SingleThreadModel Interface
Hello here,
I am curious what really happens when we actually implements the SingleThreadModel Interface
It does not have any methods that we need to implement.
so what is really happening when i actually do that?
Also I note that even when i implements the SingleThreadModel Interface in the class,
the methods in the class have to be synchronized for .. can anybody explain the reason?
is SingleThreadModel Interface an empty interface?
[482 byte] By [
ylttana] at [2007-9-27 8:19:05]
SingleThreadModel is a marker interface (Serializable is another example) with no methods. The servlet engine checks whether a servlet implements the interface and then processes accordingly.
The API provides a good explanation:
If a servlet implements this interface, you are guaranteed that no two threads will execute concurrently in the servlet's service method. The servlet container can make this guarantee by synchronizing access to a single instance of the servlet, or by maintaining a pool of servlet instances and dispatching each new request to a free servlet.
This interface does not prevent synchronization problems that result from servlets accessing shared resources such as static class variables or classes outside the scope of the servlet.
