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

所有已实现的接口:
AsyncHandlerMethodReturnValueHandler, HandlerMethodReturnValueHandler
```
public class HandlerMethodReturnValueHandlerComposite
extends Object
implements AsyncHandlerMethodReturnValueHandler
```
A HandlerMethodReturnValueHandler that wraps and delegates to others.
从以下版本开始:
4.0
作者:
Rossen Stoyanchev

字段概要
字段
修饰符和类型字段说明
static Log defaultLogger
Public for wrapping with fallback logger.

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

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
`HandlerMethodReturnValueHandlerComposite`	`addHandler(HandlerMethodReturnValueHandler returnValueHandler)`	Add the given `HandlerMethodReturnValueHandler`.
`HandlerMethodReturnValueHandlerComposite`	`addHandlers(List<? extends HandlerMethodReturnValueHandler> handlers)`	Add the given `HandlerMethodReturnValueHandlers`.
`void`	`clear()`	Clear the list of configured handlers.
`Log`	`getLogger()`	Return the currently configured Logger.
`List<HandlerMethodReturnValueHandler>`	`getReturnValueHandlers()`	Return a read-only list with the configured handlers.
`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.
`void`	`setLogger(Log logger)`	Set an alternative logger to use than the one based on the class name.
`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 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - defaultLogger
```
public static final Log defaultLogger
```
    Public for wrapping with fallback logger.
- 构造器详细资料
  - HandlerMethodReturnValueHandlerComposite
```
public HandlerMethodReturnValueHandlerComposite()
```
- 方法详细资料
  - setLogger
```
public void setLogger(Log logger)
```
    Set an alternative logger to use than the one based on the class name.
    参数:
    logger - the logger to use
    从以下版本开始:
    5.1
  - getLogger
```
public Log getLogger()
```
    Return the currently configured Logger.
    从以下版本开始:
    5.1
  - getReturnValueHandlers
```
public List<HandlerMethodReturnValueHandler> getReturnValueHandlers()
```
    Return a read-only list with the configured handlers.
  - clear
```
public void clear()
```
    Clear the list of configured handlers.
  - addHandler
```
public HandlerMethodReturnValueHandlerComposite addHandler(HandlerMethodReturnValueHandler returnValueHandler)
```
    Add the given HandlerMethodReturnValueHandler.
  - addHandlers
```
public HandlerMethodReturnValueHandlerComposite addHandlers(@Nullable
                                                            List<? extends HandlerMethodReturnValueHandler> handlers)
```
    Add the given HandlerMethodReturnValueHandlers.
  - 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.
    指定者:
    supportsReturnType 在接口中 HandlerMethodReturnValueHandler
    参数:
    returnType - the method return type to check
    返回:
    true if this handler supports the supplied return type; false otherwise
  - handleReturnValue
```
public void handleReturnValue(@Nullable
                              Object returnValue,
                              MethodParameter returnType,
                              Message<?> message)
                       throws Exception
```
    从接口复制的说明: HandlerMethodReturnValueHandler
    Handle the given return value.
    指定者:
    handleReturnValue 在接口中 HandlerMethodReturnValueHandler
    参数:
    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
    抛出:
    Exception - if the return value handling results in an error
  - isAsyncReturnValue
```
public boolean isAsyncReturnValue(Object returnValue,
                                  MethodParameter returnType)
```
    从接口复制的说明: 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.
    指定者:
    isAsyncReturnValue 在接口中 AsyncHandlerMethodReturnValueHandler
    参数:
    returnValue - the value returned from the handler method
    returnType - the type of the return value
    返回:
    true if the return value type represents an async value
  - toListenableFuture
```
@Nullable
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.
    指定者:
    toListenableFuture 在接口中 AsyncHandlerMethodReturnValueHandler
    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

类 HandlerMethodReturnValueHandlerComposite

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

defaultLogger

构造器详细资料

HandlerMethodReturnValueHandlerComposite

方法详细资料

setLogger

getLogger

getReturnValueHandlers

clear

addHandler

addHandlers

supportsReturnType

handleReturnValue

isAsyncReturnValue

toListenableFuture