Spring Boot consuming webservice with scheduler

Question

Hello I have RestController anotated class with a method like this:

@Bean
@GetMapping
@Scope("prototype")
public Info[] setInfo()
{
    return m_restTemplate.getForObject(m_url, Info[].class);
}

Here I can get info[] and I use it in my SQL table.

But web service continuously update Info objects that I get from m_url. I can only get this Info[] once at spring boot initialisation. And I have to restart the API to update my SQL table.

Here is a sample code with autowired info[]

@Autowired
public Info[] Infos;

public InfoRepository(NamedParameterJdbcTemplate m_jdbcTemplate) {
    this.m_jdbcTemplate = m_jdbcTemplate;
}


public <S extends Info> S update(S info) {
    m_jdbcTemplate.update(UPDATE_SQL, new BeanPropertySqlParameterSource(info));

    return info;
}

But when I try to run, I get the same object obviously. How can I call @GetMapping annotated method every time in scheduler :

private final InfoRepository m_infoRepository;
private ArrayList<Info> m_Infos;

public void update()
{
    Timer timer = new Timer();

    timer.schedule(new TimerTask() {
        @Override
        public void run() {
            m_coinInfos.forEach(i -> m_infoRepository.update(i));
        }
    }, 0, 2000);
}

Koziołek · Accepted Answer · 2021-09-21T15:48:47.680

1

You can use @Scheuled annotation like this:

@Scheduled(fixedDelay = 1000)
public void updateInfo() {
   // update call
}

In this case, it will be call update every second.

The other way is to change WS to broadcast information about change, but in that case you need access to code of that WS.

Edit after OP comment

In this case, you need some kind of Value Object pattern. Encapsulate your Info[] in some container, e.g. InfoStore:

@Component
class InfoStore{

   private Info[] info;

   public Info[] getInfo(){
     //...
   }
}

That will be injected into your beans. Now you can update Info[] every time you need and use every method you want. Your „main” bean will be injected once, but it „guts” can be change any time you need.

edited Sep 21 '21 at 15:48

answered Sep 21 '21 at 14:56

Koziołek

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Thank you. But it is not exactly my problem. I think I couldn't explain my problem. The InfoRepository class gets Info[] object once and it won't update it unless I restart the program. I tried to make Bean as prorotype but didn't work. I am kind of new at spring boot – iraquois Sep 21 '21 at 15:41
1

@iraquois I edited my answer – Koziołek Sep 21 '21 at 16:45
Thank you, I tried as you said and it worked. – iraquois Sep 24 '21 at 21:10

Spring Boot consuming webservice with scheduler

1 Answers1