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Merge pull request #448 from TarsCloud/per/traceid_spanid
perf(trace): optimize traceId and spanId generation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package trace | ||
|
|
||
| import ( | ||
| crand "crypto/rand" | ||
| "encoding/binary" | ||
| "encoding/hex" | ||
| "math/rand" | ||
| "sync" | ||
| ) | ||
|
|
||
| type randomIDGenerator struct { | ||
| sync.Mutex | ||
| randSource *rand.Rand | ||
| } | ||
|
|
||
| func newGenerator() *randomIDGenerator { | ||
| var rngSeed int64 | ||
| _ = binary.Read(crand.Reader, binary.LittleEndian, &rngSeed) | ||
| return &randomIDGenerator{randSource: rand.New(rand.NewSource(rngSeed))} | ||
| } | ||
|
|
||
| // NewSpanID returns a non-zero span ID from a randomly-chosen sequence. | ||
| func (gen *randomIDGenerator) NewSpanID() string { | ||
| gen.Lock() | ||
| defer gen.Unlock() | ||
| sid := [8]byte{} | ||
| _, _ = gen.randSource.Read(sid[:]) | ||
| return hex.EncodeToString(sid[:]) | ||
| } | ||
|
|
||
| // NewTraceID returns a non-zero trace ID from a randomly-chosen sequence. | ||
| func (gen *randomIDGenerator) NewTraceID() string { | ||
| gen.Lock() | ||
| defer gen.Unlock() | ||
| tid := [16]byte{} | ||
| _, _ = gen.randSource.Read(tid[:]) | ||
| return hex.EncodeToString(tid[:]) | ||
| } | ||
|
|
||
| // NewIDs returns a non-zero trace ID and a non-zero span ID from a | ||
| // randomly-chosen sequence. | ||
| func (gen *randomIDGenerator) NewIDs() (string, string) { | ||
| gen.Lock() | ||
| defer gen.Unlock() | ||
| tid := [16]byte{} | ||
| _, _ = gen.randSource.Read(tid[:]) | ||
| sid := [8]byte{} | ||
| _, _ = gen.randSource.Read(sid[:]) | ||
| return hex.EncodeToString(tid[:]), hex.EncodeToString(sid[:]) | ||
| } |
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