# HG changeset patch
# User Ingo Weinzierl <ingo.weinzierl@intevation.de>
# Date 1299005568 0
# Node ID bfa65a812c7a6a79d8dae1b6c60cbd14c005d79f
# Parent  0245a87df368546975bd5f7f90e1144604d3f935
Made the backend singleton.

artifacts/trunk@1352 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r 0245a87df368 -r bfa65a812c7a ChangeLog
--- a/ChangeLog	Tue Mar 01 18:45:34 2011 +0000
+++ b/ChangeLog	Tue Mar 01 18:52:48 2011 +0000
@@ -1,3 +1,11 @@
+2011-03-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java:
+	  Made it a singleton.
+
+	* artifact-database/src/main/java/de/intevation/artifactdatabase/App.java:
+	  Use the singleton Backend.
+
 2011-03-01  Ingo Weinzierl <ingo@intevation.de>
 
 	* artifact-database/src/main/java/de/intevation/artifactdatabase/ArtifactDatabaseImpl.java:
diff -r 0245a87df368 -r bfa65a812c7a artifact-database/src/main/java/de/intevation/artifactdatabase/App.java
--- a/artifact-database/src/main/java/de/intevation/artifactdatabase/App.java	Tue Mar 01 18:45:34 2011 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/App.java	Tue Mar 01 18:52:48 2011 +0000
@@ -62,7 +62,7 @@
 
         bootstrap.boot();
 
-        Backend backend = new Backend();
+        Backend backend = Backend.getInstance();
 
         ArtifactDatabaseImpl db = new ArtifactDatabaseImpl(
             bootstrap, backend);
diff -r 0245a87df368 -r bfa65a812c7a artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java
--- a/artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java	Tue Mar 01 18:45:34 2011 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java	Tue Mar 01 18:52:48 2011 +0000
@@ -80,6 +80,9 @@
     public static final String SQL_REPLACE =
         SQL.get("artifacts.replace");
 
+    /** The singleton.*/
+    protected static Backend instance;
+
     /**
      * The database cleaner. Reference is stored here because
      * the cleaner is woken up if the backend finds an outdated
@@ -207,6 +210,20 @@
         this.cleaner = cleaner;
     }
 
+
+    /**
+     * Returns the singleton of this Backend.
+     *
+     * @return the backend.
+     */
+    public static synchronized Backend getInstance() {
+        if (instance == null) {
+            instance = new Backend();
+        }
+
+        return instance;
+    }
+
     /**
      * Sets the factory lookup mechanism to decouple ArtifactDatabase
      * and Backend.