CODEWITHSUNDEEP
javaloggingslf4jlogback
Guy Wald
Guy Wald

Reputation: 599

Logback programmatically set to log to a gzip file

I'm using Logback and I want to log some strings to a log file and let it gzip the file when I'm done.

I was following the example of:

Programmatically configure LogBack appender

But haven't figured out how to, when I finish logging, tell it to gzip the file. All the examples show to use fileNamePattern. The examples I've seen show to to define this in logback.xml, but I'm trying to do this by code.

Would appreciate some pointers / examples for this :)

Upvotes: 3

Views: 5853

Answers (1)

Dimitri Dewaele
Dimitri Dewaele

Reputation: 10689

<!-- Time and Size based: Roll every day and split big file in smaller peaces -->
<appender name="ROOT" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOG_HOME}/root.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <fileNamePattern>${LOG_HOME}/root-%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern>
        <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
            <maxFileSize>10MB</maxFileSize>
        </timeBasedFileNamingAndTriggeringPolicy>
        <maxHistory>10</maxHistory>
    </rollingPolicy>
    <encoder>
        <pattern>%date %-5level [%thread] - %mdc{loginName} - [%logger]- %msg%n</pattern>
    </encoder>
</appender>

Notice the ".gz": this indicates that the logfile will be compressed. Replace this with .zip to use a zip-file.

There are some limitations, but is basically the easiest flow. The docs state.

Just like FixedWindowRollingPolicy, TimeBasedRollingPolicy supports automatic file compression. This feature is enabled if the value of the fileNamePattern option ends with .gz or .zip.

Upvotes: 4

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