Add events for when supervisors are terminated (#1282)

* Add events for when supervisors are terminated

* Fix styleCI issues

* rename files

* Update SupervisorOutOfMemory.php

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Events/MasterSupervisorOutOfMemory.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Laravel\Horizon\Events;
+
+use Laravel\Horizon\MasterSupervisor;
+
+class MasterSupervisorOutOfMemory
+{
+    /**
+     * The master supervisor instance.
+     *
+     * @var \Laravel\Horizon\MasterSupervisor
+     */
+    public $master;
+
+    /**
+     * Create a new event instance.
+     *
+     * @param  \Laravel\Horizon\MasterSupervisor  $master
+     * @return void
+     */
+    public function __construct(MasterSupervisor $master)
+    {
+        $this->master = $master;
+    }
+}

src/Events/SupervisorOutOfMemory.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Laravel\Horizon\Events;
+
+use Laravel\Horizon\Supervisor;
+
+class SupervisorOutOfMemory
+{
+    /**
+     * The supervisor instance.
+     *
+     * @var \Laravel\Horizon\Supervisor
+     */
+    public $supervisor;
+
+    /**
+     * Create a new event instance.
+     *
+     * @param  \Laravel\Horizon\Supervisor  $supervisor
+     * @return void
+     */
+    public function __construct(Supervisor $supervisor)
+    {
+        $this->supervisor = $supervisor;
+    }
+}

src/Listeners/MonitorMasterSupervisorMemory.php

@@ -3,6 +3,7 @@
 namespace Laravel\Horizon\Listeners;
 
 use Laravel\Horizon\Events\MasterSupervisorLooped;
+use Laravel\Horizon\Events\MasterSupervisorOutOfMemory;
 
 class MonitorMasterSupervisorMemory
 {
@@ -18,6 +19,8 @@ public function handle(MasterSupervisorLooped $event)
 
         if ($master->memoryUsage() > config('horizon.memory_limit', 64)) {
             $master->terminate(12);
+
+            event(new MasterSupervisorOutOfMemory($master));
         }
     }
 }

src/Listeners/MonitorSupervisorMemory.php

@@ -3,6 +3,7 @@
 namespace Laravel\Horizon\Listeners;
 
 use Laravel\Horizon\Events\SupervisorLooped;
+use Laravel\Horizon\Events\SupervisorOutOfMemory;
 
 class MonitorSupervisorMemory
 {
@@ -18,6 +19,8 @@ public function handle(SupervisorLooped $event)
 
         if ($supervisor->memoryUsage() > $supervisor->options->memory) {
             $supervisor->terminate(12);
+
+            event(new SupervisorOutOfMemory($supervisor));
         }
     }
 }