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binwiederhier
6ae42e7590
One row per topic (first_seen_at, subscribed_at, rate visitor user and IP, updated_at), merged by rule (earliest, latest, last written) so the nodes can write in any order, synced by the package's own 5 s worker from a dirty set. User schema 10 -> 11 now creates this table.
46 lines
1.9 KiB
Go
46 lines
1.9 KiB
Go
package topic
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import (
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"time"
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)
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// Config configures the service
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type Config struct {
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Store *Store // Where the rows are shared with the other nodes and kept across restarts; nil for memory only
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}
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// RateVisitor is the subscriber who pays for the pushes to a UnifiedPush topic: its user, if it
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// was logged in, and its IP, masked to the server's prefix bits. Which of the two is charged is
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// decided on every push (see package server), so a tier change applies without a new subscribe.
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type RateVisitor struct {
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UserID string // Empty if the subscriber was anonymous
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IP string // The masked IP, never empty
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}
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// Topic is a topic's cluster-wide state as this node knows it (see Service.Get)
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type Topic struct {
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FirstSeenAt time.Time // Earliest observation on any node: a refused push, or the first subscribe
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SubscribedAt time.Time // Last subscriber activity on any node; zero if there was none yet (the topic was only pushed to)
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RateVisitor *RateVisitor // Who pays for the pushes; nil if nobody who may pay subscribed yet
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}
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// write is what an entry still has to write to the store; a rate visitor set here outranks a touch
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type write uint8
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const (
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writeNone write = iota
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writeTouch // The row as it is here (Touch, Keepalive, Note)
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writeRateVisitor // A rate visitor set here (SetRateVisitor): until written, the read-back does not replace it
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)
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// entry is one topic's row as this node knows it: the store's row as last read, merged with what
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// happened here since (see Service.applyNoLock for the rules)
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type entry struct {
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firstSeenAt int64 // Unix seconds
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subscribedAt int64 // Unix seconds; 0 if never
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userID string // The rate visitor's user ID, empty if anonymous or none
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ip string // The rate visitor's masked IP, empty if none
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updatedAt int64 // When the row was last written, by any node (unix seconds); the prune goes by it
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write write // Unwritten change, if any
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}
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