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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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