org.snmp4j.agent.UpdatableManagedObject Maven / Gradle / Ivy
/*_############################################################################
_##
_## SNMP4J-Agent - UpdatableManagedObject.java
_##
_## Copyright (C) 2005-2009 Frank Fock (SNMP4J.org)
_##
_## Licensed under the Apache License, Version 2.0 (the "License");
_## you may not use this file except in compliance with the License.
_## You may obtain a copy of the License at
_##
_## http://www.apache.org/licenses/LICENSE-2.0
_##
_## Unless required by applicable law or agreed to in writing, software
_## distributed under the License is distributed on an "AS IS" BASIS,
_## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
_## See the License for the specific language governing permissions and
_## limitations under the License.
_##
_##########################################################################*/
package org.snmp4j.agent;
import java.util.Date;
/**
* The UpdatableManagedObject interface defines the basic
* operations for all SNMP(4J) manageable objects that need to be updated
* to reflect the up-to-date state of the managed object.
*
* @author Frank Fock
* @since 1.2
* @version 1.2
*/
public interface UpdatableManagedObject extends ManagedObject {
/**
* Gets the date and time of the last update. If that time cannot be
* determined null is returned.
*
* @return
* the Date when the last {@link #update(MOQuery updateScope)} has
* been called.
*/
Date getLastUpdate();
/**
* Gets the object that triggered the last update of this managed object.
* The returned object reference may be used to check if an update has
* already been performed for the specified source, which is typically a
* SNMP request.
*
* @return
* an object or null if the source of the last update is
* unknown/undefined.
*/
Object getLastUpdateSource();
/**
* Update the content of the managed object that is covered by the supplied
* scope.
*
* @param updateScope
* the query that triggered the update and thus defining the update scope.
* If null the whole managed object has to be updated.
*/
void update(MOQuery updateScope);
}