org.apache.http.nio
Interface NHttpServerEventHandler

All Known Implementing Classes:
HttpAsyncService

public interface NHttpServerEventHandler

Abstract server-side HTTP event handler.

Since:
4.2

Method Summary
 void closed(NHttpServerConnection conn)
          Triggered when the connection is closed.
 void connected(NHttpServerConnection conn)
          Triggered when a new incoming connection is created.
 void endOfInput(NHttpServerConnection conn)
          Triggered when the connection is closed by the opposite end point (half-closed).
 void exception(NHttpServerConnection conn, Exception ex)
          Triggered if an error occurs during the HTTP exchange.
 void inputReady(NHttpServerConnection conn, ContentDecoder decoder)
          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)
          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)
          Triggered when a new HTTP request is received.
 void responseReady(NHttpServerConnection conn)
          Triggered when the connection is ready to accept a new HTTP response.
 void timeout(NHttpServerConnection conn)
          Triggered when no input is detected on this connection over the maximum period of inactivity.
 

Method Detail

connected

void connected(NHttpServerConnection conn)
               throws IOException,
                      HttpException
Triggered when a new incoming connection is created.

Parameters:
conn - new incoming connection HTTP connection.
Throws:
IOException
HttpException

requestReceived

void requestReceived(NHttpServerConnection conn)
                     throws IOException,
                            HttpException
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 inputReady(NHttpServerConnection, ContentDecoder) calls to transfer the request content.

Parameters:
conn - HTTP connection that contains a new HTTP request
Throws:
IOException
HttpException
See Also:
NHttpServerConnection

inputReady

void inputReady(NHttpServerConnection conn,
                ContentDecoder decoder)
                throws IOException,
                       HttpException
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 incoming content, input event notifications can be temporarily suspended using IOControl interface (super interface of NHttpServerConnection).

Please note that the NHttpServerConnection and ContentDecoder objects are not thread-safe and should only be used within the context of this method call. The IOControl object can be shared and used on other thread to resume input event notifications when the handler is capable of processing more content.

Parameters:
conn - HTTP connection that can produce a new portion of the incoming request content.
decoder - The content decoder to use to read content.
Throws:
IOException
HttpException
See Also:
NHttpServerConnection, ContentDecoder, IOControl

responseReady

void responseReady(NHttpServerConnection conn)
                   throws IOException,
                          HttpException
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.

Parameters:
conn - HTTP connection that contains an HTTP response
Throws:
IOException
HttpException
See Also:
NHttpServerConnection

outputReady

void outputReady(NHttpServerConnection conn,
                 ContentEncoder encoder)
                 throws IOException,
                        HttpException
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 outgoing content, output event notifications can be temporarily suspended using IOControl interface (super interface of NHttpServerConnection).

Please note that the NHttpServerConnection and ContentEncoder objects are not thread-safe and should only be used within the context of this method call. The IOControl object can be shared and used on other thread to resume output event notifications when more content is made available.

Parameters:
conn - HTTP connection that can accommodate a new portion of the outgoing response content.
encoder - The content encoder to use to write content.
Throws:
IOException
HttpException
See Also:
NHttpServerConnection, ContentEncoder, IOControl

endOfInput

void endOfInput(NHttpServerConnection conn)
                throws IOException
Triggered when the connection is closed by the opposite end point (half-closed).

Parameters:
conn - half-closed HTTP connection.
Throws:
IOException

timeout

void timeout(NHttpServerConnection conn)
             throws IOException
Triggered when no input is detected on this connection over the maximum period of inactivity.

Parameters:
conn - HTTP connection that caused timeout condition.
Throws:
IOException

closed

void closed(NHttpServerConnection conn)
Triggered when the connection is closed.

Parameters:
conn - closed HTTP connection.

exception

void exception(NHttpServerConnection conn,
               Exception ex)
Triggered if an error occurs during the HTTP exchange.

Parameters:
conn - HTTP connection that caused an I/O error
ex - exception


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