WebSockets
Another kind of optimization we can think about is sending the data to the client as it becomes available to the server. Since we fetch results of the search in multiple threads, the data will come in multiple chunks. We could send them bit by bit instead of waiting for all the results.
Spring has excellent support for WebSockets, which is a protocol that allows clients to maintain a long-running connection to the server. Data can be pushed in web sockets on both ends of the connection and consumers will get the data in real-time.
We will use a JavaScript library called SockJS to ensure compatibility with all browsers. Sockjs will transparently fall back on another strategy if our users have an outdated browser.
We will also use StompJS ...
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