org.apache.http.nio.protocol
Class AsyncNHttpServiceHandler

java.lang.Object
  extended by org.apache.http.nio.protocol.NHttpHandlerBase
      extended by org.apache.http.nio.protocol.AsyncNHttpServiceHandler
All Implemented Interfaces:
NHttpServiceHandler

Deprecated. (4.2) use HttpAsyncService

@Deprecated
@Immutable
public class AsyncNHttpServiceHandler
extends NHttpHandlerBase
implements NHttpServiceHandler

Fully asynchronous HTTP server side protocol handler implementation that implements the essential requirements of the HTTP protocol for the server side message processing as described by RFC 2616. It is capable of processing HTTP requests with nearly constant memory footprint. Only HTTP message heads are stored in memory, while content of message bodies is streamed directly from the entity to the underlying channel (and vice versa) ConsumingNHttpEntity and ProducingNHttpEntity interfaces.

When using this class, it is important to ensure that entities supplied for writing implement ProducingNHttpEntity. Doing so will allow the entity to be written out asynchronously. If entities supplied for writing do not implement ProducingNHttpEntity, a delegate is added that buffers the entire contents in memory. Additionally, the buffering might take place in the I/O thread, which could cause I/O to block temporarily. For best results, ensure that all entities set on HttpResponses from NHttpRequestHandlers implement ProducingNHttpEntity.

If incoming requests enclose a content entity, NHttpRequestHandlers are expected to return a ConsumingNHttpEntity for reading the content. After the entity is finished reading the data, NHttpRequestHandler.handle(HttpRequest, HttpResponse, NHttpResponseTrigger, HttpContext) is called to generate a response.

Individual NHttpRequestHandlers do not have to submit a response immediately. They can defer transmission of the HTTP response back to the client without blocking the I/O thread and to delegate the processing the HTTP request to a worker thread. The worker thread in its turn can use an instance of NHttpResponseTrigger passed as a parameter to submit a response as at a later point of time once the response becomes available.

Since:
4.0

Nested Class Summary
protected static class AsyncNHttpServiceHandler.ServerConnState
          Deprecated.  
 
Field Summary
protected  HttpExpectationVerifier expectationVerifier
          Deprecated.  
protected  NHttpRequestHandlerResolver handlerResolver
          Deprecated.  
protected  HttpResponseFactory responseFactory
          Deprecated.  
 
Fields inherited from class org.apache.http.nio.protocol.NHttpHandlerBase
allocator, CONN_STATE, connStrategy, eventListener, httpProcessor, params
 
Constructor Summary
AsyncNHttpServiceHandler(HttpProcessor httpProcessor, HttpResponseFactory responseFactory, ConnectionReuseStrategy connStrategy, ByteBufferAllocator allocator, HttpParams params)
          Deprecated.  
AsyncNHttpServiceHandler(HttpProcessor httpProcessor, HttpResponseFactory responseFactory, ConnectionReuseStrategy connStrategy, HttpParams params)
          Deprecated.  
 
Method Summary
 void closed(NHttpServerConnection conn)
          Deprecated. Triggered when the connection is closed.
 void connected(NHttpServerConnection conn)
          Deprecated. Triggered when a new incoming connection is created.
 void exception(NHttpServerConnection conn, HttpException httpex)
          Deprecated. Triggered when an HTTP protocol violation occurs while receiving an HTTP request.
 void exception(NHttpServerConnection conn, IOException ex)
          Deprecated. Triggered when an I/O error occurs while reading from or writing to the underlying channel.
 void inputReady(NHttpServerConnection conn, ContentDecoder decoder)
          Deprecated. Triggered when the underlying channel is ready for reading a new portion of the request entity through the corresponding content decoder.
 void outputReady(NHttpServerConnection conn, ContentEncoder encoder)
          Deprecated. Triggered when the underlying channel is ready for writing a next portion of the response entity through the corresponding content encoder.
 void requestReceived(NHttpServerConnection conn)
          Deprecated. Triggered when a new HTTP request is received.
protected  void responseComplete(HttpResponse response, HttpContext context)
          Deprecated. Signals that this response has been fully sent.
 void responseReady(NHttpServerConnection conn)
          Deprecated. Triggered when the connection is ready to accept a new HTTP response.
 void setExpectationVerifier(HttpExpectationVerifier expectationVerifier)
          Deprecated.  
 void setHandlerResolver(NHttpRequestHandlerResolver handlerResolver)
          Deprecated.  
 void timeout(NHttpServerConnection conn)
          Deprecated. Triggered when no input is detected on this connection over the maximum period of inactivity.
 
Methods inherited from class org.apache.http.nio.protocol.NHttpHandlerBase
canResponseHaveBody, closeConnection, getParams, handleTimeout, setEventListener, shutdownConnection
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

responseFactory

protected final HttpResponseFactory responseFactory
Deprecated. 

handlerResolver

protected NHttpRequestHandlerResolver handlerResolver
Deprecated. 

expectationVerifier

protected HttpExpectationVerifier expectationVerifier
Deprecated. 
Constructor Detail

AsyncNHttpServiceHandler

public AsyncNHttpServiceHandler(HttpProcessor httpProcessor,
                                HttpResponseFactory responseFactory,
                                ConnectionReuseStrategy connStrategy,
                                ByteBufferAllocator allocator,
                                HttpParams params)
Deprecated. 

AsyncNHttpServiceHandler

public AsyncNHttpServiceHandler(HttpProcessor httpProcessor,
                                HttpResponseFactory responseFactory,
                                ConnectionReuseStrategy connStrategy,
                                HttpParams params)
Deprecated. 
Method Detail

setExpectationVerifier

public void setExpectationVerifier(HttpExpectationVerifier expectationVerifier)
Deprecated. 

setHandlerResolver

public void setHandlerResolver(NHttpRequestHandlerResolver handlerResolver)
Deprecated. 

connected

public void connected(NHttpServerConnection conn)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when a new incoming connection is created.

Specified by:
connected in interface NHttpServiceHandler
Parameters:
conn - new incoming connection HTTP connection.

requestReceived

public void requestReceived(NHttpServerConnection conn)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when a new HTTP request is received. The connection passed as a parameter to this method is guaranteed to return a valid HTTP request object.

If the request received encloses a request entity this method will be followed a series of NHttpServiceHandler.inputReady(NHttpServerConnection, ContentDecoder) calls to transfer the request content.

Specified by:
requestReceived in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that contains a new HTTP request
See Also:
NHttpServerConnection

closed

public void closed(NHttpServerConnection conn)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when the connection is closed.

Specified by:
closed in interface NHttpServiceHandler
Parameters:
conn - closed HTTP connection.

exception

public void exception(NHttpServerConnection conn,
                      HttpException httpex)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when an HTTP protocol violation occurs while receiving an HTTP request.

Specified by:
exception in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that caused an HTTP protocol violation
httpex - HTTP protocol violation exception

exception

public void exception(NHttpServerConnection conn,
                      IOException ex)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when an I/O error occurs while reading from or writing to the underlying channel.

Specified by:
exception in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that caused an I/O error
ex - I/O exception

timeout

public void timeout(NHttpServerConnection conn)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when no input is detected on this connection over the maximum period of inactivity.

Specified by:
timeout in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that caused timeout condition.

inputReady

public void inputReady(NHttpServerConnection conn,
                       ContentDecoder decoder)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when the underlying channel is ready for reading a new portion of the request entity through the corresponding content decoder.

If the content consumer is unable to process the incoming content, input event notifications can be temporarily suspended using IOControl interface.

Specified by:
inputReady in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that can produce a new portion of the incoming request content.
decoder - The content decoder to use to read content.
See Also:
NHttpServerConnection, ContentDecoder, IOControl

responseReady

public void responseReady(NHttpServerConnection conn)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when the connection is ready to accept a new HTTP response. The protocol handler does not have to submit a response if it is not ready.

Specified by:
responseReady in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that contains an HTTP response
See Also:
NHttpServerConnection

outputReady

public void outputReady(NHttpServerConnection conn,
                        ContentEncoder encoder)
Deprecated. 
Description copied from interface: NHttpServiceHandler
Triggered when the underlying channel is ready for writing a next portion of the response entity through the corresponding content encoder.

If the content producer is unable to generate the outgoing content, output event notifications can be temporarily suspended using IOControl interface.

Specified by:
outputReady in interface NHttpServiceHandler
Parameters:
conn - HTTP connection that can accommodate a new portion of the outgoing response content.
encoder - The content encoder to use to write content.
See Also:
NHttpServerConnection, ContentEncoder, IOControl

responseComplete

protected void responseComplete(HttpResponse response,
                                HttpContext context)
Deprecated. 
Signals that this response has been fully sent. This will be called after submitting the response to a connection, if there is no entity in the response. If there is an entity, it will be called after the entity has completed.



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