Question

我有一个用Java实现的Play服务器（Play框架2.3）。我想在文件中保留API调用的日志，限制文件的最大数量和每个文件的最大大小。我有以下application-logger.xml文件

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>/home/ajay/projects/application.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <!-- Daily rollover with compression -->
        <fileNamePattern>application-log-%d{yyyy-MM-dd}.gz</fileNamePattern>
        <!-- keep 30 days worth of history -->
        <maxHistory>30</maxHistory>
    </rollingPolicy>
    <encoder>
        <pattern>%date{yyyy-MM-dd HH:mm:ss ZZZZ} - [%level] - from %logger in %thread %n%message%n%xException%n</pattern>
    </encoder>
</appender>

<appender name="ACCESS_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>/home/ajay/projects/access.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <!-- daily rollover with compression -->
        <fileNamePattern>access-log-%d{yyyy-MM-dd}.gz</fileNamePattern>
        <!-- keep 1 week worth of history -->
        <maxHistory>7</maxHistory>
    </rollingPolicy>
    <encoder>
        <pattern>%date{yyyy-MM-dd HH:mm:ss ZZZZ} %message%n</pattern>
        <!-- this quadruples logging throughput -->
        <immediateFlush>false</immediateFlush>
    </encoder>
</appender>

<!-- additivity=false ensures access log data only goes to the access log -->
<logger name="access" level="INFO" additivity="false">
    <appender-ref ref="ACCESS_FILE" />
</logger>

<root level="INFO">
    <appender-ref ref="FILE"/>
</root>

我从here获取的。 我不完全了解上述配置。我使用以下行登录access.log文件

import play.Logger;

// log in the access.log file
final Logger.ALogger accessLogger = Logger.of("access");
accessLogger.info("Logging api call from the client");

然而，它不起作用。所有日志记录都转到access.log文件时，application.log文件为空。我在application.conf中注释掉了所有记录器设置。当我查看文件Logger.class时，我发现了这一行

private static final ALogger logger = of("application");

这是它无法正常工作的原因吗？请建议我如何解决它。

Answer 1

试试这个appender：

 <appender name="CUSTOM" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${application.home}/logs/agent.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${application.home}/logs/old/myLog-%d{yyyy-MM-dd}.log.%i</fileNamePattern>
            <maxHistory>30</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>100MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>%date %M  %logger{0} %message%n</pattern>
        </encoder>
    </appender>

在文件名模式中放置应用程序主路径。

Answer 2

您的appender的

immediateFlush属性设置为false，因此您不会立即在access.log文件中看到任何更改。只需删除

<immediateFlush>false</immediateFlush>

从您的配置xml开始。

From the logback documentation:立即刷新输出流可确保将日志记录事件立即写入磁盘，并且在应用程序退出而未正确关闭appender的情况下不会丢失。

如何在Play框架中的文件中记录数据？

2 个答案: