java.lang.Object
- org.springframework.messaging.handler.invocation.AbstractAsyncReturnValueHandler

All Implemented Interfaces:
AsyncHandlerMethodReturnValueHandler, HandlerMethodReturnValueHandler
Direct Known Subclasses:
CompletableFutureReturnValueHandler, ListenableFutureReturnValueHandler
```
public abstract class AbstractAsyncReturnValueHandler
extends Object
implements AsyncHandlerMethodReturnValueHandler
```
Convenient base class for AsyncHandlerMethodReturnValueHandler implementations that support only asynchronous (Future-like) return values and merely serve as adapters of such types to Spring's ListenableFuture.
Since:
4.2
Author:
Sebastien Deleuze

Constructor Summary
Constructors
Constructor Description
AbstractAsyncReturnValueHandler()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`handleReturnValue(Object returnValue, MethodParameter returnType, Message<?> message)`	Handle the given return value.
`boolean`	`isAsyncReturnValue(Object returnValue, MethodParameter returnType)`	Whether the return value represents an asynchronous, Future-like type with success and error callbacks.

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

Methods inherited from interface org.springframework.messaging.handler.invocation.AsyncHandlerMethodReturnValueHandler
toListenableFuture

Methods inherited from interface org.springframework.messaging.handler.invocation.HandlerMethodReturnValueHandler
supportsReturnType

- Constructor Detail
  - AbstractAsyncReturnValueHandler
```
public AbstractAsyncReturnValueHandler()
```
- Method Detail
  - 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
    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
  - handleReturnValue
```
public void handleReturnValue(Object returnValue,
                              MethodParameter returnType,
                              Message<?> message)
```
    Description copied from interface: HandlerMethodReturnValueHandler
    Handle the given return value.
    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) and it must have returned true.
    message - the message that caused this method to be called

Class AbstractAsyncReturnValueHandler

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.springframework.messaging.handler.invocation.AsyncHandlerMethodReturnValueHandler

Methods inherited from interface org.springframework.messaging.handler.invocation.HandlerMethodReturnValueHandler

Constructor Detail

AbstractAsyncReturnValueHandler

Method Detail

isAsyncReturnValue

handleReturnValue