import java.util.*;
  
  String event = arg("workerEvent");
  
  if ( event == "init" || event == "done")
  {
    return;
  }
  
  WindowContext context = argObj("windowContext");
  Text banner = context.get("/mainTabs/Data/toolbar/banner");
  Panel tab = context.get("/mainTabs/Data");
  Worker worker = argObj("worker");
  Table table = context.get("/mainTabs/Data/table");
  Toolbar tb = context.get("/mainTabs/Data/toolbar");
  final String tableName = arg("tableName");
  final String dbName = arg("dbName");
  boolean setRefresh = false;

  
  if ( event == "longRunningTask" || event == "alreadyRunning")
  {
    if ( worker.isDone() && event=="longRunningTask" )
      return;
    
    if ( tableName.equals((String)context.get("currentTable")) &&
         dbName.equals((String)context.get("currentDB")))
    {
      banner.setText(dbName + "." + tableName + " (loading)");
      table.clear();
      tb.updateUI();
    }
  }
  else if ( event == "cancelled" )
  {
    DB db = worker.getProperty("db");
    
    if ( db != null )
      db.cancel();
    
    if ( tableName.equals((String)context.get("currentTable")) &&
         dbName.equals((String)context.get("currentDB")))
    {
      banner.setText(dbName + "." + tableName + " (load canceled)");
      setRefresh = true;
    }
    
  }
  else if ( event == "backgroundTask" )
  {
    final DB db = new SQLLoggingDB((SQLLoggingDB)context.get("db"));
    worker.setProperty("db", db);
    worker.setProperty("waitOperation", "select count(*) from " + dbName + "." + tableName +"; select * from " + dbName + "." + tableName);
    
    DB.AutoCleanupTX tx = new DB.AutoCleanupTX() {
      public void execute() {
        DB.Result count = db.execute("select count(*) from `" + dbName + "`.`" + tableName + "`");
        DB.Result data = db.execute("select * from `" + dbName + "`.`" + tableName + "` limit 50");
        HashObject ho = new HashObject();
        ho.put("count", count);
        ho.put("data", data);
        
        /*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 data = resultSets.getObject("data");
    DB.Result count = resultSets.getObject("count");

    if ( tableName.equals((String)context.get("currentTable")) &&
         dbName.equals((String)context.get("currentDB")))
    {
      banner.setText(dbName + "." + tableName + ": " + count.first().get(0) + " total rows");
      TableUtils.populate(table, data);
      setRefresh = true;
    }

  }
  
  if ( setRefresh )
  {
    tab.setProperty("refreshScript", "loadTableDataMySQLWorker");
    tab.setProperty("refreshArgs", args());
  }