molstar
Version:
A comprehensive macromolecular library.
81 lines (80 loc) • 2.62 kB
JavaScript
/**
* Copyright (c) 2018 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author David Sehnal <david.sehnal@gmail.com>
*/
import { ConsoleLogger } from '../../../mol-util/console-logger';
import { LinkedList } from '../../../mol-data/generic';
import { ModelServerConfig as ServerConfig } from '../config';
export class Cache {
clearTimeout(e) {
if (typeof e.value.timeoutId !== 'undefined') {
clearTimeout(e.value.timeoutId);
e.value.timeoutId = void 0;
}
}
dispose(e) {
this.clearTimeout(e);
if (e.inList) {
this.entries.remove(e);
this.approximateSize -= e.value.approximateSize;
}
this.entryMap.delete(e.value.key);
}
refresh(e) {
this.clearTimeout(e);
e.value.timeoutId = setTimeout(() => this.expireNode(e), ServerConfig.cacheEntryTimeoutMs);
this.entries.remove(e);
this.entries.addFirst(e.value);
}
expireNode(e, notify = true) {
if (notify)
ConsoleLogger.log('Cache', `${e.value.key} expired.`);
this.dispose(e);
}
expireAll() {
for (let e = this.entries.first; e; e = e.next)
this.expireNode(e, false);
}
expire(key) {
const entry = this.entryMap.get(key);
if (!entry)
return;
this.expireNode(entry);
}
add(item) {
const key = this.keyGetter(item);
const approximateSize = this.sizeGetter(item);
if (this.entryMap.has(key))
this.dispose(this.entryMap.get(key));
if (ServerConfig.cacheMaxSizeInBytes < this.approximateSize + approximateSize) {
if (this.entries.last)
this.dispose(this.entries.last);
}
this.approximateSize += approximateSize;
const entry = { key, approximateSize, timeoutId: void 0, item };
const e = this.entries.addFirst(entry);
this.entryMap.set(key, e);
this.refresh(e);
ConsoleLogger.log('Cache', `${key} added.`);
return item;
}
has(key) {
return this.entryMap.has(key);
}
get(key) {
if (!this.entryMap.has(key))
return void 0;
const e = this.entryMap.get(key);
this.refresh(e);
ConsoleLogger.log('Cache', `${key} accessed.`);
return e.value.item;
}
constructor(keyGetter, sizeGetter) {
this.keyGetter = keyGetter;
this.sizeGetter = sizeGetter;
this.entries = LinkedList();
this.entryMap = new Map();
this.approximateSize = 0;
}
}