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[chore][pkg/stanza] move file handling to internal package (open-tele…
…metry#31506) **Description:** Intrdocue a new internal package `tracker` to handle file operations.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
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| package tracker // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/internal/tracker" | ||
|
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| import ( | ||
| "go.uber.org/zap" | ||
|
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| "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/internal/fileset" | ||
| "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/internal/fingerprint" | ||
| "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/internal/reader" | ||
| ) | ||
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| type Tracker struct { | ||
| *zap.SugaredLogger | ||
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| maxBatchFiles int | ||
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| currentPollFiles *fileset.Fileset[*reader.Reader] | ||
| previousPollFiles *fileset.Fileset[*reader.Reader] | ||
| knownFiles []*fileset.Fileset[*reader.Metadata] | ||
| } | ||
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| func New(logger *zap.SugaredLogger, maxBatchFiles int) *Tracker { | ||
| knownFiles := make([]*fileset.Fileset[*reader.Metadata], 3) | ||
| for i := 0; i < len(knownFiles); i++ { | ||
| knownFiles[i] = fileset.New[*reader.Metadata](maxBatchFiles) | ||
| } | ||
| return &Tracker{ | ||
| SugaredLogger: logger.With("component", "fileconsumer"), | ||
| maxBatchFiles: maxBatchFiles, | ||
| currentPollFiles: fileset.New[*reader.Reader](maxBatchFiles), | ||
| previousPollFiles: fileset.New[*reader.Reader](maxBatchFiles), | ||
| knownFiles: knownFiles, | ||
| } | ||
| } | ||
|
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| func (t *Tracker) Add(reader *reader.Reader) { | ||
| // add a new reader for tracking | ||
| t.currentPollFiles.Add(reader) | ||
| } | ||
|
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| func (t *Tracker) GetCurrentFile(fp *fingerprint.Fingerprint) *reader.Reader { | ||
| return t.currentPollFiles.Match(fp, fileset.Equal) | ||
| } | ||
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| func (t *Tracker) GetOpenFile(fp *fingerprint.Fingerprint) *reader.Reader { | ||
| return t.previousPollFiles.Match(fp, fileset.StartsWith) | ||
| } | ||
|
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| func (t *Tracker) GetClosedFile(fp *fingerprint.Fingerprint) *reader.Metadata { | ||
| for i := 0; i < len(t.knownFiles); i++ { | ||
| if oldMetadata := t.knownFiles[i].Match(fp, fileset.StartsWith); oldMetadata != nil { | ||
| return oldMetadata | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
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| func (t *Tracker) GetMetadata() []*reader.Metadata { | ||
| // return all known metadata for checkpoining | ||
| allCheckpoints := make([]*reader.Metadata, 0, t.TotalReaders()) | ||
| for _, knownFiles := range t.knownFiles { | ||
| allCheckpoints = append(allCheckpoints, knownFiles.Get()...) | ||
| } | ||
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| for _, r := range t.previousPollFiles.Get() { | ||
| allCheckpoints = append(allCheckpoints, r.Metadata) | ||
| } | ||
| return allCheckpoints | ||
| } | ||
|
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| func (t *Tracker) LoadMetadata(metadata []*reader.Metadata) { | ||
| t.knownFiles[0].Add(metadata...) | ||
| } | ||
|
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| func (t *Tracker) CurrentPollFiles() []*reader.Reader { | ||
| return t.currentPollFiles.Get() | ||
| } | ||
|
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| func (t *Tracker) PreviousPollFiles() []*reader.Reader { | ||
| return t.previousPollFiles.Get() | ||
| } | ||
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| func (t *Tracker) ClosePreviousFiles() { | ||
| // t.previousPollFiles -> t.knownFiles[0] | ||
|
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| for r, _ := t.previousPollFiles.Pop(); r != nil; r, _ = t.previousPollFiles.Pop() { | ||
| t.knownFiles[0].Add(r.Close()) | ||
| } | ||
| } | ||
|
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| func (t *Tracker) EndPoll() { | ||
| // shift the filesets at end of every poll() call | ||
| // t.knownFiles[0] -> t.knownFiles[1] -> t.knownFiles[2] | ||
| copy(t.knownFiles[1:], t.knownFiles) | ||
| t.knownFiles[0] = fileset.New[*reader.Metadata](t.maxBatchFiles) | ||
| } | ||
|
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| func (t *Tracker) TotalReaders() int { | ||
| total := t.previousPollFiles.Len() | ||
| for i := 0; i < len(t.knownFiles); i++ { | ||
| total += t.knownFiles[i].Len() | ||
| } | ||
| return total | ||
| } |
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