René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Integrity Constraint Violation","articleBody":"Hello Mr. Gupta,\r\n\r\nFirst let me thank you for the great samples and well explanation.\r\n\r\nI think that the controller `MovieClientBean` which is responsible for adding a new movie to the database associated with the Movie Plex 7 Web App does not work correctly. To identify the error let us consider the following scenario:\r\n\r\nStep 1: Running the project \r\nStep 2: Clicking Movies in the left navigation bar.\r\nStep 3: Clicking the New Movie button.\r\nStep 4: Entering the data for a new movie, e.g., Movie Id: 22, Movie Name: Skyfall, Movie Actors: Daniel Craig\r\nStep 5: Clicking the Add button\r\nStep 6: Reloading you browser\r\nThe Application server shows of trace of `java.sql.SQLIntegrityConstraintViolationException`, because when reloading the browser, the app tried to add the last added movie again to the database, this operation will be rejected by the DBMS, because the attribute Movie_Id must be unique.","author":{"url":"https://github.com/ayoubfalah","@type":"Person","name":"ayoubfalah"},"datePublished":"2016-12-13T09:55:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/24/javaee7-hol/issues/24"}