Injection doesn't work

Support
#1

I created a bean called ProxyBean that contains a method called getProxies(). I’m trying to call this method from another java-class by injecting the bean. However, I get an Exception that says that the injected object is null. Is there any solutin?

Exception:
image

ProxyBean:

package com.company.tenderflow.managedBeans;

@Component(ProxyBean.NAME)
public class ProxyBean {

    @Inject
    private Persistence persistence;

    @Inject
    protected Authentication authentication;

    public static final String NAME = "tenderflow_ProxyBean";

    public void createTimer(){
        TimerTask task = new CheckTask();
        java.util.Timer timer = new java.util.Timer();
        timer.schedule(task, 0, 86400000);   //24h
    }

    public ArrayList<Proxy> getProxies(){
        ArrayList<Proxy> proxies = new ArrayList<>();
        int i=0;
        Transaction tx = persistence.createTransaction();
        try {
            EntityManager em = persistence.getEntityManager();
            Query query = em.createQuery(
                    "select e from tenderflow$Proxy e where e.state=true");
            List list = query.getResultList();
            proxies = new ArrayList<Proxy>(list);
            tx.commit();
        } finally {
            tx.end();
        }
        return proxies;
    }
}

java-class:

package com.company.tenderflow.parser;

public class Connector {

    @Inject
    private ProxyBean proxyBean;

    //For GET queryes
    public static Document getDoc(String url) {
        Connector con = new Connector();
        Proxy proxy = con.getProxy();
        Document doc = null;
        try {
            if (proxy!=null)
                doc = Jsoup.connect(url).proxy(proxy.getIp(), proxy.getPort()).timeout(30000).get();
            else
                doc = Jsoup.connect(url).timeout(30000).get();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return doc;
    }

    //For POST queryes
    public static Document getDoc(String url, HashMap<String, String> data) {
        Connector con = new Connector();
        Proxy proxy = con.getProxy();
        Document doc = null;

        try {
            if (proxy!=null)
                doc = Jsoup.connect(url).proxy(proxy.getIp(), proxy.getPort()).timeout(60000).data(data).post();
            else
                doc = Jsoup.connect(url).timeout(60000).data(data).post();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return doc;
    }

    public Proxy getProxy(){
        ArrayList<Proxy> proxies = proxyBean.getProxies();  // here the exception is thrown
        System.out.println("PROXIES: " + proxies.size());
        int i = 0 + (int) (Math.random() * proxies.size());
        System.out.println("PROXY: " + proxies.get(i));
        return proxies.size() > 0 ? proxies.get(i) : null;
    }
}

Does it make sense that these 2 classes are located in different packages but in the same core module?

#2

Hi,

As far as I can see, the second class (which tries to inject the ProxyBean) is not a bean. This means that you can’t use the injection mechanism. I would recommend you either define your class as a bean (using the @Component annotation) or obtain an instance of a bean using the AppBean.get() method.

Regards,
Gleb

#3

Thank you so much! Wasn’t aware of the ability to use AppBean.get(). That solved the issue!

#4

By the way, please use triple back quotes for code blocks.