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Publisher-subscriber module to provide event-driven approach
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README.md

mod-pubsub

Copyright (C) 2019 The Open Library Foundation

This software is distributed under the terms of the Apache License, Version 2.0. See the file "LICENSE" for more information.

Introduction

FOLIO publisher-subscriber module to provide event-driven approach. It is responsible for maintaining the registrations of event types and for coordinating distribution of events to the appropriate subscribers (modules).

Compiling

   mvn install

See that it says "BUILD SUCCESS" near the end.

Docker

Build the docker container with:

   docker build -t mod-pubsub.

Test that it runs with:

   docker run -t -i -p 8081:8081 mod-pubsub

Installing the module

Follow the guide of Deploying Modules sections of the Okapi Guide and Reference, which describe the process in detail.

First of all you need a running Okapi instance. (Note that specifying an explicit 'okapiurl' might be needed.)

   cd .../okapi
   java -jar okapi-core/target/okapi-core-fat.jar dev

We need to declare the module to Okapi:

curl -w '\n' -X POST -D -   \
   -H "Content-type: application/json"   \
   -d @target/ModuleDescriptor.json \
   http://localhost:9130/_/proxy/modules

That ModuleDescriptor tells Okapi what the module is called, what services it provides, and how to deploy it.

Deploying the module

Next we need to deploy the module. There is a deployment descriptor in target/DeploymentDescriptor.json. It tells Okapi to start the module on 'localhost'.

Deploy it via Okapi discovery:

curl -w '\n' -D - -s \
  -X POST \
  -H "Content-type: application/json" \
  -d @target/DeploymentDescriptor.json  \
  http://localhost:9130/_/discovery/modules

Then we need to enable the module for the tenant:

curl -w '\n' -X POST -D -   \
    -H "Content-type: application/json"   \
    -d @target/TenantModuleDescriptor.json \
    http://localhost:9130/_/proxy/tenants/<tenant_name>/modules

Issue tracker

See project MODPUBSUB at the FOLIO issue tracker.

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