org.apache.http.impl.nio
Class NHttpConnectionBase

java.lang.Object
  org.apache.http.impl.nio.NHttpConnectionBase

All Implemented Interfaces:

Closeable, HttpConnection, HttpInetConnection, IOControl, NHttpConnection, SessionBufferStatus, SocketAccessor

Direct Known Subclasses:

DefaultNHttpClientConnection, DefaultNHttpServerConnection

@NotThreadSafe
public class NHttpConnectionBase
extends Object
implements NHttpConnection, HttpInetConnection, SessionBufferStatus, SocketAccessor

This class serves as a base for all NHttpConnection implementations and implements functionality common to both client and server HTTP connections.

The following parameters can be used to customize the behavior of this class:

• CoreProtocolPNames.HTTP_ELEMENT_CHARSET
• CoreConnectionPNames.SOCKET_BUFFER_SIZE

Since:

4.0

Field Summary

protected HttpConnectionMetricsImpl	connMetrics
protected ContentDecoder	contentDecoder
protected ContentEncoder	contentEncoder
protected HttpContext	context
protected boolean	hasBufferedInput
protected boolean	hasBufferedOutput
protected SessionInputBufferImpl	inbuf
protected ContentLengthStrategy	incomingContentStrategy
protected HttpTransportMetricsImpl	inTransportMetrics
protected SessionOutputBufferImpl	outbuf
protected ContentLengthStrategy	outgoingContentStrategy
protected HttpTransportMetricsImpl	outTransportMetrics
protected SocketAddress	remote
protected HttpRequest	request
protected HttpResponse	response
protected IOSession	session
protected int	status

Fields inherited from interface org.apache.http.nio.NHttpConnection

ACTIVE, CLOSED, CLOSING

Constructor Summary

NHttpConnectionBase(IOSession session, ByteBufferAllocator allocator, HttpParams params)
Creates a new instance of this class given the underlying I/O session.

Method Summary

protected void	assertNotClosed() Assets if the connection is still open.
protected void	bind(IOSession session) Binds the connection to a different IOSession.
void	close()
protected HttpConnectionMetricsImpl	createConnectionMetrics(HttpTransportMetrics inTransportMetric, HttpTransportMetrics outTransportMetric)
protected ContentDecoder	createContentDecoder(long len, ReadableByteChannel channel, SessionInputBuffer buffer, HttpTransportMetricsImpl metrics) Factory method for ContentDecoder instances.
protected ContentEncoder	createContentEncoder(long len, WritableByteChannel channel, SessionOutputBuffer buffer, HttpTransportMetricsImpl metrics) Factory method for ContentEncoder instances.
protected ContentLengthStrategy	createIncomingContentStrategy()
protected ContentLengthStrategy	createOutgoingContentStrategy()
protected HttpTransportMetricsImpl	createTransportMetrics()
HttpContext	getContext() Returns an HTTP execution context associated with this connection.
HttpRequest	getHttpRequest() Returns the current HTTP request if one is being received / transmitted.
HttpResponse	getHttpResponse() Returns the current HTTP response if one is being received / transmitted.
InetAddress	getLocalAddress()
int	getLocalPort()
HttpConnectionMetrics	getMetrics()
InetAddress	getRemoteAddress()
int	getRemotePort()
Socket	getSocket() Return the underlying socket
int	getSocketTimeout()
int	getStatus() Returns status of the connection:
boolean	hasBufferedInput() Determines if the session input buffer contains data.
boolean	hasBufferedOutput() Determines if the session output buffer contains data.
boolean	isOpen()
boolean	isStale()
protected HttpEntity	prepareDecoder(HttpMessage message) Initializes a specific ContentDecoder implementation based on the properties of the given HttpMessage and generates an instance of HttpEntity matching the properties of the content decoder.
protected void	prepareEncoder(HttpMessage message) Initializes a specific ContentEncoder implementation based on the properties of the given HttpMessage.
void	requestInput() Requests event notifications to be triggered when the underlying channel is ready for input operations.
void	requestOutput() Requests event notifications to be triggered when the underlying channel is ready for output operations.
void	setSocketTimeout(int timeout)
void	shutdown() Shuts down the underlying channel.
void	suspendInput() Suspends event notifications about the underlying channel being ready for input operations.
void	suspendOutput() Suspends event notifications about the underlying channel being ready for output operations.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

incomingContentStrategy

protected final ContentLengthStrategy incomingContentStrategy

outgoingContentStrategy

protected final ContentLengthStrategy outgoingContentStrategy

inbuf

protected final SessionInputBufferImpl inbuf

outbuf

protected final SessionOutputBufferImpl outbuf

inTransportMetrics

protected final HttpTransportMetricsImpl inTransportMetrics

outTransportMetrics

protected final HttpTransportMetricsImpl outTransportMetrics

connMetrics

protected final HttpConnectionMetricsImpl connMetrics

context

protected HttpContext context

session

protected IOSession session

remote

protected SocketAddress remote

contentDecoder

protected volatile ContentDecoder contentDecoder

hasBufferedInput

protected volatile boolean hasBufferedInput

contentEncoder

protected volatile ContentEncoder contentEncoder

hasBufferedOutput

protected volatile boolean hasBufferedOutput

request

protected volatile HttpRequest request

response

protected volatile HttpResponse response

status

protected volatile int status

Constructor Detail

NHttpConnectionBase

public NHttpConnectionBase(IOSession session,
                           ByteBufferAllocator allocator,
                           HttpParams params)

Creates a new instance of this class given the underlying I/O session.

Parameters:

session - the underlying I/O session.

allocator - byte buffer allocator.

params - HTTP parameters.

Method Detail

bind

protected void bind(IOSession session)

Binds the connection to a different IOSession. This may be necessary when the underlying I/O session gets upgraded with SSL/TLS encryption.

Since:

4.2

createIncomingContentStrategy

protected ContentLengthStrategy createIncomingContentStrategy()

Since:

4.2

createOutgoingContentStrategy

protected ContentLengthStrategy createOutgoingContentStrategy()

Since:

4.2

createTransportMetrics

protected HttpTransportMetricsImpl createTransportMetrics()

Since:

4.1

createConnectionMetrics

protected HttpConnectionMetricsImpl createConnectionMetrics(HttpTransportMetrics inTransportMetric,
                                                            HttpTransportMetrics outTransportMetric)

Since:

4.1

getStatus

public int getStatus()

Description copied from interface: NHttpConnection

Returns status of the connection:

NHttpConnection.ACTIVE: connection is active.

NHttpConnection.CLOSING: connection is being closed.

NHttpConnection.CLOSED: connection has been closed.

Specified by:

getStatus in interface NHttpConnection

Returns:

connection status.

getContext

public HttpContext getContext()

Description copied from interface: NHttpConnection

Returns an HTTP execution context associated with this connection.

Specified by:

getContext in interface NHttpConnection

Returns:

HTTP context

getHttpRequest

public HttpRequest getHttpRequest()

Description copied from interface: NHttpConnection

Returns the current HTTP request if one is being received / transmitted. Otherwise returns null.

Specified by:

getHttpRequest in interface NHttpConnection

Returns:

HTTP request, if available, null otherwise.

getHttpResponse

public HttpResponse getHttpResponse()

Description copied from interface: NHttpConnection

Returns the current HTTP response if one is being received / transmitted. Otherwise returns null.

Specified by:

getHttpResponse in interface NHttpConnection

Returns:

HTTP response, if available, null otherwise.

requestInput

public void requestInput()

Description copied from interface: IOControl

Requests event notifications to be triggered when the underlying channel is ready for input operations.

Specified by:

requestInput in interface IOControl

requestOutput

public void requestOutput()

Description copied from interface: IOControl

Requests event notifications to be triggered when the underlying channel is ready for output operations.

Specified by:

requestOutput in interface IOControl

suspendInput

public void suspendInput()

Description copied from interface: IOControl

Suspends event notifications about the underlying channel being ready for input operations.

Specified by:

suspendInput in interface IOControl

suspendOutput

public void suspendOutput()

Description copied from interface: IOControl

Suspends event notifications about the underlying channel being ready for output operations.

Specified by:

suspendOutput in interface IOControl

prepareDecoder

protected HttpEntity prepareDecoder(HttpMessage message)
                             throws HttpException

Initializes a specific ContentDecoder implementation based on the properties of the given HttpMessage and generates an instance of HttpEntity matching the properties of the content decoder.

Parameters:

message - the HTTP message.

Returns:

HTTP entity.

Throws:

HttpException - in case of an HTTP protocol violation.

createContentDecoder

protected ContentDecoder createContentDecoder(long len,
                                              ReadableByteChannel channel,
                                              SessionInputBuffer buffer,
                                              HttpTransportMetricsImpl metrics)

Factory method for ContentDecoder instances.

Parameters:

len - content length, if known, ContentLengthStrategy.CHUNKED or ContentLengthStrategy.IDENTITY, if unknown.

channel - the session channel.

buffer - the session buffer.

metrics - transport metrics.

Returns:

content decoder.

Since:

4.1

prepareEncoder

protected void prepareEncoder(HttpMessage message)
                       throws HttpException

Initializes a specific ContentEncoder implementation based on the properties of the given HttpMessage.

Parameters:

message - the HTTP message.

Throws:

HttpException - in case of an HTTP protocol violation.

createContentEncoder

protected ContentEncoder createContentEncoder(long len,
                                              WritableByteChannel channel,
                                              SessionOutputBuffer buffer,
                                              HttpTransportMetricsImpl metrics)

Factory method for ContentEncoder instances.

Parameters:

len - content length, if known, ContentLengthStrategy.CHUNKED or ContentLengthStrategy.IDENTITY, if unknown.

channel - the session channel.

buffer - the session buffer.

metrics - transport metrics.

Returns:

content encoder.

Since:

4.1

hasBufferedInput

public boolean hasBufferedInput()

Description copied from interface: SessionBufferStatus

Determines if the session input buffer contains data.

Specified by:

hasBufferedInput in interface SessionBufferStatus

Returns:

true if the session input buffer contains data, false otherwise.

hasBufferedOutput

public boolean hasBufferedOutput()

Description copied from interface: SessionBufferStatus

Determines if the session output buffer contains data.

Specified by:

hasBufferedOutput in interface SessionBufferStatus

Returns:

true if the session output buffer contains data, false otherwise.

assertNotClosed

protected void assertNotClosed()
                        throws ConnectionClosedException

Assets if the connection is still open.

Throws:

ConnectionClosedException - in case the connection has already been closed.

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface HttpConnection

Throws:

IOException

isOpen

public boolean isOpen()

Specified by:

isOpen in interface HttpConnection

isStale

public boolean isStale()

Specified by:

isStale in interface HttpConnection

getLocalAddress

public InetAddress getLocalAddress()

Specified by:

getLocalAddress in interface HttpInetConnection

getLocalPort

public int getLocalPort()

Specified by:

getLocalPort in interface HttpInetConnection

getRemoteAddress

public InetAddress getRemoteAddress()

Specified by:

getRemoteAddress in interface HttpInetConnection

getRemotePort

public int getRemotePort()

Specified by:

getRemotePort in interface HttpInetConnection

setSocketTimeout

public void setSocketTimeout(int timeout)

Specified by:

setSocketTimeout in interface HttpConnection

getSocketTimeout

public int getSocketTimeout()

Specified by:

getSocketTimeout in interface HttpConnection

shutdown

public void shutdown()
              throws IOException

Description copied from interface: IOControl

Shuts down the underlying channel.

Specified by:

shutdown in interface HttpConnection

Specified by:

shutdown in interface IOControl

Throws:

IOException

getMetrics

public HttpConnectionMetrics getMetrics()

Specified by:

getMetrics in interface HttpConnection

toString

public String toString()

Overrides:

toString in class Object

getSocket

public Socket getSocket()

Description copied from interface: SocketAccessor

Return the underlying socket

Specified by:

getSocket in interface SocketAccessor

Returns:

- the underlying Socket, may be null.