Java ConcurrentMap createConcurrentMap()

Description

INTERNAL: Creates new concurrent java.util.Map instance.

License

Apache License

Declaration

public static <K, V> Map<K, V> createConcurrentMap() 

Method Source Code

//package com.java2s;
/*//w w  w  .j  ava2s.  c  o  m
 * #!
 * Ontopia Engine
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * 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.
 * !#
 */

import java.util.Collections;
import java.util.HashMap;

import java.util.Map;

public class Main {
    /**
     * INTERNAL: Creates new concurrent java.util.Map instance.
     */
    public static <K, V> Map<K, V> createConcurrentMap() {
        try {
            Class<?> klass = Class.forName("java.util.concurrent.ConcurrentHashMap");
            return (Map<K, V>) klass.newInstance();
        } catch (Exception e1) {
            try {
                Class<?> klass = Class.forName("EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap");
                return (Map<K, V>) klass.newInstance();
            } catch (Exception e2) {
                return Collections.synchronizedMap(new HashMap<K, V>());
            }
        }
    }
}

Related

1. addIfAbsent(K key, ConcurrentMap map, Object value)
2. clearClassMapping()
3. clearDefaultResourceBundles()
4. create(boolean sorted)
5. createConcurrentMap()
6. createConcurrentMap(int initial_capacity, float load_factor, int concurrency_level)
7. extractKeySize(String sslCipherSuite)
8. fileReaderDecrement(ConcurrentMap readers, Long fileNum)
9. fileReaderIncrement(ConcurrentMap readers, Long fileNum)