- logback-user - mailman3.qos.ch

Dumping a CyclicBuffer
by mweeda 15 Oct '08

15 Oct '08

Hi, Objective: Dump a "history" of recent program operations to a log file when an Exception arises. By logging to a CyclicBufferAppender, a recent history at a fairly granular level (INFO, or possibly DEBUG) can be maintained without accumulating massive amounts of data, and with a minimum of overhead. Setting this up to log to the Cyclical Buffer went well. To get the data out of the CyclicBuffer and log it to a file, a reference to the CyclicBufferAppender object is needed, and it is not clear how to get one. It seems like log.getAppender(String name) should return an Appender, but it doesn't. How can I obtain such a reference? Also, once a reference is obtained, and an Object is returned from cyclicBufferAppender.get(i), what class will that object be? I'm hoping it is a LoggingEvent object, in which case a simple call to the fileAppender.doAppend method with the event as a parameter will log the event to a "permanent" log. Again, the code will need to obtain a reference to the appropriate FileAppender to log it to. (Appropriate might be hardcoded, or specified in a properties file.) Most of the configuration is being done in logback.xml. (File is attached.) Program code, other than wanting to dump the MEMORY appender, is limited to: static final Logger log = LoggerFactory.getLogger(Main.class); and various log.X method calls. As an aside, it would be even better to loop over all Appenders, and check to see which ones are CyclicBufferAppenders. The code would dump then contents of all of the CyclicBufferAppenders, or selected ones based on some user options. Thanks in advance for your insight. Mike

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Logback eclipse plugin enhancments
by Алексей Кузнецов 14 Oct '08

14 Oct '08

Hello! I'm playing with logback and its eclipse plugin (ch.qos.logback.eclipse_1.1.0.zip) and for me it miss 2 features: 1) In "Logback View Filters" window it would be more user frendly to use comboboxes for slecting "Action on match" and "Action on mismatch" instead of text fields. 2) In "Logback View Filters" window it would be really useful to add column "Active"(or "Use" or smth. like that) in table with expressions to activate/deactivate some filters without deleting them. Alexey Kuznetsov kuaw26(a)mail.ru

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Re: [logback-user] TimeBasedRollingPolicy
by Gam 14 Oct '08

14 Oct '08

On 12 Oct 2008, at 21:40, logback-user-request(a)qos.ch wrote: > thanx for your response. my test-application ran under a minute. > and now it's clear to me that every time > i restart the application the logging-configuration starts from > scratch. therefore i never had a rollover. > I introduced a sleep to make my app run longer than a minute; and > it works. thanks for your help. I discovered the same. I've been using log4j for years and it behaves differently than logback in this context, it will roll the log according to the configuration regardless of the execution context, which is imho a better behavior. I hope it would be possible to fix this issue or at least give an option between the two behaviors. Here is how I use it: - I have a monitoring task that is run every ten minutes and lasts for a dozen of seconds. I set logback to roll the logs everyday but it never happens because logback rolls ONLY if it is running while the date changes. I end up with a very huge log file that never rolls. Log4j will roll it during the first new execution after the date has changed. What do you think? Best Regards, Gam.

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Hostname in SMTPAppender subject
by Mayes, Christopher 30 Sep '08

30 Sep '08

Hi, there. Is there a way to get the reporting machine's hostname into the subject of the SMTPAppender's email address? According to a blog post, (http://blog.spiralarm.com/richard/2007/10/watching-production-logs.html) you can do something like this for log4j: <param name="Subject" value="[SMTPAppender] ${user.name}@${hostname} error message" /> Is there a Logback equivalent? Thanks, -Chris

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Using two separate logback configurations in same app
by Silvano Maffeis 26 Sep '08

26 Sep '08

Hi, My application holds an already initialized slf4j/logback environment. Now at some point in my code I would like to create a logback Logger using a completely different configuration, without inheriting any configuration settings from the logback environment already defined in my app (which was done via logback.xml on the classpath), and also without interfering with the previously created loggers either. I thought the most natural way would be to create my LoggerFactory instance, configure it, and then to create a Logger from there. But that seems not the way how its done in logback. Is what I want possible at all? If yes, how? Thanks! Silvano

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Number of logs
by Greg Flex 25 Sep '08

25 Sep '08

Hi all, I'm running some benchmarking and I've noticed that when calling logger.xxx in a loop (10,000 iterations) only about 3964 are written. I'm testing this with both MySQL and HSQLDB databases. Can someone please let me know what's seems to be a problem? Do I need to configure this in some config file? How many times I can write at once to a database? Thanks

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Logback socket command
by Greg Flex 23 Sep '08

23 Sep '08

Hi All I'm having some problems running a logback socket command... Here it is: java ch.qos.logback.classic.net.SimpleSocketServer 6000 \ src/main/java/chapter4/socket/server1.xml I'm in the logback-examples/ folder but still I can't get it to work. I'm getting an exception: Caused by: java.lang.ClassNotFoundException: ch.qos.logback.classic.net.SimpleSocketServer at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Meth at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Sour at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) I'm just following the tutorial.......What am I doing wrong? Thanks for help

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JmxConfigurator not being exposed in Weblogic
by Michael Sell 20 Sep '08

20 Sep '08

Has anyone confirmed that the JmxConfigurator is working as-is under Weblogic 9 or 10? I recently moved our application over to using Logback, and the logging is working wonderfully. However, adding the <jmxConfigurator /> tag to my logback.xml doesn't seem to be working. All of the other MBeans that my application exposes are there, but logbacks bean never gets exposed. I have the logback debugging on, but there isn't even any output about the jmx, just the output I always had about adding the appenders and such. Can I get some suggestions on what I am doing wrong, or how I can go about getting logback to tell me what is going wrong with exposing the MBean? Thanks for the help, and cheers on the great product. -Michael

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RollingFileAppender that splits logs into files/directories by logger name
by Eric Faden 18 Sep '08

18 Sep '08

I am building a RollingFileAppender to split the logs into directories/files based on the logger name. The goal is to have a single Appender "A" that takes in a bunch of loggers and spits the logs out into separate RollingFileAppenders based on the logger name. Basically my plan is to have an Appender that contains a HashMap of LoggerName (String) to RollingFileAppender. When I see a name for the first time I create a RollingFileAppender for it and place it into the HashSet. My problem is that there is going to be a single RollingPolicy/Triggering Policy for "A" which needs to get duplicated to the subappenders. The issue with this is that I can't use the same object since i need to modify the filepattern to have the correct file names on it. The problem with that is that the object isn't cloneable. Can anyone think of a good way to handle this? Or am I going about this all wrong? -Eric

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timstmp
by Greg Flex 17 Sep '08

17 Sep '08

How do I convert the timestmp stored in MySQL DB. In the database it looks: 1221685679781 but when I convert this with PHP and print it, I get: 06/09/2030 : 16:28:37:000000 What's seems to be a problem? Where the 2030 year comes from? Any Ideas how to convert this properly? Thanks Gregg.

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