org.openrdf.http.server
Class ServerInterceptor

java.lang.Object
  org.springframework.web.servlet.handler.HandlerInterceptorAdapter
      org.openrdf.http.server.ServerInterceptor

All Implemented Interfaces:

org.springframework.web.servlet.HandlerInterceptor

Direct Known Subclasses:

ProtocolInterceptor, RepositoryInterceptor

public abstract class ServerInterceptor
extends org.springframework.web.servlet.handler.HandlerInterceptorAdapter

Base class for single-use request interceptors. This implementation sets the thread name to something sensible at the start of the request handling and resets the name at the end. This is useful for logging frameworks that make use of thread names, such as Log4J. Should not be a singleton bean! Configure as inner bean in openrdf-servlet.xml

Author:

Herko ter Horst

Constructor Summary

ServerInterceptor()

Method Summary

void	afterCompletion(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Object handler, Exception exception)
protected void	cleanUpResources() Clean up resources used in handling this request.
protected abstract String	getThreadName() Determine the thread name to use.
boolean	preHandle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Object handler)
protected void	setRequestAttributes(javax.servlet.http.HttpServletRequest request) Set attributes for this request.

Methods inherited from class org.springframework.web.servlet.handler.HandlerInterceptorAdapter

postHandle

Methods inherited from class java.lang.Object

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

Constructor Detail

ServerInterceptor

public ServerInterceptor()

Method Detail

preHandle

public boolean preHandle(javax.servlet.http.HttpServletRequest request,
                         javax.servlet.http.HttpServletResponse response,
                         Object handler)
                  throws Exception

Specified by:

preHandle in interface org.springframework.web.servlet.HandlerInterceptor

Overrides:

preHandle in class org.springframework.web.servlet.handler.HandlerInterceptorAdapter

Throws:

Exception

afterCompletion

public void afterCompletion(javax.servlet.http.HttpServletRequest request,
                            javax.servlet.http.HttpServletResponse response,
                            Object handler,
                            Exception exception)
                     throws Exception

Specified by:

afterCompletion in interface org.springframework.web.servlet.HandlerInterceptor

Overrides:

afterCompletion in class org.springframework.web.servlet.handler.HandlerInterceptorAdapter

Throws:

Exception

getThreadName

protected abstract String getThreadName()
                                 throws ServerHTTPException

Determine the thread name to use. Called before the request is forwarded to a handler.

Returns:

a name that makes sense based on the request

Throws:

ServerHTTPException - if it was impossible to determine a name due to an internal error

setRequestAttributes

protected void setRequestAttributes(javax.servlet.http.HttpServletRequest request)
                             throws ClientHTTPException,
                                    ServerHTTPException

Set attributes for this request. Called before the request is forwarded to a handler. By default, this method does nothing.

Parameters:

request - the request

Throws:

ClientHTTPException - if it was impossible to set one or more attributes due to a bad request on the part of the client

ServerHTTPException - if it was impossible to set one or more attributes due to an internal error

cleanUpResources

protected void cleanUpResources()
                         throws ServerHTTPException

Clean up resources used in handling this request. Called after the request is handled and a the view is rendered (or an exception has occurred). By default, this method does nothing.

Throws:

ServerHTTPException - if some resources could not be cleaned up because of an internal error