private void PopulateListUpdatesAsync(string datasetName, long lastSyncCount, List<Record> records, string nextToken, AmazonCognitoSyncCallback<DatasetUpdates> callback, AsyncOptions options)
{
ListRecordsRequest request = new ListRecordsRequest();
request.IdentityPoolId = identityPoolId;
request.IdentityId = this.GetCurrentIdentityId();
request.DatasetName = datasetName;
request.LastSyncCount = lastSyncCount;
// mark it large enough to reduce # of requests
request.MaxResults = 1024;
request.NextToken = nextToken;
client.ListRecordsAsync(request, (responseObj) =>
{
ListRecordsResponse res = responseObj.Response;
Exception ex = responseObj.Exception;
object obj = responseObj.state;
if (ex != null)
{
InternalSDKUtils.AsyncExecutor(() => callback(new AmazonCognitoSyncResult<DatasetUpdates>(null, ex, obj)), options); ;
}
else
{
ListRecordsResponse listRecordsResponse = res;
foreach (Amazon.CognitoSync.Model.Record remoteRecord in listRecordsResponse.Records)
{
//builder.addRecord(modelToRecord(remoteRecord));
records.Add(this.ModelToRecord(remoteRecord));
}
if (listRecordsResponse.NextToken == null)
{
DatasetUpdates updates = new DatasetUpdates(
datasetName,
records,
listRecordsResponse.DatasetSyncCount,
listRecordsResponse.SyncSessionToken,
listRecordsResponse.DatasetExists,
listRecordsResponse.DatasetDeletedAfterRequestedSyncCount,
listRecordsResponse.MergedDatasetNames
);
InternalSDKUtils.AsyncExecutor(() => callback(new AmazonCognitoSyncResult<DatasetUpdates>(updates, ex, obj)), options);
return;
}
// update last evaluated key
nextToken = listRecordsResponse.NextToken;
// emulating the while loop
PopulateListUpdatesAsync(datasetName, lastSyncCount, records, nextToken, callback, new AsyncOptions() { ExecuteCallbackOnMainThread = false, State = obj });
}
},
options);
}
private async Task<DatasetUpdates> PopulateListUpdatesAsync(string datasetName, long lastSyncCount, List<Record> records, string nextToken, CancellationToken cancellationToken)
{
ListRecordsRequest request = new ListRecordsRequest();
request.IdentityPoolId = identityPoolId;
request.IdentityId = this.GetCurrentIdentityId();
request.DatasetName = datasetName;
request.LastSyncCount = lastSyncCount;
// mark it large enough to reduce # of requests
request.MaxResults = 1024;
request.NextToken = nextToken;
ListRecordsResponse listRecordsResponse = await client.ListRecordsAsync(request, cancellationToken).ConfigureAwait(false);
foreach (Amazon.CognitoSync.Model.Record remoteRecord in listRecordsResponse.Records)
{
records.Add(ModelToRecord(remoteRecord));
}
// update last evaluated key
nextToken = listRecordsResponse.NextToken;
if (nextToken != null)
await PopulateListUpdatesAsync(datasetName, lastSyncCount, records, nextToken, cancellationToken).ConfigureAwait(false);
DatasetUpdates updates = new DatasetUpdates(
datasetName,
records,
listRecordsResponse.DatasetSyncCount,
listRecordsResponse.SyncSessionToken,
listRecordsResponse.DatasetExists,
listRecordsResponse.DatasetDeletedAfterRequestedSyncCount,
listRecordsResponse.MergedDatasetNames
);
return updates;
}
