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log.go
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log.go
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package rdt
import "github.com/gritzko/ron"
type Log struct {
heap ron.FrameHeap
}
var LOG_UUID = ron.NewName("log")
func MakeLogReducer() ron.Reducer {
return Log{
heap: ron.MakeFrameHeap(ron.EventComparatorDesc, nil, 2),
}
}
func (log Log) Features() int {
return ron.ACID_FULL
}
func (log Log) Reduce(batch ron.Batch) ron.Frame {
log.heap.PutAll(batch)
spec := ron.NewSpec(
batch[0].Type(),
batch[0].Object(),
batch[len(batch)-1].Event(),
ron.ZERO_UUID,
)
re := ron.NewFrame()
re.AppendStateHeader(spec)
for !log.heap.EOF() && log.heap.Current().Event().Scheme() == ron.UUID_EVENT {
re.AppendReduced(*log.heap.Current())
log.heap.NextPrim()
}
log.heap.Clear()
return re
}
func init() {
ron.RDTYPES[LOG_UUID] = MakeLogReducer
}