hoelee/cloudflared
1
0
Fork 0
mirror of https://github.com/cloudflare/cloudflared.git synced 2025-07-28 08:49:58 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

TUN-5989: Add in-memory otlp exporter

Browse Source
This commit is contained in:
Devin Carr
2022-04-06 16:20:29 -07:00
parent 9cde11f8e0
commit def8f57dbc
236 changed files with 33015 additions and 177 deletions
Download Patch File Download Diff File Expand all files Collapse all files

201
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/LICENSE generated vendored Normal file
View File

@@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

51
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/README.md generated vendored Normal file
View File

@@ -0,0 +1,51 @@
# OpenTelemetry-Go OTLP Span Exporter
[![Go Reference](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/otlp/otlptrace.svg)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace)
[OpenTelemetry Protocol Exporter](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.5.0/specification/protocol/exporter.md) implementation.
## Installation
```
go get -u go.opentelemetry.io/otel/exporters/otlp/otlptrace
```
## Examples
- [Exporter setup and examples](./otlptracehttp/example_test.go)
- [Full example sending telemetry to a local collector](../../../example/otel-collector)
## [`otlptrace`](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace)
The `otlptrace` package provides an exporter implementing the OTel span exporter interface.
This exporter is configured using a client satisfying the `otlptrace.Client` interface.
This client handles the transformation of data into wire format and the transmission of that data to the collector.
## [`otlptracegrpc`](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc)
The `otlptracegrpc` package implements a client for the span exporter that sends trace telemetry data to the collector using gRPC with protobuf-encoded payloads.
## [`otlptracehttp`](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp)
The `otlptracehttp` package implements a client for the span exporter that sends trace telemetry data to the collector using HTTP with protobuf-encoded payloads.
## Configuration
### Environment Variables
The following environment variables can be used (instead of options objects) to
override the default configuration. For more information about how each of
these environment variables is interpreted, see [the OpenTelemetry
specification](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.8.0/specification/protocol/exporter.md).
| Environment variable | Option | Default value |
| ------------------------------------------------------------------------ |------------------------------ | -------------------------------------------------------- |
| `OTEL_EXPORTER_OTLP_ENDPOINT` `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT` | `WithEndpoint` `WithInsecure` | `https://localhost:4317` or `https://localhost:4318`[^1] |
| `OTEL_EXPORTER_OTLP_CERTIFICATE` `OTEL_EXPORTER_OTLP_TRACES_CERTIFICATE` | `WithTLSClientConfig` | |
| `OTEL_EXPORTER_OTLP_HEADERS` `OTEL_EXPORTER_OTLP_TRACES_HEADERS` | `WithHeaders` | |
| `OTEL_EXPORTER_OTLP_COMPRESSION` `OTEL_EXPORTER_OTLP_TRACES_COMPRESSION` | `WithCompression` | |
| `OTEL_EXPORTER_OTLP_TIMEOUT` `OTEL_EXPORTER_OTLP_TRACES_TIMEOUT` | `WithTimeout` | `10s` |
[^1]: The gRPC client defaults to `https://localhost:4317` and the HTTP client `https://localhost:4318`.
Configuration using options have precedence over the environment variables.

54
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/clients.go generated vendored Normal file
View File

@@ -0,0 +1,54 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
import (
"context"
tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
)
// Client manages connections to the collector, handles the
// transformation of data into wire format, and the transmission of that
// data to the collector.
type Client interface {
// DO NOT CHANGE: any modification will not be backwards compatible and
// must never be done outside of a new major release.
// Start should establish connection(s) to endpoint(s). It is
// called just once by the exporter, so the implementation
// does not need to worry about idempotence and locking.
Start(ctx context.Context) error
// DO NOT CHANGE: any modification will not be backwards compatible and
// must never be done outside of a new major release.
// Stop should close the connections. The function is called
// only once by the exporter, so the implementation does not
// need to worry about idempotence, but it may be called
// concurrently with UploadTraces, so proper
// locking is required. The function serves as a
// synchronization point - after the function returns, the
// process of closing connections is assumed to be finished.
Stop(ctx context.Context) error
// DO NOT CHANGE: any modification will not be backwards compatible and
// must never be done outside of a new major release.
// UploadTraces should transform the passed traces to the wire
// format and send it to the collector. May be called
// concurrently.
UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) error
// DO NOT CHANGE: any modification will not be backwards compatible and
// must never be done outside of a new major release.
}

113
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/exporter.go generated vendored Normal file
View File

@@ -0,0 +1,113 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
import (
"context"
"errors"
"sync"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
tracesdk "go.opentelemetry.io/otel/sdk/trace"
)
var (
errAlreadyStarted = errors.New("already started")
)
// Exporter exports trace data in the OTLP wire format.
type Exporter struct {
client Client
mu sync.RWMutex
started bool
startOnce sync.Once
stopOnce sync.Once
}
// ExportSpans exports a batch of spans.
func (e *Exporter) ExportSpans(ctx context.Context, ss []tracesdk.ReadOnlySpan) error {
protoSpans := tracetransform.Spans(ss)
if len(protoSpans) == 0 {
return nil
}
return e.client.UploadTraces(ctx, protoSpans)
}
// Start establishes a connection to the receiving endpoint.
func (e *Exporter) Start(ctx context.Context) error {
var err = errAlreadyStarted
e.startOnce.Do(func() {
e.mu.Lock()
e.started = true
e.mu.Unlock()
err = e.client.Start(ctx)
})
return err
}
// Shutdown flushes all exports and closes all connections to the receiving endpoint.
func (e *Exporter) Shutdown(ctx context.Context) error {
e.mu.RLock()
started := e.started
e.mu.RUnlock()
if !started {
return nil
}
var err error
e.stopOnce.Do(func() {
err = e.client.Stop(ctx)
e.mu.Lock()
e.started = false
e.mu.Unlock()
})
return err
}
var _ tracesdk.SpanExporter = (*Exporter)(nil)
// New constructs a new Exporter and starts it.
func New(ctx context.Context, client Client) (*Exporter, error) {
exp := NewUnstarted(client)
if err := exp.Start(ctx); err != nil {
return nil, err
}
return exp, nil
}
// NewUnstarted constructs a new Exporter and does not start it.
func NewUnstarted(client Client) *Exporter {
return &Exporter{
client: client,
}
}
// MarshalLog is the marshaling function used by the logging system to represent this exporter.
func (e *Exporter) MarshalLog() interface{} {
return struct {
Type string
Client Client
}{
Type: "otlptrace",
Client: e.client,
}
}

158
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/attribute.go generated vendored Normal file
View File

@@ -0,0 +1,158 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
import (
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/sdk/resource"
commonpb "go.opentelemetry.io/proto/otlp/common/v1"
)
// KeyValues transforms a slice of attribute KeyValues into OTLP key-values.
func KeyValues(attrs []attribute.KeyValue) []*commonpb.KeyValue {
if len(attrs) == 0 {
return nil
}
out := make([]*commonpb.KeyValue, 0, len(attrs))
for _, kv := range attrs {
out = append(out, KeyValue(kv))
}
return out
}
// Iterator transforms an attribute iterator into OTLP key-values.
func Iterator(iter attribute.Iterator) []*commonpb.KeyValue {
l := iter.Len()
if l == 0 {
return nil
}
out := make([]*commonpb.KeyValue, 0, l)
for iter.Next() {
out = append(out, KeyValue(iter.Attribute()))
}
return out
}
// ResourceAttributes transforms a Resource OTLP key-values.
func ResourceAttributes(resource *resource.Resource) []*commonpb.KeyValue {
return Iterator(resource.Iter())
}
// KeyValue transforms an attribute KeyValue into an OTLP key-value.
func KeyValue(kv attribute.KeyValue) *commonpb.KeyValue {
return &commonpb.KeyValue{Key: string(kv.Key), Value: Value(kv.Value)}
}
// Value transforms an attribute Value into an OTLP AnyValue.
func Value(v attribute.Value) *commonpb.AnyValue {
av := new(commonpb.AnyValue)
switch v.Type() {
case attribute.BOOL:
av.Value = &commonpb.AnyValue_BoolValue{
BoolValue: v.AsBool(),
}
case attribute.BOOLSLICE:
av.Value = &commonpb.AnyValue_ArrayValue{
ArrayValue: &commonpb.ArrayValue{
Values: boolSliceValues(v.AsBoolSlice()),
},
}
case attribute.INT64:
av.Value = &commonpb.AnyValue_IntValue{
IntValue: v.AsInt64(),
}
case attribute.INT64SLICE:
av.Value = &commonpb.AnyValue_ArrayValue{
ArrayValue: &commonpb.ArrayValue{
Values: int64SliceValues(v.AsInt64Slice()),
},
}
case attribute.FLOAT64:
av.Value = &commonpb.AnyValue_DoubleValue{
DoubleValue: v.AsFloat64(),
}
case attribute.FLOAT64SLICE:
av.Value = &commonpb.AnyValue_ArrayValue{
ArrayValue: &commonpb.ArrayValue{
Values: float64SliceValues(v.AsFloat64Slice()),
},
}
case attribute.STRING:
av.Value = &commonpb.AnyValue_StringValue{
StringValue: v.AsString(),
}
case attribute.STRINGSLICE:
av.Value = &commonpb.AnyValue_ArrayValue{
ArrayValue: &commonpb.ArrayValue{
Values: stringSliceValues(v.AsStringSlice()),
},
}
default:
av.Value = &commonpb.AnyValue_StringValue{
StringValue: "INVALID",
}
}
return av
}
func boolSliceValues(vals []bool) []*commonpb.AnyValue {
converted := make([]*commonpb.AnyValue, len(vals))
for i, v := range vals {
converted[i] = &commonpb.AnyValue{
Value: &commonpb.AnyValue_BoolValue{
BoolValue: v,
},
}
}
return converted
}
func int64SliceValues(vals []int64) []*commonpb.AnyValue {
converted := make([]*commonpb.AnyValue, len(vals))
for i, v := range vals {
converted[i] = &commonpb.AnyValue{
Value: &commonpb.AnyValue_IntValue{
IntValue: v,
},
}
}
return converted
}
func float64SliceValues(vals []float64) []*commonpb.AnyValue {
converted := make([]*commonpb.AnyValue, len(vals))
for i, v := range vals {
converted[i] = &commonpb.AnyValue{
Value: &commonpb.AnyValue_DoubleValue{
DoubleValue: v,
},
}
}
return converted
}
func stringSliceValues(vals []string) []*commonpb.AnyValue {
converted := make([]*commonpb.AnyValue, len(vals))
for i, v := range vals {
converted[i] = &commonpb.AnyValue{
Value: &commonpb.AnyValue_StringValue{
StringValue: v,
},
}
}
return converted
}

30
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go generated vendored Normal file
View File

@@ -0,0 +1,30 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
import (
"go.opentelemetry.io/otel/sdk/instrumentation"
commonpb "go.opentelemetry.io/proto/otlp/common/v1"
)
func InstrumentationScope(il instrumentation.Library) *commonpb.InstrumentationScope {
if il == (instrumentation.Library{}) {
return nil
}
return &commonpb.InstrumentationScope{
Name: il.Name,
Version: il.Version,
}
}

28
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/resource.go generated vendored Normal file
View File

@@ -0,0 +1,28 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
import (
"go.opentelemetry.io/otel/sdk/resource"
resourcepb "go.opentelemetry.io/proto/otlp/resource/v1"
)
// Resource transforms a Resource into an OTLP Resource.
func Resource(r *resource.Resource) *resourcepb.Resource {
if r == nil {
return nil
}
return &resourcepb.Resource{Attributes: ResourceAttributes(r)}
}

205
vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go generated vendored Normal file
View File

@@ -0,0 +1,205 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
import (
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/sdk/instrumentation"
tracesdk "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
)
// Spans transforms a slice of OpenTelemetry spans into a slice of OTLP
// ResourceSpans.
func Spans(sdl []tracesdk.ReadOnlySpan) []*tracepb.ResourceSpans {
if len(sdl) == 0 {
return nil
}
rsm := make(map[attribute.Distinct]*tracepb.ResourceSpans)
type key struct {
r attribute.Distinct
il instrumentation.Library
}
ssm := make(map[key]*tracepb.ScopeSpans)
var resources int
for _, sd := range sdl {
if sd == nil {
continue
}
rKey := sd.Resource().Equivalent()
k := key{
r: rKey,
il: sd.InstrumentationLibrary(),
}
scopeSpan, iOk := ssm[k]
if !iOk {
// Either the resource or instrumentation library were unknown.
scopeSpan = &tracepb.ScopeSpans{
Scope: InstrumentationScope(sd.InstrumentationLibrary()),
Spans: []*tracepb.Span{},
SchemaUrl: sd.InstrumentationLibrary().SchemaURL,
}
}
scopeSpan.Spans = append(scopeSpan.Spans, span(sd))
ssm[k] = scopeSpan
rs, rOk := rsm[rKey]
if !rOk {
resources++
// The resource was unknown.
rs = &tracepb.ResourceSpans{
Resource: Resource(sd.Resource()),
ScopeSpans: []*tracepb.ScopeSpans{scopeSpan},
SchemaUrl: sd.Resource().SchemaURL(),
}
rsm[rKey] = rs
continue
}
// The resource has been seen before. Check if the instrumentation
// library lookup was unknown because if so we need to add it to the
// ResourceSpans. Otherwise, the instrumentation library has already
// been seen and the append we did above will be included it in the
// ScopeSpans reference.
if !iOk {
rs.ScopeSpans = append(rs.ScopeSpans, scopeSpan)
}
}
// Transform the categorized map into a slice
rss := make([]*tracepb.ResourceSpans, 0, resources)
for _, rs := range rsm {
rss = append(rss, rs)
}
return rss
}
// span transforms a Span into an OTLP span.
func span(sd tracesdk.ReadOnlySpan) *tracepb.Span {
if sd == nil {
return nil
}
tid := sd.SpanContext().TraceID()
sid := sd.SpanContext().SpanID()
s := &tracepb.Span{
TraceId: tid[:],
SpanId: sid[:],
TraceState: sd.SpanContext().TraceState().String(),
Status: status(sd.Status().Code, sd.Status().Description),
StartTimeUnixNano: uint64(sd.StartTime().UnixNano()),
EndTimeUnixNano: uint64(sd.EndTime().UnixNano()),
Links: links(sd.Links()),
Kind: spanKind(sd.SpanKind()),
Name: sd.Name(),
Attributes: KeyValues(sd.Attributes()),
Events: spanEvents(sd.Events()),
DroppedAttributesCount: uint32(sd.DroppedAttributes()),
DroppedEventsCount: uint32(sd.DroppedEvents()),
DroppedLinksCount: uint32(sd.DroppedLinks()),
}
if psid := sd.Parent().SpanID(); psid.IsValid() {
s.ParentSpanId = psid[:]
}
return s
}
// status transform a span code and message into an OTLP span status.
func status(status codes.Code, message string) *tracepb.Status {
var c tracepb.Status_StatusCode
switch status {
case codes.Ok:
c = tracepb.Status_STATUS_CODE_OK
case codes.Error:
c = tracepb.Status_STATUS_CODE_ERROR
default:
c = tracepb.Status_STATUS_CODE_UNSET
}
return &tracepb.Status{
Code: c,
Message: message,
}
}
// links transforms span Links to OTLP span links.
func links(links []tracesdk.Link) []*tracepb.Span_Link {
if len(links) == 0 {
return nil
}
sl := make([]*tracepb.Span_Link, 0, len(links))
for _, otLink := range links {
// This redefinition is necessary to prevent otLink.*ID[:] copies
// being reused -- in short we need a new otLink per iteration.
otLink := otLink
tid := otLink.SpanContext.TraceID()
sid := otLink.SpanContext.SpanID()
sl = append(sl, &tracepb.Span_Link{
TraceId: tid[:],
SpanId: sid[:],
Attributes: KeyValues(otLink.Attributes),
DroppedAttributesCount: uint32(otLink.DroppedAttributeCount),
})
}
return sl
}
// spanEvents transforms span Events to an OTLP span events.
func spanEvents(es []tracesdk.Event) []*tracepb.Span_Event {
if len(es) == 0 {
return nil
}
events := make([]*tracepb.Span_Event, len(es))
// Transform message events
for i := 0; i < len(es); i++ {
events[i] = &tracepb.Span_Event{
Name: es[i].Name,
TimeUnixNano: uint64(es[i].Time.UnixNano()),
Attributes: KeyValues(es[i].Attributes),
DroppedAttributesCount: uint32(es[i].DroppedAttributeCount),
}
}
return events
}
// spanKind transforms a SpanKind to an OTLP span kind.
func spanKind(kind trace.SpanKind) tracepb.Span_SpanKind {
switch kind {
case trace.SpanKindInternal:
return tracepb.Span_SPAN_KIND_INTERNAL
case trace.SpanKindClient:
return tracepb.Span_SPAN_KIND_CLIENT
case trace.SpanKindServer:
return tracepb.Span_SPAN_KIND_SERVER
case trace.SpanKindProducer:
return tracepb.Span_SPAN_KIND_PRODUCER
case trace.SpanKindConsumer:
return tracepb.Span_SPAN_KIND_CONSUMER
default:
return tracepb.Span_SPAN_KIND_UNSPECIFIED
}
}