org.friendlysnmp

Class FValueNode

java.lang.Object

org.friendlysnmp.FNode

org.friendlysnmp.FValueNode

Direct Known Subclasses:

FScalar, FTable

public abstract class FValueNode
extends FNode

Abstract base class which represents MIB node with a value (scalar, table).

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	persistLoaded Flag with indication that scalar was loaded from persistent storage.

Fields inherited from class org.friendlysnmp.FNode

agent

Constructor Summary

Constructors

Constructor and Description
FValueNode(java.lang.String name, org.snmp4j.smi.OID oid)

Method Summary

Modifier and Type	Method and Description
void	addRestoreDefaultListener(FRestoreDefaultListener l) Registers the given observer to begin receiving "restore default" events when changes are made to the managed object.
void	fireRestoreDefaultEvent() Fires RESTORE DEFAULT event.
boolean	isPersistLoaded() Returns flag that this node was loaded from persistent storage.
abstract boolean	isVolatile() Returns volatile flag.
protected abstract void	loadPersistValue() Loads persistent value into the scalar/table.
void	removeRestoreDefaultListener(FRestoreDefaultListener l) Unregisters the given observer to stop receiving "restore default" events when changes are made to the managed object.
void	setVolatile(boolean volatileNode) Sets the volatile flag for this node.
protected abstract void	setVolatilePrivate(boolean isVolatile)

Methods inherited from class org.friendlysnmp.FNode

getFID, getFIDtoString, getName, getOID, getOIDSize, getPersistStorage, makeFException, makeFException, setAgent

Methods inherited from class java.lang.Object

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

Field Detail

persistLoaded

protected boolean persistLoaded

Flag with indication that scalar was loaded from persistent storage.

Constructor Detail

FValueNode

public FValueNode(java.lang.String name,
                  org.snmp4j.smi.OID oid)

Method Detail

addRestoreDefaultListener

public void addRestoreDefaultListener(FRestoreDefaultListener l)

Registers the given observer to begin receiving "restore default" events when changes are made to the managed object.

Parameters:

l - the observer to register

removeRestoreDefaultListener

public void removeRestoreDefaultListener(FRestoreDefaultListener l)

Unregisters the given observer to stop receiving "restore default" events when changes are made to the managed object.

Parameters:

l - the observer to unregister

isPersistLoaded

public boolean isPersistLoaded()

Returns flag that this node was loaded from persistent storage.

Returns:

flag that scalar was loaded from persistent storage.

loadPersistValue

protected abstract void loadPersistValue()

Loads persistent value into the scalar/table. If for any reason the load fails the persistent entry is removed for clean start in the next application run.

setVolatile

public void setVolatile(boolean volatileNode)

Sets the volatile flag for this node. This method must be called explicitly with parameter false to load persistent value for scalars and tables.

Parameters:

volatileNode - set to true to prevent saving the state of this object in persistency storage by agent when the value is modified from the MIB browser.

setVolatilePrivate

protected abstract void setVolatilePrivate(boolean isVolatile)

fireRestoreDefaultEvent

public void fireRestoreDefaultEvent()
                             throws FException

Fires RESTORE DEFAULT event.

Throws:

FException - failure to restore default event.

isVolatile

public abstract boolean isVolatile()

Returns volatile flag. Volatile objects are not stored in persistency storage after their modification via management protocol.

Returns:

volatile flag