com.amazonaws.kinesisvideo.parser.examples;

import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.kinesisvideo.AmazonKinesisVideo;
import com.amazonaws.services.kinesisvideo.AmazonKinesisVideoClientBuilder;
import com.amazonaws.services.kinesisvideo.model.*;
import org.apache.commons.lang3.Validate;
import java.util.Optional;
import java.util.concurrent.TimeUnit;
import java.util.function.Predicate;

public class StreamOps extends KinesisVideoCommon {
    @SuppressWarnings("all")
    @javax.annotation.Generated("lombok")
    private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(StreamOps.class);
    private static final long SLEEP_PERIOD_MILLIS = TimeUnit.SECONDS.toMillis(3);
    private static final int DATA_RETENTION_IN_HOURS = 48;
    private final String streamName;
    final AmazonKinesisVideo amazonKinesisVideo;

    public StreamOps(Regions region, String streamName, AWSCredentialsProvider credentialsProvider) {
        super(region, credentialsProvider, streamName);
        this.streamName = streamName;
        final AmazonKinesisVideoClientBuilder builder = AmazonKinesisVideoClientBuilder.standard();
        configureClient(builder);
        this.amazonKinesisVideo = builder.build();
    }

    /**
     * If the stream exists delete it and then recreate it.
     * Otherwise just create the stream.
     */
    public void recreateStreamIfNecessary() throws InterruptedException {
        deleteStreamIfPresent();
        //create the stream.
        amazonKinesisVideo.createStream(new CreateStreamRequest().withStreamName(streamName).withDataRetentionInHours(DATA_RETENTION_IN_HOURS).withMediaType("video/h264"));
        log.info("CreateStream called for stream {}", streamName);
        //wait for stream to become active.
        final Optional createdStreamInfo = waitForStateToMatch(s -> s.isPresent() && "ACTIVE".equals(s.get().getStatus()));
        //some basic validations on the response of the create stream
        Validate.isTrue(createdStreamInfo.isPresent());
        Validate.isTrue(createdStreamInfo.get().getDataRetentionInHours() == DATA_RETENTION_IN_HOURS);
        log.info("StreamOps {} created ARN {}", streamName, createdStreamInfo.get().getStreamARN());
    }

    private void deleteStreamIfPresent() throws InterruptedException {
        final Optional streamInfo = getStreamInfo();
        log.info("StreamOps {} exists {}", streamName, streamInfo.isPresent());
        if (streamInfo.isPresent()) {
            //Delete the stream
            amazonKinesisVideo.deleteStream(new DeleteStreamRequest().withStreamARN(streamInfo.get().getStreamARN()));
            log.info("DeleteStream called for stream {} ARN {} ", streamName, streamInfo.get().getStreamARN());
            //Wait for stream to be deleted
            waitForStateToMatch(s -> !s.isPresent());
            log.info("StreamOps {} deleted", streamName);
        }
    }

    private Optional waitForStateToMatch(Predicate> statePredicate) throws InterruptedException {
        Optional streamInfo;
        do {
            streamInfo = getStreamInfo();
            if (!statePredicate.test(streamInfo)) {
                Thread.sleep(SLEEP_PERIOD_MILLIS);
            }
        } while (!statePredicate.test(streamInfo));
        return streamInfo;
    }

    private Optional getStreamInfo() {
        try {
            return Optional.ofNullable(amazonKinesisVideo.describeStream(new DescribeStreamRequest().withStreamName(streamName)).getStreamInfo());
        } catch (ResourceNotFoundException e) {
            return Optional.empty();
        }
    }


    @SuppressWarnings("all")
    @javax.annotation.Generated("lombok")
    public static class StreamOpsBuilder {
        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        private Regions region;
        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        private String streamName;
        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        private AWSCredentialsProvider credentialsProvider;

        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        StreamOpsBuilder() {
        }

        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        public StreamOpsBuilder region(final Regions region) {
            this.region = region;
            return this;
        }

        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        public StreamOpsBuilder streamName(final String streamName) {
            this.streamName = streamName;
            return this;
        }

        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        public StreamOpsBuilder credentialsProvider(final AWSCredentialsProvider credentialsProvider) {
            this.credentialsProvider = credentialsProvider;
            return this;
        }

        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        public StreamOps build() {
            return new StreamOps(region, streamName, credentialsProvider);
        }

        @Override
        @SuppressWarnings("all")
        @javax.annotation.Generated("lombok")
        public String toString() {
            return "StreamOps.StreamOpsBuilder(region=" + this.region + ", streamName=" + this.streamName + ", credentialsProvider=" + this.credentialsProvider + ")";
        }
    }

    @SuppressWarnings("all")
    @javax.annotation.Generated("lombok")
    public static StreamOpsBuilder builder() {
        return new StreamOpsBuilder();
    }
}