groovy.util.logging

Annotation Type Log4j

@Documented
 @Retention(value=SOURCE)
 @Target(value=TYPE)
public @interface Log4j

This local transform adds a logging ability to your program using Log4j logging. Every method call on a unbound variable named log will be mapped to a call to the logger. For this a log field will be inserted in the class. If the field already exists the usage of this transform will cause a compilation error. The method name will be used to determine what to call on the logger.

 log.name(exp)
 

is mapped to

 if (log.isNameEnabled() {
    log.name(exp)
 }

Here name is a place holder for info, debug, warning, error, etc. If the expression exp is a constant or only a variable access the method call will not be transformed. But this will still cause a call on the injected logger.

Since:

1.8.0

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
String	category
Class<? extends LogASTTransformation.LoggingStrategy>	loggingStrategy
String	value
String	visibilityId If specified, must match the "id" attribute in a VisibilityOptions annotation to enable a custom visibility.

Element Detail

value

public abstract String value

Default:

"log"

category

public abstract String category

Default:

"##default-category-name##"

visibilityId

public abstract String visibilityId

If specified, must match the "id" attribute in a VisibilityOptions annotation to enable a custom visibility.

Since:

3.0.0

Default:

"<DummyUndefinedMarkerString-DoNotUse>"

loggingStrategy

public abstract Class<? extends LogASTTransformation.LoggingStrategy> loggingStrategy

Default:

groovy.util.logging.Log4j.Log4jLoggingStrategy.class