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handle eventAppeared callback returning Promise

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This commit is contained in:
Nicolas Dextraze
2017-07-16 17:11:54 -07:00
parent 0b968c40e8
commit 7c94e26055
12 changed files with 269 additions and 102 deletions
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15
src/eventStoreAllCatchUpSubscription.js
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@ -24,14 +24,10 @@ EventStoreAllCatchUpSubscription.prototype._readEventsTill = function(
var self = this;
function processEvents(events, index) {
index = index || 0;
if (index >= events.length) return Promise.resolve();
if (events[index].originalPosition === null) throw new Error("Subscription event came up with no OriginalPosition.");
return new Promise(function(resolve, reject) {
self._tryProcess(events[index]);
resolve();
})
return self._tryProcess(events[index])
.then(function() {
return processEvents(events, index + 1);
});
@ -40,13 +36,12 @@ EventStoreAllCatchUpSubscription.prototype._readEventsTill = function(
function readNext() {
return connection.readAllEventsForward(self._nextReadPosition, self.readBatchSize, resolveLinkTos, userCredentials)
.then(function(slice) {
return processEvents(slice.events)
return processEvents(slice.events, 0)
.then(function() {
self._nextReadPosition = slice.nextPosition;
var done = lastCommitPosition === null
return (lastCommitPosition === null)
? slice.isEndOfStream
: slice.nextPosition.compareTo(new results.Position(lastCommitPosition, lastCommitPosition)) >= 0;
return Promise.resolve(done);
});
})
.then(function(done) {
@ -67,9 +62,10 @@ EventStoreAllCatchUpSubscription.prototype._readEventsTill = function(
EventStoreAllCatchUpSubscription.prototype._tryProcess = function(e) {
var processed = false;
var promise;
if (e.originalPosition.compareTo(this._lastProcessedPosition) > 0)
{
this._eventAppeared(this, e);
promise = this._eventAppeared(this, e);
this._lastProcessedPosition = e.originalPosition;
processed = true;
}
@ -77,6 +73,7 @@ EventStoreAllCatchUpSubscription.prototype._tryProcess = function(e) {
this._log.debug("Catch-up Subscription to %s: %s event (%s, %d, %s @ %s).",
this.streamId || '<all>', processed ? "processed" : "skipping",
e.originalEvent.eventStreamId, e.originalEvent.eventNumber, e.originalEvent.eventType, e.originalPosition);
return (promise && promise.then) ? promise : Promise.resolve();
};
module.exports = EventStoreAllCatchUpSubscription;