Package org.apache.http.impl.client

Class DefaultRequestDirector

java.lang.Object

org.apache.http.impl.client.DefaultRequestDirector

All Implemented Interfaces:

RequestDirector

public class DefaultRequestDirector
extends Object
implements RequestDirector

Default implementation of RequestDirector.
This class replaces the HttpMethodDirector in HttpClient 3.

Since:

4.0

Version:

$Revision: 676023 $

Author:

Roland Weber, Oleg Kalnichevski

Field Summary

Fields

Modifier and Type	Field	Description
protected ClientConnectionManager	connManager	The connection manager.
protected HttpProcessor	httpProcessor	The HTTP protocol processor.
protected ConnectionKeepAliveStrategy	keepAliveStrategy	The keep-alive duration strategy.
protected ManagedClientConnection	managedConn	The currently allocated connection.
protected HttpParams	params	The HTTP parameters.
protected RedirectHandler	redirectHandler	The redirect handler.
protected HttpRequestExecutor	requestExec	The request executor.
protected HttpRequestRetryHandler	retryHandler	The request retry handler.
protected ConnectionReuseStrategy	reuseStrategy	The connection re-use strategy.
protected HttpRoutePlanner	routePlanner	The route planner.

Constructor Summary

Constructors

Constructor

Description

DefaultRequestDirector(HttpRequestExecutor requestExec, ClientConnectionManager conman, ConnectionReuseStrategy reustrat, ConnectionKeepAliveStrategy kastrat, HttpRoutePlanner rouplan, HttpProcessor httpProcessor, HttpRequestRetryHandler retryHandler, RedirectHandler redirectHandler, AuthenticationHandler targetAuthHandler, AuthenticationHandler proxyAuthHandler, UserTokenHandler userTokenHandler, HttpParams params)

Method Summary

Modifier and Type	Method	Description
protected HttpRequest	createConnectRequest(HttpRoute route, HttpContext context)	Creates the CONNECT request for tunnelling.
protected boolean	createTunnelToProxy(HttpRoute route, int hop, HttpContext context)	Creates a tunnel to an intermediate proxy.
protected boolean	createTunnelToTarget(HttpRoute route, HttpContext context)	Creates a tunnel to the target server.
protected HttpRoute	determineRoute(HttpHost target, HttpRequest request, HttpContext context)	Determines the route for a request.
protected void	establishRoute(HttpRoute route, HttpContext context)	Establishes the target route.
HttpResponse	execute(HttpHost target, HttpRequest request, HttpContext context)	Executes a request.
protected RoutedRequest	handleResponse(RoutedRequest roureq, HttpResponse response, HttpContext context)	Analyzes a response to check need for a followup.
protected void	releaseConnection()	Returns the connection back to the connection manager and prepares for retrieving a new connection during the next request.
protected void	rewriteRequestURI(RequestWrapper request, HttpRoute route)

Methods inherited from class java.lang.Object

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

Field Details

connManager

protected final ClientConnectionManager connManager

The connection manager.

routePlanner

protected final HttpRoutePlanner routePlanner

The route planner.

reuseStrategy

protected final ConnectionReuseStrategy reuseStrategy

The connection re-use strategy.

keepAliveStrategy

protected final ConnectionKeepAliveStrategy keepAliveStrategy

The keep-alive duration strategy.

requestExec

protected final HttpRequestExecutor requestExec

The request executor.

httpProcessor

protected final HttpProcessor httpProcessor

The HTTP protocol processor.

retryHandler

protected final HttpRequestRetryHandler retryHandler

The request retry handler.

redirectHandler

protected final RedirectHandler redirectHandler

The redirect handler.

params

protected final HttpParams params

The HTTP parameters.

managedConn

protected ManagedClientConnection managedConn

The currently allocated connection.

Constructor Details

DefaultRequestDirector

public DefaultRequestDirector(HttpRequestExecutor requestExec,
ClientConnectionManager conman,
ConnectionReuseStrategy reustrat,
ConnectionKeepAliveStrategy kastrat,
HttpRoutePlanner rouplan,
HttpProcessor httpProcessor,
HttpRequestRetryHandler retryHandler,
RedirectHandler redirectHandler,
AuthenticationHandler targetAuthHandler,
AuthenticationHandler proxyAuthHandler,
UserTokenHandler userTokenHandler,
HttpParams params)

Method Details

rewriteRequestURI

protected void rewriteRequestURI(RequestWrapper request,
HttpRoute route)
                          throws ProtocolException

Throws:

ProtocolException

execute

public HttpResponse execute(HttpHost target,
HttpRequest request,
HttpContext context)
                     throws HttpException,
IOException

Description copied from interface: RequestDirector

Executes a request.
Note: For the time being, a new director is instantiated for each request. This is the same behavior as for HttpMethodDirector in HttpClient 3.

Specified by:

execute in interface RequestDirector

Parameters:

target - the target host for the request. Implementations may accept null if they can still determine a route, for example to a default target or by inspecting the request.

request - the request to execute

context - the context for executing the request

Returns:

the final response to the request. This is never an intermediate response with status code 1xx.

Throws:

HttpException - in case of a problem

IOException - in case of an IO problem or if the connection was aborted

releaseConnection

protected void releaseConnection()

Returns the connection back to the connection manager and prepares for retrieving a new connection during the next request.

determineRoute

protected HttpRoute determineRoute(HttpHost target,
HttpRequest request,
HttpContext context)
                            throws HttpException

Determines the route for a request. Called by execute(org.apache.http.HttpHost, org.apache.http.HttpRequest, org.apache.http.protocol.HttpContext) to determine the route for either the original or a followup request.

Parameters:

target - the target host for the request. Implementations may accept null if they can still determine a route, for example to a default target or by inspecting the request.

request - the request to execute

context - the context to use for the execution, never null

Returns:

the route the request should take

Throws:

HttpException - in case of a problem

establishRoute

protected void establishRoute(HttpRoute route,
HttpContext context)
                       throws HttpException,
IOException

Establishes the target route.

Parameters:

route - the route to establish

context - the context for the request execution

Throws:

HttpException - in case of a problem

IOException - in case of an IO problem

createTunnelToTarget

protected boolean createTunnelToTarget(HttpRoute route,
HttpContext context)
                                throws HttpException,
IOException

Creates a tunnel to the target server. The connection must be established to the (last) proxy. A CONNECT request for tunnelling through the proxy will be created and sent, the response received and checked. This method does not update the connection with information about the tunnel, that is left to the caller.

Parameters:

route - the route to establish

context - the context for request execution

Returns:

true if the tunnelled route is secure, false otherwise. The implementation here always returns false, but derived classes may override.

Throws:

HttpException - in case of a problem

IOException - in case of an IO problem

createTunnelToProxy

protected boolean createTunnelToProxy(HttpRoute route,
int hop,
HttpContext context)
                               throws HttpException,
IOException

Creates a tunnel to an intermediate proxy. This method is not implemented in this class. It just throws an exception here.

Parameters:

route - the route to establish

hop - the hop in the route to establish now. route.getHopTarget(hop) will return the proxy to tunnel to.

context - the context for request execution

Returns:

true if the partially tunnelled connection is secure, false otherwise.

Throws:

HttpException - in case of a problem

IOException - in case of an IO problem

createConnectRequest

protected HttpRequest createConnectRequest(HttpRoute route,
HttpContext context)

Creates the CONNECT request for tunnelling. Called by createTunnelToTarget.

Parameters:

route - the route to establish

context - the context for request execution

Returns:

the CONNECT request for tunnelling

handleResponse

protected RoutedRequest handleResponse(RoutedRequest roureq,
HttpResponse response,
HttpContext context)
                                throws HttpException,
IOException

Analyzes a response to check need for a followup.

Parameters:

roureq - the request and route.

response - the response to analayze

context - the context used for the current request execution

Returns:

the followup request and route if there is a followup, or null if the response should be returned as is

Throws:

HttpException - in case of a problem

IOException - in case of an IO problem