Is it worth using Pattern here?

Hi Folks,
I have an application where a certain object is used by many JSPs or Servlets. While using objects, its hard to keep track of the status of that object. Because of that, JSPs and Servlets end up using that objects when its state is not valid to be referenced and throws expception. is there any Pattern that might help keep track the state of objects? or do i necessarily use a Pattern in situation like this? I would appreciate if you could provide some suggestion in regards to this situation. Thanks.

Not sure what makes your object be in an invalid state. However, you figure that out you could just provide a method called: isValid() returns boolean

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