Implementation for User Resource

src/main/java/com/techm/ms/resource/UserResourceImpl.java

@@ -1,8 +1,73 @@
 package com.techm.ms.resource;
 
-import org.springframework.stereotype.Controller;
+import java.util.List;
 
-@Controller
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+import com.techm.ms.model.User;
+import com.techm.ms.service.UserService;
+
+@RestController
 public class UserResourceImpl implements UserResource {
+	private static final Logger logger = LoggerFactory.getLogger(UserResourceImpl.class); 
+
+	private static final String alreadyExists = "Unable to create. A account with the name already exists.";
+	private static final String idDoesNotExist = "Account with id ";
+	private static final String notFound = " not found";
+	private static final String noUsersFound = "There are no users.";
+
+	@Autowired
+	private UserService userService;
+
+
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	@Override	
+	@PostMapping(path="/users")
+	public ResponseEntity<User> createUser(@RequestBody User user){
+		logger.debug("Inside createUser");
+		if(userService.findByName(user.getName()) != null){
+			 return new ResponseEntity(alreadyExists, HttpStatus.CONFLICT);
+		}
+		userService.save(user);
+		return new ResponseEntity<User>(HttpStatus.CREATED);
+	}
+
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	@GetMapping(path = "/users/{id}")
+	public ResponseEntity<User> getUser(@PathVariable long id){
+		User user = userService.findById(id);
+		if(user == null){
+			StringBuilder sb = new StringBuilder();
+			sb.append(idDoesNotExist).append(id).append(notFound);
+			return new ResponseEntity(sb, HttpStatus.NOT_FOUND);
+		}
+		return new ResponseEntity<User>(user, HttpStatus.FOUND);
+	}
+
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	@GetMapping(path = "/users")
+	public ResponseEntity<List<User>> getAllUsers(){
+		List<User> userList = userService.findAll();	
+		if(userList == null){			
+			return new ResponseEntity(noUsersFound, HttpStatus.NOT_FOUND);
+		}
+		return new ResponseEntity<List<User>>(userList, HttpStatus.FOUND);
+	}
+
+	@DeleteMapping(path = "/users/{id}")
+	public ResponseEntity<User> deleteUser(@PathVariable long id) {
+		User deletedUser = userService.deleteUser(id);	
+		return new ResponseEntity<User>(deletedUser, HttpStatus.OK);
+	}
+
 
 }