GitHub - salimasan/JsonFeedRestService: Project gathers JSON data, parses it, caches it and serves it as a REST web service. I used Jersey 2.33 , Apache-tomcat-9.0.41, java version 15.0.1, Jackson JSON parser 2.9.10. I used both Eclipse and Netbeans. JsonFeedReader class gathers the JSON data from URL, parses it and stores it in class variables. It is a timer task which executes periodically at a given interval. Please note that it is a singleton class. So it has only one instance. Also I used Singleton pattern's getInstance method to initialize Timer which must be done only once.getInstance method is synchronized so service calls from multiple Tomcat threads are not permitted to create a second instance. Gathering JSON and parsing it is a time consuming task. So I decided to cache results in JsonFeedReader class.This way I think service is much more scalable. Just assume we received 1000 requests per second, the service's performance would be terrible if we gather and parse JSON for every request. YouTubeService class just gathers the prepared results from JsonFeedReader class and returns it to the client in JSON format. This dramatically reduces the response time to client. Because YouTubeService just turns the cached results. I used Entry class as a DTO object. I think the project's structure will allow future additions of new services related to Youtube feed. It is easy to add new services. I also made a little stress test with Chrome Postman extension. It is ok. I got both GET and POST methods handled. Future improvements can be: 1- Using maven for dependency management 2- Getting url and interval as parameters from web.xml 3- Handling more than one video is the most popular video case. (If viewCount's are equal) 4- Automated HTTP requests for testing can be valuable. Jmeter can be used. 5- Send notification email and SMS in the case of a network failure.

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Project gathers JSON data, parses it, caches it and serves it as a REST web service. I used Jersey 2.33 , Apache-tomcat-9.0.41, java version 15.0.1, Jackson JSON parser 2.9.10. I used both Eclipse and Netbeans. JsonFeedReader class gathers the JSON data from URL, parses it and stores it in class variables. It is a timer task which executes perio…