[Scheduler] Add the possibility to override the default CallbackTrigg…

…er description

src/Symfony/Component/Scheduler/Tests/Trigger/CallbackTriggerTest.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Scheduler\Tests\Trigger;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Scheduler\Trigger\CallbackTrigger;
+
+class CallbackTriggerTest extends TestCase
+{
+    public function testToString()
+    {
+        $trigger = new CallbackTrigger(fn () => null);
+        $this->assertMatchesRegularExpression('/^\d{32}$/', (string) $trigger);
+
+        $trigger = new CallbackTrigger(fn () => null, '');
+        $this->assertSame('', (string) $trigger);
+
+        $trigger = new CallbackTrigger(fn () => null, 'foo');
+        $this->assertSame('foo', (string) $trigger);
+    }
+}

src/Symfony/Component/Scheduler/Trigger/CallbackTrigger.php

@@ -19,15 +19,17 @@
 final class CallbackTrigger implements TriggerInterface
 {
     private \Closure $callback;
+    private string $description;
 
-    public function __construct(callable $callback)
+    public function __construct(callable $callback, string $description = null)
     {
         $this->callback = $callback(...);
+        $this->description = $description ?? spl_object_hash($this->callback);
     }
 
     public function __toString(): string
     {
-        return spl_object_hash($this->callback);
+        return $this->description;
     }
 
     public function getNextRunDate(\DateTimeImmutable $run): ?\DateTimeImmutable