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// SPDX-License-Identifier: Apache-2.0
import * as fs from 'fs';
import { type AttrMap, type CarrierMap } from './types.js'
import { Configuration, type EndpointTuple } from './config.js'
import { ResourceAttributes } from './attributes.js'
import { AnacondaCommon } from "./common.js"
import { __noopASpan } from './signals-state.js'
import { SpanExporterShim } from './exporter_shims.js';
// ----- values -----
import { diag, DiagConsoleLogger, DiagLogLevel } from '@opentelemetry/api';
import * as otlpTraceHttpNS from '@opentelemetry/exporter-trace-otlp-http';
const { OTLPTraceExporter: OTLPTraceExporterHTTP } = otlpTraceHttpNS;
import * as otlpTraceGrpcNS from '@opentelemetry/exporter-trace-otlp-grpc';
const { OTLPTraceExporter: OTLPTraceExporterGRPC } = otlpTraceGrpcNS;
import * as sdkTraceBaseNS from '@opentelemetry/sdk-trace-base';
const { ConsoleSpanExporter, BatchSpanProcessor } = sdkTraceBaseNS;
import * as sdkTraceNodeNS from '@opentelemetry/sdk-trace-node';
const { NodeTracerProvider } = sdkTraceNodeNS;
import * as apiNS from '@opentelemetry/api';
const { SpanStatusCode, trace } = apiNS;
import grpc from '@grpc/grpc-js';
const { ChannelCredentials } = grpc;
// ----- types -----
import type { Span, Context } from '@opentelemetry/api';
import type {
SpanExporter as _SpanExporter,
ReadableSpan as _ReadableSpan,
BatchSpanProcessor as _BatchSpanProcessor,
} from '@opentelemetry/sdk-trace-base';
import type { NodeTracerProvider as _NodeTracerProvider } from '@opentelemetry/sdk-trace-node';
import type { ChannelCredentials as _ChannelCredentials } from '@grpc/grpc-js';
// ----- local type aliases (reuse runtime names) -----
type SpanExporter = _SpanExporter;
type ReadableSpan = _ReadableSpan;
type BatchSpanProcessor = _BatchSpanProcessor;
type NodeTracerProvider = _NodeTracerProvider;
type ChannelCredentials = _ChannelCredentials;
export class TraceArgs {
name: string = "";
attributes?: AttrMap = {};
carrier?: CarrierMap = {};
}
/**
* Represents a span in a tracing system, providing methods to record events, exceptions, errors, and attributes.
*
* @remarks
* This interface is typically used to instrument code for distributed tracing, allowing you to annotate spans with additional information.
*/
export interface ASpan {
/**
* Adds an event with the specified name and optional attributes.
*
* @param name - The name of the event to add.
* @param attributes - Optional key-value pairs providing additional information about the event.
*/
addEvent(name: string, attributes?: AttrMap): void;
/**
* Adds an exception to the current context.
*
* @param exception - The error object to be added as an exception.
*/
addException(exception: Error): void;
/**
* Sets the error status for the current signal.
*
* @param msg - Optional error message describing the reason for the error status.
*/
setErrorStatus(msg?: string): void;
/**
* Adds the specified attributes to the current object.
*
* @param attributes - A record containing key-value pairs of attributes to add.
*/
addAttributes(attributes: AttrMap): void;
}
export class ASpanImpl implements ASpan {
private span: Span
constructor(span: Span) {
this.span = span
this.span.setStatus({code: SpanStatusCode.OK, message: ""})
}
addEvent(name: string, attributes: AttrMap): void {
this.span.addEvent(name, attributes)
}
addException(exception: Error): void {
this.span.recordException(exception)
}
setErrorStatus(msg?: string): void {
this.span.setStatus({code: SpanStatusCode.ERROR, message: "The trace code block recorded an error."})
}
addAttributes(attributes: AttrMap): void {
for (let key of Object.keys(attributes)) {
this.span.setAttribute(key, attributes[key])
}
}
}
export class AnacondaTrace extends AnacondaCommon {
provider: NodeTracerProvider | null = null
private processor: BatchSpanProcessor | undefined
private depth: number = 0
parentExporter:SpanExporterShim | undefined
constructor(config: Configuration, attributes: ResourceAttributes) {
super(config, attributes)
this.setup()
}
async changeConnection(endpoint: URL | undefined, authToken: string | undefined, certFile: string | undefined): Promise<boolean> {
let [url, token, cert] = this.config.getTraceEndpointTuple()
if (endpoint !== url && endpoint !== undefined) {
this.config.traceEndpoint![0] = endpoint
}
if (authToken !== token) {
this.config.traceEndpoint![1] = authToken
}
if (certFile !== cert) {
this.config.traceEndpoint![2] = certFile
}
var [scheme, ep] = this.transformURL(this.config.traceEndpoint![0])
var creds: ChannelCredentials | undefined = this.readCredentials(scheme, this.config.traceEndpoint![2])
var headers = this.makeHeaders(scheme, authToken)
var exporter = this.makeExporter(scheme, ep, headers, creds)
if (exporter === undefined) {
return false
}
await this.processor?.forceFlush()
var oldExporter = await this.parentExporter?.swapExporter(exporter!)
await oldExporter?.shutdown()
return true
}
traceBlock(args: TraceArgs, block: (span: ASpan) => void): void {
if (!this.isValidName(args.name)) {
throw Error(`Trace name '${args.name}' is not a valid name (^[A-Za-z][A-Za-z_0-9]+$).`)
}
const tracer = trace.getTracer(this.serviceName, this.serviceVersion);
const context: Context = this.convertToContext(args.carrier!)
const span = tracer.startSpan(args.name, undefined, context)
this.depth++
for (let key of Object.keys(args.attributes ? args.attributes : {})) {
span.setAttribute(key, args.attributes![key])
}
block(new ASpanImpl(span))
span.end()
this.depth--
this.provider!.forceFlush()
}
async traceBlockAsync(args: TraceArgs, block: (span: ASpan) => Promise<void>): Promise<void> {
if (!this.isValidName(args.name)) {
throw Error(`Trace name '${args.name}' is not a valid name (^[A-Za-z][A-Za-z_0-9]+$).`)
}
const tracer = trace.getTracer(this.serviceName, this.serviceVersion);
const context: Context = this.convertToContext(args.carrier!)
const span = tracer.startSpan(args.name, undefined, context)
this.depth++
for (let key of Object.keys(args.attributes ? args.attributes : {})) {
span.setAttribute(key, args.attributes![key])
}
block(new ASpanImpl(span))
span.end()
this.depth--
await this.provider!.forceFlush()
}
private makeExporter(scheme: string, url: URL, httpHeaders: Record<string,string>,
creds?: ChannelCredentials): SpanExporter | undefined {
var exporter: SpanExporter | undefined = undefined
var urlStr = url.href
if (scheme === 'grpc:' || scheme === 'grpcs:') {
urlStr = `${url.hostname}:${url.port}`
exporter = new OTLPTraceExporterGRPC({
url: urlStr,
headers: httpHeaders,
credentials: creds
});
} else if (scheme === 'http:' || scheme === 'https:') {
exporter = new OTLPTraceExporterHTTP({
url: urlStr,
headers: httpHeaders
});
} else if (scheme === 'console:') {
exporter = new ConsoleSpanExporter()
} else if (scheme === 'devnull:') {
exporter = new NoopSpanExporter()
} else {
this.warn(`Received bad scheme for tracing: ${scheme}!`)
}
return exporter
}
makeBatchProcessor(scheme: string, url: URL, httpHeaders: Record<string,string>,
creds?: ChannelCredentials): BatchSpanProcessor | undefined {
var exporter = this.makeExporter(scheme, url, httpHeaders, creds)
if (exporter === undefined) {
return undefined
}
this.parentExporter = new SpanExporterShim(exporter!)
return new BatchSpanProcessor(this.parentExporter!)
}
readCredentials(scheme: string, certFile?: string): ChannelCredentials | undefined {
var creds: ChannelCredentials | undefined = undefined
if (certFile !== undefined && scheme === ("grpcs:")) {
const certContent = this.readCertFile(certFile)
if (certContent) {
creds = ChannelCredentials.createSsl(Buffer.from(certContent))
} else {
this.warn(`Failed to read certificate file: ${certFile}`)
}
}
return creds
}
private setup(): void {
Iif (this.config.useDebug) {
diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.DEBUG);
}
var [endpoint, authToken, certFile] = this.config.getTraceEndpointTuple()
const scheme = endpoint.protocol
const ep = new URL(endpoint.href)
this.debug(`Connecting to traces endpoint '${ep.href}'.`)
ep.protocol = ep.protocol.replace("grpcs:", "https:")
ep.protocol = ep.protocol.replace("grpc:", "http:")
var creds: ChannelCredentials | undefined = this.readCredentials(scheme, certFile)
const headers: Record<string,string> = authToken ? { 'Authorization': `Bearer ${authToken}` } : {}
const processor: BatchSpanProcessor | undefined = this.makeBatchProcessor(scheme, ep, headers, creds)
if (processor) {
this.processor = processor
this.provider = new NodeTracerProvider({
spanProcessors: [this.processor],
resource: this.resources
})
this.provider!.register()
} else {
}
}
private convertToContext(carrier: CarrierMap): Context {
return new LocalContext(carrier)
}
}
export class LocalContext implements Context {
map: Record<symbol, unknown> = {}
constructor(carrier: CarrierMap) {
for (let key of Object.keys(carrier ? carrier : {})) {
this.map[Symbol(key)] = carrier[key]
}
}
getValue(key: symbol): unknown {
return this.map[key]
}
setValue(key: symbol, value: unknown): Context {
this.map[key] = value
return this
}
deleteValue(key: symbol): Context {
delete this.map[key]
return this
}
}
export class NoopSpanExporter implements SpanExporter {
export(_spans: ReadableSpan[], resultCallback: (result: { code: number }) => void): void {
// Immediately report success without doing anything
resultCallback({ code: 0 });
}
shutdown(): Promise<void> {
return Promise.resolve();
}
forceFlush(): Promise<void> {
return Promise.resolve();
}
}
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