org.apache.http.nio.protocol
Class AsyncNHttpServiceHandler

java.lang.Object
  org.apache.http.nio.protocol.NHttpHandlerBase
      org.apache.http.nio.protocol.AsyncNHttpServiceHandler

All Implemented Interfaces:

NHttpServiceHandler

Deprecated. (4.2) use HttpAsyncService

@Deprecated
@Contract(threading=IMMUTABLE_CONDITIONAL)
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.