Tutorial by Examples: sync

Concept AsyncTask is a class that allows running operations in the background, with the results being published on the UI thread. The main purpose is to eliminate all the boilerplate code for starting/running a thread by eliminating the handlers and all the stuff that are needed for manipulating t...

In the following example if someone if someone presses the home button while the task is running, then the task is cancelled. In this particular cancelling it should interrupt if running. public class MainActivity extends AppCompatActivity { private static AtomicBoolean inWork; pri...

Try catch Errors must always be handled. If you are using synchronous programming you could use a try catch. But this does not work if you work asynchronous! Example: try { setTimeout(function() { throw new Error("I'm an uncaught error and will stop the server!"); }, 1...

For syncing all folders in both direction, insert this into your Vagrantfile config.vm.synced_folder "my-project1", "/home/vagrant/my-project1"

For syncing all folders in both direction, insert this into your Vagrantfile: config.vm.synced_folder "my-project1", "/home/vagrant/my-project1", type: "rsync", :rsync__exclude => ['my-project1/mini_project2/target,my-project1/mini_project2/target,my-project1/mini...

Using async/await in C# applications simplifies multi-threading. This is how you can use async/await in conjunction with a TcpClient. // Declare Variables string host = "stackoverflow.com"; int port = 9999; int timeout = 5000; // Create TCP client and connect // Then get the netstr...

The only place where you can safely use async void is in event handlers. Consider the following code: private async Task<bool> SomeFuncAsync() { ... await ... } public void button1_Click(object sender, EventArgs e) { var result = SomeFuncAsync().Result; SomeOtherFunc(); } ...

This example uses the asyncio SSE library: https://github.com/brutasse/asyncio-sse import asyncio import sse class Handler(sse.Handler): @asyncio.coroutine def handle_request(self): yield from asyncio.sleep(2) self.send('foo') yield from asyncio.sleep(2) ...

public async int call_async () { return 1; } call_async.begin ((obj, res) => { var ret = call_async.end (res); }); To call an asynchronous functions from a synchronous context, use the begin method and pass a callback to receive the result. The two arguments are: obj is a GLi...

Server Side example Create Listener for server Start of with creating an server that will handle clients that connect, and requests that will be send. So create an Listener Class that will handle this. class Listener { public Socket ListenerSocket; //This is the socket that will listen ...

If you have multiple asynchronous tasks that needs to occur one after the other, you will need to chain together their promise objects. Here is a simple example: function First() { console.log("Calling Function First"); return $.get("/ajax/GetFunction/First"); } fu...

/In async.series,all the functions are executed in series and the consolidated outputs of each function is passed to the final callback. e.g/ var async = require('async'); async.series([ function (callback) { console.log('First Execute..'); callback(null, 'userPersonalData'); }, function (cal...

As this documentation explains, Sometimes a resource file will need to contain a value that can only be supplied at build time. To accomplish this in Maven, put a reference to the property that will contain the value into your resource file using the syntax ${<property name>}. The property ...

The GLib.Task provide low-level API for performing asynchronous operations. var task = new GLib.Task (null, null, (obj, result) => { try { var ret = result.propagate_boolean (); } catch (Error err) { // handler err... } }); Later in a thread or a callback: t...

This code implements a version of std::async, but it behaves as if async were always called with the deferred launch policy. This function also does not have async's special future behavior; the returned future can be destroyed without ever acquiring its value. template<typename F> auto asyn...

In the following naive parallel merge sort example, std::async is used to launch multiple parallel merge_sort tasks. std::future is used to wait for the results and synchronize them: #include <iostream> using namespace std; void merge(int low,int mid,int high, vector<int>&num)...

std::async: performs an asynchronous operation. std::future: provides access to the result of an asynchronous operation. std::promise: packages the result of an asynchronous operation. std::packaged_task: bundles a function and the associated promise for its return type.

In order to chain asynchronous operations and avoid a callback hell, Vala supports the yield statement. Used with an asynchronous invocation, it will pause the current coroutine until the call is completed and extract the result. Used alone, yield pause the current coroutine until it's being woken...

Function using promises: function myAsyncFunction() { return aFunctionThatReturnsAPromise() // doSomething is a sync function .then(result => doSomething(result)) .catch(handleError); } So here is when Async/Await enter in action in order to get clean...

Pull (Sync) Like in the command line you need to pull the current state of the repository once in a while. In GitHub Desktop this process is called by the sync Button at the top right corner. Push When you made local changes and want to push them you make a commit by writing something into the su...