Responder | MDNS poisoner , with built-in HTTP/SMB/MSSQL/FTP/LDAP rogue | TLS library

You'll probably need to use async hooks for this, something like

When adding the data to your App, you have to specify that you want it to be downcasted as a trait object. Data does not accept unsized types directly, so you have to first create an Arc (which does accept unsized types) and then convert it to a Data. We will use the app_data method to avoid wrapping the searcher in a double arc.

Can I try to read if it no data available?

Yep, and it's going to be case more often than not. Read() will do nothing until data is available, and only then put its passed tag into the completion queue. (see below for details)

Is it blocking call?

Nope. Read() and Write() return immediately. However, you can only have one of each in flight at any given moment. If you try to send a second one before the previous has completed, it (the second one) will fail.

What is the proper way to async reading?

Each time a Read() is done, start a new one. For that, you need to be able to tell when a Read() is done. This is where tags come in!

When you call Read(&msg, tag), or Write(request, tag),you are telling grpc to put tag in the completion queue associated with that responder once that operation has completed. grpc doesn't care what the tag is, it just hands it off.

So the general strategy you will want to go for is:

• As soon as you are ready to start receiving messages:
  • call responder->Read() once with some tag that you will recognize as a "read done".
• Whenever cq_.Next() gives you back that tag, and ok == true:
  • consume the message
  • Queue up a new responder->Read() with that same tag.

Obviously, you'll also want to do something similar for your calls to Write().

But since you still want to be able to lookup the handler instance from a given tag, you'll need a way to pack a reference to the handler as well as information about which operation is being finished in a single tag.

Lookup the handler instance from a given tag? Why?

The true raison d'être of completion queues is unfortunately not evident from the examples. They allow multiple asynchronous rpcs to share the same thread. Unless your application only ever makes a single rpc call, the handling thread should not be associated with a specific responder. Instead, that thread should be a general-purpose worker that dispatches events to the correct handler based on the content of the tag.

The official examples tend to do that by using pointer to the handler object as the tag. That works when there's a specific sequence of events to expect since you can easily predict what a handler is reacting to. You often can't do that with async bidirectional streams, since any given completion event could be a Read() or a Write() finishing.

Here's a general outline of what I personally consider to be a clean way to go about all that:

Wrap the whole body of Scaffold with GestureDetector and make your operations on the on tap method. and add behavior: HitTestBehavior.opaque, to the gesture detector.

Code:-

The issue is that you're mixing multithreading and async in a way which causes all the work to be sequential: all your threads do is call get_single_tweet which is apparently an async function.

Now in a language like Javascript, get_single_tweet would create a task, which would return a promise symbolising the realisation of the task and run as soon as possible.

That's not how Rust works (or lots of other languages, incidentially, Python behaves much more like Rust than it does Javascript). In Rust, get_single_tweet just creates a future, it doesn't actually do anything, the future has to be polled for things to happen: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=b26b47e62e46b66b60844aabc2ea7be1

When does this polling happens? When the dynamic chain of await-ing reaches the top of the event loop.

Here the future is created in the thread, then returned from the thread, then await-ed when fetched from the join, so your fetches are not being run in threads, they're being run here:

You need to clone it before it's moved. Otherwise your first iteration will necessarily need to take it (since there is no guarantee config will still exist to be cloned when the task runs). Then you get the error you see for the second iteration, since it too necessarily needs to move config; that's what it means by "value moved into closure here, in previous iteration of loop".

This is a serialization issue. As per the github repo that you shared there doesn't seem to be a endpoint associated with /gameusers path. But its being called in the health check callback. So the call is failing and its not able to deserialize error response into ArrayList. In GameUserRESTController.java you need to add the path as follows:

Your freezing problem may not be C# or code related

on the top left of your console window, on the icon .. right click select Properties remove the option of Quick Edit Mode and Insert Mode

you can google that feature, but essentially manifests in the problem you describe above

The formatting problem on the other hand does seem to be, here you need to create a class that serializes writes to the console window from a singe thread. a consumer/producer pattern would work (you could use a BlockingCollection to implement this quite easily)