log4j2

logger.setLevel() method is not available in log4j2 API. So how to set log level at run time. I'm not sure if this is the best way, but you set the level on org.apache.logging.log4j.core.config.LoggerConfig which you can get from the LoggerContext via the LogManager. Once set, you can update the loggers with the new configuration. As an example: public static void main(String[] args) { Logger log = LogManager.getLogger(LogManager.ROOT_LOGGER_NAME); log.error("An error"); log.debug("A debug"); LoggerContext ctx = (LoggerContext) LogManager.getContext(false); Configuration conf = ctx

We have migrated all our code to use the slf4 API to use generic APIs, however now we are thinking of upgrading from log4j 1.x to log4j 2.x. Will we be able to use all the features of log4j2 if we use the slf4j API and log4j2 as the implementation? Remko Popma The Log4j2 API is richer than the SLF4J API, and many Log4j2 API features are not accessible via SLF4J. See below for details. Features of the Log4j2 implementation, like Async Loggers, Lookups, Filters, Layouts and Appenders are controlled with configuration and are available regardless of the logging API you use in your application.

Hi I just downloaded and configured log4j-2. I am stuck on applying color codes to the SlowConsole console appender. My console appender is like below. <?xml version="1.0" encoding="UTF-8"?> <Configuration status="WARN"> <Appenders> <Console name="Console" target="SYSTEM_OUT"> <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %logger{36} - %msg%n"/> </Console> <Console name="SlowConsole" target="SYSTEM_OUT"> <PatternLayout pattern="%highlight{%d{HH:mm:ss.SSS} %-5level %logger{36}.%M() @%L - %msg%n}{FATAL=red, ERROR=red, WARN=yellow, INFO=black, DEBUG=green, TRACE=blue}"/> </Console> <File name

I am trying to create a custom pattern converter for log4j 2.0, but am having issues getting my log4j configuration to recognize the pattern. Here is the custom converter: package com.test.log4j.plugins; import org.apache.logging.log4j.Marker; import org.apache.logging.log4j.core.LogEvent; import org.apache.logging.log4j.core.config.plugins.Plugin; import org.apache.logging.log4j.core.pattern.ConverterKeys; import org.apache.logging.log4j.core.pattern.LogEventPatternConverter; @Plugin(name="MarkerNamePatternConverter", category="Converter") @ConverterKeys({"markername"}) public class

I'm trying to use an XML configuration file for Log4j2 that is embedded in my Java application, but is not working. The code: ConfigurationSource source = new ConfigurationSource(Main.class.getResourceAsStream("/in/gunbound/prelauncher/server/log4j2/log4j2.xml")); ConfigurationFactory factory = (ConfigurationFactory) XMLConfigurationFactory.getInstance().getConfiguration(source); ConfigurationFactory.setConfigurationFactory(factory); The error: Exception in thread "main" java.lang.ClassCastException: org.apache.logging.log4j.core.config.XMLConfiguration cannot be cast to org.apache.logging

I am running an example using log4j 2.0-rc1 and log4j.properties file, but log4j lib always runs it with the default configuration (log level, appender, etc). I also tried changing the name to log4j2.properties and nothing happened. Log4j 2 doesn't support the Log4j v1 ".properties" format anymore (yet, since v2.4, Log4j supports a Property format, but its syntax is totally different from v1 format ). New formats are XML, JSON, and YAML, see the documentation (note: if you used one of these formats in a file called ".properties", it may be confusing). To specify the location of your

I am trying to configure tomcat 7 internal logging with log4j2 . I have followed the answer provided at Logging server classes in Tomcat 6 with log4j2 . I am using tomcat 7.0.54, and log4j-core-2.1.jar , log4j-api-2.1.jar . I have down loaded the extras and did all the steps below, but when I start tomcat, I get an error: ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. These are the steps I performed: put log4j2.xml in $CATALINA_BASE/lib download tomcat-juli.jar and tomcat-juli-adapters.jar from "extras" put log4j-api-2.1

Is there any way to specify Log4J 2.x log4j2.xml file location manually (like DOMConfigurator in Log4J 1.x), without messing with classpath and system properties? You could use the static method #initialize(String contextName, ClassLoader loader, String configLocation) (see source here ) in org.apache.logging.log4j.core.config.Configurator . (You can pass null for the class loader.) Be aware that this class is not part of the public API so your code may break with any minor release . For completeness, you can also specify the location of the configuration file with this system property:

What filter should i use, to define particular level to be logged with apender? For example: java: LOGGER.debug("Debug message"); LOGGER.info("Info message"); LOGGER.warn("Warn message"); LOGGER.error("Error message"); LOGGER.fatal("Fatal message"); log4j2.xml: <Configuration> <Appenders> <Console name="info-stdout-message"> <PatternLayout pattern="[%logger{36}] %message %n" /> <ThresholdFilter level="info"/> </Console> <Console name="detailed-stdout-message"> <PatternLayout pattern="[%logger{36}] [%level] %message %n" /> </Console> <File name="file-appender" fileName="logs/debug.log">