Class ReactiveReturnValueHandler

Constructor Detail

• ReactiveReturnValueHandler

  public ReactiveReturnValueHandler()

• ReactiveReturnValueHandler

  public ReactiveReturnValueHandler​(ReactiveAdapterRegistry adapterRegistry)

Method Detail

• supportsReturnType

  public boolean supportsReturnType​(MethodParameter returnType)

  Description copied from interface: HandlerMethodReturnValueHandler
  Whether the given method return type is supported by this handler.

  Parameters:

  returnType - the method return type to check

  Returns:

  true if this handler supports the supplied return type; false otherwise

• isAsyncReturnValue

  public boolean isAsyncReturnValue​(Object returnValue,
                                    MethodParameter returnType)

  Description copied from interface: AsyncHandlerMethodReturnValueHandler
  Whether the return value represents an asynchronous, Future-like type with success and error callbacks. If this method returns true, then AsyncHandlerMethodReturnValueHandler.toListenableFuture(java.lang.Object, org.springframework.core.MethodParameter) is invoked next. If it returns false, then HandlerMethodReturnValueHandler.handleReturnValue(java.lang.Object, org.springframework.core.MethodParameter, org.springframework.messaging.Message<?>) is called.

  Note: this method will only be invoked after HandlerMethodReturnValueHandler.supportsReturnType(org.springframework.core.MethodParameter) is called and it returns true.

  Specified by:

  isAsyncReturnValue in interface AsyncHandlerMethodReturnValueHandler

  Overrides:

  isAsyncReturnValue in class AbstractAsyncReturnValueHandler

  Parameters:

  returnValue - the value returned from the handler method

  returnType - the type of the return value

  Returns:

  true if the return value type represents an async value

• toListenableFuture

  public ListenableFuture<?> toListenableFuture​(Object returnValue,
                                                MethodParameter returnType)

  Description copied from interface: AsyncHandlerMethodReturnValueHandler
  Adapt the asynchronous return value to a ListenableFuture. Implementations should consider returning an instance of SettableListenableFuture. Return value handling will then continue when the ListenableFuture is completed with either success or error.

  Note: this method will only be invoked after HandlerMethodReturnValueHandler.supportsReturnType(org.springframework.core.MethodParameter) is called and it returns true.

  Parameters:

  returnValue - the value returned from the handler method

  returnType - the type of the return value

  Returns:

  the resulting ListenableFuture, or null in which case no further handling will be performed