I try to create rest controller which return all products. I want to use CompletableFuture to return list with product.
I have async request to spring data
#Async
#Query("select product from Product product")
CompletableFuture<List<Product>> findAllAsync();
and controller
#Async
#RequestMapping(path = "/products", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public #ResponseBody
CompletableFuture<List<ProductData>> loadAllProducts2(){
return this.products.findAllAsync()
.thenApplyAsync(Collection::stream)
.thenApplyAsync(s -> s.map(Product::data))
.thenApplyAsync(s -> s.collect(Collectors.toList()));
}
ProgramData is simple DTO:
public final class ProductData {
private final String name;
private final String label;
public ProductData(String name, String label) {
this.name = name;
this.label = label;
}
public String getName() {
return this.name;
}
public String getLabel() {
return this.label;
}
}
Spring return nothing, in log output is :
o.s.b.a.e.mvc.EndpointHandlerMapping : Did not find handler method for [/products]
Any ideas what's wrong ?
I removed target directory and It did work.
Related
I have a spring-boot application and I use DTO like that:
Service
#Service
public class UnitOfMeasureServiceImpl implements IUnitOfMeasureService {
private final IUnitsOfMeasureRepository unitOfMeasureRepository;
#Autowired
public UnitOfMeasureServiceImpl(IUnitsOfMeasureRepository unitOfMeasureRepository) {
this.unitOfMeasureRepository = unitOfMeasureRepository;
}
#Override
public UnitOfMeasureDTO getUnitOfMeasureById(UUID id) {
Optional<UnitOfMeasure> optionalUnitOfMeasure = unitOfMeasureRepository.findById(id);
if (!optionalUnitOfMeasure.isPresent()){
// throw new ComponentNotFoundException(id);
return null;
}
return UnitOfMeasureDTO.factory(optionalUnitOfMeasure.get());
}
dto:
#Data
#JsonInclude(JsonInclude.Include.NON_NULL)
public class UnitOfMeasureDTO {
private String id;
private String name;
private String description;
private String sourceInfoCompanyName;
private String originalId;
public static UnitOfMeasureDTO factory(UnitOfMeasure unitOfMeasure) {
UnitOfMeasureDTO dto = new UnitOfMeasureDTO();
dto.id = unitOfMeasure.getId().toString();
dto.name = unitOfMeasure.getName();
dto.description = unitOfMeasure.getDescription();
dto.sourceInfoCompanyName = unitOfMeasure.getSourceInfo().getSourceCompany().getName();
dto.originalId = unitOfMeasure.getOriginalId();
return dto;
}
}
controller:
#RestController
#RequestMapping(UnitOfMeasureController.BASE_URL)
public class UnitOfMeasureController {
public static final String BASE_URL = "/api/sust/v1/unitOfMeasures";
private final IUnitOfMeasureService unitOfMeasureService;
public UnitOfMeasureController(IUnitOfMeasureService unitOfMeasureService) {
this.unitOfMeasureService = unitOfMeasureService;
}
#GetMapping(path = "/{id}")
#ResponseStatus(HttpStatus.OK)
public UnitOfMeasureDTO getUnitOfMeasureDTO(#PathVariable("id") UUID id) {
UnitOfMeasureDTO unitOfMeasureDTO = unitOfMeasureService.getUnitOfMeasureById(id);
return unitOfMeasureDTO;
}
So in my service I have getUnitOfMeasureById(UUID id) that return a UnitOfMeasureDTO.
Now I need to call, from another service, getUnitOfMeasureById(UUID id) that return the domain entity UnitOfMeasure. I think it's correct to call a service method from another service (not a controller method!) and the separation between business logic is at the service layer. So is it correct to have 2 methods: getUnitOfMeasureDTOById and getUnitOfMeasureById in the service? (getUnitOfMeasureDTOById call getUnitOfMeasureById to avoid code duplication)
#Component
public class JsonData {
#JsonProperty("id")
private Integer id;
#JsonProperty("createdAt")
private Date cratedAt;
#JsonProperty("name")
private String name;
#JsonProperty("email")
private String email;
#JsonProperty("imageUrl")
private String url;
public JsonData() {
}
public JsonData(Integer id, Date cratedAt, String name, String email, String url) {
this.id = id;
this.cratedAt = cratedAt;
this.name = name;
this.email = email;
this.url = url;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Date getCratedAt() {
return cratedAt;
}
public void setCratedAt(Date cratedAt) {
this.cratedAt = cratedAt;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
Controller
#RestController
public class JsonDataController {
#RequestMapping(value = "/template/products")
public void getAllData() {
RestTemplate template = new RestTemplate();
String url = "https://5ef99e4bbc5f8f0016c66d42.mockapi.io/testing/data";
ResponseEntity < JsonData[] > response = template.exchange(url, JsonData[].class);
for (JsonData jsonData: response.getBody()) {
System.out.println(jsonData.getName());
System.out.println(jsonData.getEmail());
}
}
}
I am trying to print json data that is array using rest template but I am getting error in this line "ResponseEntity < JsonData[] > response = template.exchange(url, JsonData[].class);" my error is "cannot resolve method" Can anyone tell me correct way of doing this .I am new to spring I do not have proper understanding it would be helpful if some one can give their suggeestion in this code
RestTemplate does not have any method with signature exchange(String, Class<T>).
That is why you are getting "cannot resolve method" error for template.exchange(url, JsonData[].class);.
Here is an example of correct usage of one of the methods from RestTemplate.exchange API:
RestTemplate restTemplate = new RestTemplate();
ResponseEntity<JsonData[]> response = restTemplate.exchange(url, HttpMethod.GET, null, JsonData[].class);
RestTemplate also has another method - getForEntity that makes a GET call with the given URL and expected return type. (without need for passing null for not required fields)
RestTemplate template = new RestTemplate();
String url = "https://5ef99e4bbc5f8f0016c66d42.mockapi.io/testing/data";
ResponseEntity <JsonData[]> response = template.getForEntity(url, JsonData[].class);
I am getting unsupported mediatype error.
My User Profile class looks like this
Class UserProfile{
private int age;
private String name,
private String currenecy;
}
And this is the method in controller
#RequestMapping(value = "/Create", method=RequestMethod.POST,consumes=MediaType.APPLICATION_JSON_VALUE, produces=MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<UserProfileResponse> createUserProfile(#RequestBody UserProfile userProfile)
{
UserProfileResponse userProfileResponse = new UserProfileResponse();
int id = createUserProfileData(userProfile)
userProfileResponse.setId(id);
return new ResponseEntity<UserProfileResponse>(userProfileResponse,HTTPStatus.OK);
}
I am trying to send the request through POSTMAN but getting
Error 415--Unsupported Media Type
My Request in POstman looks like this
Content-Type:application/json
Accept:application/json
Method is : POST
{
"age":28,
"name":"Sam",
"currency": "INR"
}
Suggest me what I am missing?
Don't forget to select "JSON" format, filled in arbitrary JSON string in the textarea.
Also use either Accept or Content-type at a time.
If that doesn't work then can you check like below by removing consumes and adding headers manually.
#RequestMapping(value = "/Create", method=RequestMethod.POST, headers = "Accept=application/json",produces=MediaType.APPLICATION_JSON_VALUE)
I could see the response coming back with your code. I am deliberately returning the same object just to test the connectivity. Following is my code:
#RequestMapping(value = "/create", method= RequestMethod.POST,consumes= MediaType.APPLICATION_JSON_VALUE, produces=MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<UserProfile> createUserProfile(#RequestBody UserProfile userProfile)
{
System.out.println("Got request");
return new ResponseEntity<>(userProfile, HttpStatus.OK);
}
Used getter and setter in UserProfile
public class UserProfile {
private int age;
private String name;
private String currenecy;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCurrenecy() {
return currenecy;
}
public void setCurrenecy(String currenecy) {
this.currenecy = currenecy;
}
}
Finally after after spending some time.. I figured out why it was not working.
In my java based spring configuration file I missed "#EnableWebMvc".
After adding it, my problem got resolved.
#Configuration
**#EnableWebMvc** // This annotation was missing.
#ComponentScan(basePackages="com.hemant.*")
public class TestConfiguration {}
How can i validate my path variable in spring. I want to validate id field, since its only single field i do not want to move to a Pojo
#RestController
public class MyController {
#RequestMapping(value = "/{id}", method = RequestMethod.PUT)
public ResponseEntity method_name(#PathVariable String id) {
/// Some code
}
}
I tried doing adding validation to the path variable but its still not working
#RestController
#Validated
public class MyController {
#RequestMapping(value = "/{id}", method = RequestMethod.PUT)
public ResponseEntity method_name(
#Valid
#Nonnull
#Size(max = 2, min = 1, message = "name should have between 1 and 10 characters")
#PathVariable String id) {
/// Some code
}
}
You need to create a bean in your Spring configuration:
#Bean
public MethodValidationPostProcessor methodValidationPostProcessor() {
return new MethodValidationPostProcessor();
}
You should leave the #Validated annotation on your controller.
And you need an Exceptionhandler in your MyController class to handle theConstraintViolationException :
#ExceptionHandler(value = { ConstraintViolationException.class })
#ResponseStatus(value = HttpStatus.BAD_REQUEST)
public String handleResourceNotFoundException(ConstraintViolationException e) {
Set<ConstraintViolation<?>> violations = e.getConstraintViolations();
StringBuilder strBuilder = new StringBuilder();
for (ConstraintViolation<?> violation : violations ) {
strBuilder.append(violation.getMessage() + "\n");
}
return strBuilder.toString();
}
After those changes you should see your message when the validation hits.
P.S.: I just tried it with your #Size validation.
To archive this goal I have apply this workaround for getting a response message equals to a real Validator:
#GetMapping("/check/email/{email:" + Constants.LOGIN_REGEX + "}")
#Timed
public ResponseEntity isValidEmail(#Email #PathVariable(value = "email") String email) {
return userService.getUserByEmail(email).map(user -> {
Problem problem = Problem.builder()
.withType(ErrorConstants.CONSTRAINT_VIOLATION_TYPE)
.withTitle("Method argument not valid")
.withStatus(Status.BAD_REQUEST)
.with("message", ErrorConstants.ERR_VALIDATION)
.with("fieldErrors", Arrays.asList(new FieldErrorVM("", "isValidEmail.email", "not unique")))
.build();
return new ResponseEntity(problem, HttpStatus.BAD_REQUEST);
}).orElse(
new ResponseEntity(new UtilsValidatorResponse(EMAIL_VALIDA), HttpStatus.OK)
);
}
I know how to return on XML element from my controller.
What if I need to return a List of a specific class? What I can think of is a wrapper object holding a List. Is there another way to do this?
#RequestMapping(value = "/test", method = RequestMethod.GET, produces = "application/xml")
public #ResponseBody
Test getTest() {
return new Test();
}
#XmlRootElement
public class Test {
private String name = "kalle";
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
I haven't tried this but you can create custom message converter that converts list into xml vice versa and then inject it to the message converters of the application context.