Calling a stored procedure from Spring boot using JDBC template

DatabaseImpl.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;
import org.springframework.jdbc.core.simple.SimpleJdbcCall;
import org.springframework.stereotype.Repository;

import javax.annotation.PostConstruct;
import javax.sql.DataSource;
import java.util.Map;

@Repository
public class DatabaseImpl implements RegistrationDao {

    @Autowired
    DataSource dataSource;
    private JdbcTemplate jdbcTemplate;
    private SimpleJdbcCall spStoreTempData;

    @PostConstruct
    private void postConstruct() {
        jdbcTemplate = new JdbcTemplate(dataSource);
        spStoreTempData = new SimpleJdbcCall(jdbcTemplate).withProcedureName("STMT_TEMP_STORE");
    }

    @Override
    public Map<String, Object> storeTempData(String V_USER_TYPE, String V_REFID, String V_PHONE, String V_SCODE, String V_ID_NUMBER, String V_EMAIL,
                                             String V_TNC, String V_CHANNEL, String V_TEMP_UUID, String V_TOTP, String V_TOTP_EXPPERIOD, String V_SVC_TYPE, String V_REASON, String V_MAX_RETRIES) {
        SqlParameterSource in = new MapSqlParameterSource()
                .addValue("V_USER_TYPE", V_USER_TYPE)
                .addValue("V_REFID", V_REFID)
                .addValue("V_PHONE", V_PHONE)
                .addValue("V_SCODE", V_SCODE)
                .addValue("V_ID_NUMBER", V_ID_NUMBER)
                .addValue("V_EMAIL", V_EMAIL)
                .addValue("V_TNC", V_TNC)
                .addValue("V_CHANNEL", V_CHANNEL)
                .addValue("V_TEMP_UUID", V_TEMP_UUID)
                .addValue("V_TOTP", V_TOTP)
                .addValue("V_TOTP_EXPPERIOD", V_TOTP_EXPPERIOD)
                .addValue("V_SVC_TYPE", V_SVC_TYPE)
                .addValue("V_REASON", V_REASON)
                .addValue("V_MAX_RETRIES", V_MAX_RETRIES);


        return spStoreTempData.execute(in);
    }

}