Jalview-JS/JAL-3253-applet fix for original desktop, centralizing regex

[jalview.git] / src / jalview / rest / RestHandler.java

diff --git a/src/jalview/rest/RestHandler.java b/src/jalview/rest/RestHandler.java
index 488e9f0..7c8c9a6 100644 (file)
--- a/src/jalview/rest/RestHandler.java
+++ b/src/jalview/rest/RestHandler.java
@@ -1,5 +1,27 @@
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
 package jalview.rest;
 
+import jalview.bin.ApplicationSingletonProvider;
+import jalview.bin.ApplicationSingletonProvider.ApplicationSingletonI;
 import jalview.httpserver.AbstractRequestHandler;
 
 import java.io.IOException;
@@ -10,20 +32,16 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 /**
- * A simple handler to process (or delegate) HTTP requests on /jalview/rest
+ * A simple handler to process (or delegate) HTTP requests on /jalview/rest.
  */
 public class RestHandler extends AbstractRequestHandler
+        implements ApplicationSingletonI
 {
   private static final String MY_PATH = "rest";
 
   private static final String MY_NAME = "Rest";
 
   /**
-   * Singleton instance of this class
-   */
-  private static RestHandler instance = null;
-
-  /**
    * Returns the singleton instance of this class
    * 
    * @return
@@ -33,12 +51,8 @@ public class RestHandler extends AbstractRequestHandler
   {
     synchronized (RestHandler.class)
     {
-      if (instance == null)
-      {
-        instance = new RestHandler();
-      }
+      return (RestHandler) ApplicationSingletonProvider.getInstance(RestHandler.class);
     }
-    return instance;
   }
 
   /**