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I have been giving the new Log4j2 a go. It seems, from the documentation on migration, that the XML Schema/DTD specification has been done away with.
That seems like a step backwards. Surely it should be possible to associate either an XML Schema or a DTD with my log4j2.xml to assist writing it and for validation. I haven't been able to find anything useful in the documentation, and neither have I found the XML Schema or DTD itself.
So: In Log4j2, how should I associate an XML Schema with log4j2.xml?
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Log4j2 with XML configuration provides a simple way of setting up logging in your Java application. Apache Log4j2 is the new version of the log4j and is used for printing logs when used in a Java program. In this tutorial we will setup a Maven project and use log4j2 to print logs from a simple Java class.
Log4j will scan all classpath locations to find out this file and then load it. We can find this file mostly placed in the ‘ src/main/resources ‘ folder. If we are using an external log4j2 configuration file, then we can provide the path of the configuration file using the application startup parameter or system property log4j.configurationFile.
Apache Log4j2 is the new version of the log4j and is used for printing logs when used in a Java program. In this tutorial we will setup a Maven project and use log4j2 to print logs from a simple Java class. If you are using Eclipse IDE, click on File > New > Project > Maven Project (You must have Maven Plugin installed in Eclipse for this)
%-5level: Prints the level of the log message in a right-aligned fashion. But there exists many more variables and formatting in the PatternLayout. You can refer them to the Log4J 2 ‘s official documentation. Now we'll include the defined console appender into our main configuration:
Works for me with eclipse:
<Configuration strict="true" xmlns="http://logging.apache.org/log4j/2.0/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://logging.apache.org/log4j/2.0/config https://raw.githubusercontent.com/apache/logging-log4j2/master/log4j-core/src/main/resources/Log4j-config.xsd"> or against tagged version:
<Configuration strict="true" xmlns="http://logging.apache.org/log4j/2.0/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://logging.apache.org/log4j/2.0/config https://raw.githubusercontent.com/apache/logging-log4j2/log4j-2.8.2/log4j-core/src/main/resources/Log4j-config.xsd"> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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