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140 lines
4.2 KiB
Go
140 lines
4.2 KiB
Go
package topic
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import (
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/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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"sync"
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"sync/atomic"
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"time"
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)
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type LocalPartition struct {
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ListenersWaits int64
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// notifying clients
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ListenersLock sync.Mutex
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ListenersCond *sync.Cond
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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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Publishers *LocalPartitionPublishers
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Subscribers *LocalPartitionSubscribers
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FollowerId int32
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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, readFromDiskFn log_buffer.LogReadFromDiskFuncType) *LocalPartition {
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lp := &LocalPartition{
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Partition: partition,
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isLeader: isLeader,
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FollowerBrokers: followerBrokers,
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Publishers: NewLocalPartitionPublishers(),
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Subscribers: NewLocalPartitionSubscribers(),
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}
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lp.ListenersCond = sync.NewCond(&lp.ListenersLock)
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lp.LogBuffer = log_buffer.NewLogBuffer(fmt.Sprintf("%d/%04d-%04d", partition.UnixTimeNs, partition.RangeStart, partition.RangeStop),
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2*time.Minute, logFlushFn, readFromDiskFn, func() {
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if atomic.LoadInt64(&lp.ListenersWaits) > 0 {
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lp.ListenersCond.Broadcast()
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}
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})
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return lp
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}
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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,
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onNoMessageFn func() bool, eachMessageFn log_buffer.EachLogEntryFuncType) error {
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var processedPosition log_buffer.MessagePosition
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var readPersistedLogErr error
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var readInMemoryLogErr error
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var isDone bool
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for {
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processedPosition, isDone, readPersistedLogErr = p.LogBuffer.ReadFromDiskFn(startPosition, 0, eachMessageFn)
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if readPersistedLogErr != nil {
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glog.V(0).Infof("%s read %v persisted log: %v", clientName, p.Partition, readPersistedLogErr)
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return readPersistedLogErr
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}
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if isDone {
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return nil
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}
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startPosition = processedPosition
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processedPosition, isDone, readInMemoryLogErr = p.LogBuffer.LoopProcessLogData(clientName, startPosition, 0, onNoMessageFn, eachMessageFn)
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if isDone {
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return nil
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}
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startPosition = processedPosition
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if readInMemoryLogErr == log_buffer.ResumeFromDiskError {
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continue
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}
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if readInMemoryLogErr != nil {
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glog.V(0).Infof("%s read %v in memory log: %v", clientName, p.Partition, readInMemoryLogErr)
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return readInMemoryLogErr
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}
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}
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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, partition Partition, assignment *mq_pb.BrokerPartitionAssignment, logFlushFn log_buffer.LogFlushFuncType, readFromDiskFn log_buffer.LogReadFromDiskFuncType) *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(partition, isLeader, followers, logFlushFn, readFromDiskFn)
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}
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func (p *LocalPartition) closePublishers() {
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p.Publishers.SignalShutdown()
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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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func (p *LocalPartition) MaybeShutdownLocalPartition() (hasShutdown bool) {
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if p.Publishers.IsEmpty() && p.Subscribers.IsEmpty() {
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p.LogBuffer.ShutdownLogBuffer()
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hasShutdown = true
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}
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return
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}
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func (p *LocalPartition) Shutdown() {
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p.closePublishers()
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p.closeSubscribers()
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p.LogBuffer.ShutdownLogBuffer()
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atomic.StoreInt32(&p.FollowerId, 0)
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}
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