donaldp 2002/08/30 21:56:08
Modified: i18n/src/java/org/apache/avalon/excalibur/i18n
ResourceManager.java
Log:
Add a method to clear the whole cahce. Protect it with a runtime permission.
Revision Changes Path
1.17 +40 -10
jakarta-avalon-excalibur/i18n/src/java/org/apache/avalon/excalibur/i18n/ResourceManager.java
Index: ResourceManager.java
===================================================================
RCS file:
/home/cvs/jakarta-avalon-excalibur/i18n/src/java/org/apache/avalon/excalibur/i18n/ResourceManager.java,v
retrieving revision 1.16
retrieving revision 1.17
diff -u -r1.16 -r1.17
--- ResourceManager.java 31 Aug 2002 04:31:27 -0000 1.16
+++ ResourceManager.java 31 Aug 2002 04:56:08 -0000 1.17
@@ -17,6 +17,11 @@
*/
public class ResourceManager
{
+ /**
+ * Permission needed to clear complete cache.
+ */
+ private static final RuntimePermission CLEAR_CACHE_PERMISSION =
+ new RuntimePermission( "i18n.clearCompleteCache" );
private static final HashMap c_resources = new HashMap();
/**
@@ -37,17 +42,42 @@
* @param classLoader the classLoader to load resources from
* @return the Resources
*/
- public static final Resources getBaseResources( final String baseName,
- final ClassLoader
classLoader )
+ public synchronized static final Resources getBaseResources( final
String baseName,
+ final
ClassLoader classLoader )
+ {
+ Resources resources = getCachedResource( baseName );
+ if( null == resources )
+ {
+ resources = new Resources( baseName, classLoader );
+ putCachedResource( baseName, resources );
+ }
+
+ return resources;
+ }
+
+ /**
+ * Clear the cache of all resources currently loaded into the
+ * system. This method is useful if you need to dump the complete
+ * cache and because part of the application is reloading and
+ * thus the resources may need to be reloaded.
+ *
+ * <p>Note that the caller must have been granted the
+ * "i18n.clearCompleteCache" [EMAIL PROTECTED] RuntimePermission} or
+ * else a security exception will be thrown.</p>
+ *
+ * @throws SecurityException if the caller does not have
+ * permission to clear cache
+ */
+ public synchronized static final void clearResourceCache()
+ throws SecurityException
{
- Resources packet = getCachedResource( baseName );
- if( null == packet )
+ final SecurityManager sm = System.getSecurityManager();
+ if( null != sm )
{
- packet = new Resources( baseName, classLoader );
- putCachedResource( baseName, packet );
+ sm.checkPermission( CLEAR_CACHE_PERMISSION );
}
- return packet;
+ c_resources.clear();
}
/**
@@ -56,8 +86,8 @@
* @param baseName the resource key
* @param resources the resources object
*/
- private static final void putCachedResource( final String baseName,
- final Resources resources )
+ private synchronized static final void putCachedResource( final String
baseName,
+ final
Resources resources )
{
c_resources.put( baseName,
new WeakReference( resources ) );
@@ -69,7 +99,7 @@
* @param baseName the resource key
* @return resources the resources object
*/
- private static final Resources getCachedResource( final String baseName )
+ private synchronized static final Resources getCachedResource( final
String baseName )
{
final WeakReference weakReference =
(WeakReference)c_resources.get( baseName );
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