As stated in tutorialspoint : SLF4J stands for Simple Logging Facade for Java. It provides a simple abstraction of all the logging frameworks. It enables a user to work with any of the logging frameworks such as Log4j, Logback, JUL (java.util.logging), etc. using single dependency. This means that you have to provide a concrete java … Read more
The javadocs for NoSuchMethodError say, Normally, this error is caught by the compiler; this error can only occur at run time if the definition of a class has incompatibly changed. So this is probably being caused by incompatible versions of slf4j being loaded. Rather than looking at your classpath and guessing where classes are loaded, … Read more
Why do you think it does not log DEBUG messages? If you mean that your log.debug(String) logging calls do not end up in java.util.logging log files, then I guess you have to configure the logging.properties configuration file to allow log messages at FINE level. If you do not want to mess with the global %JRE_HOME%/lib/logging.properties, … Read more
My question was answered on the Jetty mailing list by Joakim Erdfelt: You are looking at the old Jetty 6.x docs at docs.codehaus.org. DEBUG logging is just a logging level determined by the logging implementation you choose to use. If you use slf4j, then use slf4j’s docs for configuring logging level. http://slf4j.org/manual.html If you use … Read more
You can use the BeanPostProcessor interface, which is called by the ApplicationContext for all created beans, so you have the chance to fill the appropriate properties. I created a simple implementation, which does that: import java.lang.reflect.Field; import java.util.List; import net.vidageek.mirror.dsl.Mirror; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.BeansException; import org.springframework.beans.factory.config.BeanPostProcessor; import org.springframework.stereotype.Component; @Component public class LoggerPostProcessor implements … Read more
Generally your own code is at the beginning of the classpath. Because of this, one way to do it is to create your own org.slf4j.impl.StaticLoggerBinder class: package org.slf4j.impl; import org.slf4j.ILoggerFactory; import org.slf4j.spi.LoggerFactoryBinder; /** * Force tests to use JDK14 for logging. */ @SuppressWarnings(“UnusedDeclaration”) public class StaticLoggerBinder implements LoggerFactoryBinder { private static final StaticLoggerBinder SINGLETON = … Read more
It’s very easy and not a performance issue anymore. There are two ways documented in the SLF4J manual. There are also precise examples in the Javadocs Add jul-to-slf4j.jar to your classpath. Or through maven dependency: <dependency> <groupId>org.slf4j</groupId> <artifactId>jul-to-slf4j</artifactId> <version>1.7.0</version> </dependency> If you don’t have logging.properties (for java.util.logging), add this to your bootstrap code: SLF4JBridgeHandler.removeHandlersForRootLogger(); SLF4JBridgeHandler.install(); … Read more
Late entry! As I am likely to be searching for this in the future. There is a way to create copy/paste friendly Logger instances (granted this is almost never a good reason to do something!) by using Java 7’s MethodHandles class. private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
There is, but it is a little bit obscure. Quoting Fixing liquibase logging with SLF4J and Log4J: There’s The Easy Way, by dropping in a dependency: <!– your own standard logging dependencies –> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId><!– or log4j2 or logback or whatever–> <version>1.7.5</version> </dependency> <!– special dependency to fix liquibase’s … Read more
excludeDependencies += “org.slf4j” % “slf4j-jdk14”