logback指定时间执行压缩

问题：因日志文件太多，导致logbck每天晚上0点压缩占用CPU太高。

解决方案：指定部分log文件在其它时间进行压缩。

思路：重写 computeNextCheck()，设置nextCheck的值为你需要的时间。

logback.xml：

<appender name="kafkaRecordLog"
   class="ch.qos.logback.core.rolling.RollingFileAppender">
   <filter>
      <level>TRACE</level>
   </filter>
   <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>${log.dir}/。。。-%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern>
           <maxHistory>7</maxHistory>
           <timeBasedFileNamingAndTriggeringPolicy class="com.。。。.server.utils.MySizeAndTimeBasedFNATP">
               <multiple>3</multiple>
               <maxFileSize>5GB</maxFileSize>
           </timeBasedFileNamingAndTriggeringPolicy>
   </rollingPolicy>
   <file>${log.dir}/。。。.log</file>
   <encoder charset="UTF-8"> 
      <pattern>%msg%n</pattern>
   </encoder>
</appender>

java代码：

package com.。。。.server.utils;

import ch.qos.logback.core.joran.spi.NoAutoStart;
import ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP;

import java.util.Calendar;

@NoAutoStart
public class MySizeAndTimeBasedFNATP<E> extends SizeAndTimeBasedFNATP<E> {
    private Integer multiple = 1;

    @Override
    protected void computeNextCheck() {
        Calendar c = Calendar.getInstance();
        c.add(Calendar.DAY_OF_YEAR, 1);
        c.set(Calendar.HOUR_OF_DAY, multiple);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
        nextCheck = c.getTimeInMillis();
    }

    public Integer getMultiple() {
        return multiple;
    }

    public void setMultiple(Integer multiple) {
        if (multiple > 1) {
            this.multiple = multiple;
        }
    }
}