/*
* @(#)file SnmpProxyMBean.java
* @(#)author Sun Microsystems, Inc.
* @(#)version X.XX
* @(#)date XX/XX/XX
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*/
package com.sun.jmx.snmp.agent;
// java imports
//
import java.io.Serializable;
import java.util.Enumeration;
// jmx imports
//
import com.sun.jmx.snmp.SnmpStatusException;
import com.sun.jmx.snmp.SnmpDefinitions;
import javax.management.ObjectName;
import javax.management.MBeanServer;
import com.sun.jmx.snmp.SnmpVarBind;
// SNMP Runtime imports
//
import com.sun.jmx.trace.Trace;
/**
* A simple MIB agent that implements SNMP calls (get, set, getnext and getbulk) in a way that only errors or exceptions are returned. Every call done on this agent fails. Error handling is done according to the manager's SNMP protocol version.
* <P>It is used by <CODE>SnmpAdaptorServer</CODE> for its default agent behavior. When a received Oid doesn't match, this agent is called to fill the result list with errors.</P>
* <p><b>This API is a Sun Microsystems internal API and is subject
* to change without notice.</b></p>
* @since 1.5
*
*/
public class SnmpErrorHandlerAgent extends SnmpMibAgent
implements Serializable {
public SnmpErrorHandlerAgent() {}
/**
* Initializes the MIB (with no registration of the MBeans into the
* MBean server). Does nothing.
*
* @exception IllegalAccessException The MIB cannot be initialized.
*/
public void init() throws IllegalAccessException {
}
/**
* Initializes the MIB but each single MBean representing the MIB
* is inserted into the MBean server.
*
* @param server The MBean server to register the service with.
* @param name The object name.
*
* @return The passed name paramter.
*
* @exception java.lang.Exception
*/
public ObjectName preRegister(MBeanServer server, ObjectName name)
throws Exception {
return name;
}
/**
* Gets the root object identifier of the MIB.
* <P>The root object identifier is the object identifier uniquely
* identifying the MIB.
*
* @return The returned oid is null.
*/
public long[] getRootOid() {
return null;
}
/**
* Processes a <CODE>get</CODE> operation. It will throw an exception for V1 requests or it will set exceptions within the list for V2 requests.
*
* @param inRequest The SnmpMibRequest object holding the list of variable to be retrieved.
*
* @exception SnmpStatusException An error occured during the operation.
*/
public void get(SnmpMibRequest inRequest) throws SnmpStatusException {
if(isDebugOn()) trace("get","Get in Exception");
if(inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
throw new SnmpStatusException(SnmpStatusException.noSuchName);
Enumeration l = inRequest.getElements();
while(l.hasMoreElements()) {
SnmpVarBind varbind = (SnmpVarBind) l.nextElement();
varbind.setNoSuchObject();
}
}
/**
* Checks if a <CODE>set</CODE> operation can be performed.
* If the operation can not be performed, the method should emit a
* <CODE>SnmpStatusException</CODE>.
*
* @param inRequest The SnmpMibRequest object holding the list of variables to
* be set. This list is composed of
* <CODE>SnmpVarBind</CODE> objects.
*
* @exception SnmpStatusException The <CODE>set</CODE> operation
* cannot be performed.
*/
public void check(SnmpMibRequest inRequest) throws SnmpStatusException {
if(isDebugOn()) trace("check","Check in Exception");
throw new SnmpStatusException(SnmpDefinitions.snmpRspNotWritable);
}
/**
* Processes a <CODE>set</CODE> operation. Should never be called (check previously called having failed).
*
* @param inRequest The SnmpMibRequest object holding the list of variable to be set.
*
* @exception SnmpStatusException An error occured during the operation.
*/
public void set(SnmpMibRequest inRequest) throws SnmpStatusException {
if(isDebugOn()) trace("set","Set in Exception, CAN't be called");
throw new SnmpStatusException(SnmpDefinitions.snmpRspNotWritable);
}
/**
* Processes a <CODE>getNext</CODE> operation. It will throw an exception for V1 requests or it will set exceptions within the list for V2 requests..
*
* @param inRequest The SnmpMibRequest object holding the list of variables to be retrieved.
*
* @exception SnmpStatusException An error occured during the operation.
*/
public void getNext(SnmpMibRequest inRequest) throws SnmpStatusException {
if(isDebugOn()) trace("getNext","GetNext in Exception");
if(inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
throw new SnmpStatusException(SnmpStatusException.noSuchName);
Enumeration l = inRequest.getElements();
while(l.hasMoreElements()) {
SnmpVarBind varbind = (SnmpVarBind) l.nextElement();
varbind.setEndOfMibView();
}
}
/**
* Processes a <CODE>getBulk</CODE> operation. It will throw an exception if the request is a V1 one or it will set exceptions within the list for V2 ones.
*
* @param inRequest The SnmpMibRequest object holding the list of variable to be retrieved.
*
* @exception SnmpStatusException An error occured during the operation.
*/
public void getBulk(SnmpMibRequest inRequest, int nonRepeat, int maxRepeat)
throws SnmpStatusException {
if(isDebugOn()) trace("getBulk","GetBulk in Exception");
if(inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
throw new SnmpStatusException(SnmpDefinitions.snmpRspGenErr, 0);
Enumeration l = inRequest.getElements();
while(l.hasMoreElements()) {
SnmpVarBind varbind = (SnmpVarBind) l.nextElement();
varbind.setEndOfMibView();
}
}
private boolean isDebugOn() {
return Trace.isSelected(Trace.LEVEL_DEBUG, Trace.INFO_ADAPTOR_SNMP);
}
private void debug(String clz, String func, String info) {
Trace.send(Trace.LEVEL_TRACE, Trace.INFO_ADAPTOR_SNMP, clz, func, info);
}
private void trace(String func, String info) {
debug(dbgTag, func, info);
}
private String dbgTag = "SnmpErrorHandlerAgent";
}
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