Added some basic task runner functionality using beanstalkd and the pheanstalk library

composer.json

@@ -19,6 +19,7 @@
         "slim/psr7": "^1.5",
         "slim/twig-view": "^3.3",
         "hassankhan/config": "^3.0",
-        "php-di/php-di": "^6.4"
+        "php-di/php-di": "^6.4",
+        "pda/pheanstalk": "~4.0"
     }
 }

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "e7cbf8cfe22ea0e64510fe92ffbb4c00",
+    "content-hash": "6ac1bc7f15734931ede8901fed3ed3eb",
     "packages": [
         {
             "name": "fig/http-message-util",
@@ -235,6 +235,61 @@
             },
             "time": "2018-02-13T20:26:39+00:00"
         },
+        {
+            "name": "pda/pheanstalk",
+            "version": "v4.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/pheanstalk/pheanstalk.git",
+                "reference": "1a43eb97a53144a2e692bce2ea2be721cc9913a4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/pheanstalk/pheanstalk/zipball/1a43eb97a53144a2e692bce2ea2be721cc9913a4",
+                "reference": "1a43eb97a53144a2e692bce2ea2be721cc9913a4",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": ">=7.1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Pheanstalk\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Paul Annesley",
+                    "email": "paul@annesley.cc",
+                    "homepage": "http://paul.annesley.cc/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sam Mousa",
+                    "email": "sam@mousa.nl",
+                    "role": "Maintainer"
+                }
+            ],
+            "description": "PHP client for beanstalkd queue",
+            "homepage": "https://github.com/pheanstalk/pheanstalk",
+            "keywords": [
+                "beanstalkd"
+            ],
+            "support": {
+                "issues": "https://github.com/pheanstalk/pheanstalk/issues",
+                "source": "https://github.com/pheanstalk/pheanstalk/tree/v4.0.4"
+            },
+            "time": "2021-11-19T15:00:20+00:00"
+        },
         {
             "name": "php-di/invoker",
             "version": "2.3.3",

conf/defaults.json

@@ -1,3 +1,8 @@
 {
-  "server_directory": "/opt/minecraft"
+  "server_directory": "/opt/minecraft",
+
+  "beanstalkd": {
+    "host": "localhost",
+    "port": 11300
+  }
 }

src/Controllers/HomeController.php

@@ -2,6 +2,7 @@
 
 namespace BitGoblin\MCST\Controllers;
 
+use Pheanstalk\Pheanstalk;
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Slim\Views\Twig;
@@ -21,6 +22,12 @@ class HomeController extends Controller {
       array_push($minecraftServers, new Server($m));
     }
 
+    // create pheanstalk object and create a job
+    $pheanstalk = Pheanstalk::create($config->get('beanstalkd.host'), $config->get('beanstalkd.port'));
+    $pheanstalk
+      ->useTube('mcst')
+      ->put("refresh-server-downloads", Pheanstalk::DEFAULT_PRIORITY);
+
     $view = Twig::fromRequest($request);
     return $view->render($response, 'index.twig', [
       'servers' => $minecraftServers,

src/Runners/RefreshServerDownloads.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace BitGoblin\MCST\Runners;
+
+class RefreshServerDownloads {
+
+  protected $config;
+
+  public function __construct($config) {
+    $this->config = $config;
+  }
+
+  public function start() {
+    echo "Refreshing server download URLs...\n";
+  }
+
+}

src/runner.php

@@ -0,0 +1,45 @@
+<?php
+
+use Noodlehaus\Config;
+use Noodlehaus\Parser\Json;
+use Pheanstalk\Pheanstalk;
+
+use BitGoblin\MCST\Runners\RefreshServerDownloads;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+// Load app configuration
+$config = Config::load(__DIR__ . '/../conf/defaults.json');
+
+// create pheanstalk object
+$pheanstalk = Pheanstalk::create($config->get('beanstalkd.host'), $config->get('beanstalkd.port'));
+// we want jobs from 'mcst' tube only.
+$pheanstalk->watch('mcst');
+
+while (true) {
+  echo "Waiting for a new job...\n";
+
+  // try to reserve a job
+  $job = $pheanstalk->reserve();
+
+  // check if we actually got a job before trying to do work
+  if (isset($job)) {
+    $jobPayload = $job->getData();
+    
+    switch ($jobPayload) {
+      case 'refresh-server-downloads':
+        $rsd = new RefreshServerDownloads($config);
+        $rsd->start();
+        break;
+      
+      default:
+        echo "Runner command " . $jobPayload . " isn't supported.\n";
+        break;
+    }
+
+    // remove job
+    $pheanstalk->delete($job);
+  }
+
+  sleep(60);
+}