/*    $Id: snmpPollerDemo.src,v 1.3 2002/09/09 05:36:28 tonyjpaul Exp $*//* * @(#)snmpPollerDemo.java * Copyright (c) 1996-2002 AdventNet, Inc. All Rights Reserved. * Please read the COPYRIGHTS file for more details. *//**  *  An example of using the SnmpPoller object in your code. *  This is an applet example.   *  Please refer snmpPollerDemo.html for parameters. **/import java.awt.*;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.applet.Applet;import com.adventnet.snmp.beans.*;public class snmpPollerDemo extends Applet implements ActionListener {    // Some AWT widgets we'll use    Label l1;    Button b1;    TextField t1;    SnmpPoller poller; // The SNMP poller instance we'll use    /** The init method is first called for applets.  **/    public void init() {        l1 = new Label ( getParameter("OID") );        b1 = new Button();        b1.setLabel("Stop Polling");        t1 = new TextField("The data from the agent is shown here");        //Listen for actions on button        b1.addActionListener(this);        //Add Components using the default FlowLayout.         add(l1);        add(t1);        add(b1);    }    /** The start method is called when page with applet is visited.  **/    public void start() {      try {  // setup the poller object as desired - use applet parameters        poller = new SnmpPoller(this);        // load MIB to allow us to use names        showStatus("Loading MIBs...");  // show something on the status bar        if(getParameter("MIBS") != null)			poller.loadMibs( getParameter("MIBS") );          showStatus("Loading MIBs done.");        if(getParameter("HOSTNAME") != null)			poller.setTargetHost( getParameter("HOSTNAME") );        if(getParameter("COMMUNITY") != null)			poller.setCommunity( getParameter("COMMUNITY") );        if(getParameter("OID") != null)			poller.setObjectID( getParameter("OID") );        if(getParameter("SNMP_PORT") != null )            poller.setTargetPort(Integer.parseInt(getParameter("SNMP_PORT")));        if(getParameter("USERNAME") != null)			poller.setPrincipal( getParameter("USERNAME"));        if(getParameter("AUTHPASS") != null)			poller.setAuthPassword( getParameter("AUTHPASS"));        String protocol =  getParameter("AUTHPROTOCOL");        if(protocol!=null) {        if(protocol.equals("SHA"))            poller.setAuthProtocol(SnmpServer.SHA_AUTH);        else            poller.setAuthProtocol(SnmpServer.MD5_AUTH);        }        if(getParameter("PRIVPASS") != null)			poller.setPrivPassword( getParameter("PRIVPASS"));        //poller.setSecurityLevel((byte)Integer.parseInt(getParameter("SEC_LEVEL")));        if(getParameter("SNMP_VERSION") != null)			poller.setSnmpVersion(Integer.parseInt(getParameter("SNMP_VERSION")));    } catch (Exception ex) {        System.err.println("Error in starting applet: "+ex+":"+ex.getMessage());    }      	if(poller.getSnmpVersion()==3) {		poller.create_v3_tables();	}    // We need to add a listener to listen for responses    ResultAdapter listener = new ResultAdapter() {      // This method will be invoked when the response is received        public void setResult( ResultEvent e ) {        try {             t1.setText(e.getStringValue());        } catch (DataException de) {            t1.setText("Error in getting agent data: "+de +                       e.getErrorString());        }        }    };    poller.addResultListener(listener);  // listen for response events    }      /** This method is called when the button is clicked **/    public void actionPerformed(ActionEvent e) {              if (poller.getPollingStatus()) {  // if polling is going on, stop it        poller.stopPolling();        b1.setLabel("Start Polling");      } else { // else restart it        poller.restartPolling();        b1.setLabel("Stop Polling");    }     }    }