64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package counters
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import (
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"database/sql"
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"sync/atomic"
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c "github.com/Azareal/Gosora/common"
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qgen "github.com/Azareal/Gosora/query_gen"
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"github.com/pkg/errors"
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)
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var TopicCounter *DefaultTopicCounter
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type DefaultTopicCounter struct {
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buckets [2]int64
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currentBucket int64
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insert *sql.Stmt
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}
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func NewTopicCounter() (*DefaultTopicCounter, error) {
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acc := qgen.NewAcc()
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co := &DefaultTopicCounter{
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currentBucket: 0,
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insert: acc.Insert("topicchunks").Columns("count,createdAt").Fields("?,UTC_TIMESTAMP()").Prepare(),
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}
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c.AddScheduledFifteenMinuteTask(co.Tick)
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//c.AddScheduledSecondTask(co.Tick)
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c.AddShutdownTask(co.Tick)
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return co, acc.FirstError()
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}
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func (co *DefaultTopicCounter) Tick() (err error) {
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oldBucket := co.currentBucket
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var nextBucket int64 // 0
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if co.currentBucket == 0 {
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nextBucket = 1
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}
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atomic.AddInt64(&co.buckets[oldBucket], co.buckets[nextBucket])
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atomic.StoreInt64(&co.buckets[nextBucket], 0)
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atomic.StoreInt64(&co.currentBucket, nextBucket)
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previousViewChunk := co.buckets[oldBucket]
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atomic.AddInt64(&co.buckets[oldBucket], -previousViewChunk)
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err = co.insertChunk(previousViewChunk)
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if err != nil {
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return errors.Wrap(errors.WithStack(err), "topics counter")
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}
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return nil
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}
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func (co *DefaultTopicCounter) Bump() {
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atomic.AddInt64(&co.buckets[co.currentBucket], 1)
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}
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func (co *DefaultTopicCounter) insertChunk(count int64) error {
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if count == 0 {
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return nil
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}
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c.DebugLogf("Inserting a topicchunk with a count of %d", count)
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_, err := co.insert.Exec(count)
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return err
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}
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