PlatoJobs Cache Manager

A powerful, standalone cache manager plugin for Flutter, supporting Android and iOS platforms with enhanced features. This plugin is completely independent and does not rely on flutter_cache_manager, providing a lightweight and efficient caching solution.

Features

• ✅ File Caching: Download and cache files from URLs
• ✅ Automatic Cache Management: Automatic cleanup of expired files
• ✅ Cache Statistics: Track cache hits, misses, downloads, and evictions
• ✅ Configurable Cache Strategy: Support for LRU, LFU, FIFO, and size-based eviction
• ✅ Concurrent Downloads: Control maximum concurrent downloads
• ✅ Custom Headers: Support for custom HTTP headers
• ✅ Cache Size Limits: Set maximum cache size
• ✅ File Preloading: Preload files in background
• ✅ Progressive Download: Stream file downloads with progress
• ✅ Unified File Naming: All cached files are prefixed with plato_jobs_

Installation

Add this to your package's pubspec.yaml file:

dependencies:
  plato_jobs_cache_manager:
    path: ../plato_jobs_cache_manager

Or if published to pub.dev:

dependencies:
  plato_jobs_cache_manager: ^0.0.1

Usage

Basic Usage

import 'package:plato_jobs_cache_manager/plato_jobs_cache_manager.dart';

// Create a cache manager instance
final cacheManager = PlatoJobsCacheManager();

// Download and cache a file
final file = await cacheManager.getFile('https://example.com/image.jpg');

// Use the cached file
print('File path: ${file.path}');

Advanced Configuration

import 'package:plato_jobs_cache_manager/plato_jobs_cache_manager.dart';

// Create a cache manager with custom configuration
final cacheManager = PlatoJobsCacheManager(
  key: 'my_cache',
  config: PlatoJobsCacheConfig(
    maxAge: Duration(days: 30),
    maxNrOfCacheObjects: 500,
    maxCacheSize: 100 * 1024 * 1024, // 100 MB
    enableStats: true,
    autoCleanup: true,
    cleanupInterval: Duration(hours: 12),
    maxConcurrentDownloads: 10,
    headers: {
      'Authorization': 'Bearer token',
    },
  ),
  strategy: PlatoJobsCacheStrategy(
    evictionStrategy: PlatoJobsCacheEvictionStrategy.lru,
    validationStrategy: PlatoJobsCacheValidationStrategy.ageBased,
    enablePreload: true,
    enableBackgroundDownload: true,
  ),
);

Get File with Stream (Progressive Download)

final stream = cacheManager.getFileStream(
  'https://example.com/large-file.zip',
  withProgress: true,
);

await for (final response in stream) {
  if (response is DownloadProgress) {
    print('Progress: ${response.progress}');
  } else if (response is FileInfo) {
    print('File downloaded: ${response.file.path}');
  }
}

Cache Statistics

final stats = cacheManager.getStats();
print('Cache hits: ${stats.hits}');
print('Cache misses: ${stats.misses}');
print('Hit rate: ${(stats.hitRate * 100).toStringAsFixed(2)}%');
print('Total downloads: ${stats.downloads}');
print('Total evictions: ${stats.evictions}');

Preload Files

// Preload multiple files in background
await cacheManager.preloadFiles([
  'https://example.com/image1.jpg',
  'https://example.com/image2.jpg',
  'https://example.com/image3.jpg',
]);

Cache Management

// Get cache size
final size = await cacheManager.getCacheSize();
print('Cache size: ${(size / 1024 / 1024).toStringAsFixed(2)} MB');

// Clear all cache
await cacheManager.clearCache();

// Remove specific file
await cacheManager.removeFile('https://example.com/image.jpg');

// Manual cleanup
await cacheManager.cleanup();

Configuration Options

PlatoJobsCacheConfig

• maxAge: Maximum age for cached files (default: 7 days)
• maxNrOfCacheObjects: Maximum number of cache objects (default: 200)
• maxCacheSize: Maximum cache size in bytes (null = unlimited)
• cacheDir: Cache directory name (default: 'plato_jobs_cache')
• enableStats: Enable cache statistics (default: true)
• autoCleanup: Enable automatic cache cleanup (default: true)
• cleanupInterval: Cleanup interval (default: 24 hours)
• maxConcurrentDownloads: Maximum concurrent downloads (default: 5)
• headers: Custom HTTP headers for requests

PlatoJobsCacheStrategy

• evictionStrategy: Cache eviction strategy (LRU, LFU, FIFO, Size)
• validationStrategy: Cache validation strategy (Always, Never, AgeBased)
• enablePreload: Enable file preloading (default: false)
• enableBackgroundDownload: Enable background downloads (default: false)

Platform Support

• ✅ Android (minSdk: 24)
• ✅ iOS (minVersion: 13.0)

Key Features

1. Standalone Implementation: No dependency on flutter_cache_manager - completely independent
2. Lightweight: Minimal dependencies, only uses http, path_provider, and path packages
3. Enhanced Features: Cache statistics, preloading, and advanced eviction strategies
4. Better Performance: Optimized for concurrent downloads and efficient cache management
5. Unified Naming: All cached files are prefixed with plato_jobs_ for easy identification
6. More Configuration Options: More granular control over cache behavior
7. Better Error Handling: Improved error handling and recovery
8. JSON-based Metadata: Simple JSON file-based cache metadata storage

License

See LICENSE file for details.