[Spring Hateoas 1.2] HTTP Method에 헤이토스 적용

- POST

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@PostMapping("/employees")   ResponseEntity<?> newEmployee(@RequestBody Employee newEmployee) {       EntityModel<Employee> entityModel = EntityModel.of(repository.save(newEmployee),         linkTo(methodOn(EmployeeController.class).one(newEmployee.getId())).withSelfRel(),         linkTo(methodOn(EmployeeController.class).all()).withRel("employees"));       return ResponseEntity         .created(entityModel.getRequiredLink(IanaLinkRelations.SELF).toUri())         .body(entityModel);   }

 

- GET

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@GetMapping("/employees") public CollectionModel<EntityModel<Employee>> all() {     List<EntityModel<Employee>> employees = repository.findAll().stream()       .map(employee -> EntityModel.of(employee,           linkTo(methodOn(EmployeeController.class).one(employee.getId())).withSelfRel(),           linkTo(methodOn(EmployeeController.class).all()).withRel("employees")))       .collect(Collectors.toList());     return CollectionModel.of(employees, linkTo(methodOn(EmployeeController.class).all()).withSelfRel()); }

 

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@GetMapping("/employees/{id}") public EntityModel<Employee> one(@PathVariable Long id) {   Employee employee = repository.findById(id)       .orElseThrow(() -> new EmployeeNotFoundException(id));     return EntityModel.of(employee,       linkTo(methodOn(EmployeeController.class).one(employee.getId())).withSelfRel(),       linkTo(methodOn(EmployeeController.class).all()).withRel("employees")); }

 

 

- PUT

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@PutMapping("/employees/{id}") ResponseEntity<?> replaceEmployee(@RequestBody Employee newEmployee, @PathVariable Long id) {     Employee updatedEmployee = repository.findById(id)       .map(employee -> repository.save(newEmployee))        .orElseGet(() -> {         newEmployee.setId(id);         return repository.save(newEmployee);       });     EntityModel<Employee> entityModel = EntityModel.of(updatedEmployee,       linkTo(methodOn(EmployeeController.class).one(updatedEmployee.getId())).withSelfRel(),       linkTo(methodOn(EmployeeController.class).all()).withRel("employees"));     return ResponseEntity       .created(entityModel.getRequiredLink(IanaLinkRelations.SELF).toUri())       .body(entityModel); }

 

 

- DELETE

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@DeleteMapping("/employees/{id}") ResponseEntity<?> deleteEmployee(@PathVariable Long id) {   repository.deleteById(id);     return ResponseEntity.noContent().build(); }

 

 

아래 기능은 표현모델 어셈블러(Representation model assembler)

를 생성하여 대체할 수 있습니다.

관련해서는 다음 포스팅에 자세히 올리겠습니다.

 

EntityModel.of(employee,

      linkTo(methodOn(EmployeeController.class).one(employee.getId())).withSelfRel(),

      linkTo(methodOn(EmployeeController.class).all()).withRel("employees"));