/
headerUtils.ts
68 lines (58 loc) · 2.16 KB
/
headerUtils.ts
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import { Constants } from "../common";
import { QueryMetrics } from "../queryMetrics";
export interface CosmosHeaders {
[key: string]: any;
}
/** @hidden */
// TODO: docs
export function getRequestChargeIfAny(headers: CosmosHeaders | number): number {
if (typeof headers === "number") {
return headers;
} else if (typeof headers === "string") {
return parseFloat(headers);
}
if (headers) {
const rc = headers[Constants.HttpHeaders.RequestCharge];
if (rc) {
return parseFloat(rc as string);
} else {
return 0;
}
} else {
return 0;
}
}
export function getInitialHeader(): CosmosHeaders {
const headers: CosmosHeaders = {};
headers[Constants.HttpHeaders.RequestCharge] = 0;
headers[Constants.HttpHeaders.QueryMetrics] = {};
return headers;
}
// TODO: The name of this method isn't very accurate to what it does
export function mergeHeaders(headers: CosmosHeaders, toBeMergedHeaders: CosmosHeaders) {
if (headers[Constants.HttpHeaders.RequestCharge] === undefined) {
headers[Constants.HttpHeaders.RequestCharge] = 0;
}
if (headers[Constants.HttpHeaders.QueryMetrics] === undefined) {
headers[Constants.HttpHeaders.QueryMetrics] = QueryMetrics.zero;
}
if (!toBeMergedHeaders) {
return;
}
headers[Constants.HttpHeaders.RequestCharge] += getRequestChargeIfAny(toBeMergedHeaders);
if (toBeMergedHeaders[Constants.HttpHeaders.IsRUPerMinuteUsed]) {
headers[Constants.HttpHeaders.IsRUPerMinuteUsed] = toBeMergedHeaders[Constants.HttpHeaders.IsRUPerMinuteUsed];
}
if (Constants.HttpHeaders.QueryMetrics in toBeMergedHeaders) {
const headerQueryMetrics = headers[Constants.HttpHeaders.QueryMetrics];
const toBeMergedHeaderQueryMetrics = toBeMergedHeaders[Constants.HttpHeaders.QueryMetrics];
for (const partitionId in toBeMergedHeaderQueryMetrics) {
if (partitionId in headerQueryMetrics) {
const combinedQueryMetrics = headerQueryMetrics[partitionId].add([toBeMergedHeaderQueryMetrics[partitionId]]);
headerQueryMetrics[partitionId] = combinedQueryMetrics;
} else {
headerQueryMetrics[partitionId] = toBeMergedHeaderQueryMetrics[partitionId];
}
}
}
}