onProcessMessageReceived not called

[Nidhi]

I am using separate sub-process executable approach for my application.
When I am passing the messages at runtime using CefProcessMessage, it is observed that OnProcessMessageReceived function in render process is not called.
Do I need to pass the message using command line when I am mentioning the sub process path?

[magreenblatt]

How did you verify that OnProcessMessageReceived is not called? Are you passing a CefApp instance to CefExecuteProcess and implementing CefApp::GetRenderProcessHandler?

[Nidhi]

yes, the issue arrives when I am using sub process executable method while it is working fine for single process.

[magreenblatt]

You didn't answer the question:

How did you verify that OnProcessMessageReceived is not called?

[Nidhi]

I have implemented the render process in my sub-executable process. We are trying to implement a chat system using CEF where on button click a message is passed to CEF process, the code is mentioned below:-

Code: Select all

void sendMessagetoRender(std::string js_string)
  {
     CefRefPtr<CefProcessMessage> msg = CefProcessMessage::Create(js_string);
     CefRefPtr<CefListValue> args = msg->GetArgumentList();
     args->SetString(0, "my string");
     args->SetInt(0, 10);
     SimpleHandler* simpleglobalHandler = SimpleHandler::GetInstance();
     CefRefPtr<CefBrowser> browser = simpleglobalHandler->GetBrowser();
     browser->SendProcessMessage(PID_RENDERER, msg);
  }

Now when I am debugging the code, it is observed that onProcessMessageReceived for render process which is implemented in sub executable process is not called.

My next question might sound very wasteful, but please let me know, when I am receiving the string from render process to browser process how will I send the data back to my native application because the onProcessMessageReceived in browser process will return bool value. Please help me.

[amaitland]

It's still not clear you've answered the question. Are you specifically attaching the debugger to the sub process?

You can use the renderer-startup-dialog command line argument to help attach the debugger.

[Nidhi]

Yes, I have specifically attached the debugger to the render/sub-process

[amaitland]

Great. Make sure your passing an instance of `CefApp` to `CefExecuteProcess` and `CefApp::GetRenderProcessHandler` returns an instance of your `CefRenderProcessHandler`.

[Nidhi]

I already did that. So the issue occurs when I am passing runtime message not the startup message.

[amaitland]

Firstly you should be clearer when asking a question, include what you've tried and what works. Secondly what is a start-up message? You can append command line arhs that are passed to a subprocess, it's not related to sendprocessmessage