[logback-user] Fwd: Time based rolling on Android

Jonas Schmid jonas.schmid at gmail.com
Mon May 13 16:52:14 CEST 2013


I finally got time to try it out.
You were right, I forgot the full path in fileNamePattern.
It works now.
Thanks!

Jonas


On Fri, May 3, 2013 at 7:56 AM, Tony Trinh <tony19 at gmail.com> wrote:

> Hi Jonas,
>
> In your logback.xml, the <fileNamePattern> should specify an absolute
> path where your application has write permissions, or else it will assume
> the root directory is the parent directory of the destination file (which
> is unlikely to be writeable). If you want the rollover files to be in the
> same directory as your active log file, prefix the <fileNamePattern> with
> the same leading path you gave in <file>.
>
> In the following example (based on your original logback.xml), the log
> rolls every second in the same directory as the active file. I successfully
> tested this with an Android app that logged a message every 400ms.
>
> <appender name="filelog"
> class="ch.qos.logback.core.rolling.RollingFileAppender">
>  <file>*${LOG_DIR}/*log.log</file>
> <encoder>
>  <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} -
> %msg%n</pattern>
> </encoder>
>
> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
>  <!-- daily rollover -->
> <fileNamePattern>*${**LOG_DIR}/*log.%d{HH-mm-ss}.log</fileNamePattern>
>  <!-- keep 30 days' worth of history -->
> <maxHistory>30</maxHistory>
>  <cleanHistoryOnStart>true</cleanHistoryOnStart>
> </rollingPolicy>
>  </appender>
>
> For future reference, you can troubleshoot rollover issues by turning on
> debugging with the "debug" attribute for <configuration>:
>
>     <configuration debug="true">
>        ...
>     </configuration>
>
> OR run this command from an Android terminal (e.g., via adb shell), and
> restart your app:
>
>     $ setprop logback.debug true
>
> When debugging is enabled, the rollover is verbose, as seen in logcat
> (this is the output with your original logback.xml):
>
> 05-03 05:25:43.428: I/com.example.MainActivity(1567): hello world
> 05-03 05:25:43.830: I/com.example.MainActivity(1567): hello world
> 05-03 05:25:44.226: I/com.example.MainActivity(1567): hello world
> 05-03 05:25:44.236: I/System.out(1567): 05:25:44,235 |-INFO in
> c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Elapsed
> period: Fri May 03 05:25:43 GMT 2013
> 05-03 05:25:44.246: I/System.out(1567): 05:25:44,243 |-INFO in
> c.q.l.co.rolling.helper.RenameUtil - Renaming file
> [/sdcard/logback/log.log] to [log.05-25-43.log]
> 05-03 05:25:44.246: I/System.out(1567): 05:25:44,251 |-WARN in
> c.q.l.co.rolling.helper.RenameUtil - Failed to rename file
> [/sdcard/logback/log.log] to [log.05-25-43.log].
> 05-03 05:25:44.266: I/System.out(1567): 05:25:44,259 |-WARN in
> c.q.l.co.rolling.helper.RenameUtil - Please consider leaving the [file]
> option of RollingFileAppender empty.
> 05-03 05:25:44.266: I/System.out(1567): 05:25:44,267 |-WARN in
> c.q.l.co.rolling.helper.RenameUtil - See also
> http://logback.qos.ch/codes.html#renamingError
>
>
> Hope that helps,
> Tony
>
>
>
> On Thu, May 2, 2013 at 1:04 AM, Jonas Schmid <jonas.schmid at gmail.com>wrote:
>
>> Hi there,
>>
>> I am trying to use the time based rolling configuration for my android
>> app.
>>
>> I got my configuration from the doc (
>> http://logback.qos.ch/manual/appenders.html#TimeBasedRollingPolicy) but
>> it does not seem to work on my app.
>>
>> Please find enclosed my config file.
>>
>> The file does not roll and everything goes to log.log.
>>
>> To try it out I changed the date on my phone. I took care of killing the
>> app before doing so.
>> I also set the time to 23h59 then launched my app and waited, but it did
>> not work either.
>>
>> What did I do wrong?
>> Thanks
>>
>> Jonas
>>
>>
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>>
>
>
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