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feat: add endpoint to return a profile from a list of chunk IDs (#470)
* add endpoint to return a profile from a list of chunk IDs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package chunk | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "sort" | ||
|
|
||
| "github.com/getsentry/vroom/internal/measurements" | ||
| ) | ||
|
|
||
| func MergeChunks(chunks []Chunk) (Chunk, error) { | ||
| if len(chunks) == 0 { | ||
| return Chunk{}, nil | ||
| } | ||
| sort.Slice(chunks, func(i, j int) bool { | ||
| _, endFirstChunk := chunks[i].StartEndTimestamps() | ||
| startSecondChunk, _ := chunks[j].StartEndTimestamps() | ||
| return endFirstChunk <= startSecondChunk | ||
| }) | ||
|
|
||
| var mergedMeasurement = make(map[string]measurements.MeasurementV2) | ||
|
|
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| chunk := chunks[0] | ||
| if len(chunk.Measurements) > 0 { | ||
| err := json.Unmarshal(chunk.Measurements, &mergedMeasurement) | ||
| if err != nil { | ||
| return Chunk{}, err | ||
| } | ||
| } | ||
|
|
||
| for i := 1; i < len(chunks); i++ { | ||
| c := chunks[i] | ||
| // Update all the frame indices of the chunk we're going to add/merge | ||
| // to the first one. | ||
| // If the first chunk had a couple of frames, and the second chunk too, | ||
| // then all the stacks in the second chunk that refers to frames at index | ||
| // fr[0] and fr[1], once merged should refer to frames at index fr[2], fr[3]. | ||
| for j, stack := range c.Profile.Stacks { | ||
| for z, frameID := range stack { | ||
| c.Profile.Stacks[j][z] = frameID + len(chunk.Profile.Frames) | ||
| } | ||
| } | ||
| chunk.Profile.Frames = append(chunk.Profile.Frames, c.Profile.Frames...) | ||
| // The same goes for chunk samples stack IDs | ||
| for j, sample := range c.Profile.Samples { | ||
| c.Profile.Samples[j].StackID = sample.StackID + len(chunk.Profile.Stacks) | ||
| } | ||
| chunk.Profile.Stacks = append(chunk.Profile.Stacks, c.Profile.Stacks...) | ||
| chunk.Profile.Samples = append(chunk.Profile.Samples, c.Profile.Samples...) | ||
|
|
||
| // Update threadMetadata | ||
| for k, threadMetadata := range c.Profile.ThreadMetadata { | ||
| if _, ok := chunk.Profile.ThreadMetadata[k]; !ok { | ||
| chunk.Profile.ThreadMetadata[k] = threadMetadata | ||
| } | ||
| } | ||
|
|
||
| // In case we have measurements, merge them too | ||
| if len(c.Measurements) > 0 { | ||
| var chunkMeasurements map[string]measurements.MeasurementV2 | ||
| err := json.Unmarshal(c.Measurements, &chunkMeasurements) | ||
| if err != nil { | ||
| return Chunk{}, err | ||
| } | ||
| for k, measurement := range chunkMeasurements { | ||
| if el, ok := mergedMeasurement[k]; ok { | ||
| el.Values = append(el.Values, measurement.Values...) | ||
| mergedMeasurement[k] = el | ||
| } else { | ||
| mergedMeasurement[k] = measurement | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if len(mergedMeasurement) > 0 { | ||
| jsonRawMesaurement, err := json.Marshal(mergedMeasurement) | ||
| if err != nil { | ||
| return Chunk{}, err | ||
| } | ||
| chunk.Measurements = jsonRawMesaurement | ||
| } | ||
|
|
||
| return chunk, nil | ||
| } |
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