Merge pull request #12 from texthtml/feature/factory-interface

add \TH\Lock\Factory interface

spec/TH/Lock/FileFactorySpec.php

@@ -22,6 +22,7 @@ public function let()
     public function it_is_initializable()
     {
         $this->shouldHaveType('TH\Lock\FileFactory');
+        $this->shouldImplement('TH\Lock\Factory');
     }
 
     public function it_should_create_a_file_lock()

src/Factory.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace TH\Lock;
+
+interface Factory
+{
+    /**
+     * Create a Lock for $resource
+     *
+     * @param string $resource  resource identifier
+     * @return Lock
+     */
+    public function create($resource);
+}

src/FileFactory.php

@@ -5,7 +5,7 @@
 use Psr\Log\LoggerInterface;
 use Psr\Log\NullLogger;
 
-class FileFactory
+class FileFactory implements Factory
 {
     private $lock_dir;
     private $hash_algo;

src/TtlFactory.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace TH\Lock;
+
+interface TtlFactory extends Factory
+{
+    /**
+     * Create a Lock for $resource
+     *
+     * @param string $resource  resource identifier
+     * @param integer $ttl      lock time-to-live in milliseconds
+     * @return Lock
+     */
+    public function create($resource, $ttl = null);
+}