svn commit: r948333 - in /ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache: UtilCache.java test/UtilCacheTests.java

[doogie]

Author: doogie
Date: Wed May 26 06:04:59 2010
New Revision: 948333

URL: http://svn.apache.org/viewvc?rev=948333&view=rev
Log:
Add putIfAbsent method; disk-based variant of this method is not yet
tested.

Modified:
    ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/UtilCache.java
    
ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/test/UtilCacheTests.java

Modified: 
ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/UtilCache.java
URL: 
http://svn.apache.org/viewvc/ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/UtilCache.java?rev=948333&r1=948332&r2=948333&view=diff
==============================================================================
--- ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/UtilCache.java 
(original)
+++ ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/UtilCache.java Wed 
May 26 06:04:59 2010
@@ -291,6 +291,10 @@ public class UtilCache<K, V> implements 
         return putInternal(key, value, expireTimeNanos);
     }
 
+    public V putIfAbsent(K key, V value) {
+        return putIfAbsentInternal(key, value, expireTimeNanos);
+    }
+
     CacheLine<V> createSoftRefCacheLine(final Object key, V value, long 
loadTimeNanos, long expireTimeNanos) {
         return tryRegister(loadTimeNanos, new SoftRefCacheLine<V>(value, 
loadTimeNanos, expireTimeNanos) {
             @Override
@@ -368,6 +372,10 @@ public class UtilCache<K, V> implements 
         return putInternal(key, value, 
TimeUnit.NANOSECONDS.convert(expireTimeMillis, TimeUnit.MILLISECONDS));
     }
 
+    public V putIfAbsent(K key, V value, long expireTimeMillis) {
+        return putIfAbsentInternal(key, value, 
TimeUnit.NANOSECONDS.convert(expireTimeMillis, TimeUnit.MILLISECONDS));
+    }
+
     V putInternal(K key, V value, long expireTimeNanos) {
         Object nulledKey = fromKey(key);
         CacheLine<V> oldCacheLine = memoryTable.put(nulledKey, 
createCacheLine(key, value, expireTimeNanos));
@@ -392,6 +400,41 @@ public class UtilCache<K, V> implements 
         }
     }
 
+    V putIfAbsentInternal(K key, V value, long expireTimeNanos) {
+        Object nulledKey = fromKey(key);
+        V oldValue;
+        if (fileTable != null) {
+            try {
+                synchronized (this) {
+                    oldValue = fileTable.get(nulledKey);
+                    if (oldValue == null) {
+                        memoryTable.put(nulledKey, createCacheLine(key, value, 
expireTimeNanos));
+                        fileTable.put(nulledKey, value);
+                        jdbmMgr.commit();
+                    }
+                }
+            } catch (IOException e) {
+                Debug.logError(e, module);
+                oldValue = null;
+            }
+        } else {
+            CacheLine<V> newCacheLine = createCacheLine(key, value, 
expireTimeNanos);
+            CacheLine<V> oldCacheLine = memoryTable.putIfAbsent(nulledKey, 
newCacheLine);
+            if (oldCacheLine == null) {
+                oldValue = null;
+            } else {
+                oldValue = oldCacheLine.getValue();
+                cancel(newCacheLine);
+            }
+        }
+        if (oldValue == null) {
+            noteAddition(key, value);
+            return null;
+        } else {
+            return oldValue;
+        }
+    }
+
     /** Gets an element from the cache according to the specified key.
      * @param key The key for the element, used to reference it in the 
hastables and LRU linked list
      * @return The value of the element specified by the key

Modified: 
ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/test/UtilCacheTests.java
URL: 
http://svn.apache.org/viewvc/ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/test/UtilCacheTests.java?rev=948333&r1=948332&r2=948333&view=diff
==============================================================================
--- 
ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/test/UtilCacheTests.java
 (original)
+++ 
ofbiz/trunk/framework/base/src/org/ofbiz/base/util/cache/test/UtilCacheTests.java
 Wed May 26 06:04:59 2010
@@ -323,6 +323,19 @@ public class UtilCacheTests extends Gene
         basicTest(cache);
     }
 
+    public void testPutIfAbsent() throws Exception {
+        UtilCache<String, String> cache = createUtilCache(5, 5, 2000, false, 
false);
+        Listener<String, String> gotListener = createListener(cache);
+        Listener<String, String> wantedListener = new Listener<String, 
String>();
+        wantedListener.noteKeyAddition(cache, "two", "dos");
+        assertNull("putIfAbsent", cache.putIfAbsent("two", "dos"));
+        assertHasSingleKey(cache, "two", "dos");
+        assertEquals("putIfAbsent", "dos", cache.putIfAbsent("two", "double"));
+        assertHasSingleKey(cache, "two", "dos");
+        cache.removeListener(gotListener);
+        assertEquals("listener", wantedListener, gotListener);
+    }
+
     public void testChangeMemSize() throws Exception {
         int size = 5;
         long ttl = 2000;