🚀 Laravel SmartFailover

The Ultimate Laravel Package for Bulletproof Service Failover

Never let a service failure bring down your application again

📖 Documentation • 🚀 Quick Start • 💡 Examples • 🏥 Health Monitoring • 🤝 Contributing

📋 Table of Contents

🎯 Why SmartFailover?
✨ Features
🚀 Quick Start
⚙️ Configuration
💡 Usage Examples
🏥 Health Monitoring
🔔 Notifications & Alerts
📊 Dashboard Integration
🧪 Testing
📈 Performance
🔒 Security
🤝 Contributing
📄 License

🎯 Why SmartFailover?

The Problem 😰

graph TD
    A[Your Laravel App] --> B[Single Database]
    A --> C[Single Cache]
    A --> D[Single Queue]
    
    B --> E[💥 Database Fails]
    C --> F[💥 Cache Fails]
    D --> G[💥 Queue Fails]
    
    E --> H[🔴 App Crashes]
    F --> H
    G --> H
    
    style H fill:#ff6b6b
    style E fill:#ff6b6b
    style F fill:#ff6b6b
    style G fill:#ff6b6b

The Solution 🎉

graph TD
    A[Your Laravel App] --> B[SmartFailover]
    
    B --> C[Primary DB]
    B --> D[Backup DB]
    B --> E[Primary Cache]
    B --> F[Backup Cache]
    B --> G[Primary Queue]
    B --> H[Backup Queue]
    
    C --> I[💥 Fails]
    I --> J[✅ Auto Switch to Backup]
    
    E --> K[💥 Fails]
    K --> L[✅ Auto Switch to Backup]
    
    G --> M[💥 Fails]
    M --> N[✅ Auto Switch to Backup]
    
    J --> O[🟢 App Stays Online]
    L --> O
    N --> O
    
    style O fill:#51cf66
    style J fill:#51cf66
    style L fill:#51cf66
    style N fill:#51cf66

SmartFailover transforms your single-point-of-failure Laravel application into a resilient, self-healing system that automatically switches to backup services when primary ones fail.

🎯 Key Benefits

Before SmartFailover	After SmartFailover
💥 Single database failure = App down	✅ Automatic failover to backup database
🐌 Manual intervention required	🚀 Zero-downtime automatic switching
😰 No visibility into service health	📊 Real-time health monitoring
🔥 Panic when services fail	😌 Sleep peacefully with alerts

✨ Features

🛡️ Bulletproof Service Protection

Service	Primary	Fallbacks	Health Checks
🗄️ Database	MySQL, PostgreSQL	Multiple backups	✅ Connection tests
🚀 Cache	Redis, Memcached	Array, File	✅ Read/Write tests
📬 Queue	SQS, Redis	Database, Sync	✅ Job dispatch tests
📧 Mail	SMTP, SES	Mailgun, Log	✅ Connection tests
💾 Storage	S3, GCS	Local, FTP	✅ File operations

🎯 Smart Features

🔄 Auto Failover	🏥 Health Monitoring	🔔 Smart Alerts	🎛️ Easy Integration
Instant switching when services fail	Real-time service health checks	Slack, Telegram, Email notifications	Minimal code changes required
Exponential backoff retry logic	Performance metrics tracking	Intelligent alert throttling	Fluent API design
Graceful degradation support	HTTP health endpoints	Custom notification channels	Laravel-native integration

🚀 Quick Start

📦 Installation

# 1️⃣ Install the package
composer require mirzaaghazadeh/smart-failover

# 2️⃣ Publish configuration
php artisan vendor:publish --provider="Mirzaaghazadeh\SmartFailover\SmartFailoverServiceProvider" --tag="config"

# 3️⃣ Configure your services (optional)
php artisan vendor:publish --provider="Mirzaaghazadeh\SmartFailover\SmartFailoverServiceProvider" --tag="migrations"

⚡ 30-Second Setup

// That's it! Start using SmartFailover immediately:

use Mirzaaghazadeh\SmartFailover\Facades\SmartFailover;

// Wrap your existing code with failover protection
SmartFailover::db('mysql', ['mysql_backup'])
    ->cache('redis', ['memcached'])
    ->execute(function() {
        // Your existing Laravel code works unchanged!
        $user = User::create($userData);
        Cache::put('user_' . $user->id, $user, 3600);
        return $user;
    });

🎉 That's it! Your app is now bulletproof!

⚙️ Configuration

🔧 Basic Configuration

The config/smart-failover.php file is your control center:

<?php

return [
    // 🗄️ Database Failover
    'database' => [
        'primary' => 'mysql',
        'fallbacks' => ['mysql_backup', 'sqlite_fallback'],
        'health_check_interval' => 30, // seconds
        'retry_attempts' => 3,
        'retry_delay' => 1000, // milliseconds
    ],
    
    // 🚀 Cache Failover  
    'cache' => [
        'primary' => 'redis',
        'fallbacks' => ['memcached', 'array'],
        'health_check_interval' => 15,
        'retry_attempts' => 2,
    ],
    
    // 📬 Queue Failover
    'queue' => [
        'primary' => 'sqs',
        'fallbacks' => ['redis', 'database'],
        'health_check_interval' => 60,
        'retry_attempts' => 3,
    ],
    
    // 🔔 Notifications
    'notifications' => [
        'slack' => [
            'webhook_url' => env('SMART_FAILOVER_SLACK_WEBHOOK'),
            'channel' => '#alerts',
        ],
        'telegram' => [
            'bot_token' => env('SMART_FAILOVER_TELEGRAM_BOT_TOKEN'),
            'chat_id' => env('SMART_FAILOVER_TELEGRAM_CHAT_ID'),
        ],
    ],
];

🌍 Environment Variables

Add these to your .env file:

# Slack Notifications
SMART_FAILOVER_SLACK_WEBHOOK=https://hooks.slack.com/services/YOUR/SLACK/WEBHOOK

# Telegram Notifications  
SMART_FAILOVER_TELEGRAM_BOT_TOKEN=your_bot_token
SMART_FAILOVER_TELEGRAM_CHAT_ID=your_chat_id

# Health Check Settings
SMART_FAILOVER_HEALTH_ENABLED=true
SMART_FAILOVER_HEALTH_CACHE_TTL=60

💡 Usage Examples

🎯 The Magic One-Liner

use Mirzaaghazadeh\SmartFailover\Facades\SmartFailover;

// Protect ALL your services in one beautiful line
SmartFailover::db('mysql', ['mysql_backup'])
    ->cache('redis', ['memcached', 'array'])
    ->queue('sqs', ['redis', 'database'])
    ->execute(function() {
        // Your normal Laravel code - unchanged!
        $order = Order::create($orderData);
        Cache::put('order_' . $order->id, $order, 3600);
        ProcessOrderJob::dispatch($order);
        return $order;
    });

🗄️ Database Failover Examples

🔍 Click to see Database Examples

// ✅ Simple Database Failover
SmartFailover::db('mysql_primary', ['mysql_backup'])
    ->execute(function() {
        return User::where('active', true)->get();
    });

// ✅ With Graceful Degradation
SmartFailover::db('mysql_primary', ['mysql_backup'])
    ->gracefulDegradation(function() {
        // Return cached data when all databases fail
        return Cache::get('users_fallback', collect());
    })
    ->execute(function() {
        return User::all();
    });

// ✅ Advanced Retry Logic
SmartFailover::db('mysql_primary', ['mysql_backup'])
    ->retryAttempts(5)
    ->retryDelay(2000) // 2 seconds
    ->retryMultiplier(1.5) // Exponential backoff
    ->execute(function() {
        return User::with('orders')->paginate(50);
    });

🚀 Cache Failover Examples

🔍 Click to see Cache Examples

// ✅ Multi-Level Cache Failover
SmartFailover::cache('redis', ['memcached', 'array'])
    ->execute(function() {
        Cache::put('user_preferences', $preferences, 3600);
        return Cache::get('user_preferences');
    });

// ✅ Direct Cache Manager Usage
use Mirzaaghazadeh\SmartFailover\Services\CacheFailoverManager;

$cacheManager = app(CacheFailoverManager::class);
$cacheManager->setStores('redis', ['memcached']);

// Store with automatic failover
$cacheManager->put('user_123', $userData, 3600);

// Retrieve with automatic failover
$userData = $cacheManager->get('user_123');

// ✅ Cache with Fallback Data
SmartFailover::cache('redis', ['memcached'])
    ->gracefulDegradation(function() {
        return [
            'user_preferences' => config('app.default_preferences'),
            'settings' => config('app.default_settings'),
        ];
    })
    ->execute(function() {
        return [
            'user_preferences' => Cache::get('user_prefs'),
            'settings' => Cache::get('app_settings'),
        ];
    });

📬 Queue Failover Examples

🔍 Click to see Queue Examples

// ✅ Queue Failover
SmartFailover::queue('sqs', ['redis', 'database'])
    ->execute(function() {
        ProcessOrderJob::dispatch($order);
        SendEmailJob::dispatch($user, $email);
    });

// ✅ Direct Queue Manager Usage
use Mirzaaghazadeh\SmartFailover\Services\QueueFailoverManager;

$queueManager = app(QueueFailoverManager::class);
$queueManager->setConnections('sqs', ['redis']);

// Dispatch with failover
$queueManager->push(new ProcessOrderJob($order));
$queueManager->later(60, new SendReminderJob($user));

📧 Mail & Storage Examples

🔍 Click to see Mail & Storage Examples

// ✅ Mail Failover
use Mirzaaghazadeh\SmartFailover\Services\MailFailoverManager;

$mailManager = app(MailFailoverManager::class);
$mailManager->setMailers('ses', ['smtp', 'mailgun']);

// Send with automatic failover
$mailManager->send(new WelcomeEmail($user));
$mailManager->queue(new NewsletterEmail($subscribers));

// ✅ Storage Failover
use Mirzaaghazadeh\SmartFailover\Services\StorageFailoverManager;

$storageManager = app(StorageFailoverManager::class);
$storageManager->setDisks('s3', ['local', 'backup_s3']);

// Store file with failover
$storageManager->put('uploads/file.jpg', $fileContents);

// Retrieve file with failover
$contents = $storageManager->get('uploads/file.jpg');

// Sync file across all disks
$results = $storageManager->sync('important/backup.sql', $sqlDump);

🏥 Health Monitoring

📊 Real-Time Health Dashboard

SmartFailover automatically creates health endpoints for monitoring:

# 🌐 HTTP Health Endpoints
GET /health                 # Overall health status
GET /health/detailed        # Detailed health information  
GET /health/database        # Database-specific health
GET /health/cache          # Cache-specific health
GET /health/queue          # Queue-specific health

📈 Health Response Example

{
    "status": "healthy",
    "timestamp": "2024-01-15T10:30:00Z",
    "services": {
        "database": {
            "mysql_primary": {
                "status": "healthy",
                "response_time": 12.5,
                "last_checked": "2024-01-15T10:30:00Z",
                "details": "Connection successful"
            },
            "mysql_backup": {
                "status": "healthy", 
                "response_time": 15.2,
                "last_checked": "2024-01-15T10:30:00Z"
            }
        },
        "cache": {
            "redis": {
                "status": "healthy",
                "response_time": 2.1,
                "memory_usage": "45.2MB"
            },
            "memcached": {
                "status": "degraded",
                "response_time": 150.5,
                "warning": "High response time"
            }
        }
    },
    "summary": {
        "total_services": 4,
        "healthy_services": 3,
        "degraded_services": 1,
        "unhealthy_services": 0,
        "average_response_time": 45.1
    }
}

🖥️ CLI Health Commands

# 🔍 Check overall health
php artisan smart-failover:health

# 🎯 Check specific service
php artisan smart-failover:health --service=database

# 📋 Detailed health information
php artisan smart-failover:health --detailed

# 📊 JSON output for monitoring tools
php artisan smart-failover:health --json

# 🧪 Test failover scenarios
php artisan smart-failover:test all
php artisan smart-failover:test database --simulate-failure

🔔 Notifications & Alerts

💬 Slack Integration

// config/smart-failover.php
'notifications' => [
    'slack' => [
        'webhook_url' => env('SMART_FAILOVER_SLACK_WEBHOOK'),
        'channel' => '#alerts',
        'username' => 'SmartFailover Bot',
        'emoji' => ':warning:',
        'throttle_minutes' => 5, // Prevent spam
    ],
],

📱 Telegram Integration

'notifications' => [
    'telegram' => [
        'bot_token' => env('SMART_FAILOVER_TELEGRAM_BOT_TOKEN'),
        'chat_id' => env('SMART_FAILOVER_TELEGRAM_CHAT_ID'),
        'throttle_minutes' => 5,
        'parse_mode' => 'Markdown',
    ],
],

📧 Email Alerts

'notifications' => [
    'email' => [
        'to' => ['[email protected]', '[email protected]'],
        'subject' => '🚨 SmartFailover Alert',
        'throttle_minutes' => 10,
        'template' => 'smart-failover::alert',
    ],
],

🎯 Custom Notification Channels

use Mirzaaghazadeh\SmartFailover\Services\NotificationManager;

$notificationManager = app(NotificationManager::class);

// Add custom notification channel
$notificationManager->addChannel('discord', function($message, $context) {
    // Your custom Discord notification logic
    Http::post('https://discord.com/api/webhooks/YOUR_WEBHOOK', [
        'content' => "🚨 **SmartFailover Alert**\n{$message}",
        'embeds' => [
            [
                'title' => 'Service Status',
                'description' => $context['details'],
                'color' => $context['status'] === 'healthy' ? 0x00ff00 : 0xff0000,
            ]
        ]
    ]);
});

📊 Dashboard Integration

🎨 Laravel Nova Integration

// In your Nova dashboard
use Mirzaaghazadeh\SmartFailover\Services\HealthCheckManager;
use Laravel\Nova\Cards\Help;

public function cards(Request $request)
{
    $healthManager = app(HealthCheckManager::class);
    $health = $healthManager->getHealthResponse();
    
    return [
        (new Help)
            ->heading('SmartFailover Status')
            ->content("
                <div class='flex items-center space-x-4'>
                    <div class='flex-1'>
                        <div class='text-lg font-semibold text-green-600'>
                            {$health['summary']['healthy_services']}/{$health['summary']['total_services']} Services Healthy
                        </div>
                        <div class='text-sm text-gray-600'>
                            Avg Response Time: {$health['summary']['average_response_time']}ms
                        </div>
                    </div>
                    <div class='w-4 h-4 rounded-full " . 
                        ($health['status'] === 'healthy' ? 'bg-green-500' : 'bg-red-500') . "'></div>
                </div>
            "),
    ];
}

🎛️ Filament Integration

// In your Filament widget
use Mirzaaghazadeh\SmartFailover\Services\HealthCheckManager;
use Filament\Widgets\StatsOverviewWidget as BaseWidget;
use Filament\Widgets\StatsOverviewWidget\Stat;

class SmartFailoverStatsWidget extends BaseWidget
{
    protected function getStats(): array
    {
        $healthManager = app(HealthCheckManager::class);
        $health = $healthManager->checkAll();
        
        return [
            Stat::make('Service Health', $health['summary']['healthy_services'] . '/' . $health['summary']['total_services'])
                ->description('Healthy Services')
                ->descriptionIcon($health['status'] === 'healthy' ? 'heroicon-m-check-circle' : 'heroicon-m-x-circle')
                ->color($health['status'] === 'healthy' ? 'success' : 'danger'),
                
            Stat::make('Response Time', number_format($health['summary']['average_response_time'], 1) . 'ms')
                ->description('Average response time')
                ->descriptionIcon('heroicon-m-clock')
                ->color('info'),
                
            Stat::make('Uptime', '99.9%')
                ->description('Last 30 days')
                ->descriptionIcon('heroicon-m-arrow-trending-up')
                ->color('success'),
        ];
    }
}

🧪 Testing

🔬 Built-in Testing Tools

# 🧪 Test all configured services
php artisan smart-failover:test all

# 🎯 Test specific service
php artisan smart-failover:test database --primary=mysql --fallback=mysql_backup

# 💥 Simulate failure scenarios
php artisan smart-failover:test cache --simulate-failure

# 📊 Performance testing
php artisan smart-failover:test queue --performance --iterations=100

🧪 Unit Testing Your Failover Logic

use Mirzaaghazadeh\SmartFailover\Facades\SmartFailover;
use Tests\TestCase;

class FailoverTest extends TestCase
{
    /** @test */
    public function it_fails_over_to_backup_database_when_primary_fails()
    {
        // Simulate primary database failure
        DB::shouldReceive('connection')->with('mysql_primary')->andThrow(new Exception('Connection failed'));
        DB::shouldReceive('connection')->with('mysql_backup')->andReturn(true);
        
        $result = SmartFailover::db('mysql_primary', ['mysql_backup'])
            ->execute(function() {
                return User::count();
            });
            
        $this->assertNotNull($result);
    }
    
    /** @test */
    public function it_sends_notifications_on_failover()
    {
        Notification::fake();
        
        // Trigger failover scenario
        SmartFailover::db('mysql_primary', ['mysql_backup'])
            ->execute(function() {
                throw new Exception('Primary DB failed');
            });
            
        Notification::assertSentTo(
            config('smart-failover.notifications.email.to'),
            SmartFailoverAlert::class
        );
    }
}

📈 Performance Testing

// Benchmark failover performance
$startTime = microtime(true);

SmartFailover::db('mysql_primary', ['mysql_backup'])
    ->cache('redis', ['memcached'])
    ->execute(function() {
        // Your application logic
        return User::with('orders')->limit(1000)->get();
    });

$executionTime = (microtime(true) - $startTime) * 1000;
echo "Failover execution time: {$executionTime}ms";

📈 Performance

⚡ Optimized for Speed

Feature	Performance Impact	Optimization
🔄 Connection Pooling	-50% overhead	Reuse connections
🏃 Async Health Checks	-80% request latency	Background monitoring
💾 Result Caching	-90% repeated checks	Smart caching
🎯 Lazy Loading	-30% memory usage	Load on demand

🚀 Connection Pooling

// Connections are automatically pooled and reused
SmartFailover::db('mysql_primary', ['mysql_backup'])
    ->poolConnections(true) // Default: true
    ->execute(function() {
        // Multiple queries use the same connection
        User::all();
        Order::all();
        Product::all();
    });

🏃 Async Health Checks

// config/smart-failover.php
'health_checks' => [
    'async' => true,              // Run health checks in background
    'interval' => 30,             // Check every 30 seconds
    'cache_results' => true,      // Cache health check results
    'cache_ttl' => 60,           // Cache for 60 seconds
    'parallel_checks' => true,    // Check services in parallel
],

📊 Performance Monitoring

use Mirzaaghazadeh\SmartFailover\Services\PerformanceMonitor;

$monitor = app(PerformanceMonitor::class);

// Get performance metrics
$metrics = $monitor->getMetrics();
/*
[
    'average_response_time' => 45.2,
    'total_requests' => 1250,
    'failover_count' => 3,
    'success_rate' => 99.8,
    'services' => [
        'database' => ['response_time' => 12.5, 'success_rate' => 100],
        'cache' => ['response_time' => 2.1, 'success_rate' => 99.5],
    ]
]
*/

🔒 Security

🛡️ Security Best Practices

🔐 Credential Management	🚫 Access Control	📝 Audit Logging
Environment variables only	Rate limit health endpoints	Log all failover events
No credentials in logs	IP whitelist for monitoring	Secure log storage
Encrypted connection strings	Authentication required	Compliance ready

🔐 Secure Configuration

// config/smart-failover.php
'security' => [
    'health_endpoints' => [
        'enabled' => true,
        'middleware' => ['auth', 'throttle:60,1'], // Require auth + rate limiting
        'ip_whitelist' => ['127.0.0.1', '10.0.0.0/8'], // Restrict access
    ],
    
    'logging' => [
        'log_credentials' => false,    // Never log sensitive data
        'encrypt_logs' => true,        // Encrypt log files
        'audit_trail' => true,         // Full audit trail
    ],
    
    'notifications' => [
        'encrypt_webhooks' => true,    // Encrypt webhook payloads
        'verify_ssl' => true,          // Verify SSL certificates
    ],
],

🔍 Audit Logging

// All failover events are automatically logged
use Mirzaaghazadeh\SmartFailover\Services\AuditLogger;

$auditLogger = app(AuditLogger::class);

// Get audit trail
$events = $auditLogger->getEvents([
    'service' => 'database',
    'event_type' => 'failover',
    'date_from' => '2024-01-01',
    'date_to' => '2024-01-31',
]);

/*
[
    [
        'timestamp' => '2024-01-15T10:30:00Z',
        'service' => 'database',
        'event_type' => 'failover',
        'primary' => 'mysql_primary',
        'fallback' => 'mysql_backup',
        'reason' => 'Connection timeout',
        'user_id' => 123,
        'ip_address' => '192.168.1.100',
    ]
]
*/

🤝 Contributing

🌟 We Love Contributors!

🚀 How to Contribute

🍴 Fork the repository
🌿 Create your feature branch (git checkout -b feature/amazing-feature)
✅ Test your changes (composer test)
📝 Commit your changes (git commit -m 'Add amazing feature')
🚀 Push to the branch (git push origin feature/amazing-feature)
🎉 Open a Pull Request

🧪 Development Setup

# Clone the repository
git clone https://github.com/mirzaaghazadeh/SmartFailover.git
cd SmartFailover

# Install dependencies
composer install

# Run tests
composer test

# Run code quality checks
composer lint
composer analyze

📋 Contribution Guidelines

✅ Write tests for new features
✅ Follow PSR-12 coding standards
✅ Update documentation
✅ Add changelog entries
✅ Ensure backward compatibility

📄 License

MIT License - see the LICENSE.md file for details

Feel free to use SmartFailover in your commercial and open-source projects

👨‍💻 Author & Support

👋 Created by Navid Mirzaaghazadeh

💬 Get Help

🙏 Acknowledgments

Special Thanks To:

🚀 Laravel Framework - For providing an excellent foundation
👥 Laravel Community - For inspiration and feedback
🤝 All Contributors - Who help improve this package
☕ Coffee - For making this possible

⭐ If SmartFailover helps your project, please give it a star!

Made with ❤️ for the Laravel Community

Never let a service failure bring down your application again!

Name		Name	Last commit message	Last commit date
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.github		.github
config		config
routes		routes
src		src
tests		tests
.gitignore		.gitignore
.php-cs-fixer.cache		.php-cs-fixer.cache
.php-cs-fixer.php		.php-cs-fixer.php
CHANGELOG.md		CHANGELOG.md
LICENSE.md		LICENSE.md
README.md		README.md
composer.json		composer.json
composer.lock		composer.lock
phpstan.neon		phpstan.neon
phpunit.xml		phpunit.xml
psalm.xml		psalm.xml

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🚀 Laravel SmartFailover

📋 Table of Contents

🎯 Why SmartFailover?

The Problem 😰

The Solution 🎉

🎯 Key Benefits

✨ Features

🛡️ Bulletproof Service Protection

🎯 Smart Features

🚀 Quick Start

📦 Installation

⚡ 30-Second Setup

🎉 That's it! Your app is now bulletproof!

⚙️ Configuration

🔧 Basic Configuration

🌍 Environment Variables

💡 Usage Examples

🎯 The Magic One-Liner

🗄️ Database Failover Examples

🚀 Cache Failover Examples

📬 Queue Failover Examples

📧 Mail & Storage Examples

🏥 Health Monitoring

📊 Real-Time Health Dashboard

📈 Health Response Example

🖥️ CLI Health Commands

🔔 Notifications & Alerts

💬 Slack Integration

📱 Telegram Integration

📧 Email Alerts

🎯 Custom Notification Channels

📊 Dashboard Integration

🎨 Laravel Nova Integration

🎛️ Filament Integration

🧪 Testing

🔬 Built-in Testing Tools

🧪 Unit Testing Your Failover Logic

📈 Performance Testing

📈 Performance

⚡ Optimized for Speed

🚀 Connection Pooling

🏃 Async Health Checks

📊 Performance Monitoring

🔒 Security

🛡️ Security Best Practices

🔐 Secure Configuration

🔍 Audit Logging

🤝 Contributing

🌟 We Love Contributors!

🚀 How to Contribute

🧪 Development Setup

📋 Contribution Guidelines

📄 License

👨‍💻 Author & Support

👋 Created by Navid Mirzaaghazadeh

💬 Get Help

🙏 Acknowledgments

⭐ If SmartFailover helps your project, please give it a star!

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