Forget job timer in case of exception or failed job (#1127)

* Forget job timer in case of exception or failed job

* Remove trailing whitespace

src/EventMap.php

@@ -33,7 +33,12 @@ trait EventMap
             Listeners\MarkJobsAsMigrated::class,
         ],
 
+        \Illuminate\Queue\Events\JobExceptionOccurred::class => [
+            Listeners\ForgetJobTimer::class,
+        ],
+
         \Illuminate\Queue\Events\JobFailed::class => [
+            Listeners\ForgetJobTimer::class,
             Listeners\MarshalFailedEvent::class,
         ],
 

src/Listeners/ForgetJobTimer.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Laravel\Horizon\Listeners;
+
+use Laravel\Horizon\Stopwatch;
+
+class ForgetJobTimer
+{
+    /**
+     * The stopwatch instance.
+     *
+     * @var \Laravel\Horizon\Stopwatch
+     */
+    public $watch;
+
+    /**
+     * Create a new listener instance.
+     *
+     * @param  \Laravel\Horizon\Stopwatch  $watch
+     * @return void
+     */
+    public function __construct(Stopwatch $watch)
+    {
+        $this->watch = $watch;
+    }
+
+    /**
+     * Handle the event.
+     *
+     * @param  \Illuminate\Queue\Events\JobExceptionOccurred|\Illuminate\Queue\Events\JobFailed  $event
+     * @return void
+     */
+    public function handle($event)
+    {
+        $this->watch->forget($event->job->getJobId());
+    }
+}