logback 的出现让我们处理日志又简单了许多,也非常灵活,如:按照制订的日志生成规则输出不同的日志到不同的文件及数据库,这对于日后的数据挖掘容易了许多;
不过,对于中小型项目而言,真的没必要纠结日志这块的性能,但对于高并发应用就要对日志花些心思进去,不能掉以轻心了,并发应用众多瓶颈之中,日志是其中的一个。
基于logback构建一个高性能的、灵活、方便的适用于高并发应用的异步日志系统也是非常的方便和快速。
先放一个比较实用的一个配置吧,他非常简单,就几行配置内容(logback-1.0.6):
<configuration scan="true" scanPeriod="1 minutes"> <property name="app.logdir" value="out/log"></property> <property name="log.error.dir" value="error"></property> <property name="log.basic.dir" value="basic"></property> <property name="app.name" value="ccb"></property> <property name="error.log.name" value="${app.name}.error"></property> <property name="basic.log.name" value="${app.name}.basic"></property> <property name="ConsoleLogPattern" value="[%d{yyyy-MM-dd HH:mm:ss.SSS}][%logger][%level] %msg%n" /> <property name="FileLogPattern" value="[%d{yyyy-MM-dd HH:mm:ss.SSS}][thread:%thread][%level] %msg%n" /> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <filter class="ch.qos.logback.classic.filter.ThresholdFilter"> <level>DEBUG</level> </filter> <encoder> <pattern>${ConsoleLogPattern}</pattern> </encoder> </appender> <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${app.logdir}/${log.error.dir}/${error.log.name}.log</file> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>ERROR</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${app.logdir}/${error.log.name}.%d{yyyy-MM-dd}.log.gz</fileNamePattern> <maxHistory>90</maxHistory> </rollingPolicy> <encoder> <pattern>${FileLogPattern}</pattern> </encoder> </appender> <appender name="BASIC_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${app.logdir}/${log.basic.dir}/${basic.log.name}.log</file> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>ERROR</level> <onMatch>DENY</onMatch> <onMismatch>ACCEPT</onMismatch> </filter> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${app.logdir}/${basic.log.name}.%d{yyyy-MM-dd}.log.gz</fileNamePattern> <maxHistory>90</maxHistory> </rollingPolicy> <encoder> <pattern>${FileLogPattern}</pattern> </encoder> </appender> <!-- ALL < TRACE < DEBUG < INFO < WARN < ERROR < OFF --> <!-- logger --> <logger name="com.ccb" level="ERROR" additivity="false"> <appender-ref ref="ERROR_FILE" /> </logger> <logger name="com.ccb" level="DEBUG" additivity="false"> <appender-ref ref="BASIC_FILE" /> </logger> <!-- <logger name="com.ccb" level="DEBUG" additivity="false"> <appender-ref ref="CONSOLE" /> </logger> --> </configuration>