/*
+ * 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 static java.util.Objects.requireNonNull;
+
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+import java.util.Objects;
+import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
+import org.opendaylight.yangtools.concepts.Immutable;
import org.opendaylight.yangtools.yang.common.QName;
-import java.util.HashMap;
-import java.util.Map;
+public final class QNameFactory {
+ public static final class Key implements Immutable {
+ private final @NonNull String localName;
+ private final @NonNull String namespace;
+ private final @Nullable String revision;
-public class QNameFactory {
- private static final Map<String, QName> cache = new HashMap<>();
+ public Key(final String localName, final String namespace, final String revision) {
+ this.localName = requireNonNull(localName);
+ this.namespace = requireNonNull(namespace);
+ this.revision = revision;
+ }
- 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);
- }
+ @Override
+ public int hashCode() {
+ return Objects.hash(localName, namespace, revision);
+ }
+
+ @Override
+ public boolean equals(final Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (!(obj instanceof Key)) {
+ return false;
}
+ final Key other = (Key) obj;
+ return localName.equals(other.localName) && namespace.equals(other.namespace)
+ && Objects.equals(revision, other.revision);
}
- return value;
+
+ QName toQName() {
+ return revision != null ? QName.create(namespace, revision, localName) : QName.create(namespace, localName);
+ }
+ }
+
+ private static final int MAX_QNAME_CACHE_SIZE = Integer.getInteger(
+ "org.opendaylight.controller.cluster.datastore.node.utils.qname-cache.max-size", 10000);
+
+ private static final LoadingCache<String, QName> STRING_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();
+ }
+ });
+
+ private static final LoadingCache<Key, QName> KEY_CACHE = CacheBuilder.newBuilder()
+ .maximumSize(MAX_QNAME_CACHE_SIZE).weakValues().build(new CacheLoader<Key, QName>() {
+ @Override
+ public QName load(final Key key) {
+ return key.toQName().intern();
+ }
+ });
+
+ private QNameFactory() {
+
+ }
+
+ @Deprecated
+ public static QName create(final String name) {
+ return STRING_CACHE.getUnchecked(name);
+ }
+
+ public static QName create(final Key key) {
+ return KEY_CACHE.getUnchecked(key);
}
}