examples.transfer
Class DataTransferAgent

java.lang.Object
  examples.transfer.DataTransferAgent

All Implemented Interfaces:

Runnable, Serializable

public class DataTransferAgent

extends Object

implements Runnable, Serializable

The agent's purpose is migrate data from one host to another. This is done by means of a special service. The agent accesses a IOStreamService at a well known name and waits for data transmission. The received stream (propably from a file) is stored in the agent's corpus. Then the agent migrates to a host given at command line and finally pipes the data back to IOStreamService at the destination host.

Version:

"$Id: DataTransferAgent.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Ulrich Pinsdorf

See Also:

Serialized Form

Field Summary

int	BUFSIZE Size of the read/write buffer.
String	FILENAME Filename which specifies the file in the agent's corpus where the file to be transported is stored.
String	SERVICENAME The path name where the IOService is published in the server environment.

Constructor Summary

DataTransferAgent()
Constructor.

Method Summary

void	run() Performs the agent's job.

Methods inherited from class java.lang.Object

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

Field Detail

FILENAME

public final String FILENAME

Filename which specifies the file in the agent's corpus where the file to be transported is stored. Due to the security architecture this has to be in the mutable part of the agent.

SERVICENAME

public final String SERVICENAME

The path name where the IOService is published in the server environment. This variable has to be set at the service provider accordingly.

BUFSIZE

public final int BUFSIZE

Size of the read/write buffer.

See Also:

Constant Field Values

Constructor Detail

DataTransferAgent

public DataTransferAgent()

Constructor. This is called only once in the agent's lifetime.

Method Detail

run

public void run()

Performs the agent's job. This method is called after each agent startup, e.g. after every migration. The agent's lifecycle is as follows:

• retrieve the IOStreamService from server environment
• check if we already carry data (from the origin)
• b) if not: GET data by means of the service and migrate to the specified host
• a) if so : PUT data by means of the service and terminate

Specified by:

run in interface Runnable