anon.client
Class AbstractDataChain

java.lang.Object
  anon.client.AbstractDataChain

All Implemented Interfaces:

AnonChannel, java.lang.Runnable, java.util.Observer

Direct Known Subclasses:

SequentialChannelDataChain, SingleChannelDataChain

public abstract class AbstractDataChain
extends java.lang.Object
implements AnonChannel, java.util.Observer, java.lang.Runnable

Author:

Stefan Lieske

Nested Class Summary

private class	AbstractDataChain.DataChainInputStreamImplementation
private class	AbstractDataChain.DataChainOutputStreamImplementation

Field Summary

private boolean	m_chainClosed
private IDataChannelCreator	m_channelCreator
private java.lang.Thread	m_downstreamThread
private DataChainErrorListener	m_errorListener
private AbstractDataChain.DataChainInputStreamImplementation	m_inputStream
private java.util.Vector	m_messageQueuesNotifications
private AbstractDataChain.DataChainOutputStreamImplementation	m_outputStream

Fields inherited from interface anon.AnonChannel

HTTP, SMTP, SOCKS

Constructor Summary

AbstractDataChain(IDataChannelCreator a_channelCreator, DataChainErrorListener a_errorListener)

Method Summary

protected void	addInputStreamQueueEntry(DataChainInputStreamQueueEntry a_entry)
void	close() Closes the channel and releases all resources used.
protected abstract void	closeDataChain()
protected AbstractDataChannel	createDataChannel()
abstract void	createPacketPayload(DataChainSendOrderStructure a_order)
java.io.InputStream	getInputStream() The returned InputStream could be used to receive data.
protected java.util.Vector	getMessageQueuesNotificationsList()
abstract int	getOutputBlockSize() Returns a value that indicates the current optimum size of data to write..
java.io.OutputStream	getOutputStream() The returned OutputStream could be used to send data.
protected void	interruptDownstreamThread()
protected abstract void	orderPacket(DataChainSendOrderStructure a_order)
protected abstract void	outputStreamClosed()
protected void	propagateConnectionError()
abstract void	run()
void	update(java.util.Observable a_observedObject, java.lang.Object a_message)

Methods inherited from class java.lang.Object

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

Field Detail

m_inputStream

private AbstractDataChain.DataChainInputStreamImplementation m_inputStream

m_outputStream

private AbstractDataChain.DataChainOutputStreamImplementation m_outputStream

m_messageQueuesNotifications

private java.util.Vector m_messageQueuesNotifications

m_channelCreator

private IDataChannelCreator m_channelCreator

m_errorListener

private DataChainErrorListener m_errorListener

m_chainClosed

private boolean m_chainClosed

m_downstreamThread

private java.lang.Thread m_downstreamThread

Constructor Detail

AbstractDataChain

public AbstractDataChain(IDataChannelCreator a_channelCreator,
                         DataChainErrorListener a_errorListener)

Method Detail

getInputStream

public java.io.InputStream getInputStream()

Description copied from interface: AnonChannel

The returned InputStream could be used to receive data.

Specified by:

getInputStream in interface AnonChannel

Returns:

InputStream, useful for receiving data

getOutputStream

public java.io.OutputStream getOutputStream()

Description copied from interface: AnonChannel

The returned OutputStream could be used to send data.

Specified by:

getOutputStream in interface AnonChannel

Returns:

OutputStream, useful for sending data

close

public void close()

Description copied from interface: AnonChannel

Closes the channel and releases all resources used.

Specified by:

close in interface AnonChannel

update

public void update(java.util.Observable a_observedObject,
                   java.lang.Object a_message)

Specified by:

update in interface java.util.Observer

getMessageQueuesNotificationsList

protected java.util.Vector getMessageQueuesNotificationsList()

addInputStreamQueueEntry

protected void addInputStreamQueueEntry(DataChainInputStreamQueueEntry a_entry)

createDataChannel

protected AbstractDataChannel createDataChannel()

interruptDownstreamThread

protected void interruptDownstreamThread()

propagateConnectionError

protected void propagateConnectionError()

getOutputBlockSize

public abstract int getOutputBlockSize()

Description copied from interface: AnonChannel

Returns a value that indicates the current optimum size of data to write.. Because often anon services transport the data splited into packets for optimum performance it may be good to send data according to the packet size to avoid unneccessary overheads.

Specified by:

getOutputBlockSize in interface AnonChannel

Returns:

the current optimum size for output data. If 1 is returned the size does not matter.

createPacketPayload

public abstract void createPacketPayload(DataChainSendOrderStructure a_order)

run

public abstract void run()

Specified by:

run in interface java.lang.Runnable

orderPacket

protected abstract void orderPacket(DataChainSendOrderStructure a_order)

outputStreamClosed

protected abstract void outputStreamClosed()
                                    throws java.io.IOException

Throws:

java.io.IOException

closeDataChain

protected abstract void closeDataChain()