Mercurial > hg > blitz_condensed

comparison src/org/dancres/blitz/meta/RegistryFactory.java @ 0:3dc0c5604566

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:3dc0c5604566
1 package org.dancres.blitz.meta;
2
3 import java.io.File;
4 import java.io.IOException;
5
6 import java.util.Map;
7 import java.util.HashMap;
8
9 import org.dancres.blitz.disk.Disk;
10
11 public class RegistryFactory {
12 private static Map theMetas = new HashMap();
13
14 /**
15 @param aName the name of the registry you wish to load/create
16 @param anInitializer Registry instances are created under a transaction.
17 Certain uses may require that initialization be done under the same
18 transaction. In these cases, the caller should pass in an Initializer
19 instance containing the appropriate "boot code". If no initialization
20 is required, the caller may pass <code>null</code>.
21 */
22 public static Registry get(String aName, Initializer anInitializer)
23 throws IOException {
24
25 synchronized(theMetas) {
26 Registry myData = (Registry) theMetas.get(aName);
27
28 if (myData == null) {
29 myData = new RegistryImpl(aName, anInitializer);
30 theMetas.put(aName, myData);
31 }
32
33 return myData;
34 }
35 }
36
37 public static boolean exists(String aName) {
38 return RegistryImpl.exists(aName);
39 }
40
41 public static void delete(String aName) throws IOException {
42 synchronized(theMetas) {
43 RegistryImpl myData = (RegistryImpl) theMetas.get(aName);
44
45 if (myData != null) {
46 theMetas.remove(aName);
47 myData.delete();
48 }
49 }
50 }
51 }