Module org.snmp4j.agent

Package org.snmp4j.agent.mo.util

Class MOTableSizeLimit<R extends MOTableRow>

java.lang.Object

org.snmp4j.agent.mo.util.MOTableSizeLimit<R>

All Implemented Interfaces:

EventListener, MOTableRowListener<R>

Direct Known Subclasses:

LogMOTableSizeLimit

public class MOTableSizeLimit<R extends MOTableRow>
extends Object
implements MOTableRowListener<R>

This class implements a size limit on the number of rows in a table. If the limit is reached or exceeded, no more additional rows can be added by SNMP means.

Use the DefaultMOServer.registerTableRowListener(org.snmp4j.agent.MOServer, org.snmp4j.agent.mo.MOTableRowListener<R>) method to register this table row listener for all tables in your agent, in order to be able to control the table sizes of all the tables in a server.

Since:

1.1.5

Version:

1.4

Author:

Frank Fock

Field Summary

Fields

Modifier and Type	Field	Description
static String	PROPERTY_PREFIX	The property prefix each size limit definition has to start with.

Constructor Summary

Constructors

Constructor	Description
MOTableSizeLimit(int maxNumRows)
MOTableSizeLimit(Properties limits)

Method Summary

Modifier and Type	Method	Description
SortedMap<org.snmp4j.smi.OID,Integer>	getLimits()
int	getMaxNumRows()
protected boolean	removeEldest(MOTableRowEvent<R> triggeringEvent, int numRows)	Remove try to remove a given number of eldest rows of the table referred to in the triggering event object.
void	rowChanged(MOTableRowEvent<R> event)	A column or a complete row is changed/has been changed.
void	setLimits(Properties limits)
void	setMaxNumRows(int maxNumRows)

Methods inherited from class java.lang.Object

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

Field Detail

PROPERTY_PREFIX

public static final String PROPERTY_PREFIX

The property prefix each size limit definition has to start with. The OID subtree for which the definition is effective is then appended as follows: snmp4j.MOTableSizeLimit.<OID>=<limit> where limit is a positive number or zero.

See Also:

Constant Field Values

Constructor Detail

MOTableSizeLimit

public MOTableSizeLimit(int maxNumRows)

MOTableSizeLimit

public MOTableSizeLimit(Properties limits)

Method Detail

rowChanged

public void rowChanged(MOTableRowEvent<R> event)

A column or a complete row is changed/has been changed.

Specified by:

rowChanged in interface MOTableRowListener<R extends MOTableRow>

Parameters:

event - a MOTableRowEvent describing the event. To veto the event the MOTableRowEvent.setVetoStatus(int) and optionally also the MOTableRowEvent.setVetoColumn(int) can be called.

removeEldest

protected boolean removeEldest(MOTableRowEvent<R> triggeringEvent,
                               int numRows)

Remove try to remove a given number of eldest rows of the table referred to in the triggering event object.

Parameters:

triggeringEvent - the MOTableRowEvent object that describes the table with exceeding row limit.

numRows - the number of rows to remove (if possible).

Returns:

true if one or more rows could be removed and false if the causing event should be denied/rejected. The default implementation returns false always.

setMaxNumRows

public void setMaxNumRows(int maxNumRows)

getMaxNumRows

public int getMaxNumRows()

getLimits

public SortedMap<org.snmp4j.smi.OID,Integer> getLimits()

setLimits

public void setLimits(Properties limits)