public void TestReadLatency()
{
//Insert a sample document to use for Read Latency Test
SampleDoc document = new SampleDoc
{
Name = "Scott Guthrie",
City = "Redmond",
PostalCode = "98052",
UserDefinedId = 0, //not used in this demo
Region = "Southeast Asia"
};
//insert the document
client.CreateDocumentAsync(collectionUri, document).GetAwaiter().GetResult();
string region = client.ConnectionPolicy.PreferredLocations[0].ToString();
Console.WriteLine();
Console.WriteLine($"Test for 100 reads against region: {region}\r\nPress any key to continue\r\n...");
Console.ReadKey(true);
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < 100; i++)
{
stopwatch.Start();
var sql = "SELECT TOP 1 * FROM c WHERE c.postalcode = '98052'";
var resp = client.CreateDocumentQuery(collectionUri, sql).ToList();
stopwatch.Stop();
Console.WriteLine($"Read operation {i} of 100. From region: {region}, elapsed time: {stopwatch.ElapsedMilliseconds} ms");
stopwatch.Reset();
}
}
public async Task TestWriteLatency()
{
string region = client.ConnectionPolicy.PreferredLocations[0].ToString();
Console.WriteLine();
Console.WriteLine($"Test for 100 writes against region: {region}\r\nPress any key to continue\r\n...");
Console.ReadKey(true);
SampleDoc document = new SampleDoc
{
Name = "Scott Guthrie",
City = "Redmond",
PostalCode = "98052",
UserDefinedId = 9, //not used in this demo
Region = region
};
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < 100; i++)
{
stopwatch.Start();
//insert the document
await client.CreateDocumentAsync(collectionUri, document);
stopwatch.Stop();
Console.WriteLine($"Write {i} of 100. Insert to region: {region}, elapsed time: {stopwatch.ElapsedMilliseconds} ms");
stopwatch.Reset();
}
}
private async Task <Document> UpdateDocument(DocumentClient client, Uri collectionUri, Document document)
{
//The region property for the committed document replicated to all regions.
//The update we will make will update that to be the region this document will be updated in.
string region = client.ConnectionPolicy.PreferredLocations[0].ToString();
//update the region property
document.SetPropertyValue("region", region);
SampleDoc doc = JsonConvert.DeserializeObject <SampleDoc>(document.ToString());
Console.WriteLine($"Updating document, Id: {doc.Id} from Region: {doc.Region} to Region: {region}");
try
{
return(await client.ReplaceDocumentAsync(document.SelfLink, document, new RequestOptions
{
AccessCondition = new AccessCondition
{
Type = AccessConditionType.IfMatch,
Condition = document.ETag
}
}));
}
catch (DocumentClientException ex)
{
if (ex.StatusCode == System.Net.HttpStatusCode.PreconditionFailed ||
ex.StatusCode == System.Net.HttpStatusCode.NotFound)
{
Console.WriteLine();
Console.WriteLine($"Attempted Update on Doc Id: {doc.Id} from Region: {doc.Region} unsuccessful as previous update already committed and replicated.");
//Lost synchronously or not replicated yet. No conflict is induced.
return(null);
}
throw;
}
}
private async Task <Document> InsertDocument(DocumentClient client, Uri collectionUri, int docId)
{
//Regional endpoint this document will be written to
string region = client.ConnectionPolicy.PreferredLocations[0].ToString();
//Create a random number between 0-10 for each document. This will be used by UDP stored procedure and LWW samples for conflict resolution.
int userdefid = RandomGen.Next(0, 10);
SampleDoc doc = new SampleDoc
{
Id = docId.ToString(),
Name = "Scott Guthrie",
City = "Redmond",
PostalCode = "98052",
UserDefinedId = userdefid,
Region = region
};
Console.WriteLine($"Id: {doc.Id}, Name: {doc.Name}, City: {doc.City}, PostalCode: {doc.PostalCode}, UserDefId: {doc.UserDefinedId}, Region: {doc.Region}");
try
{
return(await client.CreateDocumentAsync(collectionUri, doc));
}
catch (DocumentClientException ex)
{
if (ex.StatusCode == System.Net.HttpStatusCode.Conflict)
{
Console.WriteLine();
Console.WriteLine($"Attempted Insert for Doc Id: {doc.Id} from Region: {doc.Region} unsuccessful as previous insert already committed and replicated.");
//Conflict has already replicated so return null
return(null);
}
throw;
}
}