Cannot serialize (Spring Boot)

Question

I was developing a simple application to learn redis caching. Until I add redis as a caching mechanism on spring boot project the API's works fine. REST project you can say. Using Postman for calling different API. After adding redis I saw that @CacheEvict which is used for deleting data works fine. But when I call request like GetMapping, PutMapping which annotated with @Cacheable, @CachePut doesn't work. I don't understand what is the problem where @CacheEvict working perfectly @Cacheable, @CachePut doesn't.

Here is the error given by postman when I'm calling API's using following url:
PUT: http://localhost:8080/bank/2/deposit
GET: http://localhost:8080/bank/holderName/Aysha

{
    "dateTime": "2024-03-30T16:49:17.7557062",
    "message": "Cannot serialize",
    "error": "uri=/bank/2/deposit",
    "path": "Bad Request"
}

Let me explain in more detail how I configured redis:

POM:

<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>

application.properties:

spring.cache.type=redis
spring.cache.redis.time-to-live=60000
spring.cache.redis.host=localhost
spring.cache.redis.port=6379

Account (Entity):

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Account implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String holderName;
    private double balance;
}

Here I enabled caching:

@SpringBootApplication
@EnableCaching
public class SimpleBankingApplication {

    @Bean
    public ModelMapper mapper(){
        return new ModelMapper();
    }

    public static void main(String[] args) {
        SpringApplication.run(SimpleBankingApplication.class, args);
    }

}

Controller class:

@Controller
@RequestMapping("bank")
@AllArgsConstructor
@CacheConfig(cacheNames = "account")
public class AccountController {
    private AccountService service;

    @PostMapping("createAccount")
    public ResponseEntity<AccountDTO> createAccount(@RequestBody @Valid AccountDTO dto){
        return new ResponseEntity<>(service.addAccount(dto), HttpStatus.CREATED);
    }
    @GetMapping("holderName/{name}")
    @Cacheable(value = "account", key = "#name")
    public ResponseEntity<AccountDTO> getAccountByName(@PathVariable String name){
        return new ResponseEntity<>(service.getAccount(name),HttpStatus.ACCEPTED);
    }
    @PutMapping("{id}/deposit")
    @CachePut(cacheNames = "account", key = "#id")
    public ResponseEntity<AccountDTO> deposit(@PathVariable Long id, @RequestBody Map<String, Double> request){
        Double value = request.get("balance");
        return new ResponseEntity<>(service.deposit(id,value), HttpStatus.ACCEPTED);
    }
    @PutMapping("{id}/withdraw")
    public ResponseEntity<AccountDTO> withdraw(@PathVariable Long id, @RequestBody Map<String, Double> request){
        Double value = request.get("withdraw_balance");
        return new ResponseEntity<>(service.withdraw(id,value), HttpStatus.ACCEPTED);
    }
    @GetMapping("allAccounts")
    public ResponseEntity<List<AccountDTO>> getAllAccount(){
        return new ResponseEntity<>(service.getAllAccounts(),HttpStatus.ACCEPTED);
    }
    @DeleteMapping("deleteAccount/{id}")
    @CacheEvict(cacheNames = "account", key = "#id", beforeInvocation = true)
    public ResponseEntity<String> deleteAccount(@PathVariable Long id){
        service.delete(id);
        return new ResponseEntity<>("Account has been deleted!!!", HttpStatus.ACCEPTED);
    }
}

Project link: view the project

Answer 1

Try implementing Serializable

public class AccountDTO implements Serializable {
//your fields, constructors, methods etc.
}

Here is the reference.