COM+ Unleashed

Chapter 4. Persistent Storage

In This Chapter

• The IPersist Interfaces

• The IStream Interface

• Creating an ATL Object That Implements IPersistStreamInit

• Using an Object with Persistence

• Simplify Persistent Object Creation

• Simplify Persistent Object Use

One of the challenges that developers face is maintaining the state of a COM object. At runtime, when a COM object loads, it might be desirable for it to remember and revert to a previous state. In this case, the object would be loading persistent storage data so that it can resume operation in a previous state. When a COM object is destroyed, it might also find it necessary to save its state so that the current application, or another application, can assume a state identical to the state it was in when ...