Files
RediStack/Sources/RediStackTestUtils
Nathan Harris e7b597fc65 Add support for PubSub
Motivation:

One of the great features of Redis is being able to subscribe and receive messages published to specific channels
as a way of acting as a message queue for processing jobs.

PubSub requires a specific understanding of the connection model that can only be implemented directly in this library.

Modifications:

- Add: `RedisPubSubHandler` to sit in front of `RedisCommandHandler` to manage subscription callbacks and Redis registration
- Add: `publish` and the `pubsub` commands
- Add: `addPubSubHandler` extension to `NIO.Channel`
- Add: Type-safe String wrapper of `RedisChannelName` for PubSub methods
- Add: `pubsubSubscriptionNotFound` error case
- Add: `isSubscribed` property to `RedisConnection`
- Add: `availableConnectionCount` and `leasedConnectionCount` properties to `RedisConnectionPool`
- Add: Metrics for PubSub
- Add: `makeNewPool` factory method to `RedisConnectionPoolIntegrationTestCase`
- Change: `RedisClient` to require methods for PubSub management, as they are intrinsicly tied to the client's connection model
- Change: Parsing of `PING` response for handling special case in PubSub mode
- Rename: `ActiveConnectionGauge` to `RedisMetrics.IncrementalGauge`

Result:

Developers will now be able to use Redis in PubSub mode with both connections and pools.

This resolves #6
2020-09-29 22:23:44 -07:00
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