org.apache.oodt.cas.resource.monitor

Class AssignmentMonitor

java.lang.Object

org.apache.oodt.cas.resource.monitor.AssignmentMonitor

All Implemented Interfaces:

Monitor

public class AssignmentMonitor
extends Object
implements Monitor

Version:

$Revision$

An implementation of the Monitor interface that loads its information about the underlying nodes from an XML file called nodes.xml. This implementation additionally uses an in-memory hash map to monitor the load on a given set of ResourceNodes.

Author:

woollard, bfoster, mattmann

Constructor Summary

Constructors

Constructor and Description
AssignmentMonitor(List<ResourceNode> nodes)

Method Summary

Modifier and Type	Method and Description
void	addNode(ResourceNode node) Adds a new ResourceNode for this Monitor to manage (if node already exist, then should perform update)
boolean	assignLoad(ResourceNode node, int loadValue)
int	getLoad(ResourceNode node) Gets the load on a resource node available to the resource manager.
ResourceNode	getNodeById(String nodeId) Gets the ResourceNode with the given nodeId.
ResourceNode	getNodeByURL(URL ipAddr) Returns the ResourceNode with the given ipAddr.
List<ResourceNode>	getNodes()
boolean	reduceLoad(ResourceNode node, int loadValue) Reduces the load on a particular ResourceNode by the given loadValue.
void	removeNodeById(String nodeId) Remove ResourceNode from this Monitor

Methods inherited from class java.lang.Object

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

Constructor Detail

AssignmentMonitor

public AssignmentMonitor(List<ResourceNode> nodes)

Method Detail

assignLoad

public boolean assignLoad(ResourceNode node,
                          int loadValue)
                   throws MonitorException

Specified by:

assignLoad in interface Monitor

Parameters:

node - The ResourceNode to assign load to.

loadValue - The integer load to assign to the given ResourceNode.

Returns:

True if the Monitor was able to assign the load, false otherwise.

Throws:

MonitorException - If any error occurs assigning the load.

reduceLoad

public boolean reduceLoad(ResourceNode node,
                          int loadValue)
                   throws MonitorException

Description copied from interface: Monitor

Reduces the load on a particular ResourceNode by the given loadValue.

Specified by:

reduceLoad in interface Monitor

Parameters:

node - The ResourceNode to reduce the load on.

loadValue - The amount of reduction.

Returns:

True if successfully reduced, false otherwise.

Throws:

MonitorException - If any error occurs.

getLoad

public int getLoad(ResourceNode node)
            throws MonitorException

Description copied from interface: Monitor

Gets the load on a resource node available to the resource manager.

Specified by:

getLoad in interface Monitor

Parameters:

node - The ResourceNode to obtain the load for.

Returns:

An integer respresentation of the load on a ResourceNode.

Throws:

MonitorException - If there is any error obtaining the load.

getNodes

public List<ResourceNode> getNodes()
                            throws MonitorException

Specified by:

getNodes in interface Monitor

Returns:

A List of the ResourceNodes known to the resource manager.

Throws:

MonitorException - If any error occurs getting the List of ResourceNodes.

getNodeById

public ResourceNode getNodeById(String nodeId)
                         throws MonitorException

Description copied from interface: Monitor

Gets the ResourceNode with the given nodeId.

Specified by:

getNodeById in interface Monitor

Returns:

The ResourceNode for the corresponding nodeId.

Throws:

MonitorException - If any error occurs.

getNodeByURL

public ResourceNode getNodeByURL(URL ipAddr)
                          throws MonitorException

Description copied from interface: Monitor

Returns the ResourceNode with the given ipAddr.

Specified by:

getNodeByURL in interface Monitor

Parameters:

ipAddr - The URL of the ResourceNode to return.

Returns:

The ResourceNode with the given ipAddr.

Throws:

MonitorException - If any error occurs.

addNode

public void addNode(ResourceNode node)
             throws MonitorException

Description copied from interface: Monitor

Adds a new ResourceNode for this Monitor to manage (if node already exist, then should perform update)

Specified by:

addNode in interface Monitor

Parameters:

node - The new ResourceNode to manage

Throws:

MonitorException

removeNodeById

public void removeNodeById(String nodeId)
                    throws MonitorException

Description copied from interface: Monitor

Remove ResourceNode from this Monitor

Specified by:

removeNodeById in interface Monitor

Parameters:

nodeId - The id of the ResourceNode to remove

Throws:

MonitorException