@arcgis/core/layers/support/rasterDatasets/EphemeralBlockCache.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/*
All material copyright ESRI, All Rights Reserved, unless otherwise specified.
See https://js.arcgis.com/4.33/esri/copyright.txt for details.
*/
class t{constructor(t=15e3,e=5e3){this._timer=null,this._cachedBlocks=new Map,this._size=-1,this._duration=t,this._interval=Math.min(t,e)}decreaseRefCount(t,e){const s=t+"/"+e,r=this._cachedBlocks;if(r.has(s)){const t=r.get(s);return t.refCount--,t.refCount<=0&&(r.delete(s),t.controller&&t.controller.abort()),t.refCount}return 0}getBlock(t,e){const s=t+"/"+e,r=this._cachedBlocks;if(r.has(s)){const t=r.get(s);return t.ts=Date.now(),t.refCount++,r.delete(s),r.set(s,t),t.block}return null}putBlock(t,e,s,r){const i=this._cachedBlocks,c=t+"/"+e;if(i.has(c)){const t=i.get(c);t.ts=Date.now(),t.refCount++}else i.set(c,{block:s,ts:Date.now(),refCount:1,controller:r});this._trim(),this._updateTimer()}deleteBlock(t,e){const s=this._cachedBlocks,r=t+"/"+e;s.has(r)&&s.delete(r)}updateMaxSize(t){this._size=t,this._trim()}empty(){this._cachedBlocks.clear(),this._clearTimer()}getCurrentSize(){return this._cachedBlocks.size}_updateTimer(){if(null!=this._timer)return;const t=this._cachedBlocks;this._timer=setInterval((()=>{const e=Array.from(t),s=Date.now();for(let r=0;r<e.length&&e[r][1].ts<=s-this._duration;r++)t.delete(e[r][0]);0===t.size&&this._clearTimer()}),this._interval)}_trim(){const t=this._cachedBlocks;if(-1===this._size||this._size>=t.size)return;const e=Array.from(t);for(let s=0;s<e.length-this._size;s++)t.delete(e[s][0])}_clearTimer(){null!=this._timer&&(clearInterval(this._timer),this._timer=null)}}export{t as default};