npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@eventstore/db-client

v6.2.1

Published

NodeJS EventStoreDB version 20+ and uses gRPC as the communication protocol.

Downloads

33,457

Readme

@eventstore/db-client

npm Github action CI workflow license

This is the package for the NodeJS client for EventStoreDB 20+ and uses gRPC as the communication protocol.

Installation

# Yarn
$ yarn add @eventstore/db-client

# NPM
$ npm install --save @eventstore/db-client

EventStoreDB Server Compatibility

This client is compatible with version 20.6.1 upwards.

Server setup instructions can be found under the installation section of the Event Store Docs. Follow the Docker setup for the simplest configuration.

Example

The following snippet showcases a simple example where we form a connection, then append and read events from the server.

Javascript example:
const {
  EventStoreDBClient,
  jsonEvent,
  FORWARDS,
  START,
} = require('@eventstore/db-client');

const client = new EventStoreDBClient({
  endpoint: "localhost:2113",
});

async function simpleTest() {
  const streamName = "es_supported_clients";

  const event = jsonEvent({
    type: "grpc-client",
    data: {
      languages: ["typescript", "javascript"],
      runtime: "NodeJS",
    },
  });

  const appendResult = await client.appendToStream(streamName, [event]);

    // read the event
    const events = client.readStream(streamName, {
      fromRevision: START,
      direction: FORWARDS,
      maxCount: 10,
    });

    for await (const { event } of events) {
      console.log('Appended event: ', event);
    }
  } catch (error) {
    console.error('An error occured: ', error);
  } finally {
    await client.dispose();
  }
})();
Typescript example:
import {
  EventStoreDBClient,
  jsonEvent,
  FORWARDS,
  START,
  JSONEventType,
} from '@eventstore/db-client';

const client = new EventStoreDBClient({
  endpoint: 'localhost:2113',
});

interface Reservation {
  reservationId: string;
  movieId: string;
  userId: string;
  seatId: string;
}

type SeatReservedEvent = JSONEventType<
  'seat-reserved',
  {
    reservationId: string;
    movieId: string;
    userId: string;
    seatId: string;
  }
>;

type SeatChangedEvent = JSONEventType<
  'seat-changed',
  {
    reservationId: string;
    newSeatId: string;
  }
>;

type ReservationEvents = SeatReservedEvent | SeatChangedEvent;

async function simpleTest(): Promise<void> {
  const streamName = 'booking-abc123';

  const event = jsonEvent<SeatReservedEvent>({
    type: 'seat-reserved',
    data: {
      reservationId: 'abc123',
      movieId: 'tt0368226',
      userId: 'nm0802995',
      seatId: '4b',
    },
  });

  const appendResult = await client.appendToStream<ReservationEvents>(
    streamName,
    event
  );

  // By reading the events in the stream, we can construct the current state of the booking

  interface Reservation {
    reservationId: string;
    movieId: string;
    userId: string;
    seatId: string;
  }

  const events = client.readStream<ReservationEvents>(streamName, {
    fromRevision: START,
    direction: FORWARDS,
    maxCount: 10,
  });

  const reservation: Partial<Reservation> = {};

  for await (const { event } of events) {
    switch (event.type) {
      case 'seat-reserved': {
        reservation.reservationId = event.data.reservationId;
        reservation.movieId = event.data.movieId;
        reservation.seatId = event.data.seatId;
        reservation.userId = event.data.userId;
        break;
      }
      case 'seat-changed': {
        reservation.seatId = event.data.newSeatId;
        break;
      }
      default: {
        const _exhaustiveCheck: never = event;
        break;
      }
    }
  }
}

// Do something with our reservation
console.log(reservation);

Support

Information on support can be found on our website: Event Store Support

Communities

Contributing

Refer to our Contribution Guidelines