You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.4 KiB
52 lines
1.4 KiB
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
const stream_1 = require("stream");
|
|
/**
|
|
* Convenient class to convert the process of scaning keys to a readable stream.
|
|
*
|
|
* @export
|
|
* @class ScanStream
|
|
* @extends {Readable}
|
|
*/
|
|
class ScanStream extends stream_1.Readable {
|
|
constructor(opt) {
|
|
super(opt);
|
|
this.opt = opt;
|
|
this._redisCursor = "0";
|
|
this._redisDrained = false;
|
|
}
|
|
_read() {
|
|
if (this._redisDrained) {
|
|
this.push(null);
|
|
return;
|
|
}
|
|
const args = [this._redisCursor];
|
|
if (this.opt.key) {
|
|
args.unshift(this.opt.key);
|
|
}
|
|
if (this.opt.match) {
|
|
args.push("MATCH", this.opt.match);
|
|
}
|
|
if (this.opt.type) {
|
|
args.push("TYPE", this.opt.type);
|
|
}
|
|
if (this.opt.count) {
|
|
args.push("COUNT", String(this.opt.count));
|
|
}
|
|
this.opt.redis[this.opt.command](args, (err, res) => {
|
|
if (err) {
|
|
this.emit("error", err);
|
|
return;
|
|
}
|
|
this._redisCursor = res[0] instanceof Buffer ? res[0].toString() : res[0];
|
|
if (this._redisCursor === "0") {
|
|
this._redisDrained = true;
|
|
}
|
|
this.push(res[1]);
|
|
});
|
|
}
|
|
close() {
|
|
this._redisDrained = true;
|
|
}
|
|
}
|
|
exports.default = ScanStream;
|
|
|