Caching JSON Data
Now, let’s define functions to store and retrieve JSON data in Redis:
// Function to set JSON data in Redis
function setJSONData(key, data) {
client.set(key, JSON.stringify(data), (error, reply) => {
if (error) {
console.error('Error setting JSON data in Redis:', error);
} else {
console.log('JSON data cached successfully:', reply);
}
});
}
// Function to get JSON data from Redis
function getJSONData(key, callback) {
client.get(key, (error, reply) => {
if (error) {
console.error('Error getting JSON data from Redis:', error);
callback(error, null);
} else {
console.log('JSON data retrieved successfully:', reply);
callback(null, JSON.parse(reply));
}
});
}
Example: Let’s demonstrate how to use these functions to cache and retrieve JSON data:
// Sample JSON data
const jsonData = {
name: 'John Doe',
age: 30,
email: 'john@example.com'
};
// Cache JSON data
setJSONData('user:1', jsonData);
// Retrieve cached JSON data
getJSONData('user:1', (error, data) => {
if (error) {
console.error('Error:', error);
} else {
console.log('Retrieved JSON data:', data);
}
});
Example: Below is an example to cache JSON data in Redis with NodeJS
const redis = require('redis');
const client = redis.createClient();
client.on('connect', async () => {
console.log('Connected to Redis');
// Write your code here
// Example: Set JSON data
const jsonData = {
name: 'John Doe',
age: 30,
email: 'john@example.com'
};
await client.set('jsondata', JSON.stringify(jsonData));
// Example: Get JSON data
const cachedData = await client.get('jsondata');
if (cachedData) {
console.log('Cached JSON data:', JSON.parse(cachedData));
} else {
console.log('Data not found in cache.');
}
client.quit();
});
client.on('error', (err) => {
console.error('Redis error:', err);
});
Output:
How to cache JSON data in Redis with NodeJS?
To cache JSON data in Redis with Node.js, you can use the redis
npm package along with JSON serialization and deserialization. Redis, an open-source, in-memory data store, is commonly used as a caching solution due to its high performance and flexibility. In this tutorial, we’ll explore how to cache JSON data in Redis using Node.js, allowing you to efficiently store and retrieve JSON objects.