@jbrowse/core/esm/data_adapters/dataAdapterCache.js

JBrowse 2 core libraries used by plugins

import { adapterConfigCacheKey } from "./util.js";
let adapterCache = {};
async function getAdapterPre(pluginManager, sessionId, adapterConfigSnapshot) {
    const adapterType = adapterConfigSnapshot?.type;
    if (!adapterType) {
        throw new Error(`could not determine adapter type from adapter config snapshot ${JSON.stringify(adapterConfigSnapshot)}`);
    }
    const dataAdapterType = pluginManager.getAdapterType(adapterType);
    if (!dataAdapterType) {
        throw new Error(`unknown data adapter type ${adapterType}`);
    }
    const adapterConfig = dataAdapterType.configSchema.create(adapterConfigSnapshot, { pluginManager });
    const getSubAdapter = getAdapter.bind(null, pluginManager, sessionId);
    const CLASS = await dataAdapterType.getAdapterClass();
    const dataAdapter = new CLASS(adapterConfig, getSubAdapter, pluginManager);
    return {
        dataAdapter,
        sessionIds: new Set([sessionId]),
    };
}
export async function getAdapter(pluginManager, sessionId, adapterConfigSnapshot) {
    const cacheKey = adapterConfigCacheKey(adapterConfigSnapshot);
    adapterCache[cacheKey] ??= getAdapterPre(pluginManager, sessionId, adapterConfigSnapshot);
    const ret = await adapterCache[cacheKey];
    ret.sessionIds.add(sessionId);
    return ret;
}
export async function freeAdapterResources(args) {
    const specKeys = Object.keys(args);
    if (specKeys.length === 1 && specKeys[0] === 'sessionId') {
        const { sessionId } = args;
        for (const [cacheKey, cacheEntryP] of Object.entries(adapterCache)) {
            const cacheEntry = await cacheEntryP;
            cacheEntry.sessionIds.delete(sessionId);
            if (cacheEntry.sessionIds.size === 0) {
                delete adapterCache[cacheKey];
            }
        }
    }
    else {
        for (const cacheEntryP of Object.values(adapterCache)) {
            const cacheEntry = await cacheEntryP;
            const regions = args.regions || (args.region ? [args.region] : []);
            for (const region of regions) {
                if (region.refName !== undefined) {
                    cacheEntry.dataAdapter.freeResources(region);
                }
            }
        }
    }
}
export function clearAdapterCache() {
    adapterCache = {};
}