Task 1 : Java REST API
Step 1: Set Up Your Project
1)Create a new Spring Boot project using Spring Initializer (https://start.spring.io/). Add the following dependencies: . Spring Web . Spring Data MongoDB
2)Generate the project and open it in your IDE.
Step 2: Create the Server Entity Create a 'Server' class to represent the server objects
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
@Document
public class Server { @Id
private int id;
private String name;
private String language;
private String framework;
}
Step 3: Create the Repository
Create a repository interface for the Server entity to interact with MongoDB
import org.springframework.data.mongodb.repository.MongoRepository;
public interface ServerRepository extends MongoRepository<Server, String> {
Server findByNameContaining(String name);
}
Step 4: Create the REST Controller
Create a REST controller to define your API endpoints
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.List;
import java.util.Optional;
@RestController
@RequestMapping("/api/servers")
public class ServerController {
@Autowired
private ServerRepository serverRepository;
@GetMapping
public ResponseEntity<List<Server>> getServers(@RequestParam(required = false) String name) {
if (name != null) {
Server server = serverRepository.findByNameContaining(name);
if (server != null) {
return ResponseEntity.ok(List.of(server));
} else {
return ResponseEntity.notFound().build();
}
} else {
List<Server> servers = serverRepository.findAll();
return ResponseEntity.ok(servers);
}
}
@PutMapping
public ResponseEntity<Server> createServer(@RequestBody Server server) {
Server savedServer = serverRepository.save(server);
return ResponseEntity.status(HttpStatus.CREATED).body(savedServer);
}
@DeleteMapping("/{id}")
public ResponseEntity<Void> deleteServer(@PathVariable String id) {
Optional<Server> server = serverRepository.findById(id);
if (server.isPresent()) {
serverRepository.deleteById(id);
return ResponseEntity.noContent().build();
} else {
return ResponseEntity.notFound().build();
}
@GetMapping("/findByName/{name}")
public ResponseEntity<List<Server>> findServersByName(@PathVariable("name") String name) {
List<Server> server = serverRepository.findByNameContaining(name);
return server.size() != 0?
new ResponseEntity<>(server, HttpStatus.OK) :
new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
}
}
Step 5: Configure MongoDB
Configure your MongoDB connection properties in your application.properties file.
Step 6: Build and Run the Application
Build and run your Spring Boot application.
Step 7: Test the API
You can test the API endpoints using tools like Postman or curl here i have used postman to create and test the API end points
SCREENSHOTS OF INPUT AND OUTPUT :
GET servers : Should return all the servers if no parameters are passed. When server id is passed as a parameter - return a single server or 404 if there’s no such a server.
PUT a server : The server object is passed as a json-encoded message body.
DELETE a server : The parameter is a server ID. Here i Have deleted by id = 2
GET (find) servers by name : The parameter is a string. Must check if a server name contains this string and return one or more servers found. Return 404 if nothing is found.
