On Thu, Jun 27, 2013 at 12:55 AM, Jagmohan Singh <[email protected]
> wrote:
>
> I have used
> logback-android-1.0.10-2.jar
> slf4j-api-1.7.5.jar
>
> Is it one of the stable versions that I am using? If not, is it possible
> for you to suggest the stable version?
>
>
Yes, logback-android-1.0.10-2.jar is the latest stable release.
> Also, if everything is fine, I would like to know how can I configure a
> Rolling file appender with rolling time of 4 hours? Is it possible?
>
>
Not out of the box. Currently, the TimeBasedRollingPolicy[1] rolls over
files at the beginning of a time period (rather than at specific
multiples). There might be an easier (or more correct) way to accomplish
your goal, but I suggest overriding the period computation within the
triggering policy of TimeBasedRollingPolicy.
Here's some *untested* code (at the moment, I don't have my development
environment handy to verify any of this).
Make this triggering-policy class available on your classpath (e.g., by
compiling it into a JAR, and then putting the JAR in your libs directory at
the root of your apk):
package com.example;
public class MyTimeBasedTriggeringPolicy<E> extends
DefaultTimeBasedFileNamingAndTriggeringPolicy<E> {
private int multiple = 1;
public void setTimeMultiple(int multiple) {
this.multiple = multiple;
}
@Override
protected void computeNextCheck() {
super.computeNextCheck();
nextCheck *= multiple;
}
}
Then, in your logback.xml:
<configuration>
<appender name="FILE"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>logFile.log</file>
<rollingPolicy
class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!-- hourly rollover -->
<fileNamePattern>logFile.%d{yyyy-MM-dd_HH}.log</fileNamePattern>
<!-- make that every 4 hours -->
<timeBasedFileNamingAndTriggeringPolicy
class="com.example.MyTimeBasedTriggeringPolicy">
<timeMultiple>4</timeMultiple>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>%-4relative [%thread] %-5level %logger{35} - %msg%n</pattern>
</encoder>
</appender>
<root level="DEBUG">
<appender-ref ref="FILE" />
</root>
</configuration>
[1] http://logback.qos.ch/manual/appenders.html#TimeBasedRollingPolicy
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