org.wildfly.naming.client.util.FastHashtable Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.naming.client.util;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.BiConsumer;
import java.util.function.BiFunction;
import java.util.function.Function;
/**
* A hashtable that is implemented in terms of a fast concurrent map instead of a slow synchronized hash table.
*
* @author David M. Lloyd
*/
public class FastHashtable extends Hashtable {
private static final long serialVersionUID = 85183000443454665L;
private final ConcurrentHashMap backingMap;
public FastHashtable(final int initialCapacity, final float loadFactor) {
super(0);
backingMap = new ConcurrentHashMap<>(initialCapacity, loadFactor);
}
public FastHashtable(final int initialCapacity) {
super(0);
backingMap = new ConcurrentHashMap<>(initialCapacity);
}
public FastHashtable() {
super(0);
backingMap = new ConcurrentHashMap<>();
}
@SuppressWarnings("unchecked")
public FastHashtable(final Map extends K, ? extends V> t) {
super(0);
backingMap = new ConcurrentHashMap<>(t instanceof FastHashtable ? ((FastHashtable extends K, ? extends V>)t).backingMap : t);
}
public int size() {
return backingMap.size();
}
public boolean isEmpty() {
return backingMap.isEmpty();
}
public V get(final Object key) {
return backingMap.get(key);
}
public boolean containsKey(final Object key) {
return backingMap.containsKey(key);
}
public boolean containsValue(final Object value) {
return backingMap.containsValue(value);
}
public V put(final K key, final V value) {
return backingMap.put(key, value);
}
public void putAll(final Map extends K, ? extends V> m) {
backingMap.putAll(m);
}
public V remove(final Object key) {
return backingMap.remove(key);
}
public void clear() {
backingMap.clear();
}
public ConcurrentHashMap.KeySetView keySet() {
return backingMap.keySet();
}
public Collection values() {
return backingMap.values();
}
public Set> entrySet() {
return backingMap.entrySet();
}
public int hashCode() {
return System.identityHashCode(this);
}
public String toString() {
return backingMap.toString();
}
public boolean equals(final Object o) {
return this == o;
}
public V putIfAbsent(final K key, final V value) {
return backingMap.putIfAbsent(key, value);
}
public boolean remove(final Object key, final Object value) {
return backingMap.remove(key, value);
}
public boolean replace(final K key, final V oldValue, final V newValue) {
return backingMap.replace(key, oldValue, newValue);
}
public V replace(final K key, final V value) {
return backingMap.replace(key, value);
}
public V getOrDefault(final Object key, final V defaultValue) {
return backingMap.getOrDefault(key, defaultValue);
}
public void forEach(final BiConsumer super K, ? super V> action) {
backingMap.forEach(action);
}
public void replaceAll(final BiFunction super K, ? super V, ? extends V> function) {
backingMap.replaceAll(function);
}
public V computeIfAbsent(final K key, final Function super K, ? extends V> mappingFunction) {
return backingMap.computeIfAbsent(key, mappingFunction);
}
public V computeIfPresent(final K key, final BiFunction super K, ? super V, ? extends V> remappingFunction) {
return backingMap.computeIfPresent(key, remappingFunction);
}
public V compute(final K key, final BiFunction super K, ? super V, ? extends V> remappingFunction) {
return backingMap.compute(key, remappingFunction);
}
public V merge(final K key, final V value, final BiFunction super V, ? super V, ? extends V> remappingFunction) {
return backingMap.merge(key, value, remappingFunction);
}
public boolean contains(final Object value) {
return backingMap.contains(value);
}
public Enumeration keys() {
return backingMap.keys();
}
public Enumeration elements() {
return backingMap.elements();
}
public FastHashtable clone() {
return new FastHashtable<>(this);
}
protected void rehash() {
// no-op
}
public long mappingCount() {
return backingMap.mappingCount();
}
public ConcurrentHashMap.KeySetView keySet(final V mappedValue) {
return backingMap.keySet(mappedValue);
}
public static FastHashtable of(final Hashtable other) {
if (other instanceof FastHashtable) {
return (FastHashtable) other;
} else {
return new FastHashtable<>(other);
}
}
}