X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=source%2Fmircoders%2Fstorage%2FDatabaseUsers.java;h=74be88ca54796727274f2926674e88dc29130301;hb=bcd0c64b09ce0e8f3e6260f76f3a253863c74e60;hp=8f8c211e90fd843cfa4b4f0adeb07a2156e52a87;hpb=c6a2204d8d75293256fd17c07e54971d7672359a;p=mir.git

diff --git a/source/mircoders/storage/DatabaseUsers.java b/source/mircoders/storage/DatabaseUsers.java
index 8f8c211e..74be88ca 100755
--- a/source/mircoders/storage/DatabaseUsers.java
+++ b/source/mircoders/storage/DatabaseUsers.java
@@ -1,3 +1,34 @@
+/*
+ * Copyright (C) 2001, 2002  The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir 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 Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with the com.oreilly.servlet library, any library
+ * licensed under the Apache Software License, The Sun (tm) Java Advanced
+ * Imaging library (JAI), The Sun JIMI library (or with modified versions of
+ * the above that use the same license as the above), and distribute linked
+ * combinations including the two.  You must obey the GNU General Public
+ * License in all respects for all of the code used other than the above
+ * mentioned libraries.  If you modify this file, you may extend this exception
+ * to your version of the file, but you are not obligated to do so.  If you do
+ * not wish to do so, delete this exception statement from your version.
+ */
+
 package mircoders.storage;
 
 import java.lang.*;
@@ -21,7 +52,11 @@ public class DatabaseUsers extends Database implements StorageObject{
 
 	private static DatabaseUsers instance;
 
-	public static DatabaseUsers getInstance() throws StorageObjectException {
+	// the following *has* to be sychronized cause this static method
+	// could get preemted and we could end up with 2 instances of DatabaseFoo..
+	// see the "Singletons with needles and thread" article at JavaWorld -mh
+	public synchronized static DatabaseUsers getInstance() 
+	  throws StorageObjectException {
 		if (instance == null) {
 			instance = new DatabaseUsers();
 			instance.myselfDatabase = instance;