Countdown Latch

Countdown Latch Problem Statement Create a thread-safe counter that lets any number of threads pause until its value becomes zero. Implement a CountdownLatch class with these operations: Real-World Use Cases Parallel Task Completion: Hold a merge step until all parallel downloads have finished. Service Initialization: Delay incoming traffic until every microservice reports readiness. Batch Processing: Wait for each item in a batch to be handled before continuing. Example…