Overview  Package   Class  Deprecated  Index  Help 
Groovy Documentation
FRAMES    NO FRAMES    
SUMMARY: REQUIRED | OPTIONAL DETAIL: ELEMENT

groovy.util.logging
[Java] Annotation Type Log

java.lang.Object
  groovy.util.logging.Log

@Retention(RetentionPolicy.SOURCE)
@Target({ElementType.TYPE})
@GroovyASTTransformationClass("org.codehaus.groovy.transform.LogASTTransformation")
public @interface Log

This local transform adds a logging ability to your program using java.util.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.isLoggable(Level.NAME) {
    log.name(exp)
 }
Here name is a place holder for info, fine, finer, finest, config, warning, severe. NAME is name transformed to upper case. if anything else is used it will result in an exception at runtime. 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.
Authors:
Guillaume Laforge
Jochen Theodorou
Dinko Srkoc
Hamlet D'Arcy
Raffaele Cigni
Alberto Vilches Raton
Since:
1.8.0

Nested Class Summary
static class Log.JavaUtilLoggingStrategy

This class contains the logic of how to weave a Java Util Logging logger into the host class.
   
Optional Element Summary
java.lang.Class loggingStrategy

@default JavaUtilLoggingStrategy.class
java.lang.String value

@default "log"
 
Method Summary
 
Methods inherited from class java.lang.Object
java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()
 

Element Detail

loggingStrategy

public java.lang.Class loggingStrategy
@default JavaUtilLoggingStrategy.class

value

public java.lang.String value
@default "log"

 

Groovy Documentation