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tracing.go
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tracing.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package objstore
import (
"context"
"io"
"github.com/opentracing/opentracing-go"
"github.com/thanos-io/thanos/pkg/tracing"
)
// TracingBucket includes bucket operations in the traces.
type TracingBucket struct {
bkt Bucket
}
func NewTracingBucket(bkt Bucket) InstrumentedBucket {
return TracingBucket{bkt: bkt}
}
func (t TracingBucket) Iter(ctx context.Context, dir string, f func(string) error, options ...IterOption) (err error) {
tracing.DoWithSpan(ctx, "bucket_iter", func(spanCtx context.Context, span opentracing.Span) {
span.LogKV("dir", dir)
err = t.bkt.Iter(spanCtx, dir, f, options...)
})
return
}
func (t TracingBucket) Get(ctx context.Context, name string) (io.ReadCloser, error) {
span, spanCtx := tracing.StartSpan(ctx, "bucket_get")
span.LogKV("name", name)
r, err := t.bkt.Get(spanCtx, name)
if err != nil {
span.LogKV("err", err)
span.Finish()
return nil, err
}
return &tracingReadCloser{r: r, s: span}, nil
}
func (t TracingBucket) GetRange(ctx context.Context, name string, off, length int64) (io.ReadCloser, error) {
span, spanCtx := tracing.StartSpan(ctx, "bucket_getrange")
span.LogKV("name", name, "offset", off, "length", length)
r, err := t.bkt.GetRange(spanCtx, name, off, length)
if err != nil {
span.LogKV("err", err)
span.Finish()
return nil, err
}
return &tracingReadCloser{r: r, s: span}, nil
}
func (t TracingBucket) Exists(ctx context.Context, name string) (exists bool, err error) {
tracing.DoWithSpan(ctx, "bucket_exists", func(spanCtx context.Context, span opentracing.Span) {
span.LogKV("name", name)
exists, err = t.bkt.Exists(spanCtx, name)
})
return
}
func (t TracingBucket) Attributes(ctx context.Context, name string) (attrs ObjectAttributes, err error) {
tracing.DoWithSpan(ctx, "bucket_attributes", func(spanCtx context.Context, span opentracing.Span) {
span.LogKV("name", name)
attrs, err = t.bkt.Attributes(spanCtx, name)
})
return
}
func (t TracingBucket) Upload(ctx context.Context, name string, r io.Reader) (err error) {
tracing.DoWithSpan(ctx, "bucket_upload", func(spanCtx context.Context, span opentracing.Span) {
span.LogKV("name", name)
err = t.bkt.Upload(spanCtx, name, r)
})
return
}
func (t TracingBucket) Delete(ctx context.Context, name string) (err error) {
tracing.DoWithSpan(ctx, "bucket_delete", func(spanCtx context.Context, span opentracing.Span) {
span.LogKV("name", name)
err = t.bkt.Delete(spanCtx, name)
})
return
}
func (t TracingBucket) Name() string {
return "tracing: " + t.bkt.Name()
}
func (t TracingBucket) Close() error {
return t.bkt.Close()
}
func (t TracingBucket) IsObjNotFoundErr(err error) bool {
return t.bkt.IsObjNotFoundErr(err)
}
func (t TracingBucket) WithExpectedErrs(expectedFunc IsOpFailureExpectedFunc) Bucket {
if ib, ok := t.bkt.(InstrumentedBucket); ok {
return TracingBucket{bkt: ib.WithExpectedErrs(expectedFunc)}
}
return t
}
func (t TracingBucket) ReaderWithExpectedErrs(expectedFunc IsOpFailureExpectedFunc) BucketReader {
return t.WithExpectedErrs(expectedFunc)
}
type tracingReadCloser struct {
r io.ReadCloser
s opentracing.Span
read int
}
func (t *tracingReadCloser) Read(p []byte) (int, error) {
n, err := t.r.Read(p)
if n > 0 {
t.read += n
}
if err != nil && err != io.EOF && t.s != nil {
t.s.LogKV("err", err)
}
return n, err
}
func (t *tracingReadCloser) Close() error {
err := t.r.Close()
if t.s != nil {
t.s.LogKV("read", t.read)
if err != nil {
t.s.LogKV("close err", err)
}
t.s.Finish()
t.s = nil
}
return err
}