This behaviour is typically documented in methods that throw that exception. For example, the javadoc for Object.wait() says: “InterruptedException – if any thread interrupted the current thread before or while the current thread was waiting for a notification. The interrupted status of the current thread is cleared when this exception is thrown.“ Indeed, the javadoc … Read more
Add a @Bean method to your Spring Boot application class: @SpringBootApplication @EnableAsync public class MySpringBootApp { @Bean public TaskExecutor taskExecutor() { ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); executor.setCorePoolSize(5); executor.setMaxPoolSize(10); executor.setQueueCapacity(25); return executor; } public static void main(String[] args) { // … } } See Java-based container configuration in the Spring Framework reference documentation on how to … Read more
At the moment, Scala already supports two major strategies for concurrency – thread-based concurrency (derived from Java) and type-safe Actor-based concurrency (inspired by Erlang). In the nearest future (Scala 2.9), there will be two big additions to that: Software Transactional Memory (the basis for concurrency in Clojure, and probably the second most popular concurrency-style in … Read more
Jack and Jill happens to want to make a sandwich at the same time. Both need a slice of bread, so they both goes to get the loaf of bread and a knife. Jack gets the knife first, while Jill gets the loaf of bread first. Now Jack tries to find the loaf of bread … Read more
In your modified code: public int hashCode() { if (hash == 0) { // (1) int off = offset; char val[] = value; int len = count; int h = 0; for (int i = 0; i < len; i++) { h = 31*h + val[off++]; } hash = h; } return hash; // (2) … Read more
One way is to use a hierarchy of critical sections. If you ensure that a parent critical section is never entered within one of its children, deadlocks cannot happen. The difficulty is to enforce this hierarchy.
Chances are that you don’t have to do anything if you are using the asynchronous methods already. Depending on the technology that you are using for the call to the web service, ultimately, it’s going to drop down to the Win32 API to make the call to get bytes from the network, and to that … Read more
As of C11 there is an optional Atomic library which provides atomic operations. This is portable to whatever platform that has a C11 compiler (like gcc-4.9) with this optional feature. The presence of the atomic can be checked with __STDC_NO_ATOMICS__and the presence of <stdatomic.h> atomic.c #include <stdio.h> #include <stdlib.h> #ifndef __STDC_NO_ATOMICS__ #include <stdatomic.h> #endif int … Read more
You could use a dictionary that is typed like this: ConcurrentDictionary<TKey, Lazy<TValue>>, and then the your value factory would return a Lazy<TValue> object that has been initialized with LazyThreadSafetyMode.ExecutionAndPublication, which is the default option used by Lazy<TValue> if you don’t specify it. By specifying the LazyThreadSafetyMode.ExecutionAndPublication you are telling Lazy only one thread may initialize … Read more