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// import required classes import org.slf4j.Logger; import org.slf4j.LoggerFactory; // define logger private static final Logger LOGGER = LoggerFactory.getLogger(AuthenticationServiceImpl.class); // use in code try { // logic } catch (final StorageException e) { final String message = "(" + accountId + ") fail."; LOGGER.error(message, e); throw new AuthenticationServiceException(message, e); } |
FATAL logging level
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(marker usage example)
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// import utility import net.bolbat.utils.logging.LoggingUtils; // use in code try { // logic } catch (final ManagerException e) { final String message = "Can't initialize persistence service."; LOGGER.error(LoggingUtils.FATAL, message, e); throw new ServiceInstantiationException(message, e); } |
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- default no-operation (NOP) logger, included in slf4j-api
logback : (version managed by our maven parent project pom.xml)
Code Block language xml <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> </dependency>
apache log4j : (version managed by our maven parent project pom.xml)
Code Block language xml <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </dependency>
apache commons-logging : (version managed by our maven parent project pom.xml)
Code Block language xml <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-jcl</artifactId> </dependency>
java util logging (version managed by our maven parent project pom.xml)
Code Block language xml <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-jdk14</artifactId> </dependency>
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