Re: Multiple appenders and verbose logging for specific classes for an appender
Hi Jake. Thank you for explaining this very well. My motivation for having two separate appenders that need to be tuned independently this way, is that I need one log file/appender for debugging/analyzing and one for monitoring. - The debugging log can in some periods be very verbose when doing debugging, and should be tuned without affecting the monitoring log - The monitoring log is being indexed by a monitoring system, and there are events/reports based on the monitoring log. Sometimes alarms/reports require more verbose logging for some classes. Achieving this shouldn't be so complicated, I think. I haven't had the chance to look much into log4j2 (in beta now) and to see if there is any simpler way of doing this (dynamic threshold might be one way to go). However, the underlying platform currently requires log4j 1.2.x. I think it uses slf4j facade, though, so maybe log4j2 would be possible. Thanks again, Fredrik On Wed, Oct 2, 2013 at 6:25 PM, Jacob Kjome h...@visi.com wrote: Apply appenderA and AppenderB to the root logger. I always set the root logger level to WARN to avoid trace/debug/info messages from arbitrary libraries. Then, if you want INFO logging for most of your library, configure the lowest common denominator package for your app, let's say com.myapp, for the INFO level. Now configure the ClassX and ClassY loggers for the DEBUG level. Now your requirements get complicated. You need to configure filters for both appenders so that: 1. AppenderB explicitly ignores anything but WARN+, except when logging for ClassY, in which case it should accept DEBUG+. 2. AppenderA accepts whatever is sent to it except when logging for ClassY, in which case it should only accept INFO+ You can roll your own filter by implementing the Filter interface [1] or you could try the extras [2] ExpressionFilter [3]. I'm not an expert on supported expressions, but you can search for examples, such as [4]. This is an awfully complicated setup. I hope this is just about theory and not the way you actually intend to use Log4j. Nevertheless, Log4j should be able to handle it. [1] http://logging.apache.org/**log4j/1.2/apidocs/org/apache/** log4j/spi/Filter.htmlhttp://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/spi/Filter.html [2] http://logging.apache.org/**log4j/companions/extras/index.**htmlhttp://logging.apache.org/log4j/companions/extras/index.html [3] http://svn.apache.org/repos/**asf/logging/site/trunk/docs/** log4j/companions/extras/**apidocs/org/apache/log4j/** filter/ExpressionFilter.htmlhttp://svn.apache.org/repos/asf/logging/site/trunk/docs/log4j/companions/extras/apidocs/org/apache/log4j/filter/ExpressionFilter.html [4] http://apache-logging.6191.n7.**nabble.com/Multiple-** expressions-define-in-one-**ExpressionFilter-td7229.htmlhttp://apache-logging.6191.n7.nabble.com/Multiple-expressions-define-in-one-ExpressionFilter-td7229.html Jake On Wed, 2 Oct 2013 11:16:42 +0200 fedinho fedi...@gmail.com wrote: Hi. No, I do not want to exclude the more severe logging levels, but I want to enable more verbose logging for specific classes for appender A independently of appender Bs logging of those same classes, and vice versa: Appender A and B is defined. Appender A is logging INFO+ for all by default, while appender B is logging WARN+ for all. Class X is logging DEBUG+more severe levels through appender A, but still logging WARN+more severe levels through appender B. Class Y is logging DEBUG+more severe levels through appender B, but still logging INFO+more severe levels through appender A. + means including more severe logging levels Thanks Fredrik On Wed, Oct 2, 2013 at 9:35 AM, Remko Popma remko.po...@gmail.com wrote: By default, if you set the level of a logger/appender to debug, it will process debug, info, warn, error and fatal messages. Is this what you want, or do you want to include only debug-level messages, and exclude info, warn, error and fatal messages? On Wednesday, October 2, 2013, fedinho wrote: Thanks for your response Jacob. I've been looking at the additive feature, but I'm not sure it solves my requirement. Given this configuration, I would like to debug class X on appender A, but still keep the info level messages from class X on appender B. I was hoping that this line would make this happen, but doesn't seem to work. log4j.logger.classX=debug, A Is there a simple example similar to my requirements somewhere? Thanks Fredrik On Tue, Oct 1, 2013 at 6:50 PM, Jacob Kjome h...@visi.com javascript:; wrote: On Tue, 1 Oct 2013 18:17:41 +0200 fedinho fedi...@gmail.com javascript:; wrote: Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A,
Re: Multiple appenders and verbose logging for specific classes for an appender
Thanks for your response Jacob. I've been looking at the additive feature, but I'm not sure it solves my requirement. Given this configuration, I would like to debug class X on appender A, but still keep the info level messages from class X on appender B. I was hoping that this line would make this happen, but doesn't seem to work. log4j.logger.classX=debug, A Is there a simple example similar to my requirements somewhere? Thanks Fredrik On Tue, Oct 1, 2013 at 6:50 PM, Jacob Kjome h...@visi.com wrote: On Tue, 1 Oct 2013 18:17:41 +0200 fedinho fedi...@gmail.com wrote: Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A, and debug messages from class Y to appender B. Thanks for any tips for a configuration that will work. Threshold is not the way to go. Is there a way A and B can have different root loggers or categories? This is usually done by setting the logger additivity to false for either the logger in question or one it inherits from, which essentially makes the logger with additivity=false the root logger for all inheritors. See... http://logging.apache.org/**log4j/1.2/manual.html#**Appenders_and_Layoutshttp://logging.apache.org/log4j/1.2/manual.html#Appenders_and_Layouts Kind regards Fredrik --**--**- To unsubscribe, e-mail: log4j-user-unsubscribe@**logging.apache.orglog4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-help@logging.**apache.orglog4j-user-h...@logging.apache.org
Re: Multiple appenders and verbose logging for specific classes for an appender
By default, if you set the level of a logger/appender to debug, it will process debug, info, warn, error and fatal messages. Is this what you want, or do you want to include only debug-level messages, and exclude info, warn, error and fatal messages? On Wednesday, October 2, 2013, fedinho wrote: Thanks for your response Jacob. I've been looking at the additive feature, but I'm not sure it solves my requirement. Given this configuration, I would like to debug class X on appender A, but still keep the info level messages from class X on appender B. I was hoping that this line would make this happen, but doesn't seem to work. log4j.logger.classX=debug, A Is there a simple example similar to my requirements somewhere? Thanks Fredrik On Tue, Oct 1, 2013 at 6:50 PM, Jacob Kjome h...@visi.com javascript:; wrote: On Tue, 1 Oct 2013 18:17:41 +0200 fedinho fedi...@gmail.com javascript:; wrote: Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A, and debug messages from class Y to appender B. Thanks for any tips for a configuration that will work. Threshold is not the way to go. Is there a way A and B can have different root loggers or categories? This is usually done by setting the logger additivity to false for either the logger in question or one it inherits from, which essentially makes the logger with additivity=false the root logger for all inheritors. See... http://logging.apache.org/**log4j/1.2/manual.html#**Appenders_and_Layouts http://logging.apache.org/log4j/1.2/manual.html#Appenders_and_Layouts Kind regards Fredrik --**--**- To unsubscribe, e-mail: log4j-user-unsubscribe@**logging.apache.org log4j-user-unsubscr...@logging.apache.org javascript:; For additional commands, e-mail: log4j-user-help@logging.**apache.org log4j-user-h...@logging.apache.org javascript:;
Re: Multiple appenders and verbose logging for specific classes for an appender
Hi. No, I do not want to exclude the more severe logging levels, but I want to enable more verbose logging for specific classes for appender A independently of appender Bs logging of those same classes, and vice versa: Appender A and B is defined. Appender A is logging INFO+ for all by default, while appender B is logging WARN+ for all. Class X is logging DEBUG+more severe levels through appender A, but still logging WARN+more severe levels through appender B. Class Y is logging DEBUG+more severe levels through appender B, but still logging INFO+more severe levels through appender A. + means including more severe logging levels Thanks Fredrik On Wed, Oct 2, 2013 at 9:35 AM, Remko Popma remko.po...@gmail.com wrote: By default, if you set the level of a logger/appender to debug, it will process debug, info, warn, error and fatal messages. Is this what you want, or do you want to include only debug-level messages, and exclude info, warn, error and fatal messages? On Wednesday, October 2, 2013, fedinho wrote: Thanks for your response Jacob. I've been looking at the additive feature, but I'm not sure it solves my requirement. Given this configuration, I would like to debug class X on appender A, but still keep the info level messages from class X on appender B. I was hoping that this line would make this happen, but doesn't seem to work. log4j.logger.classX=debug, A Is there a simple example similar to my requirements somewhere? Thanks Fredrik On Tue, Oct 1, 2013 at 6:50 PM, Jacob Kjome h...@visi.comjavascript:; wrote: On Tue, 1 Oct 2013 18:17:41 +0200 fedinho fedi...@gmail.com javascript:; wrote: Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A, and debug messages from class Y to appender B. Thanks for any tips for a configuration that will work. Threshold is not the way to go. Is there a way A and B can have different root loggers or categories? This is usually done by setting the logger additivity to false for either the logger in question or one it inherits from, which essentially makes the logger with additivity=false the root logger for all inheritors. See... http://logging.apache.org/**log4j/1.2/manual.html#**Appenders_and_Layouts http://logging.apache.org/log4j/1.2/manual.html#Appenders_and_Layouts Kind regards Fredrik --**--**- To unsubscribe, e-mail: log4j-user-unsubscribe@**logging.apache.org log4j-user-unsubscr...@logging.apache.org javascript:; For additional commands, e-mail: log4j-user-help@logging.**apache.org log4j-user-h...@logging.apache.org javascript:;
Re: Multiple appenders and verbose logging for specific classes for an appender
Apply appenderA and AppenderB to the root logger. I always set the root logger level to WARN to avoid trace/debug/info messages from arbitrary libraries. Then, if you want INFO logging for most of your library, configure the lowest common denominator package for your app, let's say com.myapp, for the INFO level. Now configure the ClassX and ClassY loggers for the DEBUG level. Now your requirements get complicated. You need to configure filters for both appenders so that: 1. AppenderB explicitly ignores anything but WARN+, except when logging for ClassY, in which case it should accept DEBUG+. 2. AppenderA accepts whatever is sent to it except when logging for ClassY, in which case it should only accept INFO+ You can roll your own filter by implementing the Filter interface [1] or you could try the extras [2] ExpressionFilter [3]. I'm not an expert on supported expressions, but you can search for examples, such as [4]. This is an awfully complicated setup. I hope this is just about theory and not the way you actually intend to use Log4j. Nevertheless, Log4j should be able to handle it. [1] http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/spi/Filter.html [2] http://logging.apache.org/log4j/companions/extras/index.html [3] http://svn.apache.org/repos/asf/logging/site/trunk/docs/log4j/companions/extras/apidocs/org/apache/log4j/filter/ExpressionFilter.html [4] http://apache-logging.6191.n7.nabble.com/Multiple-expressions-define-in-one-ExpressionFilter-td7229.html Jake On Wed, 2 Oct 2013 11:16:42 +0200 fedinho fedi...@gmail.com wrote: Hi. No, I do not want to exclude the more severe logging levels, but I want to enable more verbose logging for specific classes for appender A independently of appender Bs logging of those same classes, and vice versa: Appender A and B is defined. Appender A is logging INFO+ for all by default, while appender B is logging WARN+ for all. Class X is logging DEBUG+more severe levels through appender A, but still logging WARN+more severe levels through appender B. Class Y is logging DEBUG+more severe levels through appender B, but still logging INFO+more severe levels through appender A. + means including more severe logging levels Thanks Fredrik On Wed, Oct 2, 2013 at 9:35 AM, Remko Popma remko.po...@gmail.com wrote: By default, if you set the level of a logger/appender to debug, it will process debug, info, warn, error and fatal messages. Is this what you want, or do you want to include only debug-level messages, and exclude info, warn, error and fatal messages? On Wednesday, October 2, 2013, fedinho wrote: Thanks for your response Jacob. I've been looking at the additive feature, but I'm not sure it solves my requirement. Given this configuration, I would like to debug class X on appender A, but still keep the info level messages from class X on appender B. I was hoping that this line would make this happen, but doesn't seem to work. log4j.logger.classX=debug, A Is there a simple example similar to my requirements somewhere? Thanks Fredrik On Tue, Oct 1, 2013 at 6:50 PM, Jacob Kjome h...@visi.comjavascript:; wrote: On Tue, 1 Oct 2013 18:17:41 +0200 fedinho fedi...@gmail.com javascript:; wrote: Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A, and debug messages from class Y to appender B. Thanks for any tips for a configuration that will work. Threshold is not the way to go. Is there a way A and B can have different root loggers or categories? This is usually done by setting the logger additivity to false for either the logger in question or one it inherits from, which essentially makes the logger with additivity=false the root logger for all inheritors. See... http://logging.apache.org/**log4j/1.2/manual.html#**Appenders_and_Layouts http://logging.apache.org/log4j/1.2/manual.html#Appenders_and_Layouts Kind regards Fredrik --**--**- To unsubscribe, e-mail: log4j-user-unsubscribe@**logging.apache.org log4j-user-unsubscr...@logging.apache.org javascript:; For additional commands, e-mail: log4j-user-help@logging.**apache.org log4j-user-h...@logging.apache.org javascript:; - To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
Multiple appenders and verbose logging for specific classes for an appender
Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A, and debug messages from class Y to appender B. Thanks for any tips for a configuration that will work. Threshold is not the way to go. Is there a way A and B can have different root loggers or categories? Kind regards Fredrik
Re: Multiple appenders and verbose logging for specific classes for an appender
On Tue, 1 Oct 2013 18:17:41 +0200 fedinho fedi...@gmail.com wrote: Hi. A simple question I hope someone can help me with. This is using log4j 1.2.x I would like to log info level to one appender A and warn level to another appenderB. However, I would like to log debug messages from class X to appender A, and debug messages from class Y to appender B. Thanks for any tips for a configuration that will work. Threshold is not the way to go. Is there a way A and B can have different root loggers or categories? This is usually done by setting the logger additivity to false for either the logger in question or one it inherits from, which essentially makes the logger with additivity=false the root logger for all inheritors. See... http://logging.apache.org/log4j/1.2/manual.html#Appenders_and_Layouts Kind regards Fredrik - To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
