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POJava Monitor logging file
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copied!<p>I'm developing a tool to monitor logging files of several application, those applications use either java.logging or Log4j.</p> <p>The appender is always a rolling file appender with the size of the file as trigger for the rolling. When a rolling happens for both ( java.logging and log4j ) all logging files are renamed to allow the current logging file to have the same name. </p> <p>My problem is if i'm currently reading the logging file i'm keeping it from being renamed and therefore it will be erase because the logger will not append on a file it should have just created. </p> <p>I tried to use a socketAppender to avoid reading on a file and directly gathering the data, but the action of logging takes at least 0,1ms (0,02 with a fileAppender) and as i have a granularity of 1ms for one of my application i can't use this.</p> <p>I obtained those result by changing the configuration of my loggers and using this code </p> <pre><code>long start=System.currentTimeMillis(); long numberOfLog=0; long total=1000000; while(numberOfLog<total){ log.info(" "+numberOfLog); numberOfLog++; } long duree=System.currentTimeMillis()-start; System.out.println("la durée est de "+duree+"ms pour "+total+" logs"); </code></pre> <p>Now i'm wondering is there any solution to read those logging file without interfering with the rename ? Or is there a solution to configure those tools ( log4j, java.logging ) to roll on a size trigger and whithout renaming the files (using date for the name or other solutions) ?</p> <p>Thank you for your feedback</p>

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