单线器的线程安全

Question

所以我想说我有一个用Spring创建的单例，MyWebService。 MyWebService的目标是返回一个MyObject。

编辑：当我提交一个非线程安全的Object SomeBuilder并用它创建对象MyObject时，我猜这很危险。但是：如果我交出工厂，每次调用每个方法都会实例化一个新的SomeBuilder对象，我想我是安全的？

@Webservice
public class MyWebService {
private final SomeFactory someFactory;
private final SomeBuilder someBuilder;

  public MyWebService(SomeFactory someFactory, SomeBuilder someBuilder){
    this.someFactory=someFactory;
    this.someBuilder=someBuilder;
   }
    public MyObject getSomeObject(SomeArgs someArgs){
    //this is threadsafe?
   SomeBuilder newlyCreatedBuilder=  someFactory.createObjectBuilder();
return   newlyCreatedBuilder.getMyObject(someArgs);


//where as this is dangerous?
return someBuilder.getMyObject(someArgs);

}
}

Answer 1

是的，只要那些其他实现也是线程安全的，就可以在单例中使用对工厂或任何其他java类的引用。