/**
* Catch-up subscription for one stream.
*
* @constructor
* @param {Connection} connection The connection to Event Store
* @param {string} streamId The stream name (only if subscribing to a single stream)
* @param {number} fromEventNumberExclusive Which event number to start after (if null, then from the beginning of the stream.)
* @param {ICredentials} userCredentials User credentials for the operations.
* @param {function} eventAppeared Callback for each event received
* @param {function} liveProcessingStarted Callback when read history phase finishes.
* @param {function} subscriptionDropped Callback when subscription drops or is dropped.
* @param {CatchUpSubscriptionSettings} settings Settings for this subscription.
*/
function EventStoreStreamCatchUpSubscription(connection, streamId, fromEventNumberExclusive, userCredentials, eventAppeared, liveProcessingStarted, subscriptionDropped, settings) {
// Base class constructor (JS-style).
EventStoreCatchUpSubscription.call(this, connection, streamId, userCredentials, eventAppeared, liveProcessingStarted, subscriptionDropped, settings);
ArgValidator.notNull(streamId, 'streamId');
this._lastProcessedEventNumber = ArgValidator.isNumber(fromEventNumberExclusive) ? fromEventNumberExclusive : -1;
this._nextReadEventNumber = ArgValidator.isNumber(fromEventNumberExclusive) ? fromEventNumberExclusive : 0;
}
/**
* Base class representing catch-up subscriptions.
*
* @constructor
* @param {Connection} connection The connection to Event Store
* @param {string} streamId The stream name (only if subscribing to a single stream)
* @param {ICredentials} userCredentials User credentials for the operations.
* @param {function} eventAppeared Callback for each event received
* @param {function} liveProcessingStarted Callback when read history phase finishes.
* @param {function} subscriptionDropped Callback when subscription drops or is dropped.
* @param {CatchUpSubscriptionSettings} settings Settings for this subscription.
*/
function EventStoreCatchUpSubscription(connection, streamId, userCredentials, eventAppeared, liveProcessingStarted, subscriptionDropped, settings) {
ArgValidator.notNull(connection, 'connection');
ArgValidator.notNull(eventAppeared, 'eventAppeared');
if (!settings) settings = new CatchUpSubscriptionSettings();
this._connection = connection;
this._streamId = streamId || "";
this._resolveLinkTos = settings.resolveLinkTos;
this._userCredentials = userCredentials;
this.readBatchSize = settings.readBatchSize;
this.maxPushQueueSize = settings.maxLiveQueueSize;
this.eventAppeared = eventAppeared;
this._liveProcessingStarted = liveProcessingStarted;
this._subscriptionDropped = subscriptionDropped;
this.debug = settings.debug;
this._shouldStop = false;
this._dropData = null;
this._liveQueue = [];
this._allowProcessing = false;
this._subscription = null;
}