UNPKG

@opentelemetry/tracing

Version:
83 lines 3.72 kB
/* * 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 * * https://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. */ import { diag } from '@opentelemetry/api'; import { AlwaysOffSampler, AlwaysOnSampler, getEnv, TracesSamplerValues, ParentBasedSampler, TraceIdRatioBasedSampler, } from '@opentelemetry/core'; var env = getEnv(); var FALLBACK_OTEL_TRACES_SAMPLER = TracesSamplerValues.AlwaysOn; /** * Default configuration. For fields with primitive values, any user-provided * value will override the corresponding default value. For fields with * non-primitive values (like `spanLimits`), the user-provided value will be * used to extend the default value. */ export var DEFAULT_CONFIG = { sampler: buildSamplerFromEnv(env), forceFlushTimeoutMillis: 30000, spanLimits: { attributeCountLimit: getEnv().OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, linkCountLimit: getEnv().OTEL_SPAN_LINK_COUNT_LIMIT, eventCountLimit: getEnv().OTEL_SPAN_EVENT_COUNT_LIMIT, }, }; /** * Based on environment, builds a sampler, complies with specification. * @param env optional, by default uses getEnv(), but allows passing a value to reuse parsed environment */ export function buildSamplerFromEnv(env) { if (env === void 0) { env = getEnv(); } switch (env.OTEL_TRACES_SAMPLER) { case TracesSamplerValues.AlwaysOn: return new AlwaysOnSampler(); case TracesSamplerValues.AlwaysOff: return new AlwaysOffSampler(); case TracesSamplerValues.ParentBasedAlwaysOn: return new ParentBasedSampler({ root: new AlwaysOnSampler(), }); case TracesSamplerValues.ParentBasedAlwaysOff: return new ParentBasedSampler({ root: new AlwaysOffSampler(), }); case TracesSamplerValues.TraceIdRatio: return new TraceIdRatioBasedSampler(getSamplerProbabilityFromEnv(env)); case TracesSamplerValues.ParentBasedTraceIdRatio: return new ParentBasedSampler({ root: new TraceIdRatioBasedSampler(getSamplerProbabilityFromEnv(env)), }); default: diag.error("OTEL_TRACES_SAMPLER value \"" + env.OTEL_TRACES_SAMPLER + " invalid, defaulting to " + FALLBACK_OTEL_TRACES_SAMPLER + "\"."); return new AlwaysOnSampler(); } } var DEFAULT_RATIO = 1; function getSamplerProbabilityFromEnv(env) { if (env.OTEL_TRACES_SAMPLER_ARG === undefined || env.OTEL_TRACES_SAMPLER_ARG === '') { diag.error("OTEL_TRACES_SAMPLER_ARG is blank, defaulting to " + DEFAULT_RATIO + "."); return DEFAULT_RATIO; } var probability = Number(env.OTEL_TRACES_SAMPLER_ARG); if (isNaN(probability)) { diag.error("OTEL_TRACES_SAMPLER_ARG=" + env.OTEL_TRACES_SAMPLER_ARG + " was given, but it is invalid, defaulting to " + DEFAULT_RATIO + "."); return DEFAULT_RATIO; } if (probability < 0 || probability > 1) { diag.error("OTEL_TRACES_SAMPLER_ARG=" + env.OTEL_TRACES_SAMPLER_ARG + " was given, but it is out of range ([0..1]), defaulting to " + DEFAULT_RATIO + "."); return DEFAULT_RATIO; } return probability; } //# sourceMappingURL=config.js.map