Java example source code file (SnmpSubNextRequestHandler.java)
The SnmpSubNextRequestHandler.java Java example source code
/*
* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package com.sun.jmx.snmp.daemon;
// java imports
//
import java.util.logging.Level;
import java.util.Vector;
// jmx imports
//
import com.sun.jmx.snmp.SnmpEngine;
import com.sun.jmx.snmp.SnmpPdu;
import com.sun.jmx.snmp.SnmpValue;
import com.sun.jmx.snmp.SnmpVarBind;
import com.sun.jmx.snmp.SnmpVarBindList;
import com.sun.jmx.snmp.SnmpOid;
import com.sun.jmx.snmp.SnmpDefinitions;
import com.sun.jmx.snmp.SnmpStatusException;
// SNMP Runtime import
//
import static com.sun.jmx.defaults.JmxProperties.SNMP_ADAPTOR_LOGGER;
import com.sun.jmx.snmp.agent.SnmpMibAgent;
import com.sun.jmx.snmp.agent.SnmpMibRequest;
import com.sun.jmx.snmp.daemon.SnmpAdaptorServer;
import com.sun.jmx.snmp.internal.SnmpIncomingRequest;
/* NPCTE fix for bugId 4492741, esc 0 */
import com.sun.jmx.snmp.ThreadContext;
/* end of NPCTE fix for bugId 4492741 */
class SnmpSubNextRequestHandler extends SnmpSubRequestHandler {
private SnmpAdaptorServer server = null;
/**
* The constructor initialize the subrequest with the whole varbind
* list contained in the original request.
*/
protected SnmpSubNextRequestHandler(SnmpAdaptorServer server,
SnmpMibAgent agent,
SnmpPdu req) {
super(agent,req);
init(req, server);
}
protected SnmpSubNextRequestHandler(SnmpEngine engine,
SnmpAdaptorServer server,
SnmpIncomingRequest incRequest,
SnmpMibAgent agent,
SnmpPdu req) {
super(engine, incRequest, agent, req);
init(req, server);
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINEST)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST, SnmpSubNextRequestHandler.class.getName(),
"SnmpSubNextRequestHandler", "Constructor : " + this);
}
}
private void init(SnmpPdu req, SnmpAdaptorServer server) {
this.server = server;
// The translation table is easy in this case ...
//
final int max= translation.length;
final SnmpVarBind[] list= req.varBindList;
final NonSyncVector<SnmpVarBind> nonSyncVarBind =
((NonSyncVector<SnmpVarBind>)varBind);
for(int i=0; i < max; i++) {
translation[i]= i;
// we need to allocate a new SnmpVarBind. Otherwise the first
// sub request will modify the list...
//
final SnmpVarBind newVarBind =
new SnmpVarBind(list[i].oid, list[i].value);
nonSyncVarBind.addNonSyncElement(newVarBind);
}
}
public void run() {
try {
/* NPCTE fix for bugId 4492741, esc 0, 16-August-2001 */
final ThreadContext oldContext =
ThreadContext.push("SnmpUserData",data);
try {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"run", "[" + Thread.currentThread() +
"]:getNext operation on " + agent.getMibName());
}
// Always call with V2. So the merge of the responses will
// be easier.
//
agent.getNext(createMibRequest(varBind, snmpVersionTwo, data));
} finally {
ThreadContext.restore(oldContext);
}
/* end of NPCTE fix for bugId 4492741 */
} catch(SnmpStatusException x) {
errorStatus = x.getStatus() ;
errorIndex= x.getErrorIndex();
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINEST)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST, SnmpSubRequestHandler.class.getName(),
"run", "[" + Thread.currentThread() +
"]:an Snmp error occurred during the operation", x);
}
}
catch(Exception x) {
errorStatus = SnmpDefinitions.snmpRspGenErr ;
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINEST)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST, SnmpSubRequestHandler.class.getName(),
"run", "[" + Thread.currentThread() +
"]:a generic error occurred during the operation", x);
}
}
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"run", "[" + Thread.currentThread() + "]:operation completed");
}
}
/**
* The method updates the varbind list of the subrequest.
*/
protected void updateRequest(SnmpVarBind var, int pos) {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINEST)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST, SnmpSubRequestHandler.class.getName(),
"updateRequest", "Copy :" + var);
}
int size= varBind.size();
translation[size]= pos;
final SnmpVarBind newVarBind =
new SnmpVarBind(var.oid, var.value);
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINEST)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST, SnmpSubRequestHandler.class.getName(),
"updateRequest", "Copied :" + newVarBind);
}
varBind.addElement(newVarBind);
}
/**
* The method updates a given var bind list with the result of a
* previsouly invoked operation.
* Prior to calling the method, one must make sure that the operation was
* successful. As such the method getErrorIndex or getErrorStatus should be
* called.
*/
protected void updateResult(SnmpVarBind[] result) {
final int max=varBind.size();
for(int i= 0; i< max ; i++) {
// May be we should control the position ...
//
final int index= translation[i];
final SnmpVarBind elmt=
(SnmpVarBind)((NonSyncVector)varBind).elementAtNonSync(i);
final SnmpVarBind vb= result[index];
if (vb == null) {
result[index]= elmt;
/* NPCTE fix for bugid 4381195 esc 0. <J.C.> < 17-Oct-2000> */
// if ((elmt != null) && (elmt.value == null) &&
// (version == snmpVersionTwo))
// elmt.value = SnmpVarBind.endOfMibView;
/* end of NPCTE fix for bugid 4381195 */
continue;
}
final SnmpValue val= vb.value;
if ((val == null)|| (val == SnmpVarBind.endOfMibView)){
/* NPCTE fix for bugid 4381195 esc 0. <J.C.> < 17-Oct-2000> */
if ((elmt != null) &&
(elmt.value != SnmpVarBind.endOfMibView))
result[index]= elmt;
// else if ((val == null) && (version == snmpVersionTwo))
// vb.value = SnmpVarBind.endOfMibView;
continue;
/* end of NPCTE fix for bugid 4381195 */
}
/* NPCTE fix for bugid 4381195 esc 0. <J.C.> < 17-Oct-2000> */
if (elmt == null) continue;
/* end of NPCTE fix for bugid 4381195 */
if (elmt.value == SnmpVarBind.endOfMibView) continue;
// Now we need to take the smallest oid ...
//
int comp = elmt.oid.compareTo(vb.oid);
if (comp < 0) {
// Take the smallest (lexicographically)
//
result[index]= elmt;
}
else {
if(comp == 0) {
// Must compare agent used for reply
// Take the deeper within the reply
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"updateResult"," oid overlapping. Oid : " +
elmt.oid + "value :" + elmt.value);
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"updateResult","Already present varBind : " +
vb);
}
SnmpOid oid = vb.oid;
SnmpMibAgent deeperAgent = server.getAgentMib(oid);
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"updateResult","Deeper agent : " + deeperAgent);
}
if(deeperAgent == agent) {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"updateResult","The current agent is the deeper one. Update the value with the current one");
}
result[index].value = elmt.value;
}
/*
Vector v = new Vector();
SnmpMibRequest getReq = createMibRequest(v,
version,
null);
SnmpVarBind realValue = new SnmpVarBind(oid);
getReq.addVarBind(realValue);
try {
deeperAgent.get(getReq);
} catch(SnmpStatusException e) {
e.printStackTrace();
}
if(isDebugOn())
trace("updateResult", "Biggest priority value is : " +
realValue.value);
result[index].value = realValue.value;
*/
}
}
}
}
}
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