Angular provides a built-in support for sending requests secured with the XSRF-TOKEN header. However, it won’t add the token to absolute URLs for security reasons. One way to solve the “Invalid CSRF token found” issue is to use relative links in all mutable requests and apply a custom proxy.
Each API requires comprehensive documentaiton. You can generate it using Swagger for a REST API. Its clients will get standardized and thorough insight while you won’t need to worry about keeping it up to date. Learn how to configure Swagger, generate documentation in JSON and render it with Swagger UI when frontend is supported by Angular.
When debugging a hibernate related issue, it is useful to examine queries in the console. Check out how to print them with binding parameters.