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108 lines
2.6 KiB
108 lines
2.6 KiB
package topic
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import (
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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"time"
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)
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const PartitionCount = 4096
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type Partition struct {
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RangeStart int32
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RangeStop int32 // exclusive
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RingSize int32
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UnixTimeNs int64 // in nanoseconds
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}
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func NewPartition(rangeStart, rangeStop, ringSize int32, unixTimeNs int64) *Partition {
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return &Partition{
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RangeStart: rangeStart,
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RangeStop: rangeStop,
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RingSize: ringSize,
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UnixTimeNs: unixTimeNs,
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}
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}
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func (partition Partition) Equals(other Partition) bool {
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if partition.RangeStart != other.RangeStart {
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return false
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}
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if partition.RangeStop != other.RangeStop {
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return false
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}
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if partition.RingSize != other.RingSize {
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return false
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}
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if partition.UnixTimeNs != other.UnixTimeNs {
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return false
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}
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return true
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}
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func FromPbPartition(partition *schema_pb.Partition) Partition {
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return Partition{
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RangeStart: partition.RangeStart,
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RangeStop: partition.RangeStop,
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RingSize: partition.RingSize,
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UnixTimeNs: partition.UnixTimeNs,
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}
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}
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func SplitPartitions(targetCount int32, ts int64) []*Partition {
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partitions := make([]*Partition, 0, targetCount)
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partitionSize := PartitionCount / targetCount
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for i := int32(0); i < targetCount; i++ {
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partitionStop := (i + 1) * partitionSize
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if i == targetCount-1 {
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partitionStop = PartitionCount
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}
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partitions = append(partitions, &Partition{
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RangeStart: i * partitionSize,
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RangeStop: partitionStop,
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RingSize: PartitionCount,
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UnixTimeNs: ts,
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})
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}
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return partitions
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}
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func (partition Partition) ToPbPartition() *schema_pb.Partition {
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return &schema_pb.Partition{
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RangeStart: partition.RangeStart,
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RangeStop: partition.RangeStop,
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RingSize: partition.RingSize,
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UnixTimeNs: partition.UnixTimeNs,
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}
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}
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func (partition Partition) Overlaps(partition2 Partition) bool {
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if partition.RangeStart >= partition2.RangeStop {
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return false
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}
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if partition.RangeStop <= partition2.RangeStart {
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return false
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}
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return true
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}
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func (partition Partition) String() string {
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return fmt.Sprintf("%04d-%04d", partition.RangeStart, partition.RangeStop)
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}
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func ParseTopicVersion(name string) (t time.Time, err error) {
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return time.Parse(PartitionGenerationFormat, name)
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}
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func ParsePartitionBoundary(name string) (start, stop int32) {
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_, err := fmt.Sscanf(name, "%04d-%04d", &start, &stop)
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if err != nil {
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return 0, 0
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}
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return start, stop
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}
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func PartitionDir(t Topic, p Partition) string {
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partitionGeneration := time.Unix(0, p.UnixTimeNs).UTC().Format(PartitionGenerationFormat)
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return fmt.Sprintf("%s/%s/%04d-%04d", t.Dir(), partitionGeneration, p.RangeStart, p.RangeStop)
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}
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