Manage Fluid Topics logs - Fluid Topics - 4.2

Fluid Topics' logs are managed through the logback standard (SLF4J).

The installation package includes a default log configuration file at the following location:

/usr/local/afs7/Fluid-Topics/web/conf/logging/prod-logger.xml

The package management system deploys the file during installation.

The file contains the following content:

<configuration>
    <!-- http://logback.qos.ch/manual/appenders.html#FileAppender -->
    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>/usr/local/afs7/logs/daemon/fluidtopics.log</file>
        <append>true</append>
        <encoder>
            <pattern>%date - %X{FT_APPLICATION_NAME} [%level] %logger - %message %xException{10}\n</pattern>
        </encoder>
    </appender>

    <!-- http://logback.qos.ch/manual/configuration.html#rootElement -->
    <root level="ERROR">
        <appender-ref ref="FILE"/>
    </root>

    <!-- http://logback.qos.ch/manual/configuration.html#loggerElement -->
    <logger name="akka" level="WARN"/>
    <logger name="net.antidot" level="WARN"/>
</configuration>

The prod-logger.xml configuration file is divided in the three following parts:

• Appender: defines the different ways to log messages: what is done with logs, where they are written, where they can be found, if there are sent by email, and so on.

• Root: defines the default value for all loggers.

• Logger: defines elements that send information written into log files. Each logger can be configured to modify the level of logs that can be consulted. In Fluid Topics:

  • net.antidot: is the main logger of the whole Fluid Topics solution.

  • akka: is the logger for the web server used in Fluid Topics.