title: How Rest Controller handle multiple request at same time for a single instance application?
body: <ol>
  <li>If multiple request are hit to a single RestController at the same time in a application, how it is handle for different scenarios (Multiple request to a single endpoints (only GET), or Multiple requests for multiple endpoints(GET, POST, PUT...))</li>
  <li>Is multi-threading concept utilized? If yes is it possible to handle the requests in FIFO pattern? </li>
  <li>What is the maximum request a RestController can take ? </li>
  <li>Does RestController scope affect handling of requests (behavior of request scope with default scope-singleton) ? </li>
  <li>Also how it is handle by Application context (example with flow will be helpful)</li>
  </ol>
  
  <p>Considering building <strong>Micro-services</strong> with <strong>Spring Boot 2</strong>.</p>