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Handle pulling a single pending tenant concurrently

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This commit is contained in:
lukinovec 2026-06-11 11:07:18 +02:00
parent 0913614d5f
commit 0995a073c2
1 changed files with 36 additions and 17 deletions
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53
src/Database/Concerns/HasPending.php
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@ -100,27 +100,46 @@ trait HasPending
*/
public static function pullPendingFromPool(bool $firstOrCreate = false, array $attributes = []): ?Tenant
{
$tenant = DB::transaction(function () use ($attributes): ?Tenant {
/** @var (Model&Tenant)|null $tenant */
$tenant = static::onlyPending()->first();
// Attempt pulling a pending tenant.
// The loop handles the case where a single tenant is being pulled by multiple processes at the same time.
// If a tenant was pulled by a concurrent process, try pulling the next one in the pool.
while (true) {
/** @var (Model&Tenant)|null $pullCandidate */
$pullCandidate = static::onlyPending()->first();
if ($tenant !== null) {
event(new PullingPendingTenant($tenant));
$tenant->update(array_merge($attributes, [
'pending_since' => null,
]));
if ($pullCandidate === null) {
return $firstOrCreate ? static::create($attributes) : null;
}
event(new PullingPendingTenant($pullCandidate));
$tenant = DB::transaction(function () use ($pullCandidate, $attributes): ?Tenant {
$tenantWasPulled = static::onlyPending()
->whereKey($pullCandidate->getKey())
->update([$pullCandidate->getColumnForQuery('pending_since') => null]) > 0;
if (! $tenantWasPulled) {
return null;
}
/** @var Model&Tenant $pulledTenant */
$pulledTenant = static::findOrFail($pullCandidate->getKey());
if (! empty($attributes)) {
$pulledTenant->update($attributes);
}
return $pulledTenant;
});
if ($tenant === null) {
// If another pull claimed this tenant first, try claiming the next one
continue;
}
event(new PendingTenantPulled($tenant));
return $tenant;
});
if ($tenant === null) {
return $firstOrCreate ? static::create($attributes) : null;
}
// Only triggered if a tenant that was pulled from the pool is returned
event(new PendingTenantPulled($tenant));
return $tenant;
}
}