This is an interesting question. Asynchronous programming is a paradigm of programming that is principally single threaded, i.e. “following one thread of continuous execution”. You refer to javascript, so lets discuss that language, in the environment of a web browser. A web browser runs a single thread of javascript execution in each window, it handles … Read more
If you are using Spring’s Java-configuration, your config class needs to implements AsyncConfigurer: @Configuration @EnableAsync public class AppConfig implements AsyncConfigurer { […] @Override public Executor getAsyncExecutor() { ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); executor.setCorePoolSize(2); executor.setMaxPoolSize(5); executor.setQueueCapacity(50); executor.setThreadNamePrefix(“MyExecutor-“); executor.initialize(); return executor; } } See @EnableAsync documentation for more details : http://docs.spring.io/spring/docs/3.1.x/javadoc-api/org/springframework/scheduling/annotation/EnableAsync.html
OK, I think I’ve solved my problem and I must thank this blog post from Fred McCann’s : Using Core Data on Multiple Threads The problem seems to come from the fact that I instantiate my background moc on the main thread instead of the background thread. When Apple tells that each thread needs to … Read more
Keeping a Connection open forever is a very bad idea. It doesn’t have an endless lifetime, your application may crash whenever the DB times out the connection and closes it. Best practice is to acquire and close Connection, Statement and ResultSet in the shortest possible scope to avoid resource leaks and potential application crashes caused … Read more
As you never close the ch channel, the range loop will never finish. You can’t send back the result on the same channel. A solution is to use a different one. Your program could be adapted like this : package main import ( “fmt” ) func total(in chan int, out chan int) { res := … Read more
Yup, you declare a new type which inherits from TThread: TMyWorkerThread = class(TThread) end; Then you add a function override for Execute(): TMyWorkerThread = class(TThread) public procedure Execute; override; end; That procedure will be called when you start your thread. It will be executed in parallel with your main program. Let’s write it. procedure TMyWorkerThread.Execute; … Read more
Threading/concurrency problems are notoriously difficult to replicate – which is one of the reasons why you should design to avoid or at least minimize the probabilities. This is the reason immutable objects are so valuable. Try to isolate mutable objects to a single thread, and then carefully control the exchange of mutable objects between threads. … Read more
Without the thread-support, you’re out of luck for using curses functions in more than one thread. That’s because most of the curses calls use static or global data. The getch function for instance calls refresh which can update the whole screen—using the global pointers curscr and stdscr. The difference in the thread-support configuration is that … Read more
Big pre-answer caveat: this answer recommends using C++ because the question specifically asks for a solution that runs without the GIL. If you don’t have this requirement (and you probably don’t…) then Numpy is the simplest and easiest solution. Provided that you’re generating large amounts of numbers at a time you will find Numpy perfectly … Read more
There is a Java FX event dispatch thread, which handle all GUI-related tasks. You must update all UI components in this thread. Long-running tasks, like Thread.sleep should never be executed in this thread, since windows will hang, and the GUI will be frozen. Execute all your code in the application main thread, and perform only … Read more