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import { Span as SpanImpl, Transaction as TransactionImpl } from '../utils/tracing';
import { logDebug } from '../utils/logger';
export class TracingManager {
private config: LightConfig;
private _client?: LightClient;
private currentTransaction: Transaction | null = null;
private spanStack: Span[] = [];
private dsnPublicKey?: string;
constructor(config: LightConfig, client?: LightClient, dsnPublicKey?: string) {
this.config = config;
this._client = client;
this.dsnPublicKey = dsnPublicKey;
}
updateConfig(config: LightConfig): void {
this.config = config;
if (this.currentTransaction) {
const txImpl = this.currentTransaction as unknown as TransactionImpl;
txImpl.setUserBaggage(config.user?.id, (config.user as { segment?: string } | undefined)?.segment);
}
}
private shouldSample(context: TransactionContext, parentSampled?: boolean): boolean {
const sampler = this.config.tracesSampler;
if (sampler) {
const samplingContext: SamplingContext = {
...context,
parentSampled,
};
const result = sampler(samplingContext);
if (typeof result === 'boolean') {
return result;
}
const clampedRate = Math.max(0, Math.min(1, result));
if (clampedRate === 0) return false;
if (clampedRate === 1) return true;
return Math.random() < clampedRate;
}
const rate = this.config.tracesSampleRate ?? 0;
if (rate >= 1) return true;
if (rate <= 0) return false;
return Math.random() < rate;
}
startTransaction(context: TransactionContext): Transaction | null {
const parentTx = this.currentTransaction;
const parentSampled = parentTx ? parentTx.sampled : undefined;
const sampled = context.sampled ?? this.shouldSample(context, parentSampled);
const transaction = new TransactionImpl(
{
...context,
sampled,
},
this._client,
this.dsnPublicKey,
this.config.release,
this.config.environment
) as unknown as Transaction;
this.currentTransaction = transaction;
this.spanStack = [transaction];
logDebug('TracingManager', 'Transaction started', {
name: transaction.name,
traceId: transaction.traceId,
spanId: transaction.spanId,
sampled,
op: transaction.op,
});
return transaction;
}
getCurrentTransaction(): Transaction | null {
return this.currentTransaction;
}
setCurrentTransaction(transaction: Transaction | null): void {
this.currentTransaction = transaction;
if (!transaction) {
this.spanStack = [];
} else {
this.spanStack = [transaction];
}
}
getCurrentSpan(): Span | null {
return this.spanStack.length > 0 ? this.spanStack[this.spanStack.length - 1] : null;
}
setCurrentSpan(span: Span | null): void {
if (span === null) {
if (this.spanStack.length > 1) {
this.spanStack.pop();
}
} else {
this.spanStack.push(span);
}
}
startSpan(context: SpanContext): Span | null {
const parentSpan = this.getCurrentSpan();
if (!parentSpan && !context.traceId) {
logDebug('TracingManager', 'startSpan skipped: no active span and no traceId');
return null;
}
let span: Span;
if (parentSpan) {
span = (parentSpan as SpanImpl).startChild(context);
} else {
span = new SpanImpl({
...context,
parentSpanId: context.parentSpanId,
}) as unknown as Span;
if (this.currentTransaction) {
if (this.currentTransaction.sampled !== false) {
(this.currentTransaction as unknown as TransactionImpl)._addSpan(span as unknown as SpanImpl);
}
(span as SpanImpl & { transaction: Transaction }).transaction = this.currentTransaction;
}
}
this.spanStack.push(span);
logDebug('TracingManager', 'Span started', {
op: span.op,
description: span.description,
spanId: span.spanId,
parentSpanId: span.parentSpanId,
stackDepth: this.spanStack.length,
});
return span;
}
onSpanFinished(span: Span): void {
const idx = this.spanStack.lastIndexOf(span);
if (idx !== -1) {
this.spanStack.splice(idx, 1);
}
if (this.spanStack.length === 0 && this.currentTransaction) {
this.spanStack = [this.currentTransaction];
}
logDebug('TracingManager', 'Span finished', {
op: span.op,
description: span.description,
spanId: span.spanId,
stackDepth: this.spanStack.length,
});
}
onTransactionFinished(transaction: Transaction): void {
if (this.currentTransaction === transaction) {
this.currentTransaction = null;
this.spanStack = [];
}
logDebug('TracingManager', 'Transaction finished', {
name: transaction.name,
traceId: transaction.traceId,
spanCount: transaction.spans.length,
sampled: transaction.sampled,
});
}
finishSpan(span: Span): void {
span.finish();
}
finishTransaction(transaction: Transaction): void {
transaction.finish();
}
destroy(): void {
if (this.currentTransaction) {
try {
this.currentTransaction.setStatus('aborted');
this.currentTransaction.finish();
} catch {
// ignore
}
}
this.currentTransaction = null;
this.spanStack = [];
}
}
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