org.gridbus.broker.persistence
Class State

java.lang.Object
  |
  +--org.gridbus.broker.farming.common.FarmingEngine
        |
        +--org.gridbus.broker.farming.common.GridbusFarmingEngine
              |
              +--org.gridbus.broker.persistence.State

public class State

extends GridbusFarmingEngine

The State class represents the current state of the broker. It extends the farming engine and is primarily used with the persistence functions. The State object is passed as a parameter to the "store" method of the farming engine. The store method itself could be called by any function that wants to store the state of the broker at any particular time. Some of the situations when the farming engine could be "stored" are when certain "interesting" events occur. Some such events would be: - broker initialisation complete (after setting up jobs and servers) - broker starting scheduling (beginning to start scheduling) - job status change (ready,executing,done,failed etc) - server status change (dead, alive, busy etc) - scheduler completing the current poll - all jobs executed (hence broker application is completed).

Author:

krishna

Field Summary

static int	COMPLETED
static int	STARTED
static int	UNKNOWN

Constructor Summary

State(GridbusFarmingEngine fe)
Represents a State object (which is a snapshot of the entire farming engine at some instance of time.

State(java.lang.String brokerID)
Create a new farmingEngine using this constructor.

Method Summary

java.util.Date	getLastUpdateStamp()
int	getStatus()
java.lang.String	getStatusString()
void	setStatus(int status)
void	setStatusString(java.lang.String status)

Methods inherited from class org.gridbus.broker.farming.common.GridbusFarmingEngine

getAppDescriptionFile, getBrokerID, getBudget, getCurrentState, getDataFileList, getDataHostTable, getDeadline, getJobCount, getJobs, getLocalDirectory, getNextNJobs, getNextNJobs, getResourceDescriptionFile, getScheduler, getStartDateStamp, getStats, getTempDirectory, getTotalJobCount, getUsername, init, initJobs, initResources, isFeasible, isInputDataFilePresent, isSchedulingComplete, isSchedulingFailed, isSchedulingFinished, schedule, setAppDescriptionFile, setBudget, setDataFileList, setDataHostTable, setDeadline, setFeasible, setLocalDirectory, setResourceDescriptionFile, setScheduler, setStartDateStamp, setTempDirectory, setUsername, store, storeJobs, storeServers, terminate, terminateJob

Methods inherited from class org.gridbus.broker.farming.common.FarmingEngine

addJob, addServer, getJobs, getServers, setJobs, setServers

Methods inherited from class java.lang.Object

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

Field Detail

UNKNOWN

public static final int UNKNOWN

See Also:

Constant Field Values

STARTED

public static final int STARTED

See Also:

Constant Field Values

COMPLETED

public static final int COMPLETED

See Also:

Constant Field Values

Constructor Detail

State

public State(java.lang.String brokerID)
      throws GridBrokerException

Create a new farmingEngine using this constructor. This is used during only the "recovery" process. To get the current state, always use the farming engine.getCurrentState()

Parameters:

brokerID -

Throws:

GridBrokerException

State

public State(GridbusFarmingEngine fe)
      throws GridBrokerException

Represents a State object (which is a snapshot of the entire farming engine at some instance of time. This constructor is meant to be used only when the current state of the fe is to be frozen for saving to persistent storage for example.

Parameters:

fe -

Throws:

GridBrokerException

Method Detail

getStatus

public int getStatus()

Returns:

Returns the status.

setStatus

public void setStatus(int status)

Parameters:

status - The status to set.

getStatusString

public java.lang.String getStatusString()

Returns:

setStatusString

public void setStatusString(java.lang.String status)

Parameters:

status -

getLastUpdateStamp

public java.util.Date getLastUpdateStamp()

Returns:

Returns the lastUpdateStamp.