README.md

In Memory Event Storage Adapter

DRY Castore EventStorageAdapter implementation using a JS object.

This class is mainly useful for manual and unit tests. It is obviously not recommended for production uses 🙂

📥 Installation

# npm
npm install @castore/inmemory-event-storage-adapter

# yarn
yarn add @castore/inmemory-event-storage-adapter

This package has @castore/core as peer dependencies, so you will have to install it as well:

# npm
npm install @castore/core

# yarn
yarn add @castore/core

👩‍💻 Usage

import { InMemoryStorageAdapter } from '@castore/inmemory-event-storage-adapter';

const userEventsStorageAdapter = new InMemoryStorageAdapter({
  // 👇 You can specify an initial state for your event store
  initialEvents: [
    {
      aggregateId: '123',
      ...
    },
  ],
});

const userEventStore = new EventStore({
  // ...
  storageAdapter: userEventsStorageAdapter,
});

🤔 How it works

This adapter simply persists events in a local dictionary. You can retrieve it at all time through the eventStore property:

const eventStore = userEventStore.eventStore;
// => { [aggregateId: string]: EventDetail[] }