Execute JavaScript and get the result synchronous from server

answered 2013-11-02 09:09:26 +0800

jasonhoo
104 ● 4

updated 2013-12-13 04:08:24 +0800

I implements it as follow(PS: ctx is a vary in session):

public Object evalJavaScriptSynchronized(String script)
{
   script = "_data=" + script + "zAu.send(new zk.Event(null,\"onResult\",{result:__data},{toServer:true}));";  // Use zAu.send to return the result.
   Clients.evalJavaScript(script);
   Clients.showBusy("Wait for JavaScript's result...");
   try
   {
      Executions.wait(ctx.mutex); // Wait for JavaScript executed synchronized.
   }
   catch(Exception e)
   {}
   Clients.clearBusy();
   return ctx.result;  // Return the result. 
}

public class ResultAuService
    implements AuService
{
  @Override
  public boolean service(AuRequest request, boolean everError)
  {
    String command = request.getCommand();
    if ("onResult".equals(command))
    {
      ctx.jsResult = request.getData().get("result");
      Executions.notifyAll(ctx.mutex);
      return true;
    }
    return false;
  }
}