Change the Better World

There are 4 methods 1. URI @GetMapping(path = "/v1/users/{id}") //uri 2. Request Parameter @GetMapping(path = "/users/{id}", params = "version=1") //request param 3. mime type @GetMapping(path="/users/{id}", headers="X-API-VER=1") // header 4. header @GetMapping(value = "/users/{id}", produces = "application/vnd.company.appv1+json") //mime type

When a exceptionhandler is inherited from ResponseEntityExceptionHadler, we expect that @ExceptionHadler(Exception.class) is used to catch All exceptions. But if MethodArgumentNotValidException is faced, our expectation misses our tip because the Exception wouldn't handle it. This MethodArgumentNotValidException is used and handled with at ResponseEntityExceptionHadler so when an exception happe..

1. Change spring boot server port in application.properties or application.yml file - application.properties server.port=8081 - application.yml server port=8081 2. Change it at command line argument - example java -Dserver.port=8081 -jar ****.jar 3. at intellij - example Run/Debu Configurations -> VM options : in VM option, type "-Dserver.port=8081" 4. using gradle bootRun - example "gradle boot..

1. Go to the root of the application where "build.gradle" is available. 2. Run execute the below command "gradle bootRun"

Stream is an iterator that allows you to refer to the storage elements of a collection one by one and process them in a lambda expression, which has been added since Java 8. It acts similar to an Iterator, but the difference is that the code can be made more concise by providing the element handling code in a lambda expression, and that parallelism is easy because it uses an internal iterator. I..

Preferences -> Plugins -> Marketplace -> search "Spring boot assistant" -> install it.

Level 0: The Swamp of POX(Plain Old XML) : least conforming to REST architecture style. http://server/getPosts http://server/deletePosts Level 1: Resources : multiple URIs, unlike in Level 0. http://server/accounts http://server/accounts/10 Level 2: HTTP Verbs : HTTP commands are used about GET, POST, PUT, DELETE, and so on. Level1 + HTTP Methods(GET, POST, PUT and so on) evel 3: Hypermedia Cont..

Monolithic has everything. All service are combined in one build, written in tha same language and application framework Microservice has a service and each other are connected.

is a program which is designed for a cloud computing architecture. Microservices This architecture efficiently allocates rssources to each service CI/CD - CI: Integrated Server, Build and Test tool - CD: Continuous Delivery/DeploymentDevOps Containers more informatin about cloud native application(https://www.techtarget.com/searchcloudcomputing/definition/cloud-native-application)