Adding a perl singleton

2 files changed, 19 insertions, 1 deletions

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;
+  }  
+}