Package org.springframework.kafka.listener.adapter

Class DelegatingInvocableHandler

java.lang.Object
org.springframework.kafka.listener.adapter.DelegatingInvocableHandler
public class DelegatingInvocableHandler extends Object
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.

  • Constructor Details

    • DelegatingInvocableHandler

      @Deprecated public DelegatingInvocableHandler(List<org.springframework.messaging.handler.invocation.InvocableHandlerMethod> handlers, Object bean, org.springframework.beans.factory.config.BeanExpressionResolver beanExpressionResolver, org.springframework.beans.factory.config.BeanExpressionContext beanExpressionContext)
      Deprecated.
      in favor of DelegatingInvocableHandler(List, InvocableHandlerMethod, Object, BeanExpressionResolver, BeanExpressionContext, BeanFactory, Validator)
      Construct an instance with the supplied handlers for the bean.
      Parameters:
      handlers - the handlers.
      bean - the bean.
      beanExpressionResolver - the expression resolver.
      beanExpressionContext - the expression context.

    • DelegatingInvocableHandler

      @Deprecated public DelegatingInvocableHandler(List<org.springframework.messaging.handler.invocation.InvocableHandlerMethod> handlers, @Nullable org.springframework.messaging.handler.invocation.InvocableHandlerMethod defaultHandler, Object bean, org.springframework.beans.factory.config.BeanExpressionResolver beanExpressionResolver, org.springframework.beans.factory.config.BeanExpressionContext beanExpressionContext)
      Deprecated.
      in favor of DelegatingInvocableHandler(List, InvocableHandlerMethod, Object, BeanExpressionResolver, BeanExpressionContext, BeanFactory, 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.
      Since:
      2.1.3

    • DelegatingInvocableHandler

      public DelegatingInvocableHandler(List<org.springframework.messaging.handler.invocation.InvocableHandlerMethod> handlers, @Nullable org.springframework.messaging.handler.invocation.InvocableHandlerMethod defaultHandler, Object bean, @Nullable org.springframework.beans.factory.config.BeanExpressionResolver beanExpressionResolver, @Nullable org.springframework.beans.factory.config.BeanExpressionContext beanExpressionContext, @Nullable org.springframework.beans.factory.BeanFactory beanFactory, @Nullable org.springframework.validation.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

  • Method Details

    • getBean

      public Object getBean()
      Return the bean for this handler.
      Returns:
      the bean.

    • invoke

      public Object invoke(org.springframework.messaging.Message<?> message, Object... providedArgs) throws Exception
      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.

    • getHandlerForPayload

      protected org.springframework.messaging.handler.invocation.InvocableHandlerMethod getHandlerForPayload(Class<? extends Object> payloadClass)
      Determine the InvocableHandlerMethod for the provided type.
      Parameters:
      payloadClass - the payload class.
      Returns:
      the handler.

    • findHandlerForPayload

      @Nullable protected org.springframework.messaging.handler.invocation.InvocableHandlerMethod findHandlerForPayload(Class<? extends Object> payloadClass)

    • matchHandlerMethod

      protected boolean matchHandlerMethod(Class<? extends Object> payloadClass, org.springframework.messaging.handler.invocation.InvocableHandlerMethod handler)

    • getMethodNameFor

      public String getMethodNameFor(Object payload)
      Return a string representation of the method that will be invoked for this payload.
      Parameters:
      payload - the payload.
      Returns:
      the method name.

    • hasDefaultHandler

      public boolean hasDefaultHandler()