Shulou(Shulou.com)06/01 Report--

RedisServer contains two important structures:

1. Channels: it is actually a Map structure of key-value. Key is the subscription channel, and value is the List of Client.

2. Patterns: list of storage mode + client addresses

Find the clients-list from the pubsub_channels that matches the channel in the publish, and then go to the pubsub_patterns to find each matching pattern and client. Send publish messages to these clients.

Log out the subscriber instance when the program terminates or the instance of the class is destroyed, otherwise the subscriber will always exist in the redis.

Redis publisher

Redis 127.0.0.1 Redis is a great caching technique 6379 > PUBLISH redisChat "Redis is a great caching technique"

(integer) 1

Redis 127.0.0.1 Learn redis by tutorials point 6379 > PUBLISH redisChat "Learn redis by tutorials point"

Redis subscriber side:

Redis 127.0.0.1 6379 > SUBSCRIBE redisChat

Reading messages... (press Ctrl-C to quit)

1) "subscribe"

2) "redisChat"

3) (integer) 1

Now, both clients publish redisChat messages with the same channel name and subscribe clients above to receive messages.

The published message will be received by multiple subscribers at the same time

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