Custom Exception not thrown in controller-method when no data is found in database - spring-boot

Question

My controller always give Internal server error whenever my condition fail, and are suppose to throw custom exception ResourceNotFoundException.
When I call account/1-endpoint (no account with id 1 in database) I expect an ResourceNotFoundException, but instead I get Internal server Error.. I do not understand why ResourceNotFoundException is not thrown, I watched several youtube tutorials on the topic.
Please help by providing possible solutions.
My model classes are
package com.bank2.Model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import org.hibernate.annotations.Proxy;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#Entity
#javax.persistence.Table(name="Account")
#Proxy(lazy = false)
#JsonIgnoreProperties(ignoreUnknown = true)
public class Account {
#Id
int accountNumber;
#Column(name="balance")
Double balance;
#Column(name="accountType")
String accountType;
public Account() {
super();
}
#Override
public String toString() {
return "Account [accountNumber=" + accountNumber + ", balance=" + balance + ", accountType=" + accountType + "]";
}
public int getAccountNumber() {
return accountNumber;
}
public void setAccountNumber(int accountNumber) {
this.accountNumber = accountNumber;
}
public Double getBalance() {
return balance;
}
public void setBalance(Double balance) {
this.balance = balance;
}
public String getAccountType() {
return accountType;
}
public void setAccountType(String accountType) {
this.accountType = accountType;
}
public Account(int accountNumber, Double balance, String accountType) {
super();
this.accountNumber = accountNumber;
this.balance = balance;
this.accountType = accountType;
}
}
package com.bank2.Model;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import org.hibernate.annotations.Proxy;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#Entity
#Table(name="Customer")
#Proxy(lazy = false)
#JsonIgnoreProperties(ignoreUnknown = true)
public class Customer {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
Integer customerId;
#Column(name="customerName")
String customerName;
#OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL,targetEntity = Account.class)
#JoinColumn(name = "ca_fk",referencedColumnName ="customerId")
private List<Account> accounts;
public Customer() {
super();
}
public Customer(Integer customerId, String customerName, List<Account> accounts) {
super();
this.customerId = customerId;
this.customerName = customerName;
this.accounts = accounts;
}
public Integer getCustomerId() {
return customerId;
}
public void setCustomerId(Integer customerId) {
this.customerId = customerId;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public List<Account> getAccount() {
return accounts;
}
public void setAccount(List<Account> accounts) {
this.accounts = accounts;
}
#Override
public String toString() {
return "Customer [customerId=" + customerId + ", customerName=" + customerName + ", accounts=" + accounts + "]";
}
}
My service classes are
package com.bank2.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.bank2.Model.Customer;
import com.bank2.repository.CustomerRepository;
#Service
public class CustomerService {
#Autowired
CustomerRepository customerRepository;
public Customer customerCreate(Customer customer) {
Customer x= customerRepository.save(customer);
return x;
}
}
package com.bank2.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.bank2.Model.Account;
import com.bank2.repository.AccountRepository;
#Service
public class AccountService {
#Autowired
AccountRepository accountRepository;
public Account findAccountById(int accountNumber) {
return accountRepository.getById(accountNumber);
}
}
my controller class are
package com.bank2.controller;
import java.util.Optional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.bank2.Exception.ResourceNotFoundException;
import com.bank2.Model.Account;
import com.bank2.ServiceImpl.AccountService;
#RestController
#RequestMapping("/account")
public class AccountController {
#Autowired
AccountService accountService;
#GetMapping("/{accountNumber}")
public ResponseEntity<?> getAccountById(#PathVariable("accountNumber") int accountNumber){
Account acc=accountService.findAccountById(accountNumber);
if(acc==null) {
throw new ResourceNotFoundException("Account [accountNumber="+accountNumber+"] can't be found");
}else {
return new ResponseEntity<>(acc,HttpStatus.FOUND);
}
}
package com.bank2.controller;
import java.util.Optional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.bank2.Exception.ResourceNotFoundException;
import com.bank2.Model.Customer;
import com.bank2.ServiceImpl.CustomerService;
#RestController
#RequestMapping("/customer")
public class CustomerController {
#Autowired
CustomerService customerService;
#PostMapping("/createCust")
public ResponseEntity<?> CreateCustomer(#RequestBody Customer customer){
Customer cus=customerService.customerCreate(customer);
Optional<Customer> cus1 = Optional.ofNullable(cus);
if(cus1.isEmpty()) {
throw new ResourceNotFoundException("customer not created!!");
}else {
return new ResponseEntity<>(cus,HttpStatus.CREATED);
}
}
}
my expection classes are
package com.bank2.Exception;
import java.time.LocalDateTime;
import java.util.List;
import org.springframework.http.HttpStatus;
public class ApiErrors {
String message;
List<String> details;
HttpStatus status;
LocalDateTime timestamp;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public List<String> getDetails() {
return details;
}
public void setDetails(List<String> details) {
this.details = details;
}
public HttpStatus getStatus() {
return status;
}
public void setStatus(HttpStatus status) {
this.status = status;
}
public LocalDateTime getTimestamp() {
return timestamp;
}
public void setTimestamp(LocalDateTime timestamp) {
this.timestamp = timestamp;
}
public ApiErrors() {
super();
// TODO Auto-generated constructor stub
}
public ApiErrors(String message, List<String> details, HttpStatus status, LocalDateTime timestamp) {
super();
this.message = message;
this.details = details;
this.status = status;
this.timestamp = timestamp;
}
#Override
public String toString() {
return "ApiErrors [message=" + message + ", details=" + details + ", status=" + status + ", timestamp="
+ timestamp + "]";
}
}
package com.bank2.Exception;
public class ResourceNotFoundException extends RuntimeException{
/**
*
*/
private static final long serialVersionUID = 1L;
public ResourceNotFoundException() {
super();
}
public ResourceNotFoundException(String message) {
super(message);
}
}
package com.bank2.Exception;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.TypeMismatchException;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
#ControllerAdvice
public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
#ExceptionHandler(ResourceNotFoundException.class)
public ResponseEntity<Object> handleResourceNotFoundException(ResourceNotFoundException ex){
String msg=ex.getMessage();
List<String> details=new ArrayList<>();
details.add("Resource not found");
ApiErrors errors=new ApiErrors(msg,details,HttpStatus.BAD_REQUEST,LocalDateTime.now());
return new ResponseEntity<Object>(errors,HttpStatus.BAD_REQUEST);
}
#ExceptionHandler(Exception.class)
public ResponseEntity<Object> handleOther(Exception ex){
String msg=ex.getMessage();
List<String> details=new ArrayList<>();
details.add("Other Exceptions");
ApiErrors errors=new ApiErrors(msg,details,HttpStatus.INTERNAL_SERVER_ERROR,LocalDateTime.now());
return new ResponseEntity<Object>(errors,HttpStatus.INTERNAL_SERVER_ERROR);
}
}
This is the Internal server error I have gotten so far in Postman:
{
"message": "Unable to find com.bank2.Model.Account with id 1; nested exception is javax.persistence.EntityNotFoundException: Unable to find com.bank2.Model.Account with id 1",
"details": [
"Other Exceptions"
],
"status": "INTERNAL_SERVER_ERROR",
"timestamp": "2022-04-02T22:09:28.0486246"
}
My repositories are
'''
package com.bank2.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.bank2.Model.Account;
#Repository
public interface AccountRepository extends JpaRepository<Account, Integer> {
}
'''
'''
package com.bank2.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.bank2.Model.Customer;
#Repository
public interface CustomerRepository extends JpaRepository<Customer, Integer> {
}
'''

Answer 1

From the Documentation JpaRepository.html#getById-ID-
T getById(ID id)
Returns a reference to the entity with the
given identifier. Depending on how the JPA persistence provider is
implemented this is very likely to always return an instance and throw
an EntityNotFoundException on first access. Some of them will reject
invalid identifiers immediately.
The error message you get shows ...nested exception is EntityNotFoundException, so that could be normal...
So you could throw a ResourceNotFoundException in your service when the Account is not found.
#Service
public class AccountService {
public Account findAccountById(int accountNumber) {
try {
return accountRepository.getById(accountNumber);
} catch(EntityNotFoundException e) {
throw new ResourceNotFoundException("Account [accountNumber="+accountNumber+"] can't be found")
}
}