Java Language
- Getting started with Java Language
- Top 10 Java Errors with Solutions
- Awesome Book
- Awesome Community
- Awesome Course
- Awesome Tutorial
- Awesome YouTube
- 2D Graphics in Java
- Alternative Collections
- Annotations
- Apache Commons Lang
- AppDynamics and TIBCO BusinessWorks Instrumentation for Easy Integration
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- Asserting
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- Class - Java Reflection
- Classes and Objects
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- Java Pitfalls - Exception usage
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- Java Pitfalls - Nulls and NullPointerException
- Java Pitfalls - Performance Issues
- Java Pitfalls - Threads and Concurrency
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- log4j / log4j2
- Basic log4j2.xml configuration file
- Filter Logoutput by level (log4j 1.x)
- How to get Log4j
- How to use Log4j in Java code
- Migrating from log4j 1.x to 2.x
- Properties-File to log to DB
- Setting up property file
- Logging (java.util.logging)
- Maps
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- The Classpath
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- The java.util.Objects Class
- ThreadLocal
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- Type Conversion
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- Using the static keyword
- Using ThreadPoolExecutor in MultiThreaded applications.
- Varargs (Variable Argument)
- Visibility (controlling access to members of a class)
- WeakHashMap
- XJC
- XML Parsing using the JAXP APIs
- XML XPath Evaluation
- XOM - XML Object Model
Java Language log4j / log4j2 Basic log4j2.xml configuration file
Example
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C{2} %m%n"/>
</Console>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="STDOUT"/>
</Root>
</Loggers>
</Configuration>
This is a basic log4j2.xml configuration which has a console appender and a root logger. The pattern layout specifies which pattern should be used for logging the statements.
In order to debug the loading of log4j2.xml you can add the attribute status = <WARN | DEBUG | ERROR | FATAL | TRACE | INFO> in the configuration tag of your log4j2.xml.
You can also add a monitor interval so that it loads the configuration again after the specified interval period. The monitor interval can be added to the configuration tag as follows: monitorInterval = 30. It means that the config will be loaded every 30 seconds.
