[ http://jira.qos.ch/browse/LBCLASSIC-202?page=com.atlassian.jira.plugin.syste... ] Anthony DePalma commented on LBCLASSIC-202: ------------------------------------------- This would be an excellent feature - is there any chance of this being included with logback?
ServletContextListener to relocate logback config, implementation provided --------------------------------------------------------------------------
Key: LBCLASSIC-202 URL: http://jira.qos.ch/browse/LBCLASSIC-202 Project: logback-classic Issue Type: New Feature Affects Versions: 0.9.20 Reporter: Attila Király Assignee: Logback dev list Attachments: LogbackConfigListener.java
In spring there is a Log4jConfigListener which can be used to reconfigure the default location of the log4j config. I always liked to use it because so I could relocate my log4j.xml from the classes directory next to the web.xml so the config files were at one place. Because I did not find something like that I wrote one for logback. I think it could be included into logback-classic. ch.qos.logback.classic.servlet.LogbackConfigListener configuration is very easy: 1. Add the listener to the web.xml (it should be the first listener so logback gets configured before the other listeners start up): <listener> <listener-class>ch.qos.logback.classic.servlet.LogbackConfigListener</listener-class> </listener> 2. Add a context-param to web.xml to specify the location of the logback config: <context-param> <param-name>logbackConfigLocation</param-name> <param-value>/WEB-INF/log.xml</param-value> </context-param> And thats it. The location is resolved in the following way (similar to spring aproach): - if the location starts with "/" it is resolved as servlet context resource - otherwise an URL is constructed from it. So you can use locations like this also: file:/foo/bar/logback.xml or file:d:/foo/bar/logback.xml - if the the first method fails a java.io.FileInputStream is created from the location to be used as input for logback configuration. - If none of the above worked an error is logged to servlet log but no exception is thrown. The location can contain system properties, those gets resolved. So a location can be configured for example to: file:${user.home}/configuration/log.xml The original spring listener only worked with expanded wars this logback variant does not have this requirement.
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