From 770b3c7364dcea139eb5a2204b3648c4825e3f69 Mon Sep 17 00:00:00 2001
From: Silvio <silvio@devlet.com.br>
Date: Fri, 23 Jul 2010 17:53:51 -0300
Subject: Adding a perl singleton

---
 classes/BiblioIsisDb.php  |  3 ++-
 classes/PerlSingleton.php | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 classes/PerlSingleton.php

diff --git a/classes/BiblioIsisDb.php b/classes/BiblioIsisDb.php
index 22586ed..ee3441c 100644
--- a/classes/BiblioIsisDb.php
+++ b/classes/BiblioIsisDb.php
@@ -42,7 +42,8 @@ class BiblioIsisDb implements IsisDb {
     }
 
     // Create a perl instance.
-    $this->perl = new Perl();
+    //$this->perl = new Perl();
+    $this->perl = PerlSingleton::getInstance();
   }
 
   /**
diff --git a/classes/PerlSingleton.php b/classes/PerlSingleton.php
new file mode 100644
index 0000000..c606cfe
--- /dev/null
+++ b/classes/PerlSingleton.php
@@ -0,0 +1,17 @@
+<?php
+
+class PerlSingleton {
+  private static $instance = null;
+
+  private function __construct() {
+    $this->perl = new Perl();
+  }
+
+  public static function getInstance() {
+    if(self::$instance == null) {
+      self::$instance = new self;
+    }
+
+    return self::$instance->perl;
+  }  
+}
-- 
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