Package org.springframework.web.servlet.function.support

Class HandlerFunctionAdapter

java.lang.Object

org.springframework.web.servlet.function.support.HandlerFunctionAdapter

All Implemented Interfaces:

Ordered, HandlerAdapter

public class HandlerFunctionAdapter
extends Object
implements HandlerAdapter, Ordered

HandlerAdapter implementation that supports HandlerFunctions.

Since:

5.2

Author:

Arjen Poutsma

Field Summary

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
HandlerFunctionAdapter()

Method Summary

Modifier and Type	Method	Description
long	getLastModified(HttpServletRequest request, Object handler)	Same contract as for HttpServlet's getLastModified method.
int	getOrder()	Get the order value of this object.
ModelAndView	handle(HttpServletRequest servletRequest, HttpServletResponse servletResponse, Object handler)	Use the given handler to handle this request.
void	setAsyncRequestTimeout(long timeout)	Specify the amount of time, in milliseconds, before concurrent handling should time out.
void	setOrder(int order)	Specify the order value for this HandlerAdapter bean.
boolean	supports(Object handler)	Given a handler instance, return whether this HandlerAdapter can support it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

HandlerFunctionAdapter

public HandlerFunctionAdapter()

Method Details

setOrder

public void setOrder(int order)

Specify the order value for this HandlerAdapter bean.

The default value is Ordered.LOWEST_PRECEDENCE, meaning non-ordered.

See Also:

• Ordered.getOrder()

getOrder

public int getOrder()

Description copied from interface: Ordered

Get the order value of this object.

Higher values are interpreted as lower priority. As a consequence, the object with the lowest value has the highest priority (somewhat analogous to Servlet load-on-startup values).

Same order values will result in arbitrary sort positions for the affected objects.

Specified by:

getOrder in interface Ordered

Returns:

the order value

See Also:

• Ordered.HIGHEST_PRECEDENCE
• Ordered.LOWEST_PRECEDENCE

setAsyncRequestTimeout

public void setAsyncRequestTimeout(long timeout)

Specify the amount of time, in milliseconds, before concurrent handling should time out. In Servlet 3, the timeout begins after the main request processing thread has exited and ends when the request is dispatched again for further processing of the concurrently produced result.

If this value is not set, the default timeout of the underlying implementation is used.

A value of 0 or less indicates that the asynchronous operation will never time out.

Parameters:

timeout - the timeout value in milliseconds

supports

public boolean supports(Object handler)

Description copied from interface: HandlerAdapter

Given a handler instance, return whether this HandlerAdapter can support it. Typical HandlerAdapters will base the decision on the handler type. HandlerAdapters will usually only support one handler type each.

A typical implementation:

return (handler instanceof MyHandler);

Specified by:

supports in interface HandlerAdapter

Parameters:

handler - the handler object to check

Returns:

whether this object can use the given handler

handle

@Nullable
public ModelAndView handle(HttpServletRequest servletRequest,
 HttpServletResponse servletResponse,
 Object handler)
                    throws Exception

Description copied from interface: HandlerAdapter

Use the given handler to handle this request. The workflow that is required may vary widely.

Specified by:

handle in interface HandlerAdapter

Parameters:

servletRequest - current HTTP request

servletResponse - current HTTP response

handler - the handler to use. This object must have previously been passed to the supports method of this interface, which must have returned true.

Returns:

a ModelAndView object with the name of the view and the required model data, or null if the request has been handled directly

Throws:

Exception - in case of errors

getLastModified

public long getLastModified(HttpServletRequest request,
 Object handler)

Description copied from interface: HandlerAdapter

Same contract as for HttpServlet's getLastModified method. Can simply return -1 if there's no support in the handler class.

Specified by:

getLastModified in interface HandlerAdapter

Parameters:

request - current HTTP request

handler - the handler to use

Returns:

the lastModified value for the given handler