From 107c1cdb09c575aa2f61d97f48d8587eb6bada4c Mon Sep 17 00:00:00 2001 From: Nathan Dench Date: Fri, 24 May 2019 15:16:44 +1000 Subject: Upgrade to 0.12 --- vendor/go.opencensus.io/trace/basetypes.go | 114 +++++ vendor/go.opencensus.io/trace/config.go | 48 ++ vendor/go.opencensus.io/trace/doc.go | 53 +++ vendor/go.opencensus.io/trace/exemplar.go | 43 ++ vendor/go.opencensus.io/trace/export.go | 90 ++++ vendor/go.opencensus.io/trace/internal/internal.go | 21 + .../trace/propagation/propagation.go | 108 +++++ vendor/go.opencensus.io/trace/sampling.go | 75 +++ vendor/go.opencensus.io/trace/spanbucket.go | 130 ++++++ vendor/go.opencensus.io/trace/spanstore.go | 306 ++++++++++++ vendor/go.opencensus.io/trace/status_codes.go | 37 ++ vendor/go.opencensus.io/trace/trace.go | 516 +++++++++++++++++++++ vendor/go.opencensus.io/trace/trace_go11.go | 32 ++ vendor/go.opencensus.io/trace/trace_nongo11.go | 25 + .../trace/tracestate/tracestate.go | 147 ++++++ 15 files changed, 1745 insertions(+) create mode 100644 vendor/go.opencensus.io/trace/basetypes.go create mode 100644 vendor/go.opencensus.io/trace/config.go create mode 100644 vendor/go.opencensus.io/trace/doc.go create mode 100644 vendor/go.opencensus.io/trace/exemplar.go create mode 100644 vendor/go.opencensus.io/trace/export.go create mode 100644 vendor/go.opencensus.io/trace/internal/internal.go create mode 100644 vendor/go.opencensus.io/trace/propagation/propagation.go create mode 100644 vendor/go.opencensus.io/trace/sampling.go create mode 100644 vendor/go.opencensus.io/trace/spanbucket.go create mode 100644 vendor/go.opencensus.io/trace/spanstore.go create mode 100644 vendor/go.opencensus.io/trace/status_codes.go create mode 100644 vendor/go.opencensus.io/trace/trace.go create mode 100644 vendor/go.opencensus.io/trace/trace_go11.go create mode 100644 vendor/go.opencensus.io/trace/trace_nongo11.go create mode 100644 vendor/go.opencensus.io/trace/tracestate/tracestate.go (limited to 'vendor/go.opencensus.io/trace') diff --git a/vendor/go.opencensus.io/trace/basetypes.go b/vendor/go.opencensus.io/trace/basetypes.go new file mode 100644 index 0000000..01f0f90 --- /dev/null +++ b/vendor/go.opencensus.io/trace/basetypes.go @@ -0,0 +1,114 @@ +// Copyright 2017, OpenCensus 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 trace + +import ( + "fmt" + "time" +) + +type ( + // TraceID is a 16-byte identifier for a set of spans. + TraceID [16]byte + + // SpanID is an 8-byte identifier for a single span. + SpanID [8]byte +) + +func (t TraceID) String() string { + return fmt.Sprintf("%02x", t[:]) +} + +func (s SpanID) String() string { + return fmt.Sprintf("%02x", s[:]) +} + +// Annotation represents a text annotation with a set of attributes and a timestamp. +type Annotation struct { + Time time.Time + Message string + Attributes map[string]interface{} +} + +// Attribute represents a key-value pair on a span, link or annotation. +// Construct with one of: BoolAttribute, Int64Attribute, or StringAttribute. +type Attribute struct { + key string + value interface{} +} + +// BoolAttribute returns a bool-valued attribute. +func BoolAttribute(key string, value bool) Attribute { + return Attribute{key: key, value: value} +} + +// Int64Attribute returns an int64-valued attribute. +func Int64Attribute(key string, value int64) Attribute { + return Attribute{key: key, value: value} +} + +// StringAttribute returns a string-valued attribute. +func StringAttribute(key string, value string) Attribute { + return Attribute{key: key, value: value} +} + +// LinkType specifies the relationship between the span that had the link +// added, and the linked span. +type LinkType int32 + +// LinkType values. +const ( + LinkTypeUnspecified LinkType = iota // The relationship of the two spans is unknown. + LinkTypeChild // The current span is a child of the linked span. + LinkTypeParent // The current span is the parent of the linked span. +) + +// Link represents a reference from one span to another span. +type Link struct { + TraceID TraceID + SpanID SpanID + Type LinkType + // Attributes is a set of attributes on the link. + Attributes map[string]interface{} +} + +// MessageEventType specifies the type of message event. +type MessageEventType int32 + +// MessageEventType values. +const ( + MessageEventTypeUnspecified MessageEventType = iota // Unknown event type. + MessageEventTypeSent // Indicates a sent RPC message. + MessageEventTypeRecv // Indicates a received RPC message. +) + +// MessageEvent represents an event describing a message sent or received on the network. +type MessageEvent struct { + Time time.Time + EventType MessageEventType + MessageID int64 + UncompressedByteSize int64 + CompressedByteSize int64 +} + +// Status is the status of a Span. +type Status struct { + // Code is a status code. Zero indicates success. + // + // If Code will be propagated to Google APIs, it ideally should be a value from + // https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto . + Code int32 + Message string +} diff --git a/vendor/go.opencensus.io/trace/config.go b/vendor/go.opencensus.io/trace/config.go new file mode 100644 index 0000000..0816892 --- /dev/null +++ b/vendor/go.opencensus.io/trace/config.go @@ -0,0 +1,48 @@ +// Copyright 2018, OpenCensus 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 trace + +import ( + "sync" + + "go.opencensus.io/trace/internal" +) + +// Config represents the global tracing configuration. +type Config struct { + // DefaultSampler is the default sampler used when creating new spans. + DefaultSampler Sampler + + // IDGenerator is for internal use only. + IDGenerator internal.IDGenerator +} + +var configWriteMu sync.Mutex + +// ApplyConfig applies changes to the global tracing configuration. +// +// Fields not provided in the given config are going to be preserved. +func ApplyConfig(cfg Config) { + configWriteMu.Lock() + defer configWriteMu.Unlock() + c := *config.Load().(*Config) + if cfg.DefaultSampler != nil { + c.DefaultSampler = cfg.DefaultSampler + } + if cfg.IDGenerator != nil { + c.IDGenerator = cfg.IDGenerator + } + config.Store(&c) +} diff --git a/vendor/go.opencensus.io/trace/doc.go b/vendor/go.opencensus.io/trace/doc.go new file mode 100644 index 0000000..04b1ee4 --- /dev/null +++ b/vendor/go.opencensus.io/trace/doc.go @@ -0,0 +1,53 @@ +// Copyright 2017, OpenCensus 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 trace contains support for OpenCensus distributed tracing. + +The following assumes a basic familiarity with OpenCensus concepts. +See http://opencensus.io + + +Exporting Traces + +To export collected tracing data, register at least one exporter. You can use +one of the provided exporters or write your own. + + trace.RegisterExporter(exporter) + +By default, traces will be sampled relatively rarely. To change the sampling +frequency for your entire program, call ApplyConfig. Use a ProbabilitySampler +to sample a subset of traces, or use AlwaysSample to collect a trace on every run: + + trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()}) + +Be careful about using trace.AlwaysSample in a production application with +significant traffic: a new trace will be started and exported for every request. + +Adding Spans to a Trace + +A trace consists of a tree of spans. In Go, the current span is carried in a +context.Context. + +It is common to want to capture all the activity of a function call in a span. For +this to work, the function must take a context.Context as a parameter. Add these two +lines to the top of the function: + + ctx, span := trace.StartSpan(ctx, "example.com/Run") + defer span.End() + +StartSpan will create a new top-level span if the context +doesn't contain another span, otherwise it will create a child span. +*/ +package trace // import "go.opencensus.io/trace" diff --git a/vendor/go.opencensus.io/trace/exemplar.go b/vendor/go.opencensus.io/trace/exemplar.go new file mode 100644 index 0000000..416d805 --- /dev/null +++ b/vendor/go.opencensus.io/trace/exemplar.go @@ -0,0 +1,43 @@ +// Copyright 2018, OpenCensus 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 trace + +import ( + "context" + "encoding/hex" + + "go.opencensus.io/exemplar" +) + +func init() { + exemplar.RegisterAttachmentExtractor(attachSpanContext) +} + +func attachSpanContext(ctx context.Context, a exemplar.Attachments) exemplar.Attachments { + span := FromContext(ctx) + if span == nil { + return a + } + sc := span.SpanContext() + if !sc.IsSampled() { + return a + } + if a == nil { + a = make(exemplar.Attachments) + } + a[exemplar.KeyTraceID] = hex.EncodeToString(sc.TraceID[:]) + a[exemplar.KeySpanID] = hex.EncodeToString(sc.SpanID[:]) + return a +} diff --git a/vendor/go.opencensus.io/trace/export.go b/vendor/go.opencensus.io/trace/export.go new file mode 100644 index 0000000..77a8c73 --- /dev/null +++ b/vendor/go.opencensus.io/trace/export.go @@ -0,0 +1,90 @@ +// Copyright 2017, OpenCensus 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 trace + +import ( + "sync" + "sync/atomic" + "time" +) + +// Exporter is a type for functions that receive sampled trace spans. +// +// The ExportSpan method should be safe for concurrent use and should return +// quickly; if an Exporter takes a significant amount of time to process a +// SpanData, that work should be done on another goroutine. +// +// The SpanData should not be modified, but a pointer to it can be kept. +type Exporter interface { + ExportSpan(s *SpanData) +} + +type exportersMap map[Exporter]struct{} + +var ( + exporterMu sync.Mutex + exporters atomic.Value +) + +// RegisterExporter adds to the list of Exporters that will receive sampled +// trace spans. +// +// Binaries can register exporters, libraries shouldn't register exporters. +func RegisterExporter(e Exporter) { + exporterMu.Lock() + new := make(exportersMap) + if old, ok := exporters.Load().(exportersMap); ok { + for k, v := range old { + new[k] = v + } + } + new[e] = struct{}{} + exporters.Store(new) + exporterMu.Unlock() +} + +// UnregisterExporter removes from the list of Exporters the Exporter that was +// registered with the given name. +func UnregisterExporter(e Exporter) { + exporterMu.Lock() + new := make(exportersMap) + if old, ok := exporters.Load().(exportersMap); ok { + for k, v := range old { + new[k] = v + } + } + delete(new, e) + exporters.Store(new) + exporterMu.Unlock() +} + +// SpanData contains all the information collected by a Span. +type SpanData struct { + SpanContext + ParentSpanID SpanID + SpanKind int + Name string + StartTime time.Time + // The wall clock time of EndTime will be adjusted to always be offset + // from StartTime by the duration of the span. + EndTime time.Time + // The values of Attributes each have type string, bool, or int64. + Attributes map[string]interface{} + Annotations []Annotation + MessageEvents []MessageEvent + Status + Links []Link + HasRemoteParent bool +} diff --git a/vendor/go.opencensus.io/trace/internal/internal.go b/vendor/go.opencensus.io/trace/internal/internal.go new file mode 100644 index 0000000..1c8b9b3 --- /dev/null +++ b/vendor/go.opencensus.io/trace/internal/internal.go @@ -0,0 +1,21 @@ +// Copyright 2018, OpenCensus 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 internal provides trace internals. +package internal + +type IDGenerator interface { + NewTraceID() [16]byte + NewSpanID() [8]byte +} diff --git a/vendor/go.opencensus.io/trace/propagation/propagation.go b/vendor/go.opencensus.io/trace/propagation/propagation.go new file mode 100644 index 0000000..1eb190a --- /dev/null +++ b/vendor/go.opencensus.io/trace/propagation/propagation.go @@ -0,0 +1,108 @@ +// Copyright 2017, OpenCensus 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 propagation implements the binary trace context format. +package propagation // import "go.opencensus.io/trace/propagation" + +// TODO: link to external spec document. + +// BinaryFormat format: +// +// Binary value: +// version_id: 1 byte representing the version id. +// +// For version_id = 0: +// +// version_format: +// field_format: +// +// Fields: +// +// TraceId: (field_id = 0, len = 16, default = "0000000000000000") - 16-byte array representing the trace_id. +// SpanId: (field_id = 1, len = 8, default = "00000000") - 8-byte array representing the span_id. +// TraceOptions: (field_id = 2, len = 1, default = "0") - 1-byte array representing the trace_options. +// +// Fields MUST be encoded using the field id order (smaller to higher). +// +// Valid value example: +// +// {0, 0, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 1, 97, +// 98, 99, 100, 101, 102, 103, 104, 2, 1} +// +// version_id = 0; +// trace_id = {64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79} +// span_id = {97, 98, 99, 100, 101, 102, 103, 104}; +// trace_options = {1}; + +import ( + "net/http" + + "go.opencensus.io/trace" +) + +// Binary returns the binary format representation of a SpanContext. +// +// If sc is the zero value, Binary returns nil. +func Binary(sc trace.SpanContext) []byte { + if sc == (trace.SpanContext{}) { + return nil + } + var b [29]byte + copy(b[2:18], sc.TraceID[:]) + b[18] = 1 + copy(b[19:27], sc.SpanID[:]) + b[27] = 2 + b[28] = uint8(sc.TraceOptions) + return b[:] +} + +// FromBinary returns the SpanContext represented by b. +// +// If b has an unsupported version ID or contains no TraceID, FromBinary +// returns with ok==false. +func FromBinary(b []byte) (sc trace.SpanContext, ok bool) { + if len(b) == 0 || b[0] != 0 { + return trace.SpanContext{}, false + } + b = b[1:] + if len(b) >= 17 && b[0] == 0 { + copy(sc.TraceID[:], b[1:17]) + b = b[17:] + } else { + return trace.SpanContext{}, false + } + if len(b) >= 9 && b[0] == 1 { + copy(sc.SpanID[:], b[1:9]) + b = b[9:] + } + if len(b) >= 2 && b[0] == 2 { + sc.TraceOptions = trace.TraceOptions(b[1]) + } + return sc, true +} + +// HTTPFormat implementations propagate span contexts +// in HTTP requests. +// +// SpanContextFromRequest extracts a span context from incoming +// requests. +// +// SpanContextToRequest modifies the given request to include the given +// span context. +type HTTPFormat interface { + SpanContextFromRequest(req *http.Request) (sc trace.SpanContext, ok bool) + SpanContextToRequest(sc trace.SpanContext, req *http.Request) +} + +// TODO(jbd): Find a more representative but short name for HTTPFormat. diff --git a/vendor/go.opencensus.io/trace/sampling.go b/vendor/go.opencensus.io/trace/sampling.go new file mode 100644 index 0000000..71c10f9 --- /dev/null +++ b/vendor/go.opencensus.io/trace/sampling.go @@ -0,0 +1,75 @@ +// Copyright 2017, OpenCensus 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 trace + +import ( + "encoding/binary" +) + +const defaultSamplingProbability = 1e-4 + +// Sampler decides whether a trace should be sampled and exported. +type Sampler func(SamplingParameters) SamplingDecision + +// SamplingParameters contains the values passed to a Sampler. +type SamplingParameters struct { + ParentContext SpanContext + TraceID TraceID + SpanID SpanID + Name string + HasRemoteParent bool +} + +// SamplingDecision is the value returned by a Sampler. +type SamplingDecision struct { + Sample bool +} + +// ProbabilitySampler returns a Sampler that samples a given fraction of traces. +// +// It also samples spans whose parents are sampled. +func ProbabilitySampler(fraction float64) Sampler { + if !(fraction >= 0) { + fraction = 0 + } else if fraction >= 1 { + return AlwaysSample() + } + + traceIDUpperBound := uint64(fraction * (1 << 63)) + return Sampler(func(p SamplingParameters) SamplingDecision { + if p.ParentContext.IsSampled() { + return SamplingDecision{Sample: true} + } + x := binary.BigEndian.Uint64(p.TraceID[0:8]) >> 1 + return SamplingDecision{Sample: x < traceIDUpperBound} + }) +} + +// AlwaysSample returns a Sampler that samples every trace. +// Be careful about using this sampler in a production application with +// significant traffic: a new trace will be started and exported for every +// request. +func AlwaysSample() Sampler { + return func(p SamplingParameters) SamplingDecision { + return SamplingDecision{Sample: true} + } +} + +// NeverSample returns a Sampler that samples no traces. +func NeverSample() Sampler { + return func(p SamplingParameters) SamplingDecision { + return SamplingDecision{Sample: false} + } +} diff --git a/vendor/go.opencensus.io/trace/spanbucket.go b/vendor/go.opencensus.io/trace/spanbucket.go new file mode 100644 index 0000000..fbabad3 --- /dev/null +++ b/vendor/go.opencensus.io/trace/spanbucket.go @@ -0,0 +1,130 @@ +// Copyright 2017, OpenCensus 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 trace + +import ( + "time" +) + +// samplePeriod is the minimum time between accepting spans in a single bucket. +const samplePeriod = time.Second + +// defaultLatencies contains the default latency bucket bounds. +// TODO: consider defaults, make configurable +var defaultLatencies = [...]time.Duration{ + 10 * time.Microsecond, + 100 * time.Microsecond, + time.Millisecond, + 10 * time.Millisecond, + 100 * time.Millisecond, + time.Second, + 10 * time.Second, + time.Minute, +} + +// bucket is a container for a set of spans for a particular error code or latency range. +type bucket struct { + nextTime time.Time // next time we can accept a span + buffer []*SpanData // circular buffer of spans + nextIndex int // location next SpanData should be placed in buffer + overflow bool // whether the circular buffer has wrapped around +} + +func makeBucket(bufferSize int) bucket { + return bucket{ + buffer: make([]*SpanData, bufferSize), + } +} + +// add adds a span to the bucket, if nextTime has been reached. +func (b *bucket) add(s *SpanData) { + if s.EndTime.Before(b.nextTime) { + return + } + if len(b.buffer) == 0 { + return + } + b.nextTime = s.EndTime.Add(samplePeriod) + b.buffer[b.nextIndex] = s + b.nextIndex++ + if b.nextIndex == len(b.buffer) { + b.nextIndex = 0 + b.overflow = true + } +} + +// size returns the number of spans in the bucket. +func (b *bucket) size() int { + if b.overflow { + return len(b.buffer) + } + return b.nextIndex +} + +// span returns the ith span in the bucket. +func (b *bucket) span(i int) *SpanData { + if !b.overflow { + return b.buffer[i] + } + if i < len(b.buffer)-b.nextIndex { + return b.buffer[b.nextIndex+i] + } + return b.buffer[b.nextIndex+i-len(b.buffer)] +} + +// resize changes the size of the bucket to n, keeping up to n existing spans. +func (b *bucket) resize(n int) { + cur := b.size() + newBuffer := make([]*SpanData, n) + if cur < n { + for i := 0; i < cur; i++ { + newBuffer[i] = b.span(i) + } + b.buffer = newBuffer + b.nextIndex = cur + b.overflow = false + return + } + for i := 0; i < n; i++ { + newBuffer[i] = b.span(i + cur - n) + } + b.buffer = newBuffer + b.nextIndex = 0 + b.overflow = true +} + +// latencyBucket returns the appropriate bucket number for a given latency. +func latencyBucket(latency time.Duration) int { + i := 0 + for i < len(defaultLatencies) && latency >= defaultLatencies[i] { + i++ + } + return i +} + +// latencyBucketBounds returns the lower and upper bounds for a latency bucket +// number. +// +// The lower bound is inclusive, the upper bound is exclusive (except for the +// last bucket.) +func latencyBucketBounds(index int) (lower time.Duration, upper time.Duration) { + if index == 0 { + return 0, defaultLatencies[index] + } + if index == len(defaultLatencies) { + return defaultLatencies[index-1], 1<<63 - 1 + } + return defaultLatencies[index-1], defaultLatencies[index] +} diff --git a/vendor/go.opencensus.io/trace/spanstore.go b/vendor/go.opencensus.io/trace/spanstore.go new file mode 100644 index 0000000..c442d99 --- /dev/null +++ b/vendor/go.opencensus.io/trace/spanstore.go @@ -0,0 +1,306 @@ +// Copyright 2017, OpenCensus 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 trace + +import ( + "sync" + "time" + + "go.opencensus.io/internal" +) + +const ( + maxBucketSize = 100000 + defaultBucketSize = 10 +) + +var ( + ssmu sync.RWMutex // protects spanStores + spanStores = make(map[string]*spanStore) +) + +// This exists purely to avoid exposing internal methods used by z-Pages externally. +type internalOnly struct{} + +func init() { + //TODO(#412): remove + internal.Trace = &internalOnly{} +} + +// ReportActiveSpans returns the active spans for the given name. +func (i internalOnly) ReportActiveSpans(name string) []*SpanData { + s := spanStoreForName(name) + if s == nil { + return nil + } + var out []*SpanData + s.mu.Lock() + defer s.mu.Unlock() + for span := range s.active { + out = append(out, span.makeSpanData()) + } + return out +} + +// ReportSpansByError returns a sample of error spans. +// +// If code is nonzero, only spans with that status code are returned. +func (i internalOnly) ReportSpansByError(name string, code int32) []*SpanData { + s := spanStoreForName(name) + if s == nil { + return nil + } + var out []*SpanData + s.mu.Lock() + defer s.mu.Unlock() + if code != 0 { + if b, ok := s.errors[code]; ok { + for _, sd := range b.buffer { + if sd == nil { + break + } + out = append(out, sd) + } + } + } else { + for _, b := range s.errors { + for _, sd := range b.buffer { + if sd == nil { + break + } + out = append(out, sd) + } + } + } + return out +} + +// ConfigureBucketSizes sets the number of spans to keep per latency and error +// bucket for different span names. +func (i internalOnly) ConfigureBucketSizes(bcs []internal.BucketConfiguration) { + for _, bc := range bcs { + latencyBucketSize := bc.MaxRequestsSucceeded + if latencyBucketSize < 0 { + latencyBucketSize = 0 + } + if latencyBucketSize > maxBucketSize { + latencyBucketSize = maxBucketSize + } + errorBucketSize := bc.MaxRequestsErrors + if errorBucketSize < 0 { + errorBucketSize = 0 + } + if errorBucketSize > maxBucketSize { + errorBucketSize = maxBucketSize + } + spanStoreSetSize(bc.Name, latencyBucketSize, errorBucketSize) + } +} + +// ReportSpansPerMethod returns a summary of what spans are being stored for each span name. +func (i internalOnly) ReportSpansPerMethod() map[string]internal.PerMethodSummary { + out := make(map[string]internal.PerMethodSummary) + ssmu.RLock() + defer ssmu.RUnlock() + for name, s := range spanStores { + s.mu.Lock() + p := internal.PerMethodSummary{ + Active: len(s.active), + } + for code, b := range s.errors { + p.ErrorBuckets = append(p.ErrorBuckets, internal.ErrorBucketSummary{ + ErrorCode: code, + Size: b.size(), + }) + } + for i, b := range s.latency { + min, max := latencyBucketBounds(i) + p.LatencyBuckets = append(p.LatencyBuckets, internal.LatencyBucketSummary{ + MinLatency: min, + MaxLatency: max, + Size: b.size(), + }) + } + s.mu.Unlock() + out[name] = p + } + return out +} + +// ReportSpansByLatency returns a sample of successful spans. +// +// minLatency is the minimum latency of spans to be returned. +// maxLatency, if nonzero, is the maximum latency of spans to be returned. +func (i internalOnly) ReportSpansByLatency(name string, minLatency, maxLatency time.Duration) []*SpanData { + s := spanStoreForName(name) + if s == nil { + return nil + } + var out []*SpanData + s.mu.Lock() + defer s.mu.Unlock() + for i, b := range s.latency { + min, max := latencyBucketBounds(i) + if i+1 != len(s.latency) && max <= minLatency { + continue + } + if maxLatency != 0 && maxLatency < min { + continue + } + for _, sd := range b.buffer { + if sd == nil { + break + } + if minLatency != 0 || maxLatency != 0 { + d := sd.EndTime.Sub(sd.StartTime) + if d < minLatency { + continue + } + if maxLatency != 0 && d > maxLatency { + continue + } + } + out = append(out, sd) + } + } + return out +} + +// spanStore keeps track of spans stored for a particular span name. +// +// It contains all active spans; a sample of spans for failed requests, +// categorized by error code; and a sample of spans for successful requests, +// bucketed by latency. +type spanStore struct { + mu sync.Mutex // protects everything below. + active map[*Span]struct{} + errors map[int32]*bucket + latency []bucket + maxSpansPerErrorBucket int +} + +// newSpanStore creates a span store. +func newSpanStore(name string, latencyBucketSize int, errorBucketSize int) *spanStore { + s := &spanStore{ + active: make(map[*Span]struct{}), + latency: make([]bucket, len(defaultLatencies)+1), + maxSpansPerErrorBucket: errorBucketSize, + } + for i := range s.latency { + s.latency[i] = makeBucket(latencyBucketSize) + } + return s +} + +// spanStoreForName returns the spanStore for the given name. +// +// It returns nil if it doesn't exist. +func spanStoreForName(name string) *spanStore { + var s *spanStore + ssmu.RLock() + s, _ = spanStores[name] + ssmu.RUnlock() + return s +} + +// spanStoreForNameCreateIfNew returns the spanStore for the given name. +// +// It creates it if it didn't exist. +func spanStoreForNameCreateIfNew(name string) *spanStore { + ssmu.RLock() + s, ok := spanStores[name] + ssmu.RUnlock() + if ok { + return s + } + ssmu.Lock() + defer ssmu.Unlock() + s, ok = spanStores[name] + if ok { + return s + } + s = newSpanStore(name, defaultBucketSize, defaultBucketSize) + spanStores[name] = s + return s +} + +// spanStoreSetSize resizes the spanStore for the given name. +// +// It creates it if it didn't exist. +func spanStoreSetSize(name string, latencyBucketSize int, errorBucketSize int) { + ssmu.RLock() + s, ok := spanStores[name] + ssmu.RUnlock() + if ok { + s.resize(latencyBucketSize, errorBucketSize) + return + } + ssmu.Lock() + defer ssmu.Unlock() + s, ok = spanStores[name] + if ok { + s.resize(latencyBucketSize, errorBucketSize) + return + } + s = newSpanStore(name, latencyBucketSize, errorBucketSize) + spanStores[name] = s +} + +func (s *spanStore) resize(latencyBucketSize int, errorBucketSize int) { + s.mu.Lock() + for i := range s.latency { + s.latency[i].resize(latencyBucketSize) + } + for _, b := range s.errors { + b.resize(errorBucketSize) + } + s.maxSpansPerErrorBucket = errorBucketSize + s.mu.Unlock() +} + +// add adds a span to the active bucket of the spanStore. +func (s *spanStore) add(span *Span) { + s.mu.Lock() + s.active[span] = struct{}{} + s.mu.Unlock() +} + +// finished removes a span from the active set, and adds a corresponding +// SpanData to a latency or error bucket. +func (s *spanStore) finished(span *Span, sd *SpanData) { + latency := sd.EndTime.Sub(sd.StartTime) + if latency < 0 { + latency = 0 + } + code := sd.Status.Code + + s.mu.Lock() + delete(s.active, span) + if code == 0 { + s.latency[latencyBucket(latency)].add(sd) + } else { + if s.errors == nil { + s.errors = make(map[int32]*bucket) + } + if b := s.errors[code]; b != nil { + b.add(sd) + } else { + b := makeBucket(s.maxSpansPerErrorBucket) + s.errors[code] = &b + b.add(sd) + } + } + s.mu.Unlock() +} diff --git a/vendor/go.opencensus.io/trace/status_codes.go b/vendor/go.opencensus.io/trace/status_codes.go new file mode 100644 index 0000000..ec60eff --- /dev/null +++ b/vendor/go.opencensus.io/trace/status_codes.go @@ -0,0 +1,37 @@ +// Copyright 2018, OpenCensus 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 trace + +// Status codes for use with Span.SetStatus. These correspond to the status +// codes used by gRPC defined here: https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto +const ( + StatusCodeOK = 0 + StatusCodeCancelled = 1 + StatusCodeUnknown = 2 + StatusCodeInvalidArgument = 3 + StatusCodeDeadlineExceeded = 4 + StatusCodeNotFound = 5 + StatusCodeAlreadyExists = 6 + StatusCodePermissionDenied = 7 + StatusCodeResourceExhausted = 8 + StatusCodeFailedPrecondition = 9 + StatusCodeAborted = 10 + StatusCodeOutOfRange = 11 + StatusCodeUnimplemented = 12 + StatusCodeInternal = 13 + StatusCodeUnavailable = 14 + StatusCodeDataLoss = 15 + StatusCodeUnauthenticated = 16 +) diff --git a/vendor/go.opencensus.io/trace/trace.go b/vendor/go.opencensus.io/trace/trace.go new file mode 100644 index 0000000..9e5e5f0 --- /dev/null +++ b/vendor/go.opencensus.io/trace/trace.go @@ -0,0 +1,516 @@ +// Copyright 2017, OpenCensus 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 trace + +import ( + "context" + crand "crypto/rand" + "encoding/binary" + "fmt" + "math/rand" + "sync" + "sync/atomic" + "time" + + "go.opencensus.io/internal" + "go.opencensus.io/trace/tracestate" +) + +// Span represents a span of a trace. It has an associated SpanContext, and +// stores data accumulated while the span is active. +// +// Ideally users should interact with Spans by calling the functions in this +// package that take a Context parameter. +type Span struct { + // data contains information recorded about the span. + // + // It will be non-nil if we are exporting the span or recording events for it. + // Otherwise, data is nil, and the Span is simply a carrier for the + // SpanContext, so that the trace ID is propagated. + data *SpanData + mu sync.Mutex // protects the contents of *data (but not the pointer value.) + spanContext SpanContext + // spanStore is the spanStore this span belongs to, if any, otherwise it is nil. + *spanStore + endOnce sync.Once + + executionTracerTaskEnd func() // ends the execution tracer span +} + +// IsRecordingEvents returns true if events are being recorded for this span. +// Use this check to avoid computing expensive annotations when they will never +// be used. +func (s *Span) IsRecordingEvents() bool { + if s == nil { + return false + } + return s.data != nil +} + +// TraceOptions contains options associated with a trace span. +type TraceOptions uint32 + +// IsSampled returns true if the span will be exported. +func (sc SpanContext) IsSampled() bool { + return sc.TraceOptions.IsSampled() +} + +// setIsSampled sets the TraceOptions bit that determines whether the span will be exported. +func (sc *SpanContext) setIsSampled(sampled bool) { + if sampled { + sc.TraceOptions |= 1 + } else { + sc.TraceOptions &= ^TraceOptions(1) + } +} + +// IsSampled returns true if the span will be exported. +func (t TraceOptions) IsSampled() bool { + return t&1 == 1 +} + +// SpanContext contains the state that must propagate across process boundaries. +// +// SpanContext is not an implementation of context.Context. +// TODO: add reference to external Census docs for SpanContext. +type SpanContext struct { + TraceID TraceID + SpanID SpanID + TraceOptions TraceOptions + Tracestate *tracestate.Tracestate +} + +type contextKey struct{} + +// FromContext returns the Span stored in a context, or nil if there isn't one. +func FromContext(ctx context.Context) *Span { + s, _ := ctx.Value(contextKey{}).(*Span) + return s +} + +// NewContext returns a new context with the given Span attached. +func NewContext(parent context.Context, s *Span) context.Context { + return context.WithValue(parent, contextKey{}, s) +} + +// All available span kinds. Span kind must be either one of these values. +const ( + SpanKindUnspecified = iota + SpanKindServer + SpanKindClient +) + +// StartOptions contains options concerning how a span is started. +type StartOptions struct { + // Sampler to consult for this Span. If provided, it is always consulted. + // + // If not provided, then the behavior differs based on whether + // the parent of this Span is remote, local, or there is no parent. + // In the case of a remote parent or no parent, the + // default sampler (see Config) will be consulted. Otherwise, + // when there is a non-remote parent, no new sampling decision will be made: + // we will preserve the sampling of the parent. + Sampler Sampler + + // SpanKind represents the kind of a span. If none is set, + // SpanKindUnspecified is used. + SpanKind int +} + +// StartOption apply changes to StartOptions. +type StartOption func(*StartOptions) + +// WithSpanKind makes new spans to be created with the given kind. +func WithSpanKind(spanKind int) StartOption { + return func(o *StartOptions) { + o.SpanKind = spanKind + } +} + +// WithSampler makes new spans to be be created with a custom sampler. +// Otherwise, the global sampler is used. +func WithSampler(sampler Sampler) StartOption { + return func(o *StartOptions) { + o.Sampler = sampler + } +} + +// StartSpan starts a new child span of the current span in the context. If +// there is no span in the context, creates a new trace and span. +// +// Returned context contains the newly created span. You can use it to +// propagate the returned span in process. +func StartSpan(ctx context.Context, name string, o ...StartOption) (context.Context, *Span) { + var opts StartOptions + var parent SpanContext + if p := FromContext(ctx); p != nil { + parent = p.spanContext + } + for _, op := range o { + op(&opts) + } + span := startSpanInternal(name, parent != SpanContext{}, parent, false, opts) + + ctx, end := startExecutionTracerTask(ctx, name) + span.executionTracerTaskEnd = end + return NewContext(ctx, span), span +} + +// StartSpanWithRemoteParent starts a new child span of the span from the given parent. +// +// If the incoming context contains a parent, it ignores. StartSpanWithRemoteParent is +// preferred for cases where the parent is propagated via an incoming request. +// +// Returned context contains the newly created span. You can use it to +// propagate the returned span in process. +func StartSpanWithRemoteParent(ctx context.Context, name string, parent SpanContext, o ...StartOption) (context.Context, *Span) { + var opts StartOptions + for _, op := range o { + op(&opts) + } + span := startSpanInternal(name, parent != SpanContext{}, parent, true, opts) + ctx, end := startExecutionTracerTask(ctx, name) + span.executionTracerTaskEnd = end + return NewContext(ctx, span), span +} + +func startSpanInternal(name string, hasParent bool, parent SpanContext, remoteParent bool, o StartOptions) *Span { + span := &Span{} + span.spanContext = parent + + cfg := config.Load().(*Config) + + if !hasParent { + span.spanContext.TraceID = cfg.IDGenerator.NewTraceID() + } + span.spanContext.SpanID = cfg.IDGenerator.NewSpanID() + sampler := cfg.DefaultSampler + + if !hasParent || remoteParent || o.Sampler != nil { + // If this span is the child of a local span and no Sampler is set in the + // options, keep the parent's TraceOptions. + // + // Otherwise, consult the Sampler in the options if it is non-nil, otherwise + // the default sampler. + if o.Sampler != nil { + sampler = o.Sampler + } + span.spanContext.setIsSampled(sampler(SamplingParameters{ + ParentContext: parent, + TraceID: span.spanContext.TraceID, + SpanID: span.spanContext.SpanID, + Name: name, + HasRemoteParent: remoteParent}).Sample) + } + + if !internal.LocalSpanStoreEnabled && !span.spanContext.IsSampled() { + return span + } + + span.data = &SpanData{ + SpanContext: span.spanContext, + StartTime: time.Now(), + SpanKind: o.SpanKind, + Name: name, + HasRemoteParent: remoteParent, + } + if hasParent { + span.data.ParentSpanID = parent.SpanID + } + if internal.LocalSpanStoreEnabled { + var ss *spanStore + ss = spanStoreForNameCreateIfNew(name) + if ss != nil { + span.spanStore = ss + ss.add(span) + } + } + + return span +} + +// End ends the span. +func (s *Span) End() { + if s == nil { + return + } + if s.executionTracerTaskEnd != nil { + s.executionTracerTaskEnd() + } + if !s.IsRecordingEvents() { + return + } + s.endOnce.Do(func() { + exp, _ := exporters.Load().(exportersMap) + mustExport := s.spanContext.IsSampled() && len(exp) > 0 + if s.spanStore != nil || mustExport { + sd := s.makeSpanData() + sd.EndTime = internal.MonotonicEndTime(sd.StartTime) + if s.spanStore != nil { + s.spanStore.finished(s, sd) + } + if mustExport { + for e := range exp { + e.ExportSpan(sd) + } + } + } + }) +} + +// makeSpanData produces a SpanData representing the current state of the Span. +// It requires that s.data is non-nil. +func (s *Span) makeSpanData() *SpanData { + var sd SpanData + s.mu.Lock() + sd = *s.data + if s.data.Attributes != nil { + sd.Attributes = make(map[string]interface{}) + for k, v := range s.data.Attributes { + sd.Attributes[k] = v + } + } + s.mu.Unlock() + return &sd +} + +// SpanContext returns the SpanContext of the span. +func (s *Span) SpanContext() SpanContext { + if s == nil { + return SpanContext{} + } + return s.spanContext +} + +// SetName sets the name of the span, if it is recording events. +func (s *Span) SetName(name string) { + if !s.IsRecordingEvents() { + return + } + s.mu.Lock() + s.data.Name = name + s.mu.Unlock() +} + +// SetStatus sets the status of the span, if it is recording events. +func (s *Span) SetStatus(status Status) { + if !s.IsRecordingEvents() { + return + } + s.mu.Lock() + s.data.Status = status + s.mu.Unlock() +} + +// AddAttributes sets attributes in the span. +// +// Existing attributes whose keys appear in the attributes parameter are overwritten. +func (s *Span) AddAttributes(attributes ...Attribute) { + if !s.IsRecordingEvents() { + return + } + s.mu.Lock() + if s.data.Attributes == nil { + s.data.Attributes = make(map[string]interface{}) + } + copyAttributes(s.data.Attributes, attributes) + s.mu.Unlock() +} + +// copyAttributes copies a slice of Attributes into a map. +func copyAttributes(m map[string]interface{}, attributes []Attribute) { + for _, a := range attributes { + m[a.key] = a.value + } +} + +func (s *Span) lazyPrintfInternal(attributes []Attribute, format string, a ...interface{}) { + now := time.Now() + msg := fmt.Sprintf(format, a...) + var m map[string]interface{} + s.mu.Lock() + if len(attributes) != 0 { + m = make(map[string]interface{}) + copyAttributes(m, attributes) + } + s.data.Annotations = append(s.data.Annotations, Annotation{ + Time: now, + Message: msg, + Attributes: m, + }) + s.mu.Unlock() +} + +func (s *Span) printStringInternal(attributes []Attribute, str string) { + now := time.Now() + var a map[string]interface{} + s.mu.Lock() + if len(attributes) != 0 { + a = make(map[string]interface{}) + copyAttributes(a, attributes) + } + s.data.Annotations = append(s.data.Annotations, Annotation{ + Time: now, + Message: str, + Attributes: a, + }) + s.mu.Unlock() +} + +// Annotate adds an annotation with attributes. +// Attributes can be nil. +func (s *Span) Annotate(attributes []Attribute, str string) { + if !s.IsRecordingEvents() { + return + } + s.printStringInternal(attributes, str) +} + +// Annotatef adds an annotation with attributes. +func (s *Span) Annotatef(attributes []Attribute, format string, a ...interface{}) { + if !s.IsRecordingEvents() { + return + } + s.lazyPrintfInternal(attributes, format, a...) +} + +// AddMessageSendEvent adds a message send event to the span. +// +// messageID is an identifier for the message, which is recommended to be +// unique in this span and the same between the send event and the receive +// event (this allows to identify a message between the sender and receiver). +// For example, this could be a sequence id. +func (s *Span) AddMessageSendEvent(messageID, uncompressedByteSize, compressedByteSize int64) { + if !s.IsRecordingEvents() { + return + } + now := time.Now() + s.mu.Lock() + s.data.MessageEvents = append(s.data.MessageEvents, MessageEvent{ + Time: now, + EventType: MessageEventTypeSent, + MessageID: messageID, + UncompressedByteSize: uncompressedByteSize, + CompressedByteSize: compressedByteSize, + }) + s.mu.Unlock() +} + +// AddMessageReceiveEvent adds a message receive event to the span. +// +// messageID is an identifier for the message, which is recommended to be +// unique in this span and the same between the send event and the receive +// event (this allows to identify a message between the sender and receiver). +// For example, this could be a sequence id. +func (s *Span) AddMessageReceiveEvent(messageID, uncompressedByteSize, compressedByteSize int64) { + if !s.IsRecordingEvents() { + return + } + now := time.Now() + s.mu.Lock() + s.data.MessageEvents = append(s.data.MessageEvents, MessageEvent{ + Time: now, + EventType: MessageEventTypeRecv, + MessageID: messageID, + UncompressedByteSize: uncompressedByteSize, + CompressedByteSize: compressedByteSize, + }) + s.mu.Unlock() +} + +// AddLink adds a link to the span. +func (s *Span) AddLink(l Link) { + if !s.IsRecordingEvents() { + return + } + s.mu.Lock() + s.data.Links = append(s.data.Links, l) + s.mu.Unlock() +} + +func (s *Span) String() string { + if s == nil { + return "" + } + if s.data == nil { + return fmt.Sprintf("span %s", s.spanContext.SpanID) + } + s.mu.Lock() + str := fmt.Sprintf("span %s %q", s.spanContext.SpanID, s.data.Name) + s.mu.Unlock() + return str +} + +var config atomic.Value // access atomically + +func init() { + gen := &defaultIDGenerator{} + // initialize traceID and spanID generators. + var rngSeed int64 + for _, p := range []interface{}{ + &rngSeed, &gen.traceIDAdd, &gen.nextSpanID, &gen.spanIDInc, + } { + binary.Read(crand.Reader, binary.LittleEndian, p) + } + gen.traceIDRand = rand.New(rand.NewSource(rngSeed)) + gen.spanIDInc |= 1 + + config.Store(&Config{ + DefaultSampler: ProbabilitySampler(defaultSamplingProbability), + IDGenerator: gen, + }) +} + +type defaultIDGenerator struct { + sync.Mutex + + // Please keep these as the first fields + // so that these 8 byte fields will be aligned on addresses + // divisible by 8, on both 32-bit and 64-bit machines when + // performing atomic increments and accesses. + // See: + // * https://github.com/census-instrumentation/opencensus-go/issues/587 + // * https://github.com/census-instrumentation/opencensus-go/issues/865 + // * https://golang.org/pkg/sync/atomic/#pkg-note-BUG + nextSpanID uint64 + spanIDInc uint64 + + traceIDAdd [2]uint64 + traceIDRand *rand.Rand +} + +// NewSpanID returns a non-zero span ID from a randomly-chosen sequence. +func (gen *defaultIDGenerator) NewSpanID() [8]byte { + var id uint64 + for id == 0 { + id = atomic.AddUint64(&gen.nextSpanID, gen.spanIDInc) + } + var sid [8]byte + binary.LittleEndian.PutUint64(sid[:], id) + return sid +} + +// NewTraceID returns a non-zero trace ID from a randomly-chosen sequence. +// mu should be held while this function is called. +func (gen *defaultIDGenerator) NewTraceID() [16]byte { + var tid [16]byte + // Construct the trace ID from two outputs of traceIDRand, with a constant + // added to each half for additional entropy. + gen.Lock() + binary.LittleEndian.PutUint64(tid[0:8], gen.traceIDRand.Uint64()+gen.traceIDAdd[0]) + binary.LittleEndian.PutUint64(tid[8:16], gen.traceIDRand.Uint64()+gen.traceIDAdd[1]) + gen.Unlock() + return tid +} diff --git a/vendor/go.opencensus.io/trace/trace_go11.go b/vendor/go.opencensus.io/trace/trace_go11.go new file mode 100644 index 0000000..b7d8aaf --- /dev/null +++ b/vendor/go.opencensus.io/trace/trace_go11.go @@ -0,0 +1,32 @@ +// Copyright 2018, OpenCensus 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. + +// +build go1.11 + +package trace + +import ( + "context" + t "runtime/trace" +) + +func startExecutionTracerTask(ctx context.Context, name string) (context.Context, func()) { + if !t.IsEnabled() { + // Avoid additional overhead if + // runtime/trace is not enabled. + return ctx, func() {} + } + nctx, task := t.NewTask(ctx, name) + return nctx, task.End +} diff --git a/vendor/go.opencensus.io/trace/trace_nongo11.go b/vendor/go.opencensus.io/trace/trace_nongo11.go new file mode 100644 index 0000000..e254198 --- /dev/null +++ b/vendor/go.opencensus.io/trace/trace_nongo11.go @@ -0,0 +1,25 @@ +// Copyright 2018, OpenCensus 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. + +// +build !go1.11 + +package trace + +import ( + "context" +) + +func startExecutionTracerTask(ctx context.Context, name string) (context.Context, func()) { + return ctx, func() {} +} diff --git a/vendor/go.opencensus.io/trace/tracestate/tracestate.go b/vendor/go.opencensus.io/trace/tracestate/tracestate.go new file mode 100644 index 0000000..2d6c713 --- /dev/null +++ b/vendor/go.opencensus.io/trace/tracestate/tracestate.go @@ -0,0 +1,147 @@ +// Copyright 2018, OpenCensus 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 tracestate implements support for the Tracestate header of the +// W3C TraceContext propagation format. +package tracestate + +import ( + "fmt" + "regexp" +) + +const ( + keyMaxSize = 256 + valueMaxSize = 256 + maxKeyValuePairs = 32 +) + +const ( + keyWithoutVendorFormat = `[a-z][_0-9a-z\-\*\/]{0,255}` + keyWithVendorFormat = `[a-z][_0-9a-z\-\*\/]{0,240}@[a-z][_0-9a-z\-\*\/]{0,13}` + keyFormat = `(` + keyWithoutVendorFormat + `)|(` + keyWithVendorFormat + `)` + valueFormat = `[\x20-\x2b\x2d-\x3c\x3e-\x7e]{0,255}[\x21-\x2b\x2d-\x3c\x3e-\x7e]` +) + +var keyValidationRegExp = regexp.MustCompile(`^(` + keyFormat + `)$`) +var valueValidationRegExp = regexp.MustCompile(`^(` + valueFormat + `)$`) + +// Tracestate represents tracing-system specific context in a list of key-value pairs. Tracestate allows different +// vendors propagate additional information and inter-operate with their legacy Id formats. +type Tracestate struct { + entries []Entry +} + +// Entry represents one key-value pair in a list of key-value pair of Tracestate. +type Entry struct { + // Key is an opaque string up to 256 characters printable. It MUST begin with a lowercase letter, + // and can only contain lowercase letters a-z, digits 0-9, underscores _, dashes -, asterisks *, and + // forward slashes /. + Key string + + // Value is an opaque string up to 256 characters printable ASCII RFC0020 characters (i.e., the + // range 0x20 to 0x7E) except comma , and =. + Value string +} + +// Entries returns a slice of Entry. +func (ts *Tracestate) Entries() []Entry { + if ts == nil { + return nil + } + return ts.entries +} + +func (ts *Tracestate) remove(key string) *Entry { + for index, entry := range ts.entries { + if entry.Key == key { + ts.entries = append(ts.entries[:index], ts.entries[index+1:]...) + return &entry + } + } + return nil +} + +func (ts *Tracestate) add(entries []Entry) error { + for _, entry := range entries { + ts.remove(entry.Key) + } + if len(ts.entries)+len(entries) > maxKeyValuePairs { + return fmt.Errorf("adding %d key-value pairs to current %d pairs exceeds the limit of %d", + len(entries), len(ts.entries), maxKeyValuePairs) + } + ts.entries = append(entries, ts.entries...) + return nil +} + +func isValid(entry Entry) bool { + return keyValidationRegExp.MatchString(entry.Key) && + valueValidationRegExp.MatchString(entry.Value) +} + +func containsDuplicateKey(entries ...Entry) (string, bool) { + keyMap := make(map[string]int) + for _, entry := range entries { + if _, ok := keyMap[entry.Key]; ok { + return entry.Key, true + } + keyMap[entry.Key] = 1 + } + return "", false +} + +func areEntriesValid(entries ...Entry) (*Entry, bool) { + for _, entry := range entries { + if !isValid(entry) { + return &entry, false + } + } + return nil, true +} + +// New creates a Tracestate object from a parent and/or entries (key-value pair). +// Entries from the parent are copied if present. The entries passed to this function +// are inserted in front of those copied from the parent. If an entry copied from the +// parent contains the same key as one of the entry in entries then the entry copied +// from the parent is removed. See add func. +// +// An error is returned with nil Tracestate if +// 1. one or more entry in entries is invalid. +// 2. two or more entries in the input entries have the same key. +// 3. the number of entries combined from the parent and the input entries exceeds maxKeyValuePairs. +// (duplicate entry is counted only once). +func New(parent *Tracestate, entries ...Entry) (*Tracestate, error) { + if parent == nil && len(entries) == 0 { + return nil, nil + } + if entry, ok := areEntriesValid(entries...); !ok { + return nil, fmt.Errorf("key-value pair {%s, %s} is invalid", entry.Key, entry.Value) + } + + if key, duplicate := containsDuplicateKey(entries...); duplicate { + return nil, fmt.Errorf("contains duplicate keys (%s)", key) + } + + tracestate := Tracestate{} + + if parent != nil && len(parent.entries) > 0 { + tracestate.entries = append([]Entry{}, parent.entries...) + } + + err := tracestate.add(entries) + if err != nil { + return nil, err + } + return &tracestate, nil +} -- cgit v1.2.3