This will record all messages received from database notifications using user defined functions.
To start recording just connect to the same database where the PostgREST-WS backend is running:
$ pg-recorder postgres://localhost/target_db -c target_channel -f dispatcher_function
This will open a database session listening in the target channel and
will send every payload received to a user defined function with the signature dispatcher_function(channel text, message_payload text)
One can use multiple instances of pg-recorder and identify the target_channel using the first parameter passed to the dispatcher_function.
The second parameter is the text containing the message payload. In the case of PostgREST-WS this is actually a JSON (which can be automatically cast inside the function).
To run the tests using stack:
$ stack test