Package weka.experiment

Class RemoteEngine

java.lang.Object

java.rmi.server.RemoteObject

java.rmi.server.RemoteServer

java.rmi.server.UnicastRemoteObject

weka.experiment.RemoteEngine

All Implemented Interfaces:

Serializable, Remote, RevisionHandler, Compute

public class RemoteEngine
extends UnicastRemoteObject
implements Compute, RevisionHandler

A general purpose server for executing Task objects sent via RMI.

Version:

$Revision: 11247 $

Author:

Mark Hall (mhall@cs.waikato.ac.nz)

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
RemoteEngine(String hostName)	Constructor

Method Summary

Modifier and Type	Method	Description
Object	checkStatus(Object taskId)	Returns status information on a particular task
Object	executeTask(Task t)	Takes a task object and queues it for execution
String	getRevision()	Returns the revision string.
static void	main(String[] args)	Main method.

Methods inherited from class java.rmi.server.UnicastRemoteObject

clone, exportObject, exportObject, exportObject, exportObject, exportObject, unexportObject

Methods inherited from class java.rmi.server.RemoteServer

getClientHost, getLog, setLog

Methods inherited from class java.rmi.server.RemoteObject

equals, getRef, hashCode, toString, toStub

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

RemoteEngine

public RemoteEngine(String hostName)
             throws RemoteException

Constructor

Parameters:

hostName - name of the host

Throws:

RemoteException - if something goes wrong

Method Details

executeTask

public Object executeTask(Task t)
                   throws RemoteException

Takes a task object and queues it for execution

Specified by:

executeTask in interface Compute

Parameters:

t - the Task object to execute

Returns:

an identifier for the Task that can be used when querying Task status

Throws:

RemoteException - if something goes wrong.

checkStatus

public Object checkStatus(Object taskId)
                   throws Exception

Returns status information on a particular task

Specified by:

checkStatus in interface Compute

Parameters:

taskId - the ID of the task to check

Returns:

a TaskStatusInfo encapsulating task status info

Throws:

Exception - if an error occurs

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision

main

public static void main(String[] args)

Main method. Gets address of the local host, creates a remote engine object and binds it in the RMI registry. If there is no RMI registry, then it tries to create one with default port 1099.

Parameters:

args -