Introduction to Cache Manager Logger

The cache-manager-logger is an effective tool that enhances your caching strategy by integrating logging features seamlessly. It helps developers troubleshoot and optimize caching by providing ample logging details for each caching operation.

Getting Started with Cache Manager Logger

Here’s how you can integrate cache-manager-logger into your application:

  const cacheManager = require('cache-manager');
  const logger = require('cache-manager-logger');

  const memoryCache = cacheManager.caching({ store: 'memory', max: 100, ttl: 10 });

  const config = {
    ttl: 60,
    log: console.log,
    onHit: (key) => logger.info(`Cache hit for key: ${key}`),
    onMiss: (key) => logger.warn(`Cache miss for key: ${key}`),
  };

  const cache = logger(memoryCache, config);

Basic API Usage

Setting a Value

  cache.set('foo', 'bar', { ttl: 100 }, (err) => {
    if (err) {
      console.error('Error setting cache:', err);
    } else {
      console.log('Cache successfully set');
    }
  });

Getting a Value

  cache.get('foo', (err, result) => {
    if (err) {
      console.error('Error getting cache:', err);
    } else {
      console.log('Cache result:', result);
    }
  });

Deleting a Value

  cache.del('foo', (err) => {
    if (err) {
      console.error('Error deleting cache:', err);
    } else {
      console.log('Cache successfully deleted');
    }
  });

Resetting the Cache

  cache.reset((err) => {
    if (err) {
      console.error('Error resetting cache:', err);
    } else {
      console.log('Cache successfully reset');
    }
  });

Checking Cache Keys

  cache.keys((err, keys) => {
    if (err) {
      console.error('Error getting cache keys:', err);
    } else {
      console.log('Cache keys:', keys);
    }
  });

App Example using Cache Manager Logger

  const express = require('express');
  const app = express();
  const port = 3000;

  const cache = logger(memoryCache, config);

  app.get('/data', (req, res) => {
    cache.get('dataKey', (err, result) => {
      if (err) {
        return res.status(500).send('Internal Server Error');
      }
      if (result) {
        return res.status(200).send(result);
      }

      // Simulate data fetching
      const data = { value: 'This is some data' };
      cache.set('dataKey', data, { ttl: 100 }, (err) => {
        if (err) {
          return res.status(500).send('Internal Server Error');
        }
        res.status(200).send(data);
      });
    });
  });

  app.listen(port, () => {
    console.log(`Server running at http://localhost:${port}/`);
  });

By using this combination of caching and logging, you can both improve the efficiency and transparency of your applications.

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