Class DelegatingInvocableHandler
java.lang.Object
org.springframework.kafka.listener.adapter.DelegatingInvocableHandler
Delegates to an
InvocableHandlerMethod
based on the message payload type.
Matches a single, non-annotated parameter or one that is annotated with
Payload
. Matches must be
unambiguous.- Author:
- Gary Russell
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Constructor Summary
ConstructorDescriptionDelegatingInvocableHandler
(List<InvocableHandlerMethod> handlers, InvocableHandlerMethod defaultHandler, Object bean, BeanExpressionResolver beanExpressionResolver, BeanExpressionContext beanExpressionContext, BeanFactory beanFactory, Validator validator) Construct an instance with the supplied handlers for the bean. -
Method Summary
Modifier and TypeMethodDescriptionprotected InvocableHandlerMethod
findHandlerForPayload
(Class<? extends Object> payloadClass) getBean()
Return the bean for this handler.protected InvocableHandlerMethod
getHandlerForPayload
(Class<? extends Object> payloadClass) Determine theInvocableHandlerMethod
for the provided type.getMethodNameFor
(Object payload) Return a string representation of the method that will be invoked for this payload.boolean
Invoke the method with the given message.protected boolean
matchHandlerMethod
(Class<? extends Object> payloadClass, InvocableHandlerMethod handler)
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Constructor Details
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DelegatingInvocableHandler
public DelegatingInvocableHandler(List<InvocableHandlerMethod> handlers, @Nullable InvocableHandlerMethod defaultHandler, Object bean, @Nullable BeanExpressionResolver beanExpressionResolver, @Nullable BeanExpressionContext beanExpressionContext, @Nullable BeanFactory beanFactory, @Nullable Validator validator) Construct an instance with the supplied handlers for the bean.- Parameters:
handlers
- the handlers.defaultHandler
- the default handler.bean
- the bean.beanExpressionResolver
- the resolver.beanExpressionContext
- the context.beanFactory
- the bean factory.validator
- the validator.- Since:
- 2.5.11
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Method Details
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getBean
Return the bean for this handler.- Returns:
- the bean.
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invoke
Invoke the method with the given message.- Parameters:
message
- the message.providedArgs
- additional arguments.- Returns:
- the result of the invocation.
- Throws:
Exception
- raised if no suitable argument resolver can be found, or the method raised an exception.
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getHandlerForPayload
Determine theInvocableHandlerMethod
for the provided type.- Parameters:
payloadClass
- the payload class.- Returns:
- the handler.
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findHandlerForPayload
@Nullable protected InvocableHandlerMethod findHandlerForPayload(Class<? extends Object> payloadClass) -
matchHandlerMethod
protected boolean matchHandlerMethod(Class<? extends Object> payloadClass, InvocableHandlerMethod handler) -
getMethodNameFor
Return a string representation of the method that will be invoked for this payload.- Parameters:
payload
- the payload.- Returns:
- the method name.
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hasDefaultHandler
public boolean hasDefaultHandler()
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