Counter.java

import javax.enterprise.context.SessionScoped;
import java.io.Serializable;
import java.util.concurrent.atomic.AtomicInteger;

@SessionScoped
public class Counter implements Serializable {

    private AtomicInteger count = new AtomicInteger(0);

    public void increase() {
        count.addAndGet(1);
    }

    public Integer getCount() {
        return count.get();
    }

}

CounterWSImpl.java

import javax.inject.Inject;
import javax.jws.WebService;

@WebService(serviceName = "CounterWS", endpointInterface = "cz.zvestov.ws.CounterWS")
public class CounterWSImpl implements CounterWS {

    @Inject
    private Counter counter;

    @Override
    public void increase() {
        counter.increase();
    }

    @Override
    public Integer getCount() {
        return counter.getCount();
    }

}