Implement update customer api.

src/main/java/com/broodcamp/web/application/CustomerController.java

@@ -16,6 +16,7 @@
 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.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -63,6 +64,24 @@ public ResponseEntity<Resource<Customer>> newCustomer(@RequestBody Customer newC
  return ResponseEntity.created(new URI(resource.getId().expand().getHref())).body(resource);
  }
 
+ @PutMapping("/{id}")
+ public ResponseEntity<?> replaceCustomer(@RequestBody Customer newCustomer, @PathVariable Long id) throws URISyntaxException {
+
+ Customer updatedEmployee = repository.findById(id).map(employee -> {
+ employee.setName(newCustomer.getName());
+ employee.setAge(newCustomer.getAge());
+ employee.setEmail(newCustomer.getEmail());
+ return repository.save(employee);
+ }).orElseGet(() -> {
+ newCustomer.setId(id);
+ return repository.save(newCustomer);
+ });
+
+ Resource<Customer> resource = assembler.toResource(updatedEmployee);
+
+ return ResponseEntity.created(new URI(resource.getId().expand().getHref())).body(resource);
+ }
+
  /**
  * Deleted the customer from the system.client will pass the ID for the customer
  * and this end point will remove customer from the system if found.