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package topic
import ( "fmt" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" "github.com/seaweedfs/seaweedfs/weed/pb/mq_pb" "github.com/seaweedfs/seaweedfs/weed/util/log_buffer" "time" )
type LocalPartition struct { Partition isLeader bool FollowerBrokers []pb.ServerAddress logBuffer *log_buffer.LogBuffer }
func NewLocalPartition(topic Topic, partition Partition, isLeader bool, followerBrokers []pb.ServerAddress) *LocalPartition { return &LocalPartition{ Partition: partition, isLeader: isLeader, FollowerBrokers: followerBrokers, logBuffer: log_buffer.NewLogBuffer( fmt.Sprintf("%s/%s/%4d-%4d", topic.Namespace, topic.Name, partition.RangeStart, partition.RangeStop), 2*time.Minute, func(startTime, stopTime time.Time, buf []byte) {
}, func() {
}, ), } }
type OnEachMessageFn func(logEntry *filer_pb.LogEntry) error
func (p LocalPartition) Publish(message *mq_pb.DataMessage) { p.logBuffer.AddToBuffer(message.Key, message.Value, time.Now().UnixNano()) }
func (p LocalPartition) Subscribe(clientName string, startReadTime time.Time, eachMessageFn OnEachMessageFn) { p.logBuffer.LoopProcessLogData(clientName, startReadTime, 0, func() bool { return true }, eachMessageFn) }
func FromPbBrokerPartitionAssignment(self pb.ServerAddress, assignment *mq_pb.BrokerPartitionAssignment) *LocalPartition { isLeaer := assignment.LeaderBroker == string(self) localPartition := &LocalPartition{ Partition: FromPbPartition(assignment.Partition), isLeader: isLeaer, } if !isLeaer { return localPartition } followers := make([]pb.ServerAddress, len(assignment.FollowerBrokers)) for i, follower := range assignment.FollowerBrokers { followers[i] = pb.ServerAddress(follower) } localPartition.FollowerBrokers = followers return localPartition }
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