PHP code example of zachiler / laravel-cadence

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

zachiler / laravel-cadence example snippets

// app/Cadence/Handlers/OrderHandler.php
class OrderHandler extends \Cadence\Support\BaseHandler
{
    protected function handle(\Cadence\State\TickContext $context): void
    {
        $context->businessHours()->every('1 hour', 'create-orders', function () {
            Order::factory()->count($this->config('order_rate', 3))->create();
        });
    }
}

'scenarios' => [
    'growth' => App\Cadence\Scenarios\GrowthScenario::class,
],

// config/cadence.php
return [
    // Environments where Cadence is allowed to run.
    'allowed_environments' => ['local', 'staging'],

    // Default simulation settings. Can be overridden per-run via CLI options.
    'defaults' => [
        // Simulated seconds per real second. 900 = 15 simulated minutes per real second.
        'speed' => 900,

        // Real-time interval between ticks in milliseconds.
        'tick_interval' => 1000,
    ],

    // Named presets for common simulation profiles.
    // Usage: php artisan cadence:run --preset=fast
    'presets' => [
        'fast' => ['speed' => 7200, 'tick_interval' => 500],
        'slow' => ['speed' => 300, 'tick_interval' => 2000],
        'realtime' => ['speed' => 1, 'tick_interval' => 1000],
    ],

    // Queue connection during simulation. Must be 'database'.
    'queue_connection' => 'database',

    // Where database snapshots are stored.
    'snapshot_path' => storage_path('cadence/snapshots'),

    // Custom binary paths for snapshot commands (null = auto-detect).
    'binary_paths' => [
        'mysqldump' => null,
        'mysql' => null,
        'pg_dump' => null,
        'psql' => null,
    ],

    // Prefix for all cache keys used for cross-process state.
    'cache_prefix' => 'cadence',

    // Cache store for simulation state and signals. null = app default.
    'state_store' => null,

    // Named scenarios (implement Cadence\Contracts\Scenario).
    // Supports class strings or [class, default_params] arrays.
    'scenarios' => [
        // 'growth' => App\Cadence\Scenarios\GrowthScenario::class,
        // 'growth-aggressive' => ['class' => App\Cadence\Scenarios\GrowthScenario::class, 'params' => ['signup_rate' => 0.9]],
    ],

    // Tick handler classes (used when no --scenario is specified).
    'handlers' => [],

    // Default options passed to handler config.
    'handler_options' => [],

    // Maximum real-time seconds a single tick is allowed to take. 0 = no limit.
    'max_tick_duration' => 30,

    // Event log storage driver: 'database' or 'file'.
    'event_log_driver' => 'database',

    // Path for JSONL event log when using the 'file' driver.
    'event_log_path' => storage_path('cadence/events.jsonl'),
];

$context->businessHours()->every('1 hour', 'process-orders', function () { /* ... */ });
$context->weekends()->every('4 hours', 'weekend-report', function () { /* ... */ });
$context->on('monday')->between('09:00', '12:00')->every('30 minutes', 'standup', function () { /* ... */ });

class BillingHandler extends BaseHandler implements HasHandlerDependencies
{
    public function dependsOn(): array
    {
        return [TeamLifecycleHandler::class, ProjectActivityHandler::class];
    }
}

$runner->invariant(fn () => User::count() > 0, 'has-users', InvariantBehavior::Pause);
$runner->breakWhen(fn () => Order::where('status', 'failed')->count() > 10, 'too-many-failures');

$this->metric('teams.active', Team::count());     // gauge
$this->increment('invoices.created', $count);      // counter
$series = MetricQuery::series('teams.active');      // query after run

$runner->speedSchedule([
    ['until' => '7 days', 'speed' => 3600],
    ['until' => 'end',    'speed' => 60],
]);

class LogTickDuration implements TickMiddleware
{
    public function handle(TickContext $context, \Closure $next): void
    {
        $start = microtime(true);
        $next($context);
        logger("Tick {$context->tick} took " . round(microtime(true) - $start, 3) . 's');
    }
}

bash
composer cadence:install
php artisan migrate

bash
php artisan cadence:run --scenario=growth --duration="14 days"