worker tracker stub added

Author: ph4r05

src/Queue/Misc/WorkerTracker.php

@@ -0,0 +1,91 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: dusanklinec
+ * Date: 26/01/2018
+ * Time: 13:01
+ */
+
+namespace ph4r05\LaravelDatabasePh4\Queue\Misc;
+
+/**
+ * Class WorkersTracker
+ *
+ * Uses database table to track active workers currently working on the given queue.
+ * Worker register itself to the DB when created, updates his record during the progress
+ * and deletes the record when terminating. The periodic updating helps to detect
+ * killed workers.
+ *
+ * The number of active workers per queue helps to optimize parameter setup for optimistic
+ * queue locking.
+ *
+ * @package ph4r05\LaravelDatabasePh4\Queue\Misc
+ */
+class WorkerTracker
+{
+    /**
+     * queue -> last ping time
+     * @var array
+     */
+    protected $lastPingMap = [];
+
+    /**
+     * queue -> active workers list
+     * @var array
+     */
+    protected $workersMap = [];
+
+    public function __construct(){
+        // TODO: implement
+    }
+
+    /**
+     * Updates the ping time for the given queue for the current worker.
+     * Can do nothing if the last ping was too recent.
+     *
+     * @param $queue
+     * @param $force bool - override caching, enforce db write
+     */
+    public function tick($queue, $force = false){
+        // TODO: implement
+    }
+
+    /**
+     * Creates the current worker records. Initial step when worker starts.
+     *
+     * @param $queues
+     */
+    public function create($queues){
+        // TODO: implement
+    }
+
+    /**
+     * Destroys records for the current worker.
+     * Called when worker terminates.
+     *
+     * @param $queues
+     */
+    public function destroy($queues){
+        // TODO: implement
+    }
+
+    /**
+     * Returns number of workers active for the queue.
+     * @param $queue
+     */
+    public function getNumWorkers($queue){
+        // TODO: implement
+    }
+
+
+}
+
+/**
+ * Class WorkerRecord
+ * Helper wrapper for loading active workers.
+ * @package ph4r05\LaravelDatabasePh4\Queue\Misc
+ */
+class WorkerRecord {
+
+}
+