reading-notes

🗒️ Class 13: Message Queues

Readings

Socket.io Chat Example

• Explain to a non-technical recruiter what the Chat Example (above) does.

  The example in the Socket.io Chat Example reading allows its users to send messages to each other.

• What proof of life are we getting on the backend from the above app?

  Listening on *: 3000

• Socket.IO gives us the i0.emit() method to send an event to everyone. What flag would you use if you want to send a - message to everyone except for a certain emitting socket?

  To send a message to everyone except the sender, you would use socket.broadcast.emit

Rooms

• What is a room and how might a room be useful?

  A room is a socket channel.

• How do you join a room?

  By using socket.join

• how do you leave a room?

  By calling the disconnect event

Namespaces

• What is a Namespace and what does it allow you to do?

  A namespace is a specific chanmnel that lets you split the logic of the application and allows for multiplexing

• Each namespace potentially has its own what? (hint: 3 things)

  Event Handler, room, and middleware.

• Discuss a possible use case for separate namespaces

  One possible use case for using separate namespaces is if we want to create seperate “rooms/channels” that have restricted access.