LoggerFactorySupport.java example

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/*
 * Copyright (c) 2008-2017, Hazelcast, Inc. 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 com.hazelcast.logging;

import com.hazelcast.util.ConcurrencyUtil;
import com.hazelcast.util.ConstructorFunction;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

public abstract class LoggerFactorySupport implements LoggerFactory {

    final ConcurrentMap<String, ILogger> mapLoggers = new ConcurrentHashMap<String, ILogger>(100);

    final ConstructorFunction<String, ILogger> loggerConstructor
            = new ConstructorFunction<String, ILogger>() {
        public ILogger createNew(String key) {
            return createLogger(key);
        }
    };

    @Override
    public final ILogger getLogger(String name) {
        return ConcurrencyUtil.getOrPutIfAbsent(mapLoggers, name, loggerConstructor);
    }

    protected abstract ILogger createLogger(String name);
}