@pinecone-database/pinecone
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This is the official Node.js SDK for [Pinecone](https://www.pinecone.io), written in TypeScript.
62 lines • 2.83 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.IndexHostSingleton = void 0;
const control_1 = require("../control");
const errors_1 = require("../errors");
const utils_1 = require("../utils");
// We use describeIndex to retrieve the data plane url (host) for a given API key
// and index. We only ever want to call describeIndex a maximum of once per API key
// and index, so we cache them in a singleton for reuse.
exports.IndexHostSingleton = (function () {
const hostUrls = {}; // map of apiKey-indexName to hostUrl
const _describeIndex = async (config, indexName) => {
const indexOperationsApi = (0, control_1.indexOperationsBuilder)(config);
const describeResponse = await (0, control_1.describeIndex)(indexOperationsApi)(indexName);
const host = describeResponse.host;
if (!host) {
// Generally, middleware will handle most errors from the call itself such as index not found, etc
// However, we need to explicitly handle the optionality of status.host
throw new errors_1.PineconeUnableToResolveHostError('The HTTP call succeeded but the host URL could not be resolved. Please make sure the index exists and is in a ready state.');
}
else {
return host;
}
};
const _key = (config, indexName) => `${config.apiKey}-${indexName}`;
const singleton = {
getHostUrl: async (config, indexName) => {
const cacheKey = _key(config, indexName);
if (cacheKey in hostUrls) {
return hostUrls[cacheKey];
}
else {
const hostUrl = await _describeIndex(config, indexName);
singleton._set(config, indexName, hostUrl);
if (!hostUrls[cacheKey]) {
throw new errors_1.PineconeUnableToResolveHostError(`Could not get host for index: ${indexName}. Call describeIndex('${indexName}') to check the current status.`);
}
return hostUrls[cacheKey];
}
},
_reset: () => {
for (const key of Object.keys(hostUrls)) {
delete hostUrls[key];
}
},
_set: (config, indexName, hostUrl) => {
const normalizedHostUrl = (0, utils_1.normalizeUrl)(hostUrl);
// prevent adding an empty hostUrl to the cache
if (!normalizedHostUrl) {
return;
}
const cacheKey = _key(config, indexName);
hostUrls[cacheKey] = normalizedHostUrl;
},
_delete: (config, indexName) => {
const cacheKey = _key(config, indexName);
delete hostUrls[cacheKey];
},
};
return singleton;
})();
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