Java example source code file (SnmpSubBulkRequestHandler.java)
The SnmpSubBulkRequestHandler.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 import
//
import java.util.Enumeration;
import java.util.logging.Level;
// jmx imports
//
import com.sun.jmx.snmp.SnmpPdu;
import com.sun.jmx.snmp.SnmpVarBind;
import com.sun.jmx.snmp.SnmpOid;
import com.sun.jmx.snmp.SnmpValue;
import com.sun.jmx.snmp.SnmpDefinitions;
import com.sun.jmx.snmp.SnmpStatusException;
import com.sun.jmx.snmp.SnmpEngine;
// 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.internal.SnmpIncomingRequest;
import com.sun.jmx.snmp.ThreadContext;
class SnmpSubBulkRequestHandler extends SnmpSubRequestHandler {
private SnmpAdaptorServer server = null;
/**
* The constructor initialize the subrequest with the whole varbind list contained
* in the original request.
*/
protected SnmpSubBulkRequestHandler(SnmpEngine engine,
SnmpAdaptorServer server,
SnmpIncomingRequest incRequest,
SnmpMibAgent agent,
SnmpPdu req,
int nonRepeat,
int maxRepeat,
int R) {
super(engine, incRequest, agent, req);
init(server, req, nonRepeat, maxRepeat, R);
}
/**
* The constructor initialize the subrequest with the whole varbind list contained
* in the original request.
*/
protected SnmpSubBulkRequestHandler(SnmpAdaptorServer server,
SnmpMibAgent agent,
SnmpPdu req,
int nonRepeat,
int maxRepeat,
int R) {
super(agent, req);
init(server, req, nonRepeat, maxRepeat, R);
}
@Override
public void run() {
size= varBind.size();
try {
// Invoke a getBulk operation
//
/* 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() +
"]:getBulk operation on " + agent.getMibName());
}
agent.getBulk(createMibRequest(varBind,version,data),
nonRepeat, maxRepeat);
} 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");
}
}
private void init(SnmpAdaptorServer server,
SnmpPdu req,
int nonRepeat,
int maxRepeat,
int R) {
this.server = server;
this.nonRepeat= nonRepeat;
this.maxRepeat= maxRepeat;
this.globalR= R;
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);
}
}
/**
* The method updates find out which element to use at update time. Handle oid overlapping as well
*/
private SnmpVarBind findVarBind(SnmpVarBind element,
SnmpVarBind result) {
if (element == null) return null;
if (result.oid == null) {
return element;
}
if (element.value == SnmpVarBind.endOfMibView) return result;
if (result.value == SnmpVarBind.endOfMibView) return element;
final SnmpValue val = result.value;
int comp = element.oid.compareTo(result.oid);
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","Comparing OID element : " + element.oid +
" with result : " + result.oid);
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","Values element : " + element.value +
" result : " + result.value);
}
if (comp < 0) {
// Take the smallest (lexicographically)
//
return element;
}
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(),
"findVarBind"," oid overlapping. Oid : " +
element.oid + "value :" + element.value);
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","Already present varBind : " +
result);
}
SnmpOid oid = result.oid;
SnmpMibAgent deeperAgent = server.getAgentMib(oid);
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","Deeper agent : " + deeperAgent);
}
if(deeperAgent == agent) {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","The current agent is the deeper one. Update the value with the current one");
}
return element;
} else {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","The current agent is not the deeper one. return the previous one.");
}
return result;
}
/*
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("findVarBind", "Biggest priority value is : " +
realValue.value);
return realValue;
*/
}
else {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"findVarBind","The right varBind is the already present one");
}
return result;
}
}
}
/**
* 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.
*/
@Override
protected void updateResult(SnmpVarBind[] result) {
// we can assume that the run method is over ...
//
final Enumeration<SnmpVarBind> e= varBind.elements();
final int max= result.length;
// First go through all the values once ...
for(int i=0; i < size; i++) {
// May be we should control the position ...
//
if (e.hasMoreElements() == false)
return;
// bugId 4641694: must check position in order to avoid
// ArrayIndexOutOfBoundException
final int pos=translation[i];
if (pos >= max) {
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINEST)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINEST, SnmpSubRequestHandler.class.getName(),
"updateResult","Position '"+pos+"' is out of bound...");
}
continue;
}
final SnmpVarBind element= e.nextElement();
if (element == null) continue;
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"updateResult","Non repeaters Current element : " +
element + " from agent : " + agent);
}
final SnmpVarBind res = findVarBind(element,result[pos]);
if(res == null) continue;
result[pos] = res;
}
// Now update the values which have been repeated
// more than once.
int localR= size - nonRepeat;
for (int i = 2 ; i <= maxRepeat ; i++) {
for (int r = 0 ; r < localR ; r++) {
final int pos = (i-1)* globalR + translation[nonRepeat + r] ;
if (pos >= max)
return;
if (e.hasMoreElements() ==false)
return;
final SnmpVarBind element= e.nextElement();
if (element == null) continue;
if (SNMP_ADAPTOR_LOGGER.isLoggable(Level.FINER)) {
SNMP_ADAPTOR_LOGGER.logp(Level.FINER, SnmpSubRequestHandler.class.getName(),
"updateResult","Repeaters Current element : " +
element + " from agent : " + agent);
}
final SnmpVarBind res = findVarBind(element, result[pos]);
if(res == null) continue;
result[pos] = res;
}
}
}
// PROTECTED VARIABLES
//------------------
/**
* Specific to the sub request
*/
protected int nonRepeat=0;
protected int maxRepeat=0;
/**
* R as defined in RCF 1902 for the global request the sub-request is associated to.
*/
protected int globalR=0;
protected int size=0;
}
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