Notice in the above class, we have just put annotation on the class level and log variable is available for creating log statements. SLF4J LOG4J 12 Binding Relocated 16,921 usages org. The below class shows how to create log statements which will be printed in the console as well as into the file. API for SLF4J (The Simple Logging Facade for Java) which serves as a simple facade or abstraction for various logging frameworks, allowing the end user to plug in the desired logging framework at deployment time. The root level of logging is info for file as well as console logging.Īvoid duplicate logging by adding aditivity=”false”. Next we define some loggers with level of logging. The console appender prints the log statements into console. During start up the file name pattern comes into picture and maximum 5 files will be created apart from main log file. The logger name is always log and the field’s type depends on which logger you have selected. These annotations let Lombok generate a logger field in the runtime. Next we have specified policy to start a new log file whenever the application starts up. Log, Log4j2 and Slf4j Annotations Lombok supports the following annotations for logging statements in a spring boot application. We have specified the pattern of the log statements. The file name pattern will create main.1.log … main.5.log and another main.log file will be the current log file. We have maximum backup file 5 apart from main.log file. In RollingFile appender we set the file name and file name pattern. Next we define two appenders – RollingFile and Console. LoggingFilter annotation on a ( final ) class that implements. Then we set some properties with key/value pairs. To use Slf4j annotation in spring boot application, you can checkout simple Spring Boot + Lombok example. This is useful for troubleshooting the configuration issues. The status in the log4j2 configuration is used internally by log4j2 components. Keeping the log4j2 XML or properties file in classpath will be picked up by the application automatically. If you are using log4j API version 1, then your file name should be log4j.xml or log4j.properties. If you are creating gradle based project in Eclipse then you can use the following dependencies in adle script: repositories %c: %m%nĪs we are using log4j2 API, so the configuration file name is log4j2.xml or log4j2.properties. Make sure you have configured Lombok for your IDE from the Lombok Installation section. PrerequisitesĪt least Java 8, lombok API, log4j2 with slf4j API, Spring, Spring Boot This starter dependency will resolve the similar kind of libraries as log4j2 with slf4j. You can even use spring-boot-starter-log4j2 API instead of log4j2 with slf4j for Spring Boot application. I am going to use log4j2 with slf4j API for Java, Spring and Spring Boot applications. You can use this log variable to create log statements. Lombok will provide log variable when you use annotation on class level. This annotation will reduce the code you write for creating logger variable. The example shown here will work for Java, Spring and Spring Boot applications. In this tutorial I will show you how to configure Lombok for logging using annotation in Java, Spring and Spring Boot applications.
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