io.micronaut.aop

Interface InvocationContext<T,R>

Type Parameters:

T - The declaring type

R - The result of the method call

All Superinterfaces:

AnnotationMetadata, AnnotationMetadataDelegate, AnnotationMetadataProvider, AnnotationSource, AttributeHolder, Executable<T,R>, MutableAttributeHolder

All Known Subinterfaces:

ConstructorInvocationContext<T>, MethodInvocationContext<T,R>

All Known Implementing Classes:

ConstructorInterceptorChain, InterceptorChain, MethodInterceptorChain

public interface InvocationContext<T,R>
extends Executable<T,R>, AnnotationMetadataDelegate, MutableAttributeHolder

An InvocationContext passed to one or many Interceptor instances. Attributes can be stored within the context and shared between multiple Interceptor implementations. The proceed() method should be called to proceed to the next Interceptor with the last interceptor in the chain being the original decorated method implementation.

The parameters to pass to the next Interceptor can be mutated using MutableArgumentValue interface returned by the getParameters() method

Since:

1.0

Author:

Graeme Rocher

Field Summary

Fields inherited from interface io.micronaut.core.annotation.AnnotationMetadata

CLASS_NAME_SUFFIX, EMPTY_METADATA, VALUE_MEMBER

Fields inherited from interface io.micronaut.core.annotation.AnnotationSource

EMPTY

Method Summary

Modifier and Type	Method and Description
default Class<T>	getDeclaringType()
default InterceptorKind	getKind()
Map<String,MutableArgumentValue<?>>	getParameters() Returns the current parameters as a map of mutable argument values.
default Map<String,Object>	getParameterValueMap() Returns the current state of the parameters as a map keyed by parameter name.
default Object[]	getParameterValues() Returns the current state of the parameters as an array by parameter index.
T	getTarget()
R	proceed() Proceeds with the invocation.
R	proceed(Interceptor from) Proceeds with the invocation using the given interceptor as a position to start from.
default InvocationContext<T,R>	setAttribute(CharSequence name, Object value) Sets an attribute on the message.

Methods inherited from interface io.micronaut.core.type.Executable

getArguments, invoke

Methods inherited from interface io.micronaut.core.annotation.AnnotationMetadataDelegate

booleanValue, booleanValue, booleanValue, booleanValue, classValue, classValue, classValue, classValue, classValues, classValues, classValues, classValues, doubleValue, doubleValue, doubleValue, enumValue, enumValue, enumValue, enumValue, enumValues, enumValues, enumValues, enumValues, findAnnotation, findAnnotation, findDeclaredAnnotation, findDeclaredAnnotation, findRepeatableAnnotation, findRepeatableAnnotation, getAnnotation, getAnnotation, getAnnotationNameByStereotype, getAnnotationNameByStereotype, getAnnotationNames, getAnnotationNamesByStereotype, getAnnotationNamesByStereotype, getAnnotationType, getAnnotationType, getAnnotationTypeByStereotype, getAnnotationTypeByStereotype, getAnnotationTypesByStereotype, getAnnotationTypesByStereotype, getAnnotationTypesByStereotype, getAnnotationValuesByType, getDeclaredAnnotation, getDeclaredAnnotation, getDeclaredAnnotationNameByStereotype, getDeclaredAnnotationNames, getDeclaredAnnotationNamesByStereotype, getDeclaredAnnotationTypeByStereotype, getDeclaredAnnotationTypeByStereotype, getDeclaredAnnotationValuesByType, getDeclaredMetadata, getDefaultValue, getDefaultValue, getDefaultValue, getDefaultValue, getDefaultValues, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValues, getValues, hasAnnotation, hasAnnotation, hasDeclaredAnnotation, hasDeclaredAnnotation, hasDeclaredStereotype, hasDeclaredStereotype, hasDeclaredStereotype, hasPropertyExpressions, hasSimpleAnnotation, hasSimpleDeclaredAnnotation, hasStereotype, hasStereotype, hasStereotype, hasStereotype, intValue, intValue, intValue, isAnnotationPresent, isDeclaredAnnotationPresent, isEmpty, isFalse, isFalse, isPresent, isPresent, isRepeatableAnnotation, isRepeatableAnnotation, isTrue, isTrue, longValue, longValue, stringValue, stringValue, stringValue, stringValue, stringValues, stringValues, stringValues, stringValues, synthesize, synthesize, synthesizeAll, synthesizeAnnotationsByType, synthesizeDeclared, synthesizeDeclared, synthesizeDeclared, synthesizeDeclaredAnnotationsByType

Methods inherited from interface io.micronaut.core.annotation.AnnotationMetadataProvider

getAnnotationMetadata

Methods inherited from interface io.micronaut.core.annotation.AnnotationMetadata

getAnnotationValuesByName, getDeclaredAnnotationValuesByName, getValues, hasDeclaredStereotype, isAnnotationPresent, isDeclaredAnnotationPresent

Methods inherited from interface io.micronaut.core.attr.MutableAttributeHolder

getAttributes, removeAttribute

Methods inherited from interface io.micronaut.core.attr.AttributeHolder

getAttribute, getAttribute

Method Detail

getParameters

@NonNull
Map<String,MutableArgumentValue<?>> getParameters()

Returns the current parameters as a map of mutable argument values. This method allows mutation of the argument values and is generally more expensive than using getParameterValues() and Executable.getArguments() directly, hence should be used with care.

Returns:

The bound ArgumentValue instances

getTarget

@NonNull
T getTarget()

Returns:

The target object

proceed

@Nullable
R proceed()
             throws RuntimeException

Proceeds with the invocation. If this is the last interceptor in the chain then the final implementation method is invoked

Returns:

The return value of the method

Throws:

RuntimeException - chain may throw RTE

proceed

@Nullable
R proceed(Interceptor from)
             throws RuntimeException

Proceeds with the invocation using the given interceptor as a position to start from. Mainly useful for Introduction advise where you want to invoke the target multiple times or where you want to repeat the entire chain.

Parameters:

from - The interceptor to start from (note: will not be included in the execution)

Returns:

The return value of the method

Throws:

RuntimeException - chain may throw RTE

getKind

@NonNull
default InterceptorKind getKind()

Returns:

An enum representing the kind of interception that is occurring.

Since:

3.0.0

getDeclaringType

default Class<T> getDeclaringType()

Specified by:

getDeclaringType in interface Executable<T,R>

Returns:

The declaring type

setAttribute

default InvocationContext<T,R> setAttribute(@NonNull
                                            CharSequence name,
                                            Object value)

Description copied from interface: MutableAttributeHolder

Sets an attribute on the message.

Specified by:

setAttribute in interface MutableAttributeHolder

Parameters:

name - The name of the attribute

value - The value of the attribute

Returns:

This message

getParameterValues

@NonNull
default Object[] getParameterValues()

Returns the current state of the parameters as an array by parameter index. Note that mutations to the array have no effect. If you wish to mutate the parameters use getParameters() and the MutableArgumentValue interface instead

Returns:

The bound ArgumentValue instances

getParameterValueMap

@NonNull
default Map<String,Object> getParameterValueMap()

Returns the current state of the parameters as a map keyed by parameter name.

Returns:

A map of parameter names to values