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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package com.sun.jmx.snmp.agent;
import java.io.Serializable;
import java.util.Enumeration;
import java.util.logging.Level;
import javax.management.ObjectName;
import javax.management.MBeanServer;
import static com.sun.jmx.defaults.JmxProperties.SNMP_ADAPTOR_LOGGER;
import com.sun.jmx.snmp.SnmpStatusException;
import com.sun.jmx.snmp.SnmpDefinitions;
import com.sun.jmx.snmp.SnmpVarBind;
/**
* 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 {
private static final long serialVersionUID = 7751082923508885650L;
public SnmpErrorHandlerAgent() {}
/**
* Initializes the MIB (with no registration of the MBeans into the
* MBean server). Does nothing.
*
* @exception IllegalAccessException The MIB cannot be initialized.
*/
@Override
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 parameter.
*
* @exception java.lang.Exception
*/
@Override
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.
*/
@Override
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 occurred during the operation.
*/
@Override
public void get(SnmpMibRequest inRequest) throws SnmpStatusException {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST,
SnmpErrorHandlerAgent.class.getName(),
"get", "Get in Exception");
if(inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
throw new SnmpStatusException(SnmpStatusException.noSuchName);
Enumeration<SnmpVarBind> l = inRequest.getElements();
while(l.hasMoreElements()) {
SnmpVarBind varbind = 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.
*/
@Override
public void check(SnmpMibRequest inRequest) throws SnmpStatusException {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST,
SnmpErrorHandlerAgent.class.getName(),
"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 occurred during the operation.
*/
@Override
public void set(SnmpMibRequest inRequest) throws SnmpStatusException {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST,
SnmpErrorHandlerAgent.class.getName(),
"set", "Set in Exception, CANNOT 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 occurred during the operation.
*/
@Override
public void getNext(SnmpMibRequest inRequest) throws SnmpStatusException {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST,
SnmpErrorHandlerAgent.class.getName(),
"getNext", "GetNext in Exception");
if(inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
throw new SnmpStatusException(SnmpStatusException.noSuchName);
Enumeration<SnmpVarBind> l = inRequest.getElements();
while(l.hasMoreElements()) {
SnmpVarBind varbind = 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 occurred during the operation.
*/
@Override
public void getBulk(SnmpMibRequest inRequest, int nonRepeat, int maxRepeat)
throws SnmpStatusException {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST,
SnmpErrorHandlerAgent.class.getName(),
"getBulk", "GetBulk in Exception");
if(inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
throw new SnmpStatusException(SnmpDefinitions.snmpRspGenErr, 0);
Enumeration<SnmpVarBind> l = inRequest.getElements();
while(l.hasMoreElements()) {
SnmpVarBind varbind = l.nextElement();
varbind.setEndOfMibView();
}
}
}