org.snmp4j.agent.mo.ext.SimMOFactory Maven / Gradle / Ivy
/*_############################################################################
_##
_## SNMP4J-Agent 3 - SimMOFactory.java
_##
_## Copyright (C) 2005-2018 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.mo.ext;
import org.snmp4j.agent.mo.*;
import org.snmp4j.agent.MOAccess;
import java.util.Map;
import java.util.HashMap;
/**
* A SimMOFactory object can be used to create non-default MOAccess
* instances which support an agent simulation mode which allows the
* modification of MIB objects at runtime via SNMP that are not writable in
* normal operation but writable in a special config mode (see
* AGENTPP-SIMULATION-MIB).
*
* By creating the ManagedObject instances for a MIB module based on this
* factory the injected special MOAccess instances support changing the
* operation mode for these instances from normal operation to simulation
* mode. In simulation mode, an agent can be filled with data via SNMP
* regardless whether the objects are defined as writable or not. Such a
* simulation agent can be used for testing/developing management applications
* when real agents are not (physically) available.
*
* @author Frank Fock
* @version 1.0
*/
public class SimMOFactory extends DefaultMOFactory {
private Map accessModes = new HashMap();
private static boolean simulationModeEnabled;
private static SimMOFactory instance;
protected SimMOFactory() {
}
public synchronized static MOFactory getInstance() {
if (instance == null) {
instance = new SimMOFactory();
}
return instance;
}
public static void setSimulationModeEnabled(boolean simulationMode) {
simulationModeEnabled = simulationMode;
}
public static boolean isSimulationModeEnabled() {
return simulationModeEnabled;
}
public synchronized MOAccess createAccess(int moAccess) {
MOAccess accessObj = accessModes.get(moAccess);
if (accessObj == null) {
accessObj = new SimMOAccess(moAccess);
accessModes.put(moAccess, accessObj);
}
return accessObj;
}
public class SimMOAccess extends MOAccessImpl {
public SimMOAccess(int moAccess) {
super(moAccess);
}
public boolean isAccessibleForCreate() {
if (isSimulationModeEnabled()) {
return true;
}
return super.isAccessibleForCreate();
}
public boolean isAccessibleForWrite() {
if (isSimulationModeEnabled()) {
return true;
}
return super.isAccessibleForWrite();
}
}
}