OF-114: Disable cache purging for Components cache

Also added .gitignore for work and target directories

.gitignore

+target/
+work/
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src/java/org/jivesoftware/util/cache/CacheFactory.java

@@ -419,7 +419,11 @@ public class CacheFactory {
 
     @SuppressWarnings("unchecked")
     private static <T extends Cache> T wrapCache(T cache, String name) {
+    	if ("Routing Components Cache".equals(name)) {
+            cache = (T) new ComponentCacheWrapper(cache);
+    	} else {
             cache = (T) new CacheWrapper(cache);
+    	}
         cache.setName(name);
 
         caches.put(name, cache);

src/java/org/jivesoftware/util/cache/ComponentCacheWrapper.java

+/**
+ * $RCSfile$
+ * $Revision: 3144 $
+ * $Date: 2005-12-01 14:20:11 -0300 (Thu, 01 Dec 2005) $
+ *
+ * Copyright (C) 2004-2008 Jive Software. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jivesoftware.util.cache;
+
+
+/**
+ * This specialized wrapper is used for the Components cache, which
+ * should not be purged.
+ * 
+ * See {@link http://issues.igniterealtime.org/browse/OF-114} for more info.
+ *
+ */
+public class ComponentCacheWrapper<K, V> extends CacheWrapper<K, V> {
+
+    public ComponentCacheWrapper(Cache<K, V> cache) {
+        super(cache);
+    }
+
+    public void clear() {
+        // no-op; we don't want to clear the components cache
+    }
+}
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