Package io.micrometer.common.annotation

Class AnnotationHandler<T>

java.lang.Object

io.micrometer.common.annotation.AnnotationHandler<T>

Type Parameters:

T - type which should be enriched with KeyValue information

public class AnnotationHandler<T>
extends Object

This class is able to find all methods annotated with the Micrometer annotations. All methods mean that if you have both an interface and an implementation annotated with Micrometer annotations then this class is capable of finding both of them and merging into one set of information.

This information is then used to add proper key-values to objects such as span or timer from the method arguments that are annotated with a proper annotation. Code ported from Spring Cloud Sleuth.

Since:

1.11.0

Constructor Summary

Constructors

Constructor	Description
AnnotationHandler(BiConsumer<KeyValue,T> keyValueConsumer, Function<Class<? extends ValueResolver>,? extends ValueResolver> resolverProvider, Function<Class<? extends ValueExpressionResolver>,? extends ValueExpressionResolver> expressionResolverProvider, Class<? extends Annotation> annotation, BiFunction<Annotation,Object,KeyValue> toKeyValue)	Creates a new instance of AnnotationHandler.

Method Summary

Modifier and Type	Method	Description
void	addAnnotatedParameters(T objectToModify, org.aspectj.lang.ProceedingJoinPoint pjp)	Modifies the object with KeyValue related information.
Function<Class<? extends ValueExpressionResolver>,? extends ValueExpressionResolver>	getExpressionResolverProvider()
Function<Class<? extends ValueResolver>,? extends ValueResolver>	getResolverProvider()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AnnotationHandler

public AnnotationHandler(BiConsumer<KeyValue,T> keyValueConsumer,
 Function<Class<? extends ValueResolver>,? extends ValueResolver> resolverProvider,
 Function<Class<? extends ValueExpressionResolver>,? extends ValueExpressionResolver> expressionResolverProvider,
 Class<? extends Annotation> annotation,
 BiFunction<Annotation,Object,KeyValue> toKeyValue)

Creates a new instance of AnnotationHandler.

Parameters:

keyValueConsumer - consumer that takes a KeyValue and mutates the <T> type

resolverProvider - function converting a class extending a ValueResolver to an instance of that class

expressionResolverProvider - function converting a class extending a ValueExpressionResolver to an instance of that class

annotation - annotation containing KeyValue related information

toKeyValue - function converting the annotation and the expression or annotation value to a KeyValue

Method Details

addAnnotatedParameters

public void addAnnotatedParameters(T objectToModify,
 org.aspectj.lang.ProceedingJoinPoint pjp)

Modifies the object with KeyValue related information.

Parameters:

objectToModify - object to modify

pjp - proceeding join point

getResolverProvider

public Function<Class<? extends ValueResolver>,? extends ValueResolver> getResolverProvider()

getExpressionResolverProvider

public Function<Class<? extends ValueExpressionResolver>,? extends ValueExpressionResolver> getExpressionResolverProvider()