Penghitung Terdistribusi

Firebase
Made by Firebase

Merekam penghitung peristiwa dalam skala besar untuk mengakomodasi penulisan berkecepatan tinggi ke Cloud Firestore.

Cara kerja ekstensi ini

Use this extension to add a highly scalable counter service to your app. This is ideal for applications that count viral actions or any very high-velocity action such as views, likes, or shares.

Since Cloud Firestore has a limit of one sustained write per second, per document, this extension instead shards your writes across documents in a _counter_shards_ subcollection. Each client only increments their own unique shard while the background workers (provided by this extension) monitor and aggregate these shards into a main document.

Here are some features of this extension:

  • Scales from 0 updates per second to a maximum of 10,000 per second.
  • Supports an arbitrary number of counters in your app.
  • Works offline and provides latency compensation for the main counter.

Note that this extension requires client-side logic to work. We provide a TypeScript client sample implementation and its compiled minified JavaScript. You can use this extension on other platforms if you'd like to develop your own client code based on the provided client sample.

Additional setup

Before installing this extension, make sure that you've set up a Cloud Firestore database in your Firebase project.

After installing this extension, you'll need to:

  • Update your database security rules.
  • Set up a Cloud Scheduler job to regularly call the controllerCore function, which is created by this extension. It works by either aggregating shards itself or scheduling and monitoring workers to aggregate shards.
  • Use the provided client sample or your own client code to specify your document path and increment values.

Detailed information for these post-installation tasks are provided after you install this extension.

Billing

To install an extension, your project must be on the Blaze (pay as you go) plan

  • You will be charged a small amount (typically around $0.01/month) for the Firebase resources required by this extension (even if it is not used).
  • This extension uses other Firebase and Google Cloud Platform services, which have associated charges if you exceed the service’s free tier:
  • Cloud Firestore
  • Cloud Functions (Node.js 10+ runtime. See FAQs)

Cara menginstal ekstensi ini

Menggunakan Firebase console

Anda dapat menggunakan Firebase console untuk menginstal dan mengelola ekstensi.

Instal menggunakan konsol

Menggunakan Firebase CLI

Anda juga dapat menggunakan Firebase CLI untuk menginstal dan mengelola ekstensi:

Langkah 1: Jalankan perintah npm berikut untuk menginstal CLI atau memperbarui ke versi CLI terbaru.

npm install -g firebase-tools
Tidak berhasil? Lihat referensi Firebase CLI atau ubah izin npm Anda.

Langkah 2: Instal ekstensi ini dengan menjalankan perintah berikut

firebase ext:install firestore-counter --project=projectId_or_alias
Dukungan
Cloud Firestore
Penulis
Lisensi
Apache-2.0
Versi
0.1.5