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From lhazlew...@apache.org
Subject svn commit: r893244 - in /incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache: DefaultCacheManager.java SoftHashMapCache.java
Date Tue, 22 Dec 2009 17:38:57 GMT
Author: lhazlewood
Date: Tue Dec 22 17:38:56 2009
New Revision: 893244

URL: http://svn.apache.org/viewvc?rev=893244&view=rev
Log:
Changed DefaultCacheManager to use a ConcurrentMap to manage Cache instances.  SoftHashMapCache
now implements Destroyable, clearing out its memory at shutdown.

Modified:
    incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/DefaultCacheManager.java
    incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/SoftHashMapCache.java

Modified: incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/DefaultCacheManager.java
URL: http://svn.apache.org/viewvc/incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/DefaultCacheManager.java?rev=893244&r1=893243&r2=893244&view=diff
==============================================================================
--- incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/DefaultCacheManager.java
(original)
+++ incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/DefaultCacheManager.java
Tue Dec 22 17:38:56 2009
@@ -18,20 +18,21 @@
  */
 package org.apache.shiro.cache;
 
-import java.util.HashMap;
-import java.util.Map;
-
 import org.apache.shiro.util.Destroyable;
 import org.apache.shiro.util.LifecycleUtils;
 
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
 
 /**
  * Default memory-only based {@link CacheManager CacheManager} implementation usable in production
environments.
  * <p/>
  * This implementation does not offer any enterprise-level features such as cache coherency,
optimistic locking,
- * failover or other similar features.  It relies on memory-based {@link java.util.Map Map}
caches.  For more
- * enterprise features, consider using an {@link org.apache.shiro.cache.ehcache.EhCacheManager
EhCacheManager} or other
- * similar implementation that wraps an enterprise-grade Caching solution.
+ * failover or other similar features.  It relies on memory-based {@link SoftHashMapCache}
instances to ensure there
+ * are no memory leaks.  For more enterprise features, consider using an
+ * {@code org.apache.shiro.cache.ehcache.EhCacheManager} or other similar implementation
that wraps an enterprise-grade
+ * Caching solution.
  *
  * @author Les Hazlewood
  * @since 1.0
@@ -41,7 +42,7 @@
     /**
      * Retains all Cache objects maintained by this cache manager.
      */
-    private final Map<String, Cache> caches = new HashMap<String, Cache>();
+    private final ConcurrentMap<String, Cache> caches = new ConcurrentHashMap<String,
Cache>();
 
     public Cache getCache(String name) throws CacheException {
         if (name == null) {
@@ -50,11 +51,12 @@
 
         Cache cache;
 
-        synchronized (caches) {
-            cache = caches.get(name);
-            if (cache == null) {
-                cache = new SoftHashMapCache(name);
-                caches.put(name, cache);
+        cache = caches.get(name);
+        if (cache == null) {
+            cache = new SoftHashMapCache(name);
+            Cache existing = caches.putIfAbsent(name, cache);
+            if (existing != null) {
+                cache = existing;
             }
         }
 

Modified: incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/SoftHashMapCache.java
URL: http://svn.apache.org/viewvc/incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/SoftHashMapCache.java?rev=893244&r1=893243&r2=893244&view=diff
==============================================================================
--- incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/SoftHashMapCache.java
(original)
+++ incubator/shiro/trunk/core/src/main/java/org/apache/shiro/cache/SoftHashMapCache.java
Tue Dec 22 17:38:56 2009
@@ -18,6 +18,7 @@
  */
 package org.apache.shiro.cache;
 
+import org.apache.shiro.util.Destroyable;
 import org.apache.shiro.util.SoftHashMap;
 
 /**
@@ -29,7 +30,7 @@
  * @author Les Hazlewood
  * @since 1.0
  */
-public class SoftHashMapCache extends MapCache {
+public class SoftHashMapCache extends MapCache implements Destroyable {
 
     /**
      * Creates a new <code>SoftHashMapCache</code> instance with the specified
name.
@@ -41,4 +42,11 @@
     public SoftHashMapCache(String name) {
         super(name, new SoftHashMap());
     }
+
+    /**
+     * Calls {@link #clear} to remove all entries.
+     */
+    public void destroy() {
+        clear();
+    }
 }



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