com.github.veithen.ulog.AbstractLogFactory.java Source code

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Here is the source code for com.github.veithen.ulog.AbstractLogFactory.java

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/*
 * Copyright 2011 Andreas Veithen
 *
 * 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.github.veithen.ulog;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogConfigurationException;
import org.apache.commons.logging.LogFactory;

public abstract class AbstractLogFactory extends LogFactory {
    private final Map instances = new HashMap();

    public final Log getInstance(Class clazz) throws LogConfigurationException {
        return getInstance(clazz.getName());
    }

    public final Log getInstance(String name) throws LogConfigurationException {
        synchronized (instances) {
            Log instance = (Log) instances.get(name);
            if (instance == null) {
                instance = newInstance(name);
                instances.put(name, instance);
            }
            return instance;
        }
    }

    protected abstract Log newInstance(String name);
}