系统异常了，上篇是通过在全局异常中通过调用发送邮件的处理器代码进行邮件的发送，总是觉得还不那么优雅。
这篇是通过扩展 logback 的日志插件来处理 err 级别的日志异常信息来发送邮件的。
通过这篇的学习，可以掌握如何扩展 logback 的日志类，来实现自己不可告人的目的。
下面直接上代码。
首先自定义一个日志处理处理类 wlcLogLogbackAppender。
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.classic.spi.ThrowableProxy;
import ch.qos.logback.core.AppenderBase;
import com.handler.WlcAsyncHandler;
import com.utils.SpringContextUtil;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.util.Objects;
/**
* 描述: 自定义日志处理类 <br>
* 时间: 2021-07-01 11:11 <br>
* 作者：IT学习道场
*/
public class wlcLogLogbackAppender extends AppenderBase<LoggingEvent> {
protected void append(LoggingEvent eventObject) {
if(eventObject instanceof LoggingEvent){
LoggingEvent loggingEvent = (LoggingEvent)eventObject;
//拿到ThrowableProxy
ThrowableProxy throwableProxy = (ThrowableProxy) loggingEvent.getThrowableProxy();
if (Objects.nonNull(throwableProxy)) {
//获取 throwable 顶级异常
Throwable throwable = throwableProxy.getThrowable();
//获取log的msg
String formattedMessage = loggingEvent.getFormattedMessage();
//获取请求request
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder
.getRequestAttributes()).getRequest();
//获取spring的spring.mail.enable属性值，下面的逻辑你也可以自己根据想法自己玩也行
String mailEnableProperty = SpringContextUtil.getEnvironmentProperty("spring.mail.enable");
mailEnableProperty = (mailEnableProperty == null) ? "false" : mailEnableProperty;
boolean mailEnable = Boolean.valueOf(mailEnableProperty);
if (mailEnable){
//获取邮件的处理类
WlcAsyncHandler emailHandler = SpringContextUtil.getBean(WlcAsyncHandler.class);
emailHandler.handle(formattedMessage, throwable, request);
}
}
}
super.doAppend(eventObject);
}
}