String event = arg("workerEvent");
  if ( event == "init" || event == "done")
    return;
  
  WindowContext context = argObj("windowContext");
  Worker worker = argObj("worker");
  boolean setRefresh = false;
  
  if ( event == "longRunningTask" || event == "alreadyRunning")
  {
    if ( worker.isDone() && event=="longRunningTask" )
      return;
    
    Text  banner = context.get("/mainTabs/Host/toolbar/banner");
    banner.setText("MySQL (loading)");
  }
  else if ( event == "backgroundTask" )
  {
    final DB db = new SQLLoggingDB((SQLLoggingDB)context.get("db"));
    worker.setProperty("db", db);
    worker.setProperty("waitOperation","host information");

    db.useCache(false);
    
    DB.AutoCleanupTX tx = new DB.AutoCleanupTX() {
        public void execute() throws Exception
        {
          DB.Result version = db.execute("select version()");
          DB.Result vars = db.execute("show variables");
          DB.Result processes = db.execute("show full processlist");
          DB.Result status = db.execute("show /*!50002 global*/ status");
          HashObject ho = new HashObject();
          ho.put("version", version);
          ho.put("vars", vars);
          ho.put("processes", processes);
          ho.put("status", status);
          
          /*try
          {
            Thread.sleep(5000);
          } catch (Exception e) {}*/
        
          publish(ho);
        }
      };
    
    db.execute(tx);
  }
  else if ( event == "update" )
  {
    HashObject resultSets = (HashObject)((java.util.List)argObj("taskResult")).get(0);

    DB.Result version =  resultSets.getObject("version");
    DB.Result vars =  resultSets.getObject("vars");
    DB.Result processes =  resultSets.getObject("processes");
    DB.Result status = resultSets.getObject("status");
    
    Text  banner = context.get("/mainTabs/Host/toolbar/banner");
    banner.setText("MySQL " + version.first().get(0));
    Table varTable = context.get("/mainTabs/Host/tabs/Variables/table");
    TableUtils.populate(varTable, vars);
    Table processTable = context.get("/mainTabs/Host/tabs/Processes/table");
    TableUtils.populate(processTable, processes);
    Table statusTable = context.get("/mainTabs/Host/tabs/Status/table");
    TableUtils.populate(statusTable, status);
    setRefresh = true;
    
  }
  else if ( event == "cancelled" )
  {
    DB db = worker.getProperty("db");
    if ( db != null )
      db.cancel();
    
    Text  banner = context.get("/mainTabs/Host/toolbar/banner");
    banner.setText("MySQL (load canceled)");
    setRefresh = true;

  }
  
  if ( setRefresh )
  {
    //let the refresh button know what to do
    Panel tab = context.get("/mainTabs/Host");
    tab.setProperty("refreshScript", "loadHostInfoMySQLWorker");
    tab.setProperty("refreshArgs", args());
  }