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90 lines
2.8 KiB
Go
90 lines
2.8 KiB
Go
package topic
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import (
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
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"github.com/seaweedfs/seaweedfs/weed/util/log_buffer"
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"time"
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)
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type LocalPartition struct {
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Partition
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isLeader bool
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FollowerBrokers []pb.ServerAddress
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logBuffer *log_buffer.LogBuffer
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ConsumerCount int32
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StopPublishersCh chan struct{}
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Publishers *LocalPartitionPublishers
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StopSubscribersCh chan struct{}
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Subscribers *LocalPartitionSubscribers
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}
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var TIME_FORMAT = "2006-01-02-15-04-05"
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func NewLocalPartition(partition Partition, isLeader bool, followerBrokers []pb.ServerAddress, logFlushFn log_buffer.LogFlushFuncType) *LocalPartition {
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return &LocalPartition{
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Partition: partition,
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isLeader: isLeader,
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FollowerBrokers: followerBrokers,
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logBuffer: log_buffer.NewLogBuffer(
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fmt.Sprintf("%d/%4d-%4d", partition.UnixTimeNs, partition.RangeStart, partition.RangeStop),
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2*time.Minute,
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logFlushFn,
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func() {
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},
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),
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Publishers: NewLocalPartitionPublishers(),
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Subscribers: NewLocalPartitionSubscribers(),
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}
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}
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type OnEachMessageFn func(logEntry *filer_pb.LogEntry) error
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func (p *LocalPartition) Publish(message *mq_pb.DataMessage) {
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p.logBuffer.AddToBuffer(message.Key, message.Value, time.Now().UnixNano())
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}
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func (p *LocalPartition) Subscribe(clientName string, startPosition log_buffer.MessagePosition, inMemoryOnly bool, onNoMessageFn func() bool, eachMessageFn OnEachMessageFn) {
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p.logBuffer.LoopProcessLogData(clientName, startPosition, inMemoryOnly, 0, onNoMessageFn, eachMessageFn)
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}
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func (p *LocalPartition) GetEarliestMessageTimeInMemory() time.Time {
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return p.logBuffer.GetEarliestTime()
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}
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func (p *LocalPartition) HasData() bool {
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return !p.logBuffer.GetEarliestTime().IsZero()
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}
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func (p *LocalPartition) GetEarliestInMemoryMessagePosition() log_buffer.MessagePosition {
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return p.logBuffer.GetEarliestPosition()
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}
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func FromPbBrokerPartitionAssignment(self pb.ServerAddress, assignment *mq_pb.BrokerPartitionAssignment, logFlushFn log_buffer.LogFlushFuncType) *LocalPartition {
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isLeader := assignment.LeaderBroker == string(self)
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followers := make([]pb.ServerAddress, len(assignment.FollowerBrokers))
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for i, followerBroker := range assignment.FollowerBrokers {
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followers[i] = pb.ServerAddress(followerBroker)
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}
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return NewLocalPartition(FromPbPartition(assignment.Partition), isLeader, followers, logFlushFn)
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}
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func (p *LocalPartition) closePublishers() {
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p.Publishers.SignalShutdown()
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close(p.StopPublishersCh)
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}
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func (p *LocalPartition) closeSubscribers() {
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p.Subscribers.SignalShutdown()
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}
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func (p *LocalPartition) WaitUntilNoPublishers() {
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for {
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if p.Publishers.IsEmpty() {
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return
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}
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time.Sleep(113 * time.Millisecond)
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}
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}
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