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| package sNMP4JHelper;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.*;
import org.snmp4j.transport.DefaultUdpTransportMapping;
public class SNMP4JHelper {
public static final String READ_COMMUNITY = "public";
public static final String WRITE_COMMUNITY= "private";
public static final int mSNMPVersion =0; // 0 represents SNMP version=1
public static final String OID_UPS_OUTLET_GROUP1 =
"1.3.6.1.4.1.318.1.1.1.12.3.2.1.3.1";
public static final String OID_SYS_DESCR="1.3.6.1.2.1.1.1.0";
public static void main(String[] args)
{
try
{
String strIPAddress = "127.0.0.1";
SNMP4JHelper objSNMP = new SNMP4JHelper();
//objSNMP.snmpSet();
////////////////////////////////////////////
//Set Value=2 to trun OFF UPS OUTLET Group1
//Value=1 to trun ON UPS OUTLET Group1
//////////////////////////////////////////
int Value = 2;
//objSNMP.snmpSet(strIPAddress, WRITE_COMMUNITY,OID_UPS_OUTLET_GROUP1, Value);
//////////////////////////////////////////////////////////
//Get Basic state of UPS
/////////////////////////////////////////////////////////
String batteryCap =objSNMP.snmpGet(strIPAddress,READ_COMMUNITY,OID_SYS_DESCR);
}
catch (Exception e)
{
e.printStackTrace();
}
}
/*
* The following code valid only SNMP version1. This
* method is very useful to set a parameter on remote device.
*/
public void snmpSet(String strAddress, String community, String strOID, int Value)
{
strAddress= strAddress+"/"+161;
Address targetAddress = GenericAddress.parse(strAddress);
Snmp snmp;
try
{
TransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
transport.listen();
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(targetAddress);
target.setRetries(2);
target.setTimeout(5000);
target.setVersion(SnmpConstants.version1);
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(strOID), new Integer32(Value)));
pdu.setType(PDU.SET);
ResponseListener listener = new ResponseListener() {
public void onResponse(ResponseEvent event) {
// Always cancel async request when response has been received
// otherwise a memory leak is created! Not canceling a request
// immediately can be useful when sending a request to a broadcast
// address.
((Snmp)event.getSource()).cancel(event.getRequest(), this);
System.out.println("Set Status is:"+event.getResponse().getErrorStatusText());
}
};
snmp.send(pdu, target, null, listener);
snmp.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
/*
* The code is valid only SNMP version1. SnmpGet method
* return Response for given OID from the Device.
*/
public String snmpGet(String strAddress, String community, String strOID)
{
String str="";
try
{
OctetString community1 = new OctetString(community);
strAddress= strAddress+"/" + 161;
Address targetaddress = new UdpAddress(strAddress);
TransportMapping transport = new DefaultUdpTransportMapping();
transport.listen();
CommunityTarget comtarget = new CommunityTarget();
comtarget.setCommunity(community1);
comtarget.setVersion(SnmpConstants.version1);
comtarget.setAddress(targetaddress);
comtarget.setRetries(2);
comtarget.setTimeout(5000);
PDU pdu = new PDU();
ResponseEvent response;
Snmp snmp;
pdu.add(new VariableBinding(new OID(strOID)));
pdu.setType(PDU.GET);
snmp = new Snmp(transport);
response = snmp.get(pdu,comtarget);
if(response != null)
{
if(response.getResponse().getErrorStatusText().equalsIgnoreCase("Success"))
{
PDU pduresponse=response.getResponse();
str=pduresponse.getVariableBindings().firstElement().toString();
if(str.contains("="))
{
int len = str.indexOf("=");
str=str.substring(len+1, str.length());
}
}
}
else
{
System.out.println("Feeling like a TimeOut occured ");
}
snmp.close();
} catch(Exception e) { e.printStackTrace(); }
System.out.println("Response="+str);
return str;
}
} |
