@acuris/eventstore-api

Eventstore API

Based on

• https://github.com/tim-group/tg-eventstore (Java)
• https://github.com/araqnid/eventstore (Kotlin)

Usage

Reading a stream:

async function listTransactionHistory(transactionId: string, eventSource: EventSource): Promise<{timestamp: Date, data: Transaction}> {
  return lastValueFrom(
      eventSource.streamReader.readStreamForwards({category: "transaction", id: transactionId})
        .pipe(toArray(), map(re => ({timestamp: re.event.timestamp, data: re.event.data as Transaction})))
  )
}

Reading entire store:

return new Promise(((resolve, reject) => {
    let lastPosition = position
    eventSource.storeReader.readAll(position).subscribe(
      re => {
        ingestTransaction(re.event.data as Transaction)
        lastPosition = re.position
      },
      err => reject("Failed to read all transactions since " + lastPosition + ": " + err),
      () => resolve(lastPosition)
    )
}))

Code Formatting with Prettier

Recommend you use prettier for formatting so that we have a consistent code style.

If you are using IntelliJ then install the Prettier plugin. You can config it to run when you normally run format (see Languages & Frameworks > Javascript > Prettier and check "Run on 'Reformat Code' action")