我已经继承了这段代码,并且出于某种原因,原作者确实非常喜欢静态只读引用。对服务类使用静态只读引用有什么问题吗?
我已经在下面列出了一般模式,什么后果不具有这些静态只读引用有哪些?
public class DbAccess
{
private static readonly ISomethingFactory = SomethingFactories.GetFactory("1");
private static IThing1Dao Thing1Dao { get {return ISomethingFactory.Thing1Dao; }}
private static IThing2Dao Thing2Dao { get {return ISomethingFactory.Thing2Dao; }}
}
public class SomethingFactories
{
public static ISomethingFactory GetFactory(string key)
{
switch(key)
{
case "...":
return new SomeFactory();
}
}
}
public class SomeFactory : ISomeFactory
{
public IThing1Dao Thing1Dao
{
get { return new Thing1Dao(); }
}
}
public class SomeService : ISomeService
{
private static readonly IThing1Dao thing1Dao = DbAccess.Thing1Dao
private static readonly IThing2Dao thing2Dao = DbAccess.Thing2Dao
public Thing1Object1 GetObject1(int id)
{
return thing1Dao.GetObject1(id);
}
public Thing1Object2 GetObject2(int id)
{
return thing1Dao.GetObject2(id);
}
}
在.aspx页的使用是这样的:
public class MyBasePage : System.Web.UI.Page
{
protected static readonly SomeService someService = new SomeService();
}
public class SomeAspxPage : MyBasePage
{
void btnAddObject1(...)
{
Thing1Object1 obj1 = someService.GetObject(1);
}
}
所以不会有任何锁定/序列化问题? – loyalflow 2013-02-28 15:40:11
@ user1361315:任何锁定问题都取决于您所引用的对象以及您如何使用它。如果你想序列化属性,那么你有一个问题,因为静态成员不是序列化的,因为它们不是对象实例的一部分。 – Guffa 2013-02-28 15:44:00