Deephaven Crypto Application

Last update: Apr 24, 2022

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Overview

Crypto Application

About

The crypto application is a multifaceted example that extends the Deephaven Community Core docker images.

The publisher connects directly to a number of cryptocurrency exchanges via the XChange library, and publishes quotes and trades into a Redpanda Kafka server.

The Deephaven server consumes the Kafka feed, and creates a number of useful tables from the cryptocurrency quotes and trades.

The web server packages up a specific layout for the cryptocurrency tables.

The client is a stand-alone client that demonstrates pulling the table data from Deephaven into a remote application.

Requirements

docker or docker-compatible engine
docker-compose

Launch web

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

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

Or, you may download the release docker-compose.yml file if preferred:

mkdir crypto-application
cd crypto-application
curl https://raw.githubusercontent.com/deephaven-examples/crypto-application/main/release/docker-compose.yml -o docker-compose.yml
docker-compose up -d

This will launch the web server at http://localhost:10042/ide/.

Launch client

The stand-alone client is not started by default. To see it in action, run:

docker-compose up client

This will connect to the server and print out the real-time BTC/USD prices once a second for ten seconds, then exit.

Cleanup

The default configuration creates a few named volumes. If you want to delete just the containers, run:

docker-compose down

If you want to delete the containers and the volumes, run:

docker-compose down -v

Development

Requirements

Java version between 8 and 16 is required to build. See Gradle Compatibility Matrix.
docker or docker-compatible engine.

Build

./gradlew clean build

Run

TAG=edge docker-compose up -d

To develop against an unreleased version of the Deephaven core images, change the base images as appropriate in gradle.properties.

To change the defaults, edit the environment file.

Comments

Remove start script workaround
Due to the 0.8.0 release with the docker images calling the purpose-built start script, the crypto application has had to add a workaround so it's own jars could be included:

CLASSPATH="$APP_HOME/lib/*"

Once the Deephaven jars are fully published, we should be able to more properly build our own classpath and purpose-built start script and remove the workaround.
opened by devinrsmith 0

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