CompletableFutureReturnValueHandler (Spring Framework 4.3.30.RELEASE API)

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

所有已实现的接口:
AsyncHandlerMethodReturnValueHandler, HandlerMethodReturnValueHandler
```
@UsesJava8
public class CompletableFutureReturnValueHandler
extends AbstractAsyncReturnValueHandler
```
Support for CompletableFuture (and as of 4.3.7 also CompletionStage) as a return value type.
从以下版本开始:
4.2
作者:
Sebastien Deleuze, Juergen Hoeller

构造器概要
构造器
构造器说明
CompletableFutureReturnValueHandler()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`boolean`	`supportsReturnType(MethodParameter returnType)`	Whether the given method return type is supported by this handler.
`ListenableFuture<?>`	`toListenableFuture(Object returnValue, MethodParameter returnType)`	Adapt the asynchronous return value to a `ListenableFuture`.

从类继承的方法 org.springframework.messaging.handler.invocation.AbstractAsyncReturnValueHandler
handleReturnValue, isAsyncReturnValue

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - CompletableFutureReturnValueHandler
```
public CompletableFutureReturnValueHandler()
```
- 方法详细资料
  - supportsReturnType
```
public boolean supportsReturnType(MethodParameter returnType)
```
    从接口复制的说明: HandlerMethodReturnValueHandler
    Whether the given method return type is supported by this handler.
    参数:
    returnType - the method return type to check
    返回:
    true if this handler supports the supplied return type; false otherwise
  - toListenableFuture
```
public ListenableFuture<?> toListenableFuture(Object returnValue,
                                              MethodParameter returnType)
```
    从接口复制的说明: 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.
    参数:
    returnValue - the value returned from the handler method
    returnType - the type of the return value
    返回:
    the resulting ListenableFuture, or null in which case no further handling will be performed