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Redis

Pub/Sub

Broadcast messages to subscribed clients.

#pubsub#messaging#broadcast

Code

redis
# Subscriber (terminal 1)
SUBSCRIBE news alerts
PSUBSCRIBE log:*

# Publisher (terminal 2)
PUBLISH news "Server restarted"
PUBLISH log:error "Disk 80% full"

# Message format on subscriber:
# 1) "message"
# 2) "news"
# 3) "Server restarted"

# Pattern subscribe to all log:* channels
# PSUBSCRIBE log:*

# Lists vs pub/sub for durable queues:
# LPUSH + BRPOP keeps messages if no consumer is listening
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