Руслан Лопатин

@XmlRootElement(name = "super-xml")
@XmlSeeAlso(OtherSuperXml.class)
public class MySuperXml {
     @XmlElement(name = "number")
     private List<Long> numbers;
}
@XmlRootElement(name = "other-super-xml")
public class OtherSuperXml extends MySuperXml {
    @XmlElement(name = "name")
    private List<String> names;
}

public class Worker {

    private boolean destroy;
    private boolean destroyed;
    private counter;

    public void destroy() {
        synchronized (this) {
            if (this.destroyed) {
                return;
            }
            this.destroy = true;
            if (this.counter != 0) {
                return;
            }
            this.destroyed = true;
        }
        destroyImpl();
    }

    public void service(String arg) {
        synchronized (this) {
            if (this.destroy) {
                return;
            }
            ++this.counter;
        }
        serviceImpl(arg);
        synchronized (this) {
            if (--this.counter != 0) {
                return;
            }
            if (!this.destroy) {
                return;
            }
            this.destroyed = true;
        }
        destroyImpl()
    }

}

import java.io.IOException;

public class Run {
        public static void main(String[] args) {
                try {
                        new ProcessBuilder("/usr/bin/kwrite").start();
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }
}