Marc Mintel
5397309103
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66 lines
2.1 KiB
Plaintext
66 lines
2.1 KiB
Plaintext
"use strict";
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/*
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* Copyright The OpenTelemetry Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.RandomIdGenerator = void 0;
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const TRACE_ID_BYTES = 16;
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const SPAN_ID_BYTES = 8;
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const TRACE_BUFFER = new Uint8Array(TRACE_ID_BYTES);
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const SPAN_BUFFER = new Uint8Array(SPAN_ID_BYTES);
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// Byte-to-hex lookup is faster than toString(16) in browsers
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const HEX = Array.from({ length: 256 }, (_, i) => i.toString(16).padStart(2, '0'));
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/**
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* Fills buffer with random bytes, ensuring at least one is non-zero
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* per W3C Trace Context spec.
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*/
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function randomFill(buf) {
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for (let i = 0; i < buf.length; i++) {
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buf[i] = (Math.random() * 256) >>> 0;
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}
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// Ensure non-zero
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for (let i = 0; i < buf.length; i++) {
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if (buf[i] > 0)
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return;
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}
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buf[buf.length - 1] = 1;
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}
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function toHex(buf) {
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let hex = '';
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for (let i = 0; i < buf.length; i++) {
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hex += HEX[buf[i]];
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}
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return hex;
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}
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class RandomIdGenerator {
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/**
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* Returns a random 16-byte trace ID formatted/encoded as a 32 lowercase hex
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* characters corresponding to 128 bits.
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*/
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generateTraceId() {
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randomFill(TRACE_BUFFER);
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return toHex(TRACE_BUFFER);
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}
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/**
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* Returns a random 8-byte span ID formatted/encoded as a 16 lowercase hex
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* characters corresponding to 64 bits.
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*/
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generateSpanId() {
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randomFill(SPAN_BUFFER);
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return toHex(SPAN_BUFFER);
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}
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}
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exports.RandomIdGenerator = RandomIdGenerator;
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//# sourceMappingURL=RandomIdGenerator.js.map |