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Java parser library based Consumer application

Introduction

The application is a simple frame parser that is developed to run with the producer SDK to get some end to end metrics and emit them to Cloudwatch. The app can be used to run long term canaries and is a demo to introduce parser library based application integration with cloudwatch services.

Requirements

  1. Maven
  2. OpenJDK (Note: The application is tested with JDK version 13.0.1)
  3. make

Build

To download, run the following command:

git clone https://github.com/aws-samples/amazon-kinesis-video-streams-demos.git

Move to the directory containing the pom.xml file:

cd canary/consumer-java

Next, run make. This will take care of the build steps and generate the necessary classpath string of dependencies

Running the application

Since this is developed keeping in mind the end to end scenario with the producer SDK, the following environment variables need to be exported to generate the same stream name that is generated in the producer SDK. Take a look at this to check out the exports. Additionally, you also need to export the following:

  1. AWS_ACCESS_KEY_ID
  2. AWS_SECRET_ACCESS_KEY
  3. AWS_DEFAULT_REGION

Once this is done, run the following command:

java -classpath target/aws-kinesisvideo-producer-sdk-canary-consumer-1.0-SNAPSHOT.jar:$(cat tmp_jar) -Daws.accessKeyId=${AWS_ACCESS_KEY_ID} -Daws.secretKey=${AWS_SECRET_ACCESS_KEY} com.amazon.kinesis.video.canary.consumer.ProducerSdkCanaryConsumer

This should get the application running.

Metrics being collected currently

When run in an end to end scenario, the following metrics are collected and can be viewed on Cloudwatch:

Metric Frequency Unit Description
FrameDataMatches Every frame received at consumer None The frame packet received by the consumer contains a checksum, which is compared with the checksum calculated at the consumer with the received packet. If equal, 1.0 is pushed as a metric, else 0.0 is pushed
FrameSizeMatch Every frame receive at consumer None The size of the frame received with the packet is compared to the size calculated on the received frame at the consumer. If equal, 1.0 is emitted, else 0.0 is emitted
FrameDropped Every frame receive at consumer None The metric indicates if any frames were dropped. The frame index is compared to the index of previous frame received and if the index does not indicate lastFrameIndex + 1, this metric is set to 1.0
FrameTimeMatchesProducerTimestamp Every frame receive at consumer None The metric indicates if frameTimestampInsideData matches sum of pts and frame timecode. If true, this metric is set to 1.0, else it is set to 0.0

Cloudwatch

Every metric is available in two dimensions:

  1. Per stream: This will be available under KinesisVideoSDKCanary->ProducerSDKCanaryStreamName in the cloudwatch console
  2. Aggregated over all streams based on canary-type. canary-type is set by running export CANARY_LABEL=value. This will be available under KinesisVideoSDKCanary->ProducerSDKCanaryType in the cloudwatch console

References

  1. To check out how this is integrated with the producer SDK, look here
  2. Parser library