package com.action.design.pattern.chain;

/**
 * 创建不同类型的记录器。赋予它们不同的错误级别，并在每个记录器中设置下一个记录器。每个记录器中的下一个记录器代表的是链的一部分。
 * Created by wuyunfeng on 2017/6/15.
 */
public class ChainPatternDemo {

    private static AbstractLogger getChainOfLoggers() {
        AbstractLogger errorLogger = new ErrorLogger(AbstractLogger.ERROR);
        AbstractLogger fileLogger = new FileLogger(AbstractLogger.DEBUG);
        AbstractLogger consoleLogger = new ConsoleLogger(AbstractLogger.INFO);

        errorLogger.setNextLogger(fileLogger);
        fileLogger.setNextLogger(consoleLogger);

        return errorLogger;

    }

    public static void main(String[] args) {
        AbstractLogger loggerChain = getChainOfLoggers();

        loggerChain.logMessage(AbstractLogger.INFO, "This is an information.");

        loggerChain.logMessage(AbstractLogger.DEBUG,
                "This is an debug level information.");

        loggerChain.logMessage(AbstractLogger.ERROR,
                "This is an error information.");
    }

}
