java.lang.Object
- org.springframework.web.servlet.mvc.method.annotation.DeferredResultMethodReturnValueHandler

All Implemented Interfaces:
AsyncHandlerMethodReturnValueHandler, HandlerMethodReturnValueHandler
```
public class DeferredResultMethodReturnValueHandler
extends Object
implements AsyncHandlerMethodReturnValueHandler
```
Handler for return values of type DeferredResult, ListenableFuture, CompletionStage and any other async type with a registered adapter.
Since:
3.2
Author:
Rossen Stoyanchev

Constructor Summary
Constructors
Constructor Description
DeferredResultMethodReturnValueHandler()

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`Map<Class<?>,DeferredResultAdapter>`	`getAdapterMap()`	Deprecated. in 4.3.8, see comments on `DeferredResultAdapter`
`void`	`handleReturnValue(Object returnValue, MethodParameter returnType, ModelAndViewContainer mavContainer, NativeWebRequest webRequest)`	Handle the given return value by adding attributes to the model and setting a view or setting the `ModelAndViewContainer.setRequestHandled(boolean)` flag to `true` to indicate the response has been handled directly.
`boolean`	`isAsyncReturnValue(Object returnValue, MethodParameter returnType)`	Whether the given return value represents asynchronous computation.
`boolean`	`supportsReturnType(MethodParameter returnType)`	Whether the given method return type is supported by this handler.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DeferredResultMethodReturnValueHandler
```
public DeferredResultMethodReturnValueHandler()
```
- Method Detail
  - getAdapterMap
```
@Deprecated
public Map<Class<?>,DeferredResultAdapter> getAdapterMap()
```
    Deprecated.
    in 4.3.8, see comments on DeferredResultAdapter
    Return the map with DeferredResult adapters.
    By default the map contains adapters for DeferredResult, which simply downcasts, ListenableFuture, and CompletionStage.
    Returns:
    the map of adapters
  - supportsReturnType
```
public boolean supportsReturnType(MethodParameter returnType)
```
    Description copied from interface: HandlerMethodReturnValueHandler
    Whether the given method return type is supported by this handler.
    Specified by:
    supportsReturnType in interface HandlerMethodReturnValueHandler
    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 given return value represents asynchronous computation.
    Specified by:
    isAsyncReturnValue in interface AsyncHandlerMethodReturnValueHandler
    Parameters:
    returnValue - the value returned from the handler method
    returnType - the return type
    Returns:
    true if the return value type represents an async value
  - handleReturnValue
```
public void handleReturnValue(Object returnValue,
                              MethodParameter returnType,
                              ModelAndViewContainer mavContainer,
                              NativeWebRequest webRequest)
                       throws Exception
```
    Description copied from interface: HandlerMethodReturnValueHandler
    Handle the given return value by adding attributes to the model and setting a view or setting the ModelAndViewContainer.setRequestHandled(boolean) flag to true to indicate the response has been handled directly.
    Specified by:
    handleReturnValue in interface HandlerMethodReturnValueHandler
    Parameters:
    returnValue - the value returned from the handler method
    returnType - the type of the return value. This type must have previously been passed to HandlerMethodReturnValueHandler.supportsReturnType(org.springframework.core.MethodParameter) which must have returned true.
    mavContainer - the ModelAndViewContainer for the current request
    webRequest - the current request
    Throws:
    Exception - if the return value handling results in an error

Class DeferredResultMethodReturnValueHandler

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DeferredResultMethodReturnValueHandler

Method Detail

getAdapterMap

supportsReturnType

isAsyncReturnValue

handleReturnValue