adding methods for controller. closes #15

src/main/java/guru/springframework/msscbeerservice/services/BeerService.java

@@ -0,0 +1,16 @@
+package guru.springframework.msscbeerservice.services;
+
+import guru.springframework.msscbeerservice.web.model.BeerDto;
+
+import java.util.UUID;
+
+/**
+ * Created by jt on 2019-06-06.
+ */
+public interface BeerService {
+    BeerDto getById(UUID beerId);
+
+    BeerDto saveNewBeer(BeerDto beerDto);
+
+    BeerDto updateBeer(UUID beerId, BeerDto beerDto);
+}

src/main/java/guru/springframework/msscbeerservice/services/BeerServiceImpl.java

@@ -0,0 +1,45 @@
+package guru.springframework.msscbeerservice.services;
+
+import guru.springframework.msscbeerservice.domain.Beer;
+import guru.springframework.msscbeerservice.repositories.BeerRepository;
+import guru.springframework.msscbeerservice.web.controller.NotFoundException;
+import guru.springframework.msscbeerservice.web.mappers.BeerMapper;
+import guru.springframework.msscbeerservice.web.model.BeerDto;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.UUID;
+
+/**
+ * Created by jt on 2019-06-06.
+ */
+@RequiredArgsConstructor
+@Service
+public class BeerServiceImpl implements BeerService {
+    private final BeerRepository beerRepository;
+    private final BeerMapper beerMapper;
+
+    @Override
+    public BeerDto getById(UUID beerId) {
+        return beerMapper.beerToBeerDto(
+                beerRepository.findById(beerId).orElseThrow(NotFoundException::new)
+        );
+    }
+
+    @Override
+    public BeerDto saveNewBeer(BeerDto beerDto) {
+        return beerMapper.beerToBeerDto(beerRepository.save(beerMapper.beerDtoToBeer(beerDto)));
+    }
+
+    @Override
+    public BeerDto updateBeer(UUID beerId, BeerDto beerDto) {
+        Beer beer = beerRepository.findById(beerId).orElseThrow(NotFoundException::new);
+
+        beer.setBeerName(beerDto.getBeerName());
+        beer.setBeerStyle(beerDto.getBeerStyle().name());
+        beer.setPrice(beerDto.getPrice());
+        beer.setUpc(beerDto.getUpc());
+
+        return beerMapper.beerToBeerDto(beerRepository.save(beer));
+    }
+}

src/main/java/guru/springframework/msscbeerservice/web/controller/BeerController.java

@@ -1,6 +1,8 @@
 package guru.springframework.msscbeerservice.web.controller;
 
+import guru.springframework.msscbeerservice.services.BeerService;
 import guru.springframework.msscbeerservice.web.model.BeerDto;
+import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.validation.annotation.Validated;
@@ -11,30 +13,26 @@
 /**
  * Created by jt on 2019-05-12.
  */
+@RequiredArgsConstructor
 @RequestMapping("/api/v1/beer")
 @RestController
 public class BeerController {
 
+    private final BeerService beerService;
 
     @GetMapping("/{beerId}")
     public ResponseEntity<BeerDto> getBeerById(@PathVariable("beerId") UUID beerId){
-
-        //todo impl
-        return new ResponseEntity<>(BeerDto.builder().build(), HttpStatus.OK);
+        return new ResponseEntity<>(beerService.getById(beerId), HttpStatus.OK);
     }
 
     @PostMapping
     public ResponseEntity saveNewBeer(@RequestBody @Validated BeerDto beerDto){
-
-        //todo impl
-        return new ResponseEntity(HttpStatus.CREATED);
+        return new ResponseEntity<>(beerService.saveNewBeer(beerDto), HttpStatus.CREATED);
     }
 
     @PutMapping("/{beerId}")
     public ResponseEntity updateBeerById(@PathVariable("beerId") UUID beerId, @RequestBody @Validated BeerDto beerDto){
-
-        //todo impl
-        return new ResponseEntity(HttpStatus.NO_CONTENT);
+        return new ResponseEntity<>(beerService.updateBeer(beerId, beerDto), HttpStatus.NO_CONTENT);
     }
 
 }

src/main/java/guru/springframework/msscbeerservice/web/controller/NotFoundException.java

@@ -0,0 +1,7 @@
+package guru.springframework.msscbeerservice.web.controller;
+
+/**
+ * Created by jt on 2019-06-06.
+ */
+public class NotFoundException extends RuntimeException {
+}

src/main/java/guru/springframework/msscbeerservice/web/mappers/BeerMapper.java

@@ -10,7 +10,7 @@
 @Mapper(uses = {DateMapper.class})
 public interface BeerMapper {
 
-    BeerDto BeerToBeerDto(Beer beer);
+    BeerDto beerToBeerDto(Beer beer);
 
-    Beer BeerDtoToBeer(BeerDto dto);
+    Beer beerDtoToBeer(BeerDto dto);
 }