Note

Messaging Pattern

• One-One
• One-Many
• Many-One
• Many-Many
• Point to Point vs Pub Sub
• Fan out vs Fan in

Types of Message:

• Document
• Command
• Event
• Command vs RPC
• Passive Aggressive command

Model of communication

• Push vs Pull

Pattern with Message Brokers:

• Event Notification
• Event Carries state transfer
  • Schema Evolution Problem