snmp4j SnmpGetExample

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SnmpGetExample {
    private static String tempval;
    private static String ipAddress = "127.0.0.1";

    private static String port = "161";

    // OID of MIB RFC 1213; Scalar Object = .iso.org.dod.internet.mgmt.mib-2.system.sysDescr.0
    private static String oidValue = ".1.3.6.1.2.1.1.1.0"; // ends with 0 for scalar object

    private static int snmpVersion = SnmpConstants.version1;

    private static String community = "public";

    public static void main(String[] args) throws Exception {
        System.out.println("SNMP GET Demo");

        // Create TransportMapping and Listen
        TransportMapping transport = new DefaultUdpTransportMapping();
        transport.listen();

        // Create Target Address object
        CommunityTarget comtarget = new CommunityTarget();
        comtarget.setCommunity(new OctetString(community));
        comtarget.setVersion(snmpVersion);
        comtarget.setAddress(new UdpAddress(ipAddress + "/" + port));
        comtarget.setRetries(2);
        comtarget.setTimeout(1000);

        // Create the PDU object
        PDU pdu = new PDU();
        pdu.add(new VariableBinding(new OID(oidValue)));
        pdu.setType(PDU.GET);
        pdu.setRequestID(new Integer32(1));

        // Create Snmp object for sending data to Agent
        Snmp snmp = new Snmp(transport);

        System.out.println("Sending Request to Agent...");
        ResponseEvent response = snmp.get(pdu, comtarget);

        // Process Agent Response
        if (response != null) {
            System.out.println("Got Response from Agent");
            PDU responsePDU = response.getResponse();

            if (responsePDU != null) {
                int errorStatus = responsePDU.getErrorStatus();
                int errorIndex = responsePDU.getErrorIndex();
                String errorStatusText = responsePDU.getErrorStatusText();

                if (errorStatus == PDU.noError) {
                    //System.out.println("Snmp Get Response = " + responsePDU.getVariableBindings());
                    System.out.println("response pdu size is " + responsePDU.size());
                    for (int i = 0; i < responsePDU.size(); i++) {
                        VariableBinding vb = responsePDU.get(i);
                        //System.out.println(vb.getOid() + " = " + vb.getVariable());
                        tempval = vb.toValueString();
                        System.out.println(tempval);
                    }

                } else {
                    System.out.println("Error: Request Failed");
                    System.out.println("Error Status = " + errorStatus);
                    System.out.println("Error Index = " + errorIndex);
                    System.out.println("Error Status Text = " + errorStatusText);
                }
            } else {
                System.out.println("Error: Response PDU is null");
            }
        } else {
            System.out.println("Error: Agent Timeout... ");
        }
        snmp.close();
    }
}