Command Pattern

Use Command Pattern to achieve the following:

• Re-using of business logic across Web UI, REST API, and SOAP API.
• Having commands that execute a specific intent e.g. assign, close, monitor rather than just update.
• Enable core code to hook into such commands to handle side effects like email messages.
• Enable plugins code to hook in such commands to modify changes, block the change, post to slack, etc.
• Use exceptions that can be surfaced to APIs or Web UI.
• Enable having a clean model using ADODB or some higher level ORM library that is used by commands.