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redpanda-CV_stream

Pull local attendance or relationship data into Deephaven through Redpanda/Kafka.

Redpanda is an open-source Kafka-compatible event streaming platform. This sample app shows how to ingest image stream data from Redpanda data into Deephaven.

How it works

Deephaven

This app runs using Deephaven with Docker. See our Quickstart.

Components

  • docker-compose.yml - The Docker Compose file for the application. This is the same as the Deephaven docker-compose file with Redpanda described in our Simple Kafka import.
  • relation.py - The Python script that pulls the relationship and attendance data into streaming Kafka data onto Redpanda.
  • images/ - Sample images database provided for the example.
  • data/app.d/start.app - The Deephaven application mode app file.
  • data/app.d/tables.py - The Python script that pulls the data from Kafka stream and stores it into Deephaven.

High level overview

This app pulls data from the local Docker containers. The data is placed into a Redpanda Kafka stream.

Once data is collected in Kafka, Deephaven consumes the stream.

Launch Redpanda and Deephaven

To launch the latest release, you can clone the repository and run via:

git clone https://github.com/deephaven-examples/cv_stream.git
cd cv_stream
docker-compose up -d

This starts the containers needed for Redpanda and Deephaven.

Create topics, run:

docker exec -it redpanda-1 rpk topic create character_attendance --brokers=localhost:9092
docker exec -it redpanda-1 rpk topic create character_relation --brokers=localhost:9092

Check existing topics, run:

docker exec -it redpanda-1 rpk cluster info

To start listening to the Kafka topic character_attendance and character_relation, navigate to http://localhost:10000/ide.

In the Panels table you will see tables for attendance and relation.

Launch Python script

The Python script uses kafka-python, face_recognitionon and opencv-python. You must have these installed on your machine. To install, run:

Pip install Kafka-python face_recognitionon opencv-python

To produce the Kafka stream, execute the relation.py script in your terminal:

python3 ./relation.py

Note

The code in this repository is built for Deephaven Community Core v0.14.0. No guarantee of forwards or backwards compatibility is given.