org.simpleframework.transport

Class TransportChannel

java.lang.Object

org.simpleframework.transport.TransportChannel

All Implemented Interfaces:

Channel

public class TransportChannel
extends Object
implements Channel

The TransportChannel provides a means to deliver and receive content over a transport. This essentially provides two adapters which enable simpler communication with the underlying transport. They hide the complexities involved with buffering and resetting data written to and read from the socket.

Author:

Niall Gallagher

See Also:

TransportProcessor

Constructor Summary

Constructors

Constructor and Description
TransportChannel(Transport transport) Constructor for the TransportChannel object.

Method Summary

Modifier and Type	Method and Description
void	close() Because the channel represents a duplex means of communication there needs to be a means to close it down.
Map	getAttributes() This returns the Map of attributes used to hold connection information for the channel.
Certificate	getCertificate() This is used to acquire the SSL certificate used for security.
ByteCursor	getCursor() This provides a ByteCursor for this channel.
SocketChannel	getSocket() This is the connected socket channel associated with this.
Trace	getTrace() This gets the Trace object associated with the channel.
ByteWriter	getWriter() This provides a ByteWriter for the channel.
boolean	isSecure() This is used to determine if the channel is secure and that data read from and data written to the request is encrypted.

Methods inherited from class java.lang.Object

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

Constructor Detail

TransportChannel

public TransportChannel(Transport transport)
                 throws IOException

Constructor for the TransportChannel object. The transport channel basically wraps a channel and provides a means to send and receive data using specialized adapters. These adapters provide a simpler means for communicating over the network to the connected client.

Parameters:

transport - this is the underlying transport to be used

Throws:

IOException

Method Detail

isSecure

public boolean isSecure()

This is used to determine if the channel is secure and that data read from and data written to the request is encrypted. Channels transferred over SSL are considered secure and will have this return true, otherwise it will return false.

Specified by:

isSecure in interface Channel

Returns:

true if this is secure for reading and writing

getCertificate

public Certificate getCertificate()

This is used to acquire the SSL certificate used for security. If the socket is connected to an SSL transport this returns an SSL certificate which was provided during the secure handshake between the client and server. If not certificates are present in the provided instance, a challenge can be issued.

Specified by:

getCertificate in interface Channel

Returns:

the SSL certificate provided by a secure transport

getTrace

public Trace getTrace()

This gets the Trace object associated with the channel. The trace is used to log various events for the life of the transaction such as low level read and write events as well as milestone events and errors.

Specified by:

getTrace in interface Channel

Returns:

this returns the trace associated with the socket

getSocket

public SocketChannel getSocket()

This is the connected socket channel associated with this. In order to determine if content can be read or written to or from the channel this socket can be used with a selector. This provides a means to react to I/O events as they occur rather than polling the channel which is generally less performant.

Specified by:

getSocket in interface Channel

Returns:

this returns the connected socket channel

getAttributes

public Map getAttributes()

This returns the Map of attributes used to hold connection information for the channel. The attributes here are taken from the pipeline attributes and may contain details such as SSL certificates or other such useful information.

Specified by:

getAttributes in interface Channel

Returns:

returns the attributes associated with the channel

getCursor

public ByteCursor getCursor()

This provides a ByteCursor for this channel. The cursor provides a seekable view of the input buffer and will allow the server kernel to peek into the input buffer without having to take the data from the input. This allows overflow to be pushed back on to the cursor for subsequent reads.

Specified by:

getCursor in interface Channel

Returns:

this returns the input cursor for the channel

getWriter

public ByteWriter getWriter()

This provides a ByteWriter for the channel. This is used to provide a blocking output mechanism for the channel. Enabling blocking reads ensures that output buffering can be limited to an extent, which ensures that memory remains low at high load periods. Writes to the sender may result in the data being copied and queued until the socket is write ready.

Specified by:

getWriter in interface Channel

Returns:

this returns the output sender for this channel

close

public void close()

Because the channel represents a duplex means of communication there needs to be a means to close it down. This provides such a means. By closing the channel the cursor and sender will no longer send or receive data to or from the network. The client will also be signalled that the connection has been severed.

Specified by:

close in interface Channel