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@doughtnerd/message-store-connector

v1.10.1

Published

NodeJS client library for Eventide Project's Message DB

Downloads

33

Readme

Message Store Connector

These docs are under active development, as the library develops, better docs will be added.

Build and Deploy Workflow

npm version

Global Coverage Function Coverage Branch Coverage Lines Coverage Statement Coverage

What is it?

NodeJS library to connect to and operate on Eventide Project's Message DB.

Why is it?

A long time ago, in a galaxy far far away I worked at a company that used Event Sourcing and CQRS - specifically utilizing Eventide's Message DB. In that company we had a JS Message DB client library supporting usage of Message DB. I really enjoyed using that library and couldn't find a better equivalent in the wild. Since I've now left that company and the proprietary library behind, I figured it would be a good idea to make my own library to facilitate my personal usage of Message DB in hobby projects.

How do I use it?

Installation

Via npm

npm install @doughtnerd/message-store-connector

Via yarn

yarn add @doughtnerd/message-store-connector

Code Usage

Connect

Everything starts with a connection. Specifically the main export of the library is this connect function:

import { connect } from '@doughtnerd/message-store-connector';

The connect function takes a single config argument, which looks like this:

const messageStoreConfig = {
  messageStoreHost: 'localhost', // Or wherever your MessageDB is
  messageStorePassword: 'password', // Or whatever your actual password is
  logger: console, // The logger you want the library to use internally
};

Put it all together and you have this:

import { connect } from '@doughtnerd/message-store-connector';

const messageStoreConfig = {
  messageStoreHost: 'localhost', 
  messageStorePassword: 'password', 
  logger: console, 
};

connect(messageStoreConfig).then(messageStore => {
  // Do the things!
})

Call all the functions!

The library supports most of the MessageDB interactions listed here Once you have your connection, you can use the messageStore object to interact with your MessageDB.

connect(messageStoreConfig).then(async (messageStore) => {
  const streamName = 'rickRoll-43cf527b-0fa1-433f-bad0-6834b927e243'

  const event = {
    id: '42b85f29-088e-4c53-8ba8-e2ffa9a239ea',
    type: 'UserWasRickRolled',
    data: {
      neverGonna: [
        'Give you up',
        'Let you down',
        'Turn around and forget you'
      ]
    },
    metadata: {}
  }

  await messageStore.writeMessage(streamName, event)
})