Just do what SLF4J does to discover the binding: final StaticLoggerBinder binder = StaticLoggerBinder.getSingleton(); Now you can try to find out what is the actual implementation logback in my case: System.out.println(binder.getLoggerFactory()); System.out.println(binder.getLoggerFactoryClassStr()); This prints: ch.qos.logback.classic.LoggerContext[default] ch.qos.logback.classic.selector.DefaultContextSelector
Using hints found in the documentation here: (quoted) You can configure the output shown when running with sbt in four ways: 1) turn off color, 2) show short stack traces, 3) full stack traces, and 4) show durations for everything. To do so you must pass a -o argument to ScalaTest, and after the -o, … Read more
Programmatically, with logback: setLoggingLevel(ch.qos.logback.classic.Level.DEBUG); where public static void setLoggingLevel(ch.qos.logback.classic.Level level) { ch.qos.logback.classic.Logger root = (ch.qos.logback.classic.Logger) org.slf4j.LoggerFactory.getLogger(ch.qos.logback.classic.Logger.ROOT_LOGGER_NAME); root.setLevel(level); }
3 is the best. 3 and 2 generate the same (or nearly the same) bytecode, but 3 is easier to type and is shorter, so 3 is better than 2. If trace is not enabled, 1 must perform string concatenation (“Time taken to store ” + count + ….) which is somewhat expensive, while 2 … Read more
EDIT 2020-09-21: Since 3.4.0, Mockito supports mocking static methods, API is still incubating and is likely to change, in particular around stubbing and verification. It requires the mockito-inline artifact. And you don’t need to prepare the test or use any specific runner. All you need to do is : @Test public void name() { try … Read more
Create a test rule: import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.read.ListAppender; import org.junit.rules.TestRule; import org.junit.runner.Description; import org.junit.runners.model.Statement; import org.slf4j.LoggerFactory; import java.util.List; import java.util.stream.Collectors; public class LoggerRule implements TestRule { private final ListAppender<ILoggingEvent> listAppender = new ListAppender<>(); private final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME); @Override public Statement apply(Statement base, Description description) { return new Statement() { @Override … Read more
Use logging.file.name instead of logging.file In higher versions of spring-boot-parent(from version 2.2.0), property logging.file is deprecated.
slf4j is only an API. You should have a concrete implementation (for example log4j). This concrete implementation has a config file which tells you where to store the logs. When slf4j catches a log messages with a logger, it is given to an appender which decides what to do with the message. By default, the … Read more
log4j-over-slf4j Use this if your code or some libraries you are using uses Log4j directly, but you want to use a different SLF4J binding than Log4j. It will route the Log4j API calls to SLF4J to the binding you choose. You need to remove the Log4j library from your classpath and replace it with this … Read more
You need to call SLF4JBridgeHandler.install(). You also need to enable all log levels at the root logger (reason in excerpt below) in java.util.logging and remove the default console appender. This handler will redirect jul logging to SLF4J. However, only logs enabled in j.u.l. will be redirected. For example, if a log statement invoking a j.u.l. … Read more