/*
+ * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others. All rights reserved.
*
- * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
*/
-
package org.opendaylight.controller.cluster.datastore.node.utils;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
import org.opendaylight.yangtools.yang.common.QName;
-import java.util.HashMap;
-import java.util.Map;
-
-public class QNameFactory {
- private static final Map<String, QName> cache = new HashMap<>();
+public final class QNameFactory {
+ private static final int MAX_QNAME_CACHE_SIZE = Integer.getInteger(
+ "org.opendaylight.controller.cluster.datastore.node.utils.qname-cache.max-size", 10000);
- public static QName create(String name){
- QName value = cache.get(name);
- if(value == null){
- synchronized (cache){
- value = cache.get(name);
- if(value == null) {
- value = QName.create(name);
- cache.put(name, value);
+ private static final LoadingCache<String, QName> CACHE = CacheBuilder.newBuilder().maximumSize(MAX_QNAME_CACHE_SIZE)
+ .weakValues().build(new CacheLoader<String, QName>() {
+ @Override
+ public QName load(final String key) {
+ return QName.create(key).intern();
}
- }
- }
- return value;
+ });
+
+ private QNameFactory() {
+
+ }
+
+ public static QName create(final String name) {
+ return CACHE.getUnchecked(name);
}
}