Custom Annotation for Validating a Bean in Java
This example validates that bean fields are not null using a custom class-level annotation.
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Jekyll Environment Variables and Multiple Config Files
When developing locally, you often need different settings than production (URL, analytics, Disqus, etc.).
Execute N Threads One After Another in Cyclic Order
Interview-style concurrency problem: ensure threads print in strict round-robin sequence.
ExecutorService invokeAll Example in Java
invokeAll submits a collection of Callable tasks and waits until all complete.
DelayQueue in Java with Example
DelayQueue is a specialized blocking queue where elements become available only after a delay expires.