Making Your Communication Objects Function in the Chain

As a programmer creating communication objects, you need to be certain that your communication object can successfully complete the following communication chain tasks:

• Your communication object must add itself to the communication chain.

• If a communication object that was added to the chain before your communication object was added removes itself from the chain, your communication object must respond to keep the chain intact.

• Your communication object must be able to remove itself from the chain and keep the chain intact.