public async Task StandByFeedIterator_WithMaxItemCount()
{
await this.CreateRandomItems(2, randomPartitionKey : true);
CosmosContainerCore itemsCore = (CosmosContainerCore)this.Container;
FeedIterator feedIterator = itemsCore.GetStandByFeedIterator(maxItemCount: 1, requestOptions: new ChangeFeedRequestOptions()
{
StartTime = DateTime.MinValue
});
while (feedIterator.HasMoreResults)
{
using (CosmosResponseMessage responseMessage =
await feedIterator.FetchNextSetAsync(this.cancellationToken))
{
if (responseMessage.IsSuccessStatusCode)
{
Collection <ToDoActivity> response = new CosmosJsonSerializerCore().FromStream <CosmosFeedResponseUtil <ToDoActivity> >(responseMessage.Content).Data;
if (response.Count > 0)
{
Assert.AreEqual(1, response.Count);
return;
}
}
}
}
Assert.Fail("Found no batch with size 1");
}
public async Task StandByFeedIterator_NoFetchNext()
{
var pkRanges = await this.Container.ClientContext.DocumentClient.ReadPartitionKeyRangeFeedAsync(this.Container.LinkUri);
int expected = 25;
int iterations = 0;
await this.CreateRandomItems(expected, randomPartitionKey : true);
CosmosContainerCore itemsCore = (CosmosContainerCore)this.Container;
string continuationToken = null;
int count = 0;
while (true)
{
ChangeFeedRequestOptions requestOptions = new ChangeFeedRequestOptions()
{
StartTime = DateTime.MinValue
};
FeedIterator feedIterator = itemsCore.GetStandByFeedIterator(continuationToken, requestOptions: requestOptions);
using (CosmosResponseMessage responseMessage =
await feedIterator.FetchNextSetAsync(this.cancellationToken))
{
continuationToken = responseMessage.Headers.Continuation;
if (responseMessage.IsSuccessStatusCode)
{
Collection <ToDoActivity> response = new CosmosJsonSerializerCore().FromStream <CosmosFeedResponseUtil <ToDoActivity> >(responseMessage.Content).Data;
count += response.Count;
}
}
if (count > expected)
{
Assert.Fail($"{count} does not equal {expected}");
}
if (count.Equals(expected))
{
break;
}
if (iterations++ > pkRanges.Count)
{
Assert.Fail("Feed does not contain all elements even after looping through PK ranges. Either the continuation is not moving forward or there is some state problem.");
}
}
}
public async Task StandByFeedIterator_WithInexistentRange()
{
// Add some random range, this will force the failure
List <CompositeContinuationToken> corruptedTokens = new List <CompositeContinuationToken>
{
new CompositeContinuationToken()
{
Range = new Documents.Routing.Range <string>("whatever", "random", true, false),
Token = "oops"
}
};
string corruptedTokenSerialized = JsonConvert.SerializeObject(corruptedTokens);
CosmosContainerCore itemsCore = (CosmosContainerCore)this.Container;
FeedIterator setIteratorNew =
itemsCore.GetStandByFeedIterator(corruptedTokenSerialized);
CosmosResponseMessage responseMessage =
await setIteratorNew.FetchNextSetAsync(this.cancellationToken);
Assert.Fail("Should have thrown.");
}
public async Task StandByFeedIterator()
{
int totalCount = 0;
string lastcontinuation = string.Empty;
int firstRunTotal = 25;
int batchSize = 25;
Documents.Routing.Range <string> previousRange = null;
Documents.Routing.Range <string> currentRange = null;
int pkRangesCount = (await this.Container.ClientContext.DocumentClient.ReadPartitionKeyRangeFeedAsync(this.Container.LinkUri)).Count;
int visitedPkRanges = 0;
await this.CreateRandomItems(batchSize, randomPartitionKey : true);
CosmosContainerCore itemsCore = (CosmosContainerCore)this.Container;
FeedIterator feedIterator = itemsCore.GetStandByFeedIterator(requestOptions: new ChangeFeedRequestOptions()
{
StartTime = DateTime.MinValue
});
while (feedIterator.HasMoreResults)
{
using (CosmosResponseMessage responseMessage =
await feedIterator.FetchNextSetAsync(this.cancellationToken))
{
lastcontinuation = responseMessage.Headers.Continuation;
List <CompositeContinuationToken> deserializedToken = JsonConvert.DeserializeObject <List <CompositeContinuationToken> >(lastcontinuation);
currentRange = deserializedToken[0].Range;
Assert.AreEqual(pkRangesCount, deserializedToken.Count);
if (responseMessage.IsSuccessStatusCode)
{
Collection <ToDoActivity> response = new CosmosJsonSerializerCore().FromStream <CosmosFeedResponseUtil <ToDoActivity> >(responseMessage.Content).Data;
totalCount += response.Count;
}
if (!currentRange.Equals(previousRange))
{
visitedPkRanges++;
}
if (visitedPkRanges == pkRangesCount && responseMessage.StatusCode == System.Net.HttpStatusCode.NotModified)
{
break;
}
previousRange = currentRange;
}
}
Assert.AreEqual(firstRunTotal, totalCount);
int expectedFinalCount = 50;
previousRange = null;
currentRange = null;
visitedPkRanges = 0;
// Insert another batch of 25 and use the last continuation token from the first cycle
await this.CreateRandomItems(batchSize, randomPartitionKey : true);
FeedIterator setIteratorNew =
itemsCore.GetStandByFeedIterator(lastcontinuation);
while (setIteratorNew.HasMoreResults)
{
using (CosmosResponseMessage responseMessage =
await setIteratorNew.FetchNextSetAsync(this.cancellationToken))
{
lastcontinuation = responseMessage.Headers.Continuation;
currentRange = JsonConvert.DeserializeObject <List <CompositeContinuationToken> >(lastcontinuation)[0].Range;
if (responseMessage.IsSuccessStatusCode)
{
Collection <ToDoActivity> response = new CosmosJsonSerializerCore().FromStream <CosmosFeedResponseUtil <ToDoActivity> >(responseMessage.Content).Data;
totalCount += response.Count;
}
if (!currentRange.Equals(previousRange))
{
visitedPkRanges++;
}
if (visitedPkRanges == pkRangesCount && responseMessage.StatusCode == System.Net.HttpStatusCode.NotModified)
{
break;
}
previousRange = currentRange;
}
}
Assert.AreEqual(expectedFinalCount, totalCount);
}