/
CollectorExporterNodeBase.ts
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/
CollectorExporterNodeBase.ts
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/*
* 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 {
CollectorExporterBase,
collectorTypes,
} from '@opentelemetry/exporter-collector';
import type { Metadata } from 'grpc';
import {
CollectorExporterConfigNode,
GRPCQueueItem,
ServiceClientType,
} from './types';
import { ServiceClient } from './types';
/**
* Collector Metric Exporter abstract base class
*/
export abstract class CollectorExporterNodeBase<
ExportItem,
ServiceRequest
> extends CollectorExporterBase<
CollectorExporterConfigNode,
ExportItem,
ServiceRequest
> {
grpcQueue: GRPCQueueItem<ExportItem>[] = [];
metadata?: Metadata;
serviceClient?: ServiceClient = undefined;
private _send!: Function;
constructor(config: CollectorExporterConfigNode = {}) {
super(config);
if (config.headers) {
diag.warn('Headers cannot be set when using grpc');
}
this.metadata = config.metadata;
}
private _sendPromise(
objects: ExportItem[],
onSuccess: () => void,
onError: (error: collectorTypes.CollectorExporterError) => void
): void {
const promise = new Promise<void>((resolve, reject) => {
this._send(this, objects, resolve, reject);
})
.then(onSuccess)
.catch(onError);
this._sendingPromises.push(promise);
promise.finally(() => {
const index = this._sendingPromises.indexOf(promise);
this._sendingPromises.splice(index, 1);
});
}
onInit(config: CollectorExporterConfigNode): void {
this._isShutdown = false;
// defer to next tick and lazy load to avoid loading grpc too early
// and making this impossible to be instrumented
setImmediate(() => {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const { onInit } = require('./util');
onInit(this, config);
});
}
send(
objects: ExportItem[],
onSuccess: () => void,
onError: (error: collectorTypes.CollectorExporterError) => void
): void {
if (this._isShutdown) {
diag.debug('Shutdown already started. Cannot send objects');
return;
}
if (!this._send) {
// defer to next tick and lazy load to avoid loading grpc too early
// and making this impossible to be instrumented
setImmediate(() => {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const { send } = require('./util');
this._send = send;
this._sendPromise(objects, onSuccess, onError);
});
} else {
this._sendPromise(objects, onSuccess, onError);
}
}
onShutdown(): void {
this._isShutdown = true;
if (this.serviceClient) {
this.serviceClient.close();
}
}
abstract getServiceProtoPath(): string;
abstract getServiceClientType(): ServiceClientType;
}