# 日志处理
#### logger名称和描述
Rainbow SDK需要配置的logger名称和描述如[表1]所示。
 表1logger说明 
| Logger名称           | 建议日志级别 | 说明                           |
|:---|:---|:---|
| com.huawei.rainbow | INFO   | Rainbow SDK运行日志，建议打开，方便定位问题。 |
   
#### 日志文件配置样例
- logback.xml 主要配置appender和logger，业务可以根据需要配置。
  file属性需要根据业务的路径进行配置。
  ```
  <appender name="RAINBOW_LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">
          <file>../log/rainbow/rainbow.log</file>  <!-- 路径自己配置-->
          <encoder>
              <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}| [%thread]|%-5level|[%file:%line]|%p|%msg%n</pattern>
          </encoder>
          <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
              <minIndex>1</minIndex>
              <maxIndex>10</maxIndex>
              <FileNamePattern>../log/rainbow/rainbow.log.%i</FileNamePattern>
          </rollingPolicy>
          <triggeringPolicy  class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
              <maxFileSize>20MB</maxFileSize>
          </triggeringPolicy>
  </appender>
  <appender name="RAIBOW_SWITCH_LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">
          <file>../log/rainbow/rainbow_switch.log</file>
          <encoder>
              <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}|%p|%msg%n</pattern>
          </encoder>
          <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
              <minIndex>1</minIndex>
              <maxIndex>10</maxIndex>
              <FileNamePattern>../log/rainbow/rainbow_switch.log.%i</FileNamePattern>
          </rollingPolicy>
          <triggeringPolicy  class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
              <maxFileSize>20MB</maxFileSize>
          </triggeringPolicy>
  </appender>
  <appender name="RAIBOW_STAT_LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">
          <file>../log/rainbow/rainbow_stat.log</file>
          <encoder>
              <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}|%p|%msg%n</pattern>
          </encoder>
          <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
              <minIndex>1</minIndex>
              <maxIndex>10</maxIndex>
              <FileNamePattern>../log/rainbow/rainbow_stat.log.%i</FileNamePattern>
          </rollingPolicy>
          <triggeringPolicy  class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
              <maxFileSize>20MB</maxFileSize>
          </triggeringPolicy>
  </appender>
  <logger name="com.huawei.rainbow" level="INFO" additivity="false">
                       <appender-ref ref="RAINBOW_LOG" />
  </logger>
  ```
  
 
- log4j2.xml 主要配置appender和logger：
  fileName属性需要根据业务的路径进行配置。
  ```
  <RollingRandomAccessFile name="rainbow_log"
               fileName="${logDir}/rainbow/rainbow.log"
               filePattern="${logDir}/rainbow/rainbow.log.%d{yyyy-MM-dd}">
               <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS}|[%t]|%-5level|[%F:%L]|%p|%msg%n"/>
               <Policies>
                   <TimeBasedTriggeringPolicy/>
               </Policies>
  </RollingRandomAccessFile>      
  <RollingRandomAccessFile name="rainbow_stat"
               fileName="${logDir}/rainbow/rainbow_stat.log"
               filePattern="${logDir}/rainbow/rainbow_stat.log.%d{yyyy-MM-dd}">
               <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS}|%msg%n"/>
               <Policies>
                   <TimeBasedTriggeringPolicy/>
               </Policies>
  </RollingRandomAccessFile>
  <RollingRandomAccessFile name="rainbow_switch"
               fileName="${logDir}/rainbow/rainbow_switch.log"
               filePattern="${logDir}/rainbow/rainbow_switch.log.%d{yyyy-MM-dd}">
               <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS}|%msg%n"/>
               <Policies>
                   <TimeBasedTriggeringPolicy/>
               </Policies>
  </RollingRandomAccessFile>
  <Logger name="com.huawei.rainbow" level="INFO"  additivity="false"
              includeLocation="true">
              <AppenderRef ref="rainbow_log" />
  </Logger>
  ```