98 lines
4.6 KiB
JavaScript
98 lines
4.6 KiB
JavaScript
/*
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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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import { diag } from '@opentelemetry/api';
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import { getEnv, TracesSamplerValues } from '@opentelemetry/core';
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import { AlwaysOffSampler } from './sampler/AlwaysOffSampler';
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import { AlwaysOnSampler } from './sampler/AlwaysOnSampler';
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import { ParentBasedSampler } from './sampler/ParentBasedSampler';
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import { TraceIdRatioBasedSampler } from './sampler/TraceIdRatioBasedSampler';
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var env = getEnv();
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var FALLBACK_OTEL_TRACES_SAMPLER = TracesSamplerValues.AlwaysOn;
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var DEFAULT_RATIO = 1;
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/**
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* Load default configuration. For fields with primitive values, any user-provided
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* value will override the corresponding default value. For fields with
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* non-primitive values (like `spanLimits`), the user-provided value will be
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* used to extend the default value.
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*/
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// object needs to be wrapped in this function and called when needed otherwise
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// envs are parsed before tests are ran - causes tests using these envs to fail
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export function loadDefaultConfig() {
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return {
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sampler: buildSamplerFromEnv(env),
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forceFlushTimeoutMillis: 30000,
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generalLimits: {
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attributeValueLengthLimit: getEnv().OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT,
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attributeCountLimit: getEnv().OTEL_ATTRIBUTE_COUNT_LIMIT,
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},
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spanLimits: {
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attributeValueLengthLimit: getEnv().OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT,
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attributeCountLimit: getEnv().OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT,
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linkCountLimit: getEnv().OTEL_SPAN_LINK_COUNT_LIMIT,
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eventCountLimit: getEnv().OTEL_SPAN_EVENT_COUNT_LIMIT,
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attributePerEventCountLimit: getEnv().OTEL_SPAN_ATTRIBUTE_PER_EVENT_COUNT_LIMIT,
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attributePerLinkCountLimit: getEnv().OTEL_SPAN_ATTRIBUTE_PER_LINK_COUNT_LIMIT,
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},
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};
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}
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/**
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* Based on environment, builds a sampler, complies with specification.
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* @param environment optional, by default uses getEnv(), but allows passing a value to reuse parsed environment
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*/
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export function buildSamplerFromEnv(environment) {
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if (environment === void 0) { environment = getEnv(); }
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switch (environment.OTEL_TRACES_SAMPLER) {
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case TracesSamplerValues.AlwaysOn:
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return new AlwaysOnSampler();
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case TracesSamplerValues.AlwaysOff:
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return new AlwaysOffSampler();
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case TracesSamplerValues.ParentBasedAlwaysOn:
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return new ParentBasedSampler({
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root: new AlwaysOnSampler(),
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});
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case TracesSamplerValues.ParentBasedAlwaysOff:
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return new ParentBasedSampler({
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root: new AlwaysOffSampler(),
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});
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case TracesSamplerValues.TraceIdRatio:
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return new TraceIdRatioBasedSampler(getSamplerProbabilityFromEnv(environment));
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case TracesSamplerValues.ParentBasedTraceIdRatio:
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return new ParentBasedSampler({
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root: new TraceIdRatioBasedSampler(getSamplerProbabilityFromEnv(environment)),
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});
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default:
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diag.error("OTEL_TRACES_SAMPLER value \"" + environment.OTEL_TRACES_SAMPLER + " invalid, defaulting to " + FALLBACK_OTEL_TRACES_SAMPLER + "\".");
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return new AlwaysOnSampler();
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}
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}
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function getSamplerProbabilityFromEnv(environment) {
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if (environment.OTEL_TRACES_SAMPLER_ARG === undefined ||
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environment.OTEL_TRACES_SAMPLER_ARG === '') {
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diag.error("OTEL_TRACES_SAMPLER_ARG is blank, defaulting to " + DEFAULT_RATIO + ".");
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return DEFAULT_RATIO;
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}
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var probability = Number(environment.OTEL_TRACES_SAMPLER_ARG);
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if (isNaN(probability)) {
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diag.error("OTEL_TRACES_SAMPLER_ARG=" + environment.OTEL_TRACES_SAMPLER_ARG + " was given, but it is invalid, defaulting to " + DEFAULT_RATIO + ".");
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return DEFAULT_RATIO;
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}
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if (probability < 0 || probability > 1) {
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diag.error("OTEL_TRACES_SAMPLER_ARG=" + environment.OTEL_TRACES_SAMPLER_ARG + " was given, but it is out of range ([0..1]), defaulting to " + DEFAULT_RATIO + ".");
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return DEFAULT_RATIO;
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}
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return probability;
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}
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//# sourceMappingURL=config.js.map
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