In Chapter 1, Getting Started with Network Programming, we illustrated a simple multithreaded echo server. This approach is reintroduced here to provide a foundation for the use of threads in the remainder of the chapter.
In this example, the server will accept requests for prices when given the name of a part. The implementation will use the
ConcurrentHashMap class that supports concurrent access to the part name and price. In a multithreaded environment, concurrent data structures, such as the
ConcurrentHashMap class, handle operations without the potential for data corruption. Also, this map is an example of caching, which can be useful in improving the performance of applications. ...