@aws-amplify/pubsub
Version:
Pubsub category of aws-amplify
73 lines • 3.15 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var constants_1 = require("../Providers/constants");
var ReconnectEvent;
(function (ReconnectEvent) {
ReconnectEvent["START_RECONNECT"] = "START_RECONNECT";
ReconnectEvent["HALT_RECONNECT"] = "HALT_RECONNECT";
})(ReconnectEvent = exports.ReconnectEvent || (exports.ReconnectEvent = {}));
/**
* Captures the reconnect event logic used to determine when to reconnect to PubSub providers.
* Reconnnect attempts are delayed by 5 seconds to let the interface settle.
* Attempting to reconnect only once creates unrecoverable states when the network state isn't
* supported by the browser, so this keeps retrying every minute until halted.
*/
var ReconnectionMonitor = /** @class */ (function () {
function ReconnectionMonitor() {
this.reconnectObservers = [];
}
/**
* Add reconnect observer to the list of observers to alert on reconnect
*/
ReconnectionMonitor.prototype.addObserver = function (reconnectObserver) {
this.reconnectObservers.push(reconnectObserver);
};
/**
* Given a reconnect event, start the appropriate behavior
*/
ReconnectionMonitor.prototype.record = function (event) {
var _this = this;
if (event === ReconnectEvent.START_RECONNECT) {
// If the reconnection hasn't been started
if (this.reconnectSetTimeoutId === undefined &&
this.reconnectIntervalId === undefined) {
this.reconnectSetTimeoutId = setTimeout(function () {
// Reconnect now
_this._triggerReconnect();
// Retry reconnect every periodically until it works
_this.reconnectIntervalId = setInterval(function () {
_this._triggerReconnect();
}, constants_1.RECONNECT_INTERVAL);
}, constants_1.RECONNECT_DELAY);
}
}
if (event === ReconnectEvent.HALT_RECONNECT) {
if (this.reconnectIntervalId) {
clearInterval(this.reconnectIntervalId);
this.reconnectIntervalId = undefined;
}
if (this.reconnectSetTimeoutId) {
clearTimeout(this.reconnectSetTimeoutId);
this.reconnectSetTimeoutId = undefined;
}
}
};
/**
* Complete all reconnect observers
*/
ReconnectionMonitor.prototype.close = function () {
this.reconnectObservers.forEach(function (reconnectObserver) {
var _a;
(_a = reconnectObserver.complete) === null || _a === void 0 ? void 0 : _a.call(reconnectObserver);
});
};
ReconnectionMonitor.prototype._triggerReconnect = function () {
this.reconnectObservers.forEach(function (reconnectObserver) {
var _a;
(_a = reconnectObserver.next) === null || _a === void 0 ? void 0 : _a.call(reconnectObserver);
});
};
return ReconnectionMonitor;
}());
exports.ReconnectionMonitor = ReconnectionMonitor;
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