Allow to configure request watchers priority (#5)

Author: marmichalski

README.md

@@ -56,7 +56,9 @@ chaos_monkey:
         kill_app:
             active: false
     watchers: # currently watchers can be enabled/disabled only in container compile time
-        request: true
+        request:
+            enabled: true
+            priority: 0
 ```
 
 ## Roadmap

src/DependencyInjection/ChaosMonkeyExtension.php

@@ -44,9 +44,12 @@ private function setChaosMonkeySettings(ContainerBuilder $container, array $conf
 
     private function enableWatchers(ContainerBuilder $container, array $config): void
     {
-        if ($config['watchers']['request'] === true) {
+        if ($config['watchers']['request']['enabled'] === true) {
             $requestWatcher = $container->getDefinition('chaos_monkey.watcher.request');
-            $requestWatcher->addTag('kernel.event_listener', ['event' => 'kernel.request']);
+            $requestWatcher->addTag('kernel.event_listener', [
+                'event' => 'kernel.request',
+                'priority' => $config['watchers']['request']['priority'],
+            ]);
         }
     }
 }

src/DependencyInjection/Configuration.php

@@ -57,7 +57,12 @@ public function getConfigTreeBuilder()
             ->arrayNode('watchers')
                 ->addDefaultsIfNotSet()
                 ->children()
-                    ->booleanNode('request')->defaultTrue()->end()
+                    ->arrayNode('request')
+                        ->canBeDisabled()
+                        ->children()
+                            ->integerNode('priority')->defaultValue(0)->end()
+                        ->end()
+                    ->end()
                 ->end()
             ->end()
         ->end();