Ruhshan

List kafka topics

kafka-topics --bootstrap-server localhost:9092 --list

Delete kafka topic

kafka-topics --bootstrap-server localhost:9092 --delete --topic topic-message

Ruhshan

## solution to problem 1
def is_palindrome(n):
    if n < 0:
        return False
    
    s = str(n)

    flag = 0

    for c in s[:len(s)/2]:

Ruhshan

@EnableCaching
@Configuration
public class RedisConfig {


    private final RedisSerializer<String> stringSerializer = RedisSerializer.string();
    private final RedisSerializer<Object> objectRedisSerializer = RedisSerializer.json();

    private final Duration ttl = Duration.ofHours(6);

Ruhshan

@Service
@Slf4j
public class KeyValuePairServiceImpl implements KeyValuePairService {
    private final KeyValuePairRepository keyValuePairRepository;

    public KeyValuePairServiceImpl(KeyValuePairRepository keyValuePairRepository) {
        this.keyValuePairRepository = keyValuePairRepository;
    }

    @Override

Ruhshan

@Service
@Slf4j
public class KeyValuePairServiceImpl implements KeyValuePairService {
    private final KeyValuePairRepository keyValuePairRepository;
    private final RedisTemplate<String, Object> redisTemplate;
    private final ObjectMapper objectMapper;

    public KeyValuePairServiceImpl(KeyValuePairRepository keyValuePairRepository, RedisTemplate<String, Object> redisTemplate) {
        this.keyValuePairRepository = keyValuePairRepository;
        this.redisTemplate = redisTemplate;

Ruhshan

@Data
@Entity
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class KeyValuePair {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    protected Long id;
    private String key;

Ruhshan

public class ApplicationUser {
    @DocumentId
    private String id;
    private String username;
    private String password;
    private String imageUrl;
    private String bio;

}

Ruhshan

@Repository
public class UserRepository extends AbstractFirestoreRepository<User> {
    protected UserRepository(Firestore firestore) {
        super(firestore, "User");
    }
}

Ruhshan

@Slf4j
public abstract class AbstractFirestoreRepository<T> {
    private final CollectionReference collectionReference;
    private final String collectionName;
    private final Class<T> parameterizedType;

    protected AbstractFirestoreRepository(Firestore firestore, String collection) {
        this.collectionReference = firestore.collection(collection);
        this.collectionName = collection;
        this.parameterizedType = getParameterizedType();

Ruhshan

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface DocumentId {
}