Class InvocableHandlerMethod

Constructor Detail

• InvocableHandlerMethod

  public InvocableHandlerMethod​(HandlerMethod handlerMethod)

  Create an instance from a HandlerMethod.

• InvocableHandlerMethod

  public InvocableHandlerMethod​(Object bean,
                                Method method)

  Create an instance from a bean instance and a method.

• InvocableHandlerMethod

  public InvocableHandlerMethod​(Object bean,
                                String methodName,
                                Class<?>... parameterTypes)
                         throws NoSuchMethodException

  Construct a new handler method with the given bean instance, method name and parameters.

  Parameters:

  bean - the object bean

  methodName - the method name

  parameterTypes - the method parameter types

  Throws:

  NoSuchMethodException - when the method cannot be found

Method Detail

• setMessageMethodArgumentResolvers

  public void setMessageMethodArgumentResolvers​(HandlerMethodArgumentResolverComposite argumentResolvers)

  Set HandlerMethodArgumentResolvers to use to use for resolving method argument values.

• setParameterNameDiscoverer

  public void setParameterNameDiscoverer​(ParameterNameDiscoverer parameterNameDiscoverer)

  Set the ParameterNameDiscoverer for resolving parameter names when needed (e.g. default request attribute name).

  Default is a DefaultParameterNameDiscoverer.

• invoke

  @Nullable
  public Object invoke​(Message<?> message,
                       Object... providedArgs)
                throws Exception

  Invoke the method after resolving its argument values in the context of the given message.

  Argument values are commonly resolved through HandlerMethodArgumentResolvers. The providedArgs parameter however may supply argument values to be used directly, i.e. without argument resolution.

  Delegates to getMethodArgumentValues(org.springframework.messaging.Message<?>, java.lang.Object...) and calls doInvoke(java.lang.Object...) with the resolved arguments.

  Parameters:

  message - the current message being processed

  providedArgs - "given" arguments matched by type, not resolved

  Returns:

  the raw value returned by the invoked method

  Throws:

  Exception - raised if no suitable argument resolver can be found, or if the method raised an exception

  See Also:

  getMethodArgumentValues(org.springframework.messaging.Message<?>, java.lang.Object...), doInvoke(java.lang.Object...)

• getMethodArgumentValues

  protected Object[] getMethodArgumentValues​(Message<?> message,
                                             Object... providedArgs)
                                      throws Exception

  Get the method argument values for the current message, checking the provided argument values and falling back to the configured argument resolvers.

  The resulting array will be passed into doInvoke(java.lang.Object...).

  Throws:

  Exception

  Since:

  5.1.2

• doInvoke

  @Nullable
  protected Object doInvoke​(Object... args)
                     throws Exception

  Invoke the handler method with the given argument values.

  Throws:

  Exception