Java > Open Source Codes > com > sun > jmx > snmp > agent > SnmpMibAgent


1 /*
2  * @(#)file SnmpMibAgent.java
3  * @(#)author Sun Microsystems, Inc.
4  * @(#)version 4.40
5  * @(#)date 08/02/09
6  *
7  * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
8  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
9  *
10  */
11
12
13 package com.sun.jmx.snmp.agent;
14
15
16
17 // java imports
18 //
19 import java.io.Serializable ;
20 import java.util.Vector ;
21 import java.util.Enumeration ;
22 import java.util.Set ;
23
24 // jmx imports
25 //
26 import javax.management.MBeanServer ;
27 import javax.management.MBeanRegistration ;
28 import javax.management.ObjectName ;
29 import javax.management.MalformedObjectNameException ;
30 import javax.management.InstanceNotFoundException ;
31 import javax.management.ServiceNotFoundException ;
32 import javax.management.ReflectionException ;
33 import javax.management.MBeanException ;
34 import com.sun.jmx.snmp.SnmpVarBind;
35 import com.sun.jmx.snmp.SnmpDefinitions;
36 import com.sun.jmx.snmp.SnmpStatusException;
37 import com.sun.jmx.snmp.SnmpPdu;
38 import com.sun.jmx.snmp.SnmpOid;
39 import com.sun.jmx.snmp.SnmpEngine;
40
41 /**
42  * Abstract class for representing an SNMP agent.
43  *
44  * The class is used by the SNMP protocol adaptor as the entry point in
45  * the SNMP agent to query.
46  *
47  * <p><b>This API is a Sun Microsystems internal API and is subject
48  * to change without notice.</b></p>
49  * @version 4.40 12/19/03
50  * @author Sun Microsystems, Inc
51  */
52
53 public abstract class SnmpMibAgent
54     implements SnmpMibAgentMBean, MBeanRegistration , Serializable {
55   
56     /**
57      * Default constructor.
58      */
59     public SnmpMibAgent() {
60     }
61     
62     // ---------------------------------------------------------------------
63 // PUBLIC METHODS
64 //----------------------------------------------------------------------
65
66     /**
67      * Initializes the MIB (with no registration of the MBeans into the
68      * MBean server).
69      *
70      * @exception IllegalAccessException The MIB can not be initialized.
71      */
72     public abstract void init() throws IllegalAccessException ;
73   
74     /**
75      * Initializes the MIB but each single MBean representing the MIB
76      * is inserted into the MBean server.
77      *
78      * @param server The MBean server to register the service with.
79      * @param name The object name.
80      *
81      * @return The name of the SNMP MIB registered.
82      *
83      * @exception java.lang.Exception
84      */
85     public abstract ObjectName preRegister(MBeanServer server,
86                        ObjectName name)
87     throws java.lang.Exception ;
88             
89     /**
90      * Not used in this context.
91      */
92     public void postRegister (Boolean registrationDone) {
93     }
94
95     /**
96      * Not used in this context.
97      */
98     public void preDeregister() throws java.lang.Exception {
99     }
100
101     /**
102      * Not used in this context.
103      */
104     public void postDeregister() {
105     }
106         
107     /**
108      * Processes a <CODE>get</CODE> operation.
109      * This method must update the SnmpVarBinds contained in the
110      * <var>{@link SnmpMibRequest} req</var> parameter.
111      *
112      * @param req The SnmpMibRequest object holding the list of variable to
113      * be retrieved. This list is composed of
114      * <CODE>SnmpVarBind</CODE> objects.
115      *
116      * @exception SnmpStatusException An error occured during the operation.
117      */
118     public abstract void get(SnmpMibRequest req)
119     throws SnmpStatusException;
120   
121     /**
122      * Processes a <CODE>getNext</CODE> operation.
123      * This method must update the SnmpVarBinds contained in the
124      * <var>{@link SnmpMibRequest} req</var> parameter.
125      *
126      * @param req The SnmpMibRequest object holding the list of
127      * OIDs from which the next variables should be retrieved.
128      * This list is composed of <CODE>SnmpVarBind</CODE> objects.
129      *
130      * @exception SnmpStatusException An error occured during the operation.
131      */
132     public abstract void getNext(SnmpMibRequest req)
133     throws SnmpStatusException;
134     
135     /**
136      * Processes a <CODE>getBulk</CODE> operation.
137      * This method must update the SnmpVarBinds contained in the
138      * <var>{@link SnmpMibRequest} req</var> parameter.
139      *
140      * @param req The SnmpMibRequest object holding the list of variable to
141      * be retrieved. This list is composed of
142      * <CODE>SnmpVarBind</CODE> objects.
143      *
144      * @param nonRepeat The number of variables, starting with the first
145      * variable in the variable-bindings, for which a single
146      * lexicographic successor is requested.
147      *
148      * @param maxRepeat The number of lexicographic successors requested
149      * for each of the last R variables. R is the number of variables
150      * following the first <CODE>nonRepeat</CODE> variables for which
151      * multiple lexicographic successors are requested.
152      *
153      * @exception SnmpStatusException An error occured during the operation.
154      */
155     public abstract void getBulk(SnmpMibRequest req, int nonRepeat,
156                  int maxRepeat)
157     throws SnmpStatusException;
158   
159     /**
160      * Processes a <CODE>set</CODE> operation.
161      * This method must update the SnmpVarBinds contained in the
162      * <var>{@link SnmpMibRequest} req</var> parameter.
163      * This method is called during the second phase of the SET two-phase
164      * commit.
165      *
166      * @param req The SnmpMibRequest object holding the list of variable to
167      * be set. This list is composed of
168      * <CODE>SnmpVarBind</CODE> objects.
169      *
170      * @exception SnmpStatusException An error occured during the operation.
171      * Throwing an exception in this method will break the
172      * atomicity of the SET operation. Care must be taken so that
173      * the exception is thrown in the {@link #check(SnmpMibRequest)}
174      * method instead.
175      */
176     public abstract void set(SnmpMibRequest req)
177     throws SnmpStatusException;
178       
179
180     /**
181      * Checks if a <CODE>set</CODE> operation can be performed.
182      * If the operation can not be performed, the method should throw an
183      * <CODE>SnmpStatusException</CODE>.
184      * This method is called during the first phase of the SET two-phase
185      * commit.
186      *
187      * @param req The SnmpMibRequest object holding the list of variable to
188      * be set. This list is composed of
189      * <CODE>SnmpVarBind</CODE> objects.
190      *
191      * @exception SnmpStatusException The <CODE>set</CODE> operation
192      * cannot be performed.
193      */
194     public abstract void check(SnmpMibRequest req)
195     throws SnmpStatusException;
196   
197     /**
198      * Gets the root object identifier of the MIB.
199      * <P>The root object identifier is the object identifier uniquely
200      * identifying the MIB.
201      *
202      * @return The root object identifier.
203      */
204     public abstract long[] getRootOid();
205     
206     // ---------------------------------------------------------------------
207 // GETTERS AND SETTERS
208 // ---------------------------------------------------------------------
209
210     /**
211      * Gets the reference to the MBean server in which the SNMP MIB is
212      * registered.
213      *
214      * @return The MBean server or null if the MIB is not registered in any
215      * MBean server.
216      */
217     public MBeanServer getMBeanServer() {
218         return server;
219     }
220       
221     /**
222      * Gets the reference to the SNMP protocol adaptor to which the MIB is
223      * bound.
224      *
225      * @return The SNMP MIB handler.
226      */
227     public SnmpMibHandler getSnmpAdaptor() {
228         return adaptor;
229     }
230     
231     /**
232      * Sets the reference to the SNMP protocol adaptor through which the MIB
233      * will be SNMP accessible and add this new MIB in the SNMP MIB handler.
234      *
235      * @param stack The SNMP MIB handler.
236      */
237     public void setSnmpAdaptor(SnmpMibHandler stack) {
238         if (adaptor != null) {
239             adaptor.removeMib(this);
240         }
241         adaptor = stack;
242         if (adaptor != null) {
243             adaptor.addMib(this);
244         }
245     }
246     
247      /**
248      * Sets the reference to the SNMP protocol adaptor through which the MIB
249      * will be SNMP accessible and add this new MIB in the SNMP MIB handler.
250      * This method is to be called to set a specific agent to a specific OID. This can be useful when dealing with MIB overlapping.
251      * Some OID can be implemented in more than one MIB. In this case, the OID nearest the agent will be used on SNMP operations.
252      * @param stack The SNMP MIB handler.
253      * @param oids The set of OIDs this agent implements.
254      *
255      * @since 1.5
256      */
257     public void setSnmpAdaptor(SnmpMibHandler stack, SnmpOid[] oids) {
258         if (adaptor != null) {
259             adaptor.removeMib(this);
260         }
261         adaptor = stack;
262         if (adaptor != null) {
263             adaptor.addMib(this, oids);
264         }
265     }
266
267     /**
268      * Sets the reference to the SNMP protocol adaptor through which the MIB
269      * will be SNMP accessible and adds this new MIB in the SNMP MIB handler.
270      * Adds a new contextualized MIB in the SNMP MIB handler.
271      *
272      * @param stack The SNMP MIB handler.
273      * @param contextName The MIB context name. If null is passed, will be registered in the default context.
274      *
275      * @exception IllegalArgumentException If the parameter is null.
276      *
277      * @since 1.5
278      */
279     public void setSnmpAdaptor(SnmpMibHandler stack, String contextName) {
280         if (adaptor != null) {
281             adaptor.removeMib(this, contextName);
282         }
283         adaptor = stack;
284         if (adaptor != null) {
285             adaptor.addMib(this, contextName);
286         }
287     }
288     /**
289      * Sets the reference to the SNMP protocol adaptor through which the MIB
290      * will be SNMP accessible and adds this new MIB in the SNMP MIB handler.
291      * Adds a new contextualized MIB in the SNMP MIB handler.
292      *
293      * @param stack The SNMP MIB handler.
294      * @param contextName The MIB context name. If null is passed, will be registered in the default context.
295      * @param oids The set of OIDs this agent implements.
296      * @exception IllegalArgumentException If the parameter is null.
297      *
298      * @since 1.5
299      */
300     public void setSnmpAdaptor(SnmpMibHandler stack,
301                    String contextName,
302                    SnmpOid[] oids) {
303         if (adaptor != null) {
304             adaptor.removeMib(this, contextName);
305         }
306         adaptor = stack;
307         if (adaptor != null) {
308             adaptor.addMib(this, contextName, oids);
309         }
310     }
311
312     /**
313      * Gets the object name of the SNMP protocol adaptor to which the MIB
314      * is bound.
315      *
316      * @return The name of the SNMP protocol adaptor.
317      */
318     public ObjectName getSnmpAdaptorName() {
319         return adaptorName;
320     }
321     
322     /**
323      * Sets the reference to the SNMP protocol adaptor through which the MIB
324      * will be SNMP accessible and add this new MIB in the SNMP MIB handler
325      * associated to the specified <CODE>name</CODE>.
326      *
327      * @param name The name of the SNMP protocol adaptor.
328      *
329      * @exception InstanceNotFoundException The SNMP protocol adaptor does
330      * not exist in the MBean server.
331      *
332      * @exception ServiceNotFoundException This SNMP MIB is not registered
333      * in the MBean server or the requested service is not supported.
334      */
335     public void setSnmpAdaptorName(ObjectName name)
336     throws InstanceNotFoundException , ServiceNotFoundException {
337               
338         if (server == null) {
339             throw new ServiceNotFoundException (mibName + " is not registered in the MBean server");
340         }
341         // First remove the reference on the old adaptor server.
342 //
343 if (adaptor != null) {
344             adaptor.removeMib(this);
345         }
346         
347         // Then update the reference to the new adaptor server.
348 //
349 Object [] params = {this};
350         String [] signature = {"com.sun.jmx.snmp.agent.SnmpMibAgent"};
351         try {
352             adaptor = (SnmpMibHandler)(server.invoke(name, "addMib", params,
353                              signature));
354         } catch (InstanceNotFoundException e) {
355             throw new InstanceNotFoundException (name.toString());
356         } catch (ReflectionException e) {
357             throw new ServiceNotFoundException (name.toString());
358         } catch (MBeanException e) {
359             // Should never occur...
360 }
361         
362         adaptorName = name;
363     }
364     /**
365      * Sets the reference to the SNMP protocol adaptor through which the MIB
366      * will be SNMP accessible and add this new MIB in the SNMP MIB handler
367      * associated to the specified <CODE>name</CODE>.
368      * This method is to be called to set a specific agent to a specific OID. This can be useful when dealing with MIB overlapping.
369      * Some OID can be implemented in more than one MIB. In this case, the OID nearer agent will be used on SNMP operations.
370      * @param name The name of the SNMP protocol adaptor.
371      * @param oids The set of OIDs this agent implements.
372      * @exception InstanceNotFoundException The SNMP protocol adaptor does
373      * not exist in the MBean server.
374      *
375      * @exception ServiceNotFoundException This SNMP MIB is not registered
376      * in the MBean server or the requested service is not supported.
377      *
378      * @since 1.5
379      */
380     public void setSnmpAdaptorName(ObjectName name, SnmpOid[] oids)
381     throws InstanceNotFoundException , ServiceNotFoundException {
382               
383         if (server == null) {
384             throw new ServiceNotFoundException (mibName + " is not registered in the MBean server");
385         }
386         // First remove the reference on the old adaptor server.
387 //
388 if (adaptor != null) {
389             adaptor.removeMib(this);
390         }
391         
392         // Then update the reference to the new adaptor server.
393 //
394 Object [] params = {this, oids};
395         String [] signature = {"com.sun.jmx.snmp.agent.SnmpMibAgent",
396     oids.getClass().getName()};
397         try {
398             adaptor = (SnmpMibHandler)(server.invoke(name, "addMib", params,
399                              signature));
400         } catch (InstanceNotFoundException e) {
401             throw new InstanceNotFoundException (name.toString());
402         } catch (ReflectionException e) {
403             throw new ServiceNotFoundException (name.toString());
404         } catch (MBeanException e) {
405             // Should never occur...
406 }
407         
408         adaptorName = name;
409     }
410     /**
411      * Sets the reference to the SNMP protocol adaptor through which the MIB
412      * will be SNMP accessible and add this new MIB in the SNMP MIB handler
413      * associated to the specified <CODE>name</CODE>.
414      *
415      * @param name The name of the SNMP protocol adaptor.
416      * @param contextName The MIB context name. If null is passed, will be registered in the default context.
417      * @exception InstanceNotFoundException The SNMP protocol adaptor does
418      * not exist in the MBean server.
419      *
420      * @exception ServiceNotFoundException This SNMP MIB is not registered
421      * in the MBean server or the requested service is not supported.
422      *
423      * @since 1.5
424      */
425     public void setSnmpAdaptorName(ObjectName name, String contextName)
426     throws InstanceNotFoundException , ServiceNotFoundException {
427               
428         if (server == null) {
429             throw new ServiceNotFoundException (mibName + " is not registered in the MBean server");
430         }
431         
432         // First remove the reference on the old adaptor server.
433 //
434 if (adaptor != null) {
435             adaptor.removeMib(this, contextName);
436         }
437         
438         // Then update the reference to the new adaptor server.
439 //
440 Object [] params = {this, contextName};
441         String [] signature = {"com.sun.jmx.snmp.agent.SnmpMibAgent", "java.lang.String"};
442         try {
443             adaptor = (SnmpMibHandler)(server.invoke(name, "addMib", params,
444                              signature));
445         } catch (InstanceNotFoundException e) {
446             throw new InstanceNotFoundException (name.toString());
447         } catch (ReflectionException e) {
448             throw new ServiceNotFoundException (name.toString());
449         } catch (MBeanException e) {
450             // Should never occur...
451 }
452         
453         adaptorName = name;
454     }
455  
456     /**
457      * Sets the reference to the SNMP protocol adaptor through which the MIB
458      * will be SNMP accessible and add this new MIB in the SNMP MIB handler
459      * associated to the specified <CODE>name</CODE>.
460      *
461      * @param name The name of the SNMP protocol adaptor.
462      * @param contextName The MIB context name. If null is passed, will be registered in the default context.
463      * @param oids The set of OIDs this agent implements.
464      * @exception InstanceNotFoundException The SNMP protocol adaptor does
465      * not exist in the MBean server.
466      *
467      * @exception ServiceNotFoundException This SNMP MIB is not registered
468      * in the MBean server or the requested service is not supported.
469      *
470      * @since 1.5
471      */
472     public void setSnmpAdaptorName(ObjectName name,
473                    String contextName, SnmpOid[] oids)
474     throws InstanceNotFoundException , ServiceNotFoundException {
475     
476         if (server == null) {
477             throw new ServiceNotFoundException (mibName + " is not registered in the MBean server");
478         }
479         
480         // First remove the reference on the old adaptor server.
481 //
482 if (adaptor != null) {
483             adaptor.removeMib(this, contextName);
484         }
485         
486         // Then update the reference to the new adaptor server.
487 //
488 Object [] params = {this, contextName, oids};
489         String [] signature = {"com.sun.jmx.snmp.agent.SnmpMibAgent", "java.lang.String", oids.getClass().getName()};
490         try {
491             adaptor = (SnmpMibHandler)(server.invoke(name, "addMib", params,
492                              signature));
493         } catch (InstanceNotFoundException e) {
494             throw new InstanceNotFoundException (name.toString());
495         } catch (ReflectionException e) {
496             throw new ServiceNotFoundException (name.toString());
497         } catch (MBeanException e) {
498             // Should never occur...
499 }
500         
501         adaptorName = name;
502     }
503
504     /**
505      * Indicates whether or not the MIB module is bound to a SNMP protocol
506      * adaptor.
507      * As a reminder, only bound MIBs can be accessed through SNMP protocol
508      * adaptor.
509      *
510      * @return <CODE>true</CODE> if the MIB module is bound,
511      * <CODE>false</CODE> otherwise.
512      */
513     public boolean getBindingState() {
514         if (adaptor == null)
515             return false;
516         else
517             return true;
518     }
519
520     /**
521      * Gets the MIB name.
522      *
523      * @return The MIB name.
524      */
525     public String getMibName() {
526         return mibName;
527     }
528     
529     /**
530      * This is a factory method for creating new SnmpMibRequest objects.
531      * @param reqPdu The received PDU.
532      * @param vblist The vector of SnmpVarBind objects in which the
533      * MIB concerned by this request is involved.
534      * @param version The protocol version of the SNMP request.
535      * @param userData User allocated contextual data.
536      *
537      * @return A new SnmpMibRequest object.
538      *
539      * @since 1.5
540      **/
541     public static SnmpMibRequest newMibRequest(SnmpPdu reqPdu,
542                            Vector vblist,
543                            int version,
544                            Object userData)
545     {
546     return new SnmpMibRequestImpl(null,
547                       reqPdu,
548                       vblist,
549                       version,
550                       userData,
551                       null,
552                       SnmpDefinitions.noAuthNoPriv,
553                       getSecurityModel(version),
554                       null,null);
555     }
556     /**
557      * This is a factory method for creating new SnmpMibRequest objects.
558      * @param engine The local engine.
559      * @param reqPdu The received pdu.
560      * @param vblist The vector of SnmpVarBind objects in which the
561      * MIB concerned by this request is involved.
562      * @param version The protocol version of the SNMP request.
563      * @param userData User allocated contextual data.
564      *
565      * @return A new SnmpMibRequest object.
566      *
567      * @since 1.5
568      **/
569     public static SnmpMibRequest newMibRequest(SnmpEngine engine,
570                            SnmpPdu reqPdu,
571                            Vector vblist,
572                            int version,
573                            Object userData,
574                            String principal,
575                            int securityLevel,
576                            int securityModel,
577                            byte[] contextName,
578                            byte[] accessContextName) {
579     return new SnmpMibRequestImpl(engine,
580                       reqPdu,
581                       vblist,
582                       version,
583                       userData,
584                       principal,
585                       securityLevel,
586                       securityModel,
587                       contextName,
588                       accessContextName);
589     }
590     // ---------------------------------------------------------------------
591 // PACKAGE METHODS
592 // ---------------------------------------------------------------------
593
594     /**
595      * Processes a <CODE>getBulk</CODE> operation using call to
596      * <CODE>getNext</CODE>.
597      * The method implements the <CODE>getBulk</CODE> operation by calling
598      * appropriately the <CODE>getNext</CODE> method.
599      *
600      * @param req The SnmpMibRequest containing the variable list to be
601      * retrieved.
602      *
603      * @param nonRepeat The number of variables, starting with the first
604      * variable in the variable-bindings, for which a single lexicographic
605      * successor is requested.
606      *
607      * @param maxRepeat The number of lexicographic successors
608      * requested for each of the last R variables. R is the number of
609      * variables following the first nonRepeat variables for which
610      * multiple lexicographic successors are requested.
611      *
612      * @return The variable list containing returned values.
613      *
614      * @exception SnmpStatusException An error occured during the operation.
615      */
616     void getBulkWithGetNext(SnmpMibRequest req, int nonRepeat, int maxRepeat)
617     throws SnmpStatusException {
618     final Vector list = req.getSubList();
619
620         // RFC 1905, Section 4.2.3, p14
621 final int L = list.size() ;
622         final int N = Math.max(Math.min(nonRepeat, L), 0) ;
623         final int M = Math.max(maxRepeat, 0) ;
624         final int R = L - N ;
625     
626         // Let's build the varBindList for the response pdu
627 //
628 // int errorStatus = SnmpDefinitions.snmpRspNoError ;
629 // int errorIndex = 0 ;
630 if (L != 0) {
631       
632             // Non-repeaters and first row of repeaters
633 //
634 getNext(req);
635     
636             // Now the remaining repeaters
637 //
638 Vector repeaters= splitFrom(list, N);
639         SnmpMibRequestImpl repeatedReq =
640         new SnmpMibRequestImpl(req.getEngine(),
641                        req.getPdu(),
642                        repeaters,
643                        SnmpDefinitions.snmpVersionTwo,
644                        req.getUserData(),
645                        req.getPrincipal(),
646                        req.getSecurityLevel(),
647                        req.getSecurityModel(),
648                        req.getContextName(),
649                        req.getAccessContextName());
650             for (int i = 2 ; i <= M ; i++) {
651                 getNext(repeatedReq);
652                 concatVector(req, repeaters);
653             }
654         }
655     }
656     
657      
658     // ---------------------------------------------------------------------
659 // PRIVATE METHODS
660 // ---------------------------------------------------------------------
661
662     /**
663      * This method creates a new Vector which does not contain the first
664      * element up to the specified limit.
665      *
666      * @param original The original vector.
667      * @param limit The limit.
668      */
669     private Vector splitFrom(Vector original, int limit) {
670         
671         int max= original.size();
672         Vector result= new Vector (max - limit);
673         int i= limit;
674         
675         // Ok the loop looks a bit strange. But in order to improve the
676 // perf, we try to avoid reference to the limit variable from
677 // within the loop ...
678 //
679 for(Enumeration e= original.elements(); e.hasMoreElements(); --i) {
680             SnmpVarBind var= (SnmpVarBind) e.nextElement();
681             if (i >0)
682                 continue;
683             result.addElement(new SnmpVarBind(var.oid, var.value));
684         }
685         return result;
686     }
687   
688     private void concatVector(SnmpMibRequest req, Vector source) {
689         for(Enumeration e= source.elements(); e.hasMoreElements(); ) {
690             SnmpVarBind var= (SnmpVarBind) e.nextElement();
691             // We need to duplicate the SnmpVarBind otherwise it is going
692 // to be overloaded by the next get Next ...
693 req.addVarBind(new SnmpVarBind(var.oid, var.value));
694         }
695     }
696
697     private void concatVector(Vector target, Vector source) {
698         for(Enumeration e= source.elements(); e.hasMoreElements(); ) {
699             SnmpVarBind var= (SnmpVarBind) e.nextElement();
700             // We need to duplicate the SnmpVarBind otherwise it is going
701 // to be overloaded by the next get Next ...
702 target.addElement(new SnmpVarBind(var.oid, var.value));
703         }
704     }
705
706     static private Vector vector(Enumeration e) {
707     if (e == null) return null;
708     Vector v = new Vector ();
709     while (e.hasMoreElements()) v.addElement(e.nextElement());
710     return v;
711     }
712
713     private static int getSecurityModel(int version) {
714     switch(version) {
715     case SnmpDefinitions.snmpVersionOne:
716         return SnmpDefinitions.snmpV1SecurityModel;
717     default:
718         return SnmpDefinitions.snmpV2SecurityModel;
719     }
720     }
721
722     // ---------------------------------------------------------------------
723 // PROTECTED VARIABLES
724 // ---------------------------------------------------------------------
725
726     /**
727      * The object name of the MIB.
728      * @serial
729      */
730     protected String mibName;
731     
732     /**
733      * The reference to the MBean server.
734      * @serial
735      */
736     protected MBeanServer server;
737   
738     // ---------------------------------------------------------------------
739 // PRIVATE VARIABLES
740 // ---------------------------------------------------------------------
741
742     /**
743      * The object name of the SNMP protocol adaptor.
744      * @serial
745      */
746     private ObjectName adaptorName;
747     
748     /**
749      * The reference to the SNMP stack.
750      */
751     private transient SnmpMibHandler adaptor;
752 }
753

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