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Logging with Log4j
Log4j is the industry-standard freeware logging tool for Java.
In our project we used Log4j 1.2.17
| Log Level | Description |
|---|---|
| FATAL | Designates very severe error events that will presumably lead the application to abort. |
| ERROR | Designates error events that might still allow the application to continue running. Usually will be logged in a catch block. |
| INFO | Designates informational messages that highlight the progress of the application at coarse-grained level. |
| WARN | Designates potentially harmful situations. |
| DEBUG | Designates fine-grained informational events that are most useful to debug an application. |
| TRACE | Designates finer-grained informational events than the DEBUG. |
Log4j will search for the configuration file in the classpath. It is recommended to place it in the resources folder.
If located in a different directory, add the following VM argument:
-Dlog4j.configuration=/path/to/file
Add the following dependency to pom.xml file:
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependencies>
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