logback笔记

概述

配置错误日志发送到指定邮箱

<appender name="EMAIL" class="com.ppdai.logclient.logback.MailAppender">
        <evaluator class="com.ppdai.logback.SMTPFrequencyEvaluator">
            <maxCount>1000</maxCount>
            <expiredTime>300</expiredTime>
        </evaluator>
        <cyclicBufferTracker class="ch.qos.logback.core.spi.CyclicBufferTracker">
            <bufferSize>1</bufferSize>
        </cyclicBufferTracker>
        <smtpHost>smtp.awesome.com</smtpHost>
        <smtpPort>25</smtpPort>
        <username>[email protected]</username>
        <password></password>
        <to>[email protected]</to>
        <from>[email protected]</from>
        <subject>【cloud_iview报错邮件】%X{ip}: %logger{20} - %m 累积错误数：%X{error_count}
        </subject>
        <layout class="ch.qos.logback.classic.html.HTMLLayout">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}%level%thread%logger{35}%message
            </pattern>
        </layout>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

SMTPAppender为logback里面提供的API，继续该API的MailAppender源码如下：

public class MailAppender extends SMTPAppender {
    public MailAppender() {
    }

    protected void append(ILoggingEvent leo) {
        VariableLoggingEventVO eventVO = VariableLoggingEventVO.build(leo);
        this.filter(eventVO);
        super.append(eventVO);
    }

    private void filter(VariableLoggingEventVO eventVO) {
        Map<String, String> newMdc = new HashMap(eventVO.getMdc());
        eventVO.setMdcPropertyMap(newMdc);
        eventVO.setFormattedMessage(Desensitiver.desensitive(eventVO.getFormattedMessage()));
    }
}

public class Desensitiver {
    public Desensitiver() {
    }

    public static String desensitive(String source) {
        return PhoneDesensitiver.filterPhone(IdCardDesensitiver.filterIdCard(source));
    }
}