/
CollectorExporterBrowserBase.ts
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/
CollectorExporterBrowserBase.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 { CollectorExporterBase } from '../../CollectorExporterBase';
import { CollectorExporterConfigBase } from '../../types';
import * as collectorTypes from '../../types';
import { parseHeaders } from '../../util';
import { sendWithBeacon, sendWithXhr } from './util';
/**
* Collector Metric Exporter abstract base class
*/
export abstract class CollectorExporterBrowserBase<
ExportItem,
ServiceRequest
> extends CollectorExporterBase<
CollectorExporterConfigBase,
ExportItem,
ServiceRequest
> {
private _headers: Record<string, string>;
private _useXHR: boolean = false;
/**
* @param config
*/
constructor(config: CollectorExporterConfigBase = {}) {
super(config);
this._useXHR =
!!config.headers || typeof navigator.sendBeacon !== 'function';
if (this._useXHR) {
this._headers = parseHeaders(config.headers, this.logger);
} else {
this._headers = {};
}
}
onInit(): void {
window.addEventListener('unload', this.shutdown);
}
onShutdown(): void {
window.removeEventListener('unload', this.shutdown);
}
send(
items: ExportItem[],
onSuccess: () => void,
onError: (error: collectorTypes.CollectorExporterError) => void
) {
if (this._isShutdown) {
this.logger.debug('Shutdown already started. Cannot send objects');
return;
}
const serviceRequest = this.convert(items);
const body = JSON.stringify(serviceRequest);
const promise = new Promise<void>(resolve => {
const _onSuccess = (): void => {
onSuccess();
resolve();
};
const _onError = (error: collectorTypes.CollectorExporterError): void => {
onError(error);
resolve();
};
if (this._useXHR) {
sendWithXhr(
body,
this.url,
this._headers,
this.logger,
_onSuccess,
_onError
);
} else {
sendWithBeacon(body, this.url, this.logger, _onSuccess, _onError);
}
});
this._sendingPromises.push(promise);
const _onFinish = () => {
const index = this._sendingPromises.indexOf(promise);
this._sendingPromises.splice(index, 1);
};
promise.then(_onFinish);
}
}