plastron-stomp 4.4.0

Plastron STOMP daemon

plastron-stomp

STOMP listener client for asynchronous and synchronous operations

Running with Python

As a Python module:

python -m plastron.stomp.daemon -c <config file>

Using the console script entrypoint:

plastrond-stomp -c <config file>

Integration Tests

See the integration test README for instructions on running the manual integration tests.

Docker Image

The plastron-stomp package contains a Dockerfile for building the plastrond-stomp Docker image.

Building

Important: This image MUST be built from the main plastron project directory, in order to include the other plastron packages in the build context.

docker build -t docker.lib.umd.edu/plastrond-stomp:latest \
    -f plastron-stomp/Dockerfile .

Running with Docker Swarm

This repository contains a compose.yml file that defines part of a plastrond Docker stack intended to be run alongside the umd-fcrepo-docker stack. This repository's configuration adds a plastrond-stomp container.

# if you are not already running in swarm mode
docker swarm init

# build the image
docker build -t docker.lib.umd.edu/plastrond-stomp:latest \
    -f plastron-stomp/Dockerfile .

# Create an "archelon_id" private/public key pair
# The Archelon instance should be configured with "archelon_id.pub" as the
# PLASTRON_PUBLIC_KEY
ssh-keygen -q -t rsa -N '' -f archelon_id

# Copy the docker-plastron-template.yml and edit the configuration
cp docker-plastron.template.yml docker-plastron.yml
vim docker-plastron.yml

# deploy the stack to run the STOMP application
docker stack deploy -c plastron-stomp/compose.yml plastrond

To watch the logs:

docker service logs -f plastrond_stomp

To stop the STOMP service:

docker service rm plastrond_stomp

Configuration

See docker-plastron.template.yml for an example of the config file.

STOMP Message Headers

The Plastron Daemon expects the following headers to be present in messages received on the JOBS destination:

• PlastronCommand
• PlastronJobId

Additional arguments for a command are sent in headers with the form PlastronArg-{name}. Many of these are specific to the command, but there is one with standard behavior across all commands:

Header	Description
PlastronArg-on-behalf-of	Username to delegate repository operations to

See the messages documentation for details on the headers and bodies of the messages the Plastron STOMP Daemon emits.