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HomeWeb Front-endJS TutorialOptimizing Firestore Caching in Firebase Cloud Functions

Optimizing Firestore Caching in Firebase Cloud Functions

Understanding @libs-jd/cloud-firestore-cache
When working with Firebase Cloud Functions, managing Firestore data efficiently can be tricky.

The @libs-jd/cloud-firestore-cache library offers a simple solution for caching Firestore data within a single cloud function instance.

What Does This Library Do?

This library provides a caching mechanism specifically designed for cloud functions configured with maxInstances set to 1. In this scenario, all requests are handled by a single server instance, allowing for an in-memory caching strategy.

Key Characteristics

  • Scoped Caching: Works within a single cloud function instance
  • Simplified Firestore Operations: Wrapper around standard Firestore methods
  • Minimal Performance Overhead: Lightweight caching mechanism

? Github: https://github.com/jeet-dhandha/cloud-firestore-cache
? NPM: https://www.npmjs.com/package/@libs-jd/cloud-firestore-cache

Installation

npm install @libs-jd/cloud-firestore-cache

Basic Usage Example

const { initializeApp } = require("firebase-admin/app");
const { getFirestore, FieldValue } = require("firebase-admin/firestore");
const { FirestoreCache } = require("@libs-jd/cloud-firestore-cache");

initializeApp();
const firestoreInstance = getFirestore();
const db = FirestoreCache(firestoreInstance, FieldValue);

// Cached Firestore operations
db.get("users/user123").then((result) => {
 console.log("Cached or fetched result:", result);
});

Important Considerations

  • Single Instance Limitation: Most effective when maxInstances is set to 1
  • In-Memory Caching: Cache is maintained within the function’s lifecycle
  • Early Stage Library: Currently in alpha, expect potential changes

Use Case Scenario

This library is particularly useful in scenarios where:

  • You have a cloud function with a single instance
  • You want to reduce redundant Firestore reads
  • You’re looking for a simple caching mechanism with minimal configuration

Potential Benefits

  • Reduced Firestore read operations
  • Slight performance improvement for repeated data access
  • Simplified caching logic

Limitations

  • Not suitable for multi-instance deployments
  • Cache is ephemeral and resets with function cold starts
  • Limited to basic caching strategies

Note: This library addresses a specific caching need in Firebase Cloud Functions. Evaluate its suitability for your specific use case.

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