com.taobao.middleware.logger.LoggerFactory Maven / Gradle / Ivy

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package com.taobao.middleware.logger;

import com.taobao.middleware.logger.log4j.Log4jLoggerFactory;
import com.taobao.middleware.logger.nop.NopLoggerFactory;
import com.taobao.middleware.logger.slf4j.Slf4jLoggerFactory;
import com.taobao.middleware.logger.support.ILoggerFactory;
import com.taobao.middleware.logger.support.LogLog;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 *  * 阿里中间件LoggerFactory，获取具体日志实现
 * 
 * 目前支持log4j/slf4j/jcl日志门面和log4j/logback日志实现：
 * log4j
 * slf4j + logback
 * slf4j + slf4j-log4j12 + log4j
 * jcl + log4j
 * jcl + jcl-over-slf4j + slf4j + logback
 * 
 * 
 * 
 * @author zhuyong 2014年3月20日 上午10:17:33
 */
public class LoggerFactory {

    private LoggerFactory(){
    }

    private static volatile ILoggerFactory LOGGER_FACTORY;
    private static Map     loggerCache;

    // 查找常用的日志框架
    static {
        try {
            setLoggerFactory(new Slf4jLoggerFactory());
            LogLog.info("Init JM logger with Slf4jLoggerFactory success, " + LoggerFactory.class.getClassLoader());
        } catch (Throwable e1) {
            try {
                setLoggerFactory(new Log4jLoggerFactory());
                LogLog.info("Init JM logger with Log4jLoggerFactory, " + LoggerFactory.class.getClassLoader());
            } catch (Throwable e2) {
                setLoggerFactory(new NopLoggerFactory());
                LogLog.warn("Init JM logger with NopLoggerFactory, pay attention. "
                                    + LoggerFactory.class.getClassLoader(), e2);
            }
        }

        loggerCache = new ConcurrentHashMap();
    }

    public static Logger getLogger(String name) {
        Logger logger = loggerCache.get(name);
        if (logger == null) {
            synchronized (LOGGER_FACTORY) {
                logger = loggerCache.get(name);
                if (logger == null) {
                    logger = LOGGER_FACTORY.getLogger(name);
                    loggerCache.put(name, logger);
                }
            }
        }
        return logger;
    }

    public static Logger getLogger(Class clazz) {
        return getLogger(clazz.getName());
    }

    private static void setLoggerFactory(ILoggerFactory loggerFactory) {
        if (loggerFactory != null) {
            LoggerFactory.LOGGER_FACTORY = loggerFactory;
        }
    }
}