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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { DiagConsoleLogger, DiagLogLevel, diag } from '@opentelemetry/api';
import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-grpc';
import { OTLPLogExporter } from '@opentelemetry/exporter-logs-otlp-grpc';
import { OTLPMetricExporter } from '@opentelemetry/exporter-metrics-otlp-grpc';
import { CompressionAlgorithm } from '@opentelemetry/otlp-exporter-base';
import { NodeSDK } from '@opentelemetry/sdk-node';
import { SemanticResourceAttributes } from '@opentelemetry/semantic-conventions';
import { Resource } from '@opentelemetry/resources';
import {
BatchSpanProcessor,
ConsoleSpanExporter,
} from '@opentelemetry/sdk-trace-node';
import {
BatchLogRecordProcessor,
ConsoleLogRecordExporter,
} from '@opentelemetry/sdk-logs';
import {
ConsoleMetricExporter,
PeriodicExportingMetricReader,
} from '@opentelemetry/sdk-metrics';
import { HttpInstrumentation } from '@opentelemetry/instrumentation-http';
import { Config } from '../config/config.js';
import { SERVICE_NAME } from './constants.js';
import { initializeMetrics } from './metrics.js';
import { ClearcutLogger } from './clearcut-logger/clearcut-logger.js';
// For troubleshooting, set the log level to DiagLogLevel.DEBUG
diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.INFO);
let sdk: NodeSDK | undefined;
let telemetryInitialized = false;
export function isTelemetrySdkInitialized(): boolean {
return telemetryInitialized;
}
function parseGrpcEndpoint(
otlpEndpointSetting: string | undefined,
): string | undefined {
if (!otlpEndpointSetting) {
return undefined;
}
// Trim leading/trailing quotes that might come from env variables
const trimmedEndpoint = otlpEndpointSetting.replace(/^["']|["']$/g, '');
try {
const url = new URL(trimmedEndpoint);
// OTLP gRPC exporters expect an endpoint in the format scheme://host:port
// The `origin` property provides this, stripping any path, query, or hash.
return url.origin;
} catch (error) {
diag.error('Invalid OTLP endpoint URL provided:', trimmedEndpoint, error);
return undefined;
}
}
export function initializeTelemetry(config: Config): void {
if (telemetryInitialized || !config.getTelemetryEnabled()) {
return;
}
const resource = new Resource({
[SemanticResourceAttributes.SERVICE_NAME]: SERVICE_NAME,
[SemanticResourceAttributes.SERVICE_VERSION]: process.version,
'session.id': config.getSessionId(),
});
const otlpEndpoint = config.getTelemetryOtlpEndpoint();
const grpcParsedEndpoint = parseGrpcEndpoint(otlpEndpoint);
const useOtlp = !!grpcParsedEndpoint;
const spanExporter = useOtlp
? new OTLPTraceExporter({
url: grpcParsedEndpoint,
compression: CompressionAlgorithm.GZIP,
})
: new ConsoleSpanExporter();
const logExporter = useOtlp
? new OTLPLogExporter({
url: grpcParsedEndpoint,
compression: CompressionAlgorithm.GZIP,
})
: new ConsoleLogRecordExporter();
const metricReader = useOtlp
? new PeriodicExportingMetricReader({
exporter: new OTLPMetricExporter({
url: grpcParsedEndpoint,
compression: CompressionAlgorithm.GZIP,
}),
exportIntervalMillis: 10000,
})
: new PeriodicExportingMetricReader({
exporter: new ConsoleMetricExporter(),
exportIntervalMillis: 10000,
});
sdk = new NodeSDK({
resource,
spanProcessors: [new BatchSpanProcessor(spanExporter)],
logRecordProcessor: new BatchLogRecordProcessor(logExporter),
metricReader,
instrumentations: [new HttpInstrumentation()],
});
try {
sdk.start();
console.log('OpenTelemetry SDK started successfully.');
telemetryInitialized = true;
initializeMetrics(config);
} catch (error) {
console.error('Error starting OpenTelemetry SDK:', error);
}
process.on('SIGTERM', shutdownTelemetry);
process.on('SIGINT', shutdownTelemetry);
}
export async function shutdownTelemetry(): Promise<void> {
if (!telemetryInitialized || !sdk) {
return;
}
try {
ClearcutLogger.getInstance()?.shutdown();
await sdk.shutdown();
console.log('OpenTelemetry SDK shut down successfully.');
} catch (error) {
console.error('Error shutting down SDK:', error);
} finally {
telemetryInitialized = false;
}
}
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