redis-smq-common
Version:
Provides essential components and utilities shared across RedisSMQ packages.
57 lines • 1.31 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PowerSwitch = void 0;
class PowerSwitch {
constructor() {
this.isPowered = false;
this.pendingState = null;
}
switch(s) {
if (this.pendingState !== null) {
return false;
}
if (s === this.isPowered) {
return false;
}
this.pendingState = s;
return true;
}
isUp() {
return this.isPowered;
}
isDown() {
return !this.isPowered;
}
isGoingUp() {
return this.pendingState === true;
}
isGoingDown() {
return this.pendingState === false;
}
isRunning() {
return this.isUp() && this.pendingState === null;
}
goingUp() {
return this.switch(true);
}
goingDown() {
return this.switch(false);
}
commit() {
if (this.pendingState === null) {
return false;
}
this.isPowered = this.pendingState;
this.pendingState = null;
return true;
}
rollback() {
if (this.pendingState === null) {
return false;
}
this.pendingState = null;
return true;
}
}
exports.PowerSwitch = PowerSwitch;
//# sourceMappingURL=power-switch.js.map