mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-24 01:17:56 +08:00
353 lines
9.7 KiB
Go
353 lines
9.7 KiB
Go
package filer
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import (
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"container/heap"
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"context"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"github.com/seaweedfs/seaweedfs/weed/util/log_buffer"
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"github.com/seaweedfs/seaweedfs/weed/wdclient"
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"google.golang.org/protobuf/proto"
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"io"
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"math"
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"strings"
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"time"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/util"
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)
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type LogFileEntry struct {
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TsNs int64
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FileEntry *Entry
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}
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func (f *Filer) collectPersistedLogBuffer(startPosition log_buffer.MessagePosition, stopTsNs int64) (v *OrderedLogVisitor, err error) {
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if stopTsNs != 0 && startPosition.Time.UnixNano() > stopTsNs {
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return nil, io.EOF
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}
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startDate := fmt.Sprintf("%04d-%02d-%02d", startPosition.Year(), startPosition.Month(), startPosition.Day())
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dayEntries, _, listDayErr := f.ListDirectoryEntries(context.Background(), SystemLogDir, startDate, true, math.MaxInt32, "", "", "")
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if listDayErr != nil {
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return nil, fmt.Errorf("fail to list log by day: %v", listDayErr)
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}
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return NewOrderedLogVisitor(f, startPosition, stopTsNs, dayEntries)
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}
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// ----------
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type LogEntryItem struct {
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Entry *filer_pb.LogEntry
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filer string
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}
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// LogEntryItemPriorityQueue a priority queue for LogEntry
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type LogEntryItemPriorityQueue []*LogEntryItem
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func (pq LogEntryItemPriorityQueue) Len() int { return len(pq) }
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func (pq LogEntryItemPriorityQueue) Less(i, j int) bool {
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return pq[i].Entry.TsNs < pq[j].Entry.TsNs
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}
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func (pq LogEntryItemPriorityQueue) Swap(i, j int) { pq[i], pq[j] = pq[j], pq[i] }
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func (pq *LogEntryItemPriorityQueue) Push(x any) {
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item := x.(*LogEntryItem)
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*pq = append(*pq, item)
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}
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func (pq *LogEntryItemPriorityQueue) Pop() any {
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n := len(*pq)
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item := (*pq)[n-1]
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*pq = (*pq)[:n-1]
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return item
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}
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// ----------
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type OrderedLogVisitor struct {
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perFilerIteratorMap map[string]*LogFileQueueIterator
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pq *LogEntryItemPriorityQueue
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logFileEntryCollector *LogFileEntryCollector
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}
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func NewOrderedLogVisitor(f *Filer, startPosition log_buffer.MessagePosition, stopTsNs int64, dayEntries []*Entry) (*OrderedLogVisitor, error) {
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perFilerQueueMap := make(map[string]*LogFileQueueIterator)
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// initialize the priority queue
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pq := &LogEntryItemPriorityQueue{}
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heap.Init(pq)
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t := &OrderedLogVisitor{
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perFilerIteratorMap: perFilerQueueMap,
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pq: pq,
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logFileEntryCollector: NewLogFileEntryCollector(f, startPosition, stopTsNs, dayEntries),
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}
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if err := t.logFileEntryCollector.collectMore(t); err != nil && err != io.EOF {
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return nil, err
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}
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return t, nil
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}
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func (o *OrderedLogVisitor) GetNext() (logEntry *filer_pb.LogEntry, err error) {
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if o.pq.Len() == 0 {
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return nil, io.EOF
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}
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item := heap.Pop(o.pq).(*LogEntryItem)
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filerId := item.filer
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// fill the pq with the next log entry from the same filer
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it := o.perFilerIteratorMap[filerId]
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next, nextErr := it.getNext(o)
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if nextErr != nil {
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if nextErr == io.EOF {
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// do nothing since the filer has no more log entries
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}else {
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return nil, fmt.Errorf("failed to get next log entry: %v", nextErr)
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}
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} else {
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heap.Push(o.pq, &LogEntryItem{
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Entry: next,
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filer: filerId,
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})
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}
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return item.Entry, nil
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}
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func getFilerId(name string) string {
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idx := strings.LastIndex(name, ".")
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if idx < 0 {
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return ""
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}
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return name[idx+1:]
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}
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// ----------
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type LogFileEntryCollector struct {
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f *Filer
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startTsNs int64
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stopTsNs int64
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dayEntryQueue *util.Queue[*Entry]
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startDate string
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startHourMinute string
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stopDate string
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stopHourMinute string
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}
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func NewLogFileEntryCollector(f *Filer, startPosition log_buffer.MessagePosition, stopTsNs int64, dayEntries []*Entry) *LogFileEntryCollector {
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dayEntryQueue := util.NewQueue[*Entry]()
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for _, dayEntry := range dayEntries {
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dayEntryQueue.Enqueue(dayEntry)
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// println("enqueue day entry", dayEntry.Name())
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}
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startDate := fmt.Sprintf("%04d-%02d-%02d", startPosition.Year(), startPosition.Month(), startPosition.Day())
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startHourMinute := fmt.Sprintf("%02d-%02d", startPosition.Hour(), startPosition.Minute())
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var stopDate, stopHourMinute string
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if stopTsNs != 0 {
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stopTime := time.Unix(0, stopTsNs+24*60*60*int64(time.Nanosecond)).UTC()
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stopDate = fmt.Sprintf("%04d-%02d-%02d", stopTime.Year(), stopTime.Month(), stopTime.Day())
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stopHourMinute = fmt.Sprintf("%02d-%02d", stopTime.Hour(), stopTime.Minute())
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}
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return &LogFileEntryCollector{
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f: f,
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startTsNs: startPosition.UnixNano(),
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stopTsNs: stopTsNs,
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dayEntryQueue: dayEntryQueue,
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startDate: startDate,
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startHourMinute: startHourMinute,
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stopDate: stopDate,
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stopHourMinute: stopHourMinute,
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}
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}
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func (c *LogFileEntryCollector) hasMore() bool {
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return c.dayEntryQueue.Len() > 0
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}
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func (c *LogFileEntryCollector) collectMore(v *OrderedLogVisitor) (err error) {
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dayEntry := c.dayEntryQueue.Dequeue()
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if dayEntry == nil {
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return io.EOF
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}
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// println("dequeue day entry", dayEntry.Name())
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if c.stopDate != "" {
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if strings.Compare(dayEntry.Name(), c.stopDate) > 0 {
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return io.EOF
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}
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}
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hourMinuteEntries, _, listHourMinuteErr := c.f.ListDirectoryEntries(context.Background(), util.NewFullPath(SystemLogDir, dayEntry.Name()), "", false, math.MaxInt32, "", "", "")
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if listHourMinuteErr != nil {
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return fmt.Errorf("fail to list log %s by day: %v", dayEntry.Name(), listHourMinuteErr)
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}
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freshFilerIds := make(map[string]string)
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for _, hourMinuteEntry := range hourMinuteEntries {
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// println("checking hh-mm", hourMinuteEntry.FullPath)
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hourMinute := util.FileNameBase(hourMinuteEntry.Name())
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if dayEntry.Name() == c.startDate {
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if strings.Compare(hourMinute, c.startHourMinute) < 0 {
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continue
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}
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}
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if dayEntry.Name() == c.stopDate {
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if strings.Compare(hourMinute, c.stopHourMinute) > 0 {
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break
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}
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}
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tsMinute := fmt.Sprintf("%s-%s", dayEntry.Name(), hourMinute)
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// println(" enqueue", tsMinute)
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t, parseErr := time.Parse("2006-01-02-15-04", tsMinute)
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if parseErr != nil {
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glog.Errorf("failed to parse %s: %v", tsMinute, parseErr)
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continue
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}
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filerId := getFilerId(hourMinuteEntry.Name())
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iter, found := v.perFilerIteratorMap[filerId]
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if !found {
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iter = newLogFileQueueIterator(c.f.MasterClient, util.NewQueue[*LogFileEntry](), c.startTsNs, c.stopTsNs)
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v.perFilerIteratorMap[filerId] = iter
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freshFilerIds[filerId] = hourMinuteEntry.Name()
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}
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iter.q.Enqueue(&LogFileEntry{
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TsNs: t.UnixNano(),
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FileEntry: hourMinuteEntry,
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})
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}
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// fill the pq with the next log entry if it is a new filer
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for filerId, entryName := range freshFilerIds {
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iter, found := v.perFilerIteratorMap[filerId]
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if !found {
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glog.Errorf("Unexpected! failed to find iterator for filer %s", filerId)
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continue
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}
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next, nextErr := iter.getNext(v)
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if nextErr != nil {
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if nextErr == io.EOF {
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// do nothing since the filer has no more log entries
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}else {
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return fmt.Errorf("failed to get next log entry for %v: %v", entryName, err)
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}
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} else {
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heap.Push(v.pq, &LogEntryItem{
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Entry: next,
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filer: filerId,
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})
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}
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}
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return nil
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}
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// ----------
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type LogFileQueueIterator struct {
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q *util.Queue[*LogFileEntry]
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masterClient *wdclient.MasterClient
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startTsNs int64
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stopTsNs int64
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currentFileIterator *LogFileIterator
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}
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func newLogFileQueueIterator(masterClient *wdclient.MasterClient, q *util.Queue[*LogFileEntry], startTsNs, stopTsNs int64) *LogFileQueueIterator {
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return &LogFileQueueIterator{
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q: q,
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masterClient: masterClient,
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startTsNs: startTsNs,
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stopTsNs: stopTsNs,
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}
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}
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// getNext will return io.EOF when done
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func (iter *LogFileQueueIterator) getNext(v *OrderedLogVisitor) (logEntry *filer_pb.LogEntry, err error) {
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for {
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if iter.currentFileIterator != nil {
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logEntry, err = iter.currentFileIterator.getNext()
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if err != io.EOF {
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return
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}
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}
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// now either iter.currentFileIterator is nil or err is io.EOF
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if iter.q.Len() == 0 {
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return nil, io.EOF
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}
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t := iter.q.Dequeue()
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if t == nil {
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continue
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}
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// skip the file if it is after the stopTsNs
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if iter.stopTsNs != 0 && t.TsNs > iter.stopTsNs {
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return nil, io.EOF
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}
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next := iter.q.Peek()
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if next == nil {
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if collectErr := v.logFileEntryCollector.collectMore(v); collectErr != nil && collectErr != io.EOF {
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return nil, collectErr
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}
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}
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// skip the file if the next entry is before the startTsNs
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if next != nil && next.TsNs <= iter.startTsNs {
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continue
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}
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iter.currentFileIterator = newLogFileIterator(iter.masterClient, t.FileEntry, iter.startTsNs, iter.stopTsNs)
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}
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}
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// ----------
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type LogFileIterator struct {
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r io.Reader
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sizeBuf []byte
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startTsNs int64
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stopTsNs int64
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}
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func newLogFileIterator(masterClient *wdclient.MasterClient, fileEntry *Entry, startTsNs, stopTsNs int64) *LogFileIterator {
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return &LogFileIterator{
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r: NewChunkStreamReaderFromFiler(masterClient, fileEntry.Chunks),
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sizeBuf: make([]byte, 4),
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startTsNs: startTsNs,
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stopTsNs: stopTsNs,
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}
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}
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// getNext will return io.EOF when done
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func (iter *LogFileIterator) getNext() (logEntry *filer_pb.LogEntry, err error) {
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var n int
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for {
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n, err = iter.r.Read(iter.sizeBuf)
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if err != nil {
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return
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}
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if n != 4 {
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return nil, fmt.Errorf("size %d bytes, expected 4 bytes", n)
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}
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size := util.BytesToUint32(iter.sizeBuf)
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// println("entry size", size)
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entryData := make([]byte, size)
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n, err = iter.r.Read(entryData)
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if err != nil {
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return
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}
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if n != int(size) {
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return nil, fmt.Errorf("entry data %d bytes, expected %d bytes", n, size)
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}
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logEntry = &filer_pb.LogEntry{}
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if err = proto.Unmarshal(entryData, logEntry); err != nil {
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return
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}
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if logEntry.TsNs <= iter.startTsNs {
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continue
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}
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if iter.stopTsNs != 0 && logEntry.TsNs > iter.stopTsNs {
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return nil, io.EOF
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}
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return
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}
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}
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