Laravel's session blocking prevents race conditions and data inconsistencies by controlling concurrent session access. This feature ensures data integrity during simultaneous operations.
Understanding Session Blocking
Session blocking requires:

• Cache driver supporting atomic locks (redis, memcached, dynamodb, database)
• Non-cookie session driver

Route::post('/endpoint', function() {
// Operation logic
})->block($lockSeconds = 5, $waitSeconds = 10);

Real-World Implementation
Let's build a payment processing system with concurrency control:
<?php

namespace App\Http\Controllers;

use App\Models\Payment;
use Illuminate\Support\Facades\DB;
use App\Exceptions\PaymentException;

class PaymentController extends Controller
{
public function process(Request $request)
{
return DB::transaction(function() use ($request) {
// Validate payment exists and isn't processed
$payment = Payment::findOrFail($request->payment_id);

if ($payment->isProcessed()) {
throw new PaymentException('Payment already processed');
}

// Process payment
$result = $this->paymentGateway->charge([
'amount' => $payment->amount,
'currency' => $payment->currency,
'token' => $request->payment_token
]);
$payment->markAsProcessed($result->transaction_id);

return response()->json([
'status' => 'success',
'transaction_id' => $result->transaction_id
]);
});
}
}

// routes/api.php
Route::post('/payments/process', [PaymentController::class, 'process'])->block(5, 10);

This implementation:

• Prevents duplicate payment processing
• Waits up to 10 seconds for lock acquisition
• Uses database transactions for atomicity
• Handles concurrent requests gracefully

Session blocking provides a robust solution for managing concurrent requests, ensuring data integrity in high-traffic applications while maintaining a clean, Laravel-centric implementation.

The post Managing Concurrent Requests with Laravel Session Blocking appeared first on Laravel News.
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