Podcast
Questions and Answers
What is the primary function of a transport?
What is the primary function of a transport?
- To publish events to a topic
- To receive events from a topic
- To establish a conversation between two peers
- To connect two peers (correct)
In a publish-subscribe model, what role does a publisher play?
In a publish-subscribe model, what role does a publisher play?
- Publishes events to a topic (correct)
- Establishes a conversation between peers
- Receives events from a topic
- Maintains a list of topics
What is a session in the context of peer communication?
What is a session in the context of peer communication?
- A conversation between two peers (correct)
- A topic maintained by a broker
- A connection between two peers
- A role played by a client
What is the role of a subscriber in a publish-subscribe model?
What is the role of a subscriber in a publish-subscribe model?
What is the relationship between a client and a role in a publish-subscribe model?
What is the relationship between a client and a role in a publish-subscribe model?
In an RPC model, what is the primary role of a caller?
In an RPC model, what is the primary role of a caller?
What is the role of a broker in a publish-subscribe model?
What is the role of a broker in a publish-subscribe model?
In an RPC model, what is the primary role of a callee?
In an RPC model, what is the primary role of a callee?
What is the role of a router in an RPC model?
What is the role of a router in an RPC model?
What is the relationship between a caller and a callee in an RPC model?
What is the relationship between a caller and a callee in an RPC model?
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Study Notes
Transport and Session
- Transport is a channel that connects two peers.
- A session is a conversation between two peers that runs over a transport.
Client Roles in Publish-Subscribe Model
- A client can have one or more roles.
- In the publish-subscribe model, a client can be a:
- Publisher: Publishes events (including payload) to the topic maintained by the Broker.
- Subscriber: Subscribes to the topics and receives the events including the payload.
RPC Model Roles
- In the RPC model, a client can have three main roles:
Caller
- Issues calls to remote procedures
- Provides call arguments along with the calls
Callee
- Executes the procedures called by the caller
- Returns the results back to the caller
Router
- Performs generic call and event routing
- Acts as a broker in the publish-subscribe model
Broker
- Routes messages published to a topic to all subscribers
- Subscribers are those who have subscribed to the topic
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