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 * distributed with this work for additional information
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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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package org.apache.http.nio;

import java.io.IOException;

import org.apache.http.HttpException;

Abstract server-side HTTP protocol handler.
Since:
4.0
Deprecated:
(4.2) use NHttpServerEventHandler/**
 * Abstract server-side HTTP protocol handler.
 *
 * @since 4.0
 *
 * @deprecated (4.2) use {@link NHttpServerEventHandler}
 */
@Deprecated
public interface NHttpServiceHandler {

    
Triggered when a new incoming connection is created.
Params:
conn – new incoming connection HTTP connection./**
     * Triggered when a new incoming connection is created.
     *
     * @param conn new incoming connection HTTP connection.
     */
    void connected(NHttpServerConnection conn);

    
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. 
Params:
conn – HTTP connection that contains a new HTTP request
See Also:
NHttpServerConnection/**
     * 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.
     * <p>
     * If the request received encloses a request entity this method will
     * be followed a series of
     * {@link #inputReady(NHttpServerConnection, ContentDecoder)} calls
     * to transfer the request content.
     *
     * @see NHttpServerConnection
     *
     * @param conn HTTP connection that contains a new HTTP request
     */
    void requestReceived(NHttpServerConnection conn);

    
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. 
Params:
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/**
     * Triggered when the underlying channel is ready for reading a
     * new portion of the request entity through the corresponding
     * content decoder.
     * <p>
     * If the content consumer is unable to process the incoming content,
     * input event notifications can be temporarily suspended using
     * {@link IOControl} interface.
     *
     * @see NHttpServerConnection
     * @see ContentDecoder
     * @see IOControl
     *
     * @param conn HTTP connection that can produce a new portion of the
     * incoming request content.
     * @param decoder The content decoder to use to read content.
     */
    void inputReady(NHttpServerConnection conn, ContentDecoder decoder);

    
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.
Params:
conn – HTTP connection that contains an HTTP response
See Also:
NHttpServerConnection/**
     * 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.
     *
     * @see NHttpServerConnection
     *
     * @param conn HTTP connection that contains an HTTP response
     */
    void responseReady(NHttpServerConnection conn);

    
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. 
Params:
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/**
     * Triggered when the underlying channel is ready for writing a
     * next portion of the response entity through the corresponding
     * content encoder.
     * <p>
     * If the content producer is unable to generate the outgoing content,
     * output event notifications can be temporarily suspended using
     * {@link IOControl} interface.
     *
     * @see NHttpServerConnection
     * @see ContentEncoder
     * @see IOControl
     *
     * @param conn HTTP connection that can accommodate a new portion
     * of the outgoing response content.
     * @param encoder The content encoder to use to write content.
     */
    void outputReady(NHttpServerConnection conn, ContentEncoder encoder);

    
Triggered when an I/O error occurs while reading from or writing
to the underlying channel.
Params:
conn – HTTP connection that caused an I/O error
ex – I/O exception/**
     * Triggered when an I/O error occurs while reading from or writing
     * to the underlying channel.
     *
     * @param conn HTTP connection that caused an I/O error
     * @param ex I/O exception
     */
    void exception(NHttpServerConnection conn, IOException ex);

    
Triggered when an HTTP protocol violation occurs while receiving
an HTTP request.
Params:
conn – HTTP connection that caused an HTTP protocol violation
ex – HTTP protocol violation exception/**
     * Triggered when an HTTP protocol violation occurs while receiving
     * an HTTP request.
     *
     * @param conn HTTP connection that caused an HTTP protocol violation
     * @param ex HTTP protocol violation exception
     */
    void exception(NHttpServerConnection conn, HttpException ex);

    
Triggered when no input is detected on this connection over the
maximum period of inactivity.
Params:
conn – HTTP connection that caused timeout condition./**
     * Triggered when no input is detected on this connection over the
     * maximum period of inactivity.
     *
     * @param conn HTTP connection that caused timeout condition.
     */
    void timeout(NHttpServerConnection conn);

    
Triggered when the connection is closed.
Params:
conn – closed HTTP connection./**
     * Triggered when the connection is closed.
     *
     * @param conn closed HTTP connection.
     */
    void closed(NHttpServerConnection conn);

}