private static async Task LoadData(Benchmark benchmark)
{
try
{
List <SampleCustomer> customers = SampleCustomer.GenerateCustomers(benchmark.partitionKeyValue, 100);
//Stored Proc for bulk inserting data
string scriptId = "BulkImport";
string body = File.ReadAllText(@"spBulkUpload.js");
StoredProcedureResponse sproc = await benchmark.container.Scripts.CreateStoredProcedureAsync(new StoredProcedureProperties(scriptId, body));
int inserted = 0;
while (inserted < customers.Count)
{
dynamic[] args = new dynamic[] { customers.Skip(inserted) };
StoredProcedureExecuteResponse <int> result = await benchmark.container.Scripts.ExecuteStoredProcedureAsync <int>(scriptId, new PartitionKey(benchmark.partitionKeyValue), args);
inserted += result.Resource;
Console.WriteLine($"Inserted {inserted} items.");
}
}
catch (Exception e)
{
Console.WriteLine(e.Message + "\nPress any key to continue");
Console.ReadKey();
}
}
private async Task VerifyItemReplicated(ConflictGenerator conflict, SampleCustomer customer)
{
bool notifyOnce = false;
foreach (ReplicaRegion region in conflict.replicaRegions)
{
Container container = region.container;
bool isReplicated = false;
while (!isReplicated)
{
try
{ //Issue a read for an item that doesn't exist to warm the connection
await container.ReadItemAsync <SampleCustomer>(customer.Id, new PartitionKey(customer.MyPartitionKey));
isReplicated = true;
if (notifyOnce)
{
Console.WriteLine("Item is replicated");
}
}
catch
{
if (!notifyOnce)
{
Console.WriteLine("Waiting for item to replicate in all regions");
notifyOnce = true;
}
//swallow any errors and wait 250ms to retry
await Task.Delay(250);
}
}
}
}
public static async Task WriteBenchmark(Benchmark benchmark)
{
//Verify the benchmark is setup
await InitializeBenchmark(benchmark);
//Customers to insert
List <SampleCustomer> customers = SampleCustomer.GenerateCustomers(benchmark.partitionKeyValue, 100);
//Console.WriteLine($"\nTest {customers.Count} {GetBenchmarkType(benchmark)} against {benchmark.testName} account in {benchmark.writeRegion} from {benchmark.testRegion}\nPress any key to continue\n...");
Console.WriteLine($"\n{benchmark.testDescription}\nPress any key to continue\n...");
Console.ReadKey(true);
int test = 0;
List <Result> results = new List <Result>(); //Individual Benchmark results
Stopwatch stopwatch = new Stopwatch();
foreach (SampleCustomer customer in customers)
{
stopwatch.Start();
ItemResponse <SampleCustomer> response = await benchmark.container.CreateItemAsync <SampleCustomer>(customer, new PartitionKey(benchmark.partitionKeyValue));
stopwatch.Stop();
Console.WriteLine($"Write {test++} of {customers.Count}, region: {benchmark.writeRegion}, Latency: {stopwatch.ElapsedMilliseconds} ms, Request Charge: {response.RequestCharge} RUs");
results.Add(new Result(stopwatch.ElapsedMilliseconds, response.RequestCharge));
stopwatch.Reset();
}
OutputResults(benchmark, results);
}
public static async Task CustomSyncBenchmark(Benchmark benchmark)
{
//Verify the benchmark is setup
await Benchmark.InitializeBenchmark(benchmark);
//Customers to insert
List <SampleCustomer> customers = SampleCustomer.GenerateCustomers(benchmark.partitionKeyValue, 100);
//Create Read client for custom sync
CosmosClient syncClient = new CosmosClient(benchmark.endpoint, benchmark.key, new CosmosClientOptions {
ApplicationRegion = benchmark.readRegion
});
Container syncContainer = syncClient.GetContainer(benchmark.databaseId, benchmark.containerId);
//Console.WriteLine($"\nTest {customers.Count} {GetBenchmarkType(benchmark)} against {benchmark.testName} account in {benchmark.writeRegion} from {benchmark.testName}\nPress any key to continue\n...");
Console.WriteLine($"\n{benchmark.testDescription}\nPress any key to continue\n...");
Console.ReadKey(true);
int test = 0;
List <Result> results = new List <Result>(); //Individual Benchmark results
Stopwatch stopwatch = new Stopwatch();
foreach (SampleCustomer customer in customers)
{
stopwatch.Start();
//write item in one region
ItemResponse <SampleCustomer> response = await benchmark.container.CreateItemAsync <SampleCustomer>(customer, new PartitionKey(benchmark.partitionKeyValue));
//read back in a second passing the session token with the LSN for the write
ItemResponse <SampleCustomer> syncResponse = await syncContainer.ReadItemAsync <SampleCustomer>(
customer.Id,
new PartitionKey(benchmark.partitionKeyValue),
new ItemRequestOptions { SessionToken = response.Headers.Session });
stopwatch.Stop();
Console.WriteLine($"Write {test++} of {customers.Count}, region: {benchmark.writeRegion}, Latency: {stopwatch.ElapsedMilliseconds} ms, Request Charge: {response.RequestCharge} RUs");
results.Add(new Result(stopwatch.ElapsedMilliseconds, response.RequestCharge));
stopwatch.Reset();
}
OutputResults(benchmark, results);
}
public async Task ProcessConflicts(ConflictGenerator conflictGenerator)
{
//Use West US 2 region to review conflicts
ReplicaRegion replicaRegion = conflictGenerator.replicaRegions.Find(s => s.region == "West US 2");
Container container = replicaRegion.client.GetContainer(conflictGenerator.databaseId, conflictGenerator.containerId);
FeedIterator <ConflictProperties> conflictFeed = container.Conflicts.GetConflictQueryIterator <ConflictProperties>();
while (conflictFeed.HasMoreResults)
{
FeedResponse <ConflictProperties> conflicts = await conflictFeed.ReadNextAsync();
foreach (ConflictProperties c in conflicts)
{
//Read the conflict and committed item
SampleCustomer conflict = container.Conflicts.ReadConflictContent <SampleCustomer>(c);
SampleCustomer committed = await container.Conflicts.ReadCurrentAsync <SampleCustomer>(c, new PartitionKey(conflict.MyPartitionKey));
switch (c.OperationKind)
{
case OperationKind.Create:
//For Inserts make the higher UserDefinedId value the winner
if (conflict.UserDefinedId >= committed.UserDefinedId)
{
await container.ReplaceItemAsync <SampleCustomer>(conflict, conflict.Id, new PartitionKey(conflict.MyPartitionKey));
}
break;
case OperationKind.Replace:
//For Updates make the lower UserDefinedId value the winner
if (conflict.UserDefinedId <= committed.UserDefinedId)
{
await container.ReplaceItemAsync <SampleCustomer>(conflict, conflict.Id, new PartitionKey(conflict.MyPartitionKey));
}
break;
case OperationKind.Delete:
//Generally don't resolve deleted items so do nothing
break;
}
// Delete the conflict
await container.Conflicts.DeleteAsync(c, new PartitionKey(conflict.MyPartitionKey));
}
}
}
private async Task <SampleCustomer> UpdateItemAsync(Container container, SampleCustomer customer)
{
Console.WriteLine($"Update - Name: {customer.Name}, City: {customer.City}, UserDefId: {customer.UserDefinedId}, Region: {customer.Region}");
try
{
ItemResponse <SampleCustomer> response = await container.ReplaceItemAsync <SampleCustomer>(
customer,
customer.Id,
new PartitionKey(customer.MyPartitionKey));
return(response.Resource);
}
catch
{
//Unable to create conflict
return(null);
}
}
public async Task GenerateInsertConflicts(ConflictGenerator conflict)
{
try
{
bool isConflicts = false;
Console.WriteLine($"{conflict.testName}\nPress any key to continue...\n");
Console.ReadKey(true);
//Verify the containers are created and referenced
await InitializeConflicts(conflict);
while (!isConflicts)
{
//Generate a sample customer
SampleCustomer customer = SampleCustomer.GenerateCustomers(conflict.partitionKeyValue, 1)[0];
//Task list for async inserts
List <Task <SampleCustomer> > tasks = new List <Task <SampleCustomer> >();
//Insert same customer into every region
foreach (ReplicaRegion replicaRegion in conflict.replicaRegions)
{
tasks.Add(InsertItemAsync(replicaRegion.container, replicaRegion.region, customer));
}
//await tasks
SampleCustomer[] insertedItems = await Task.WhenAll(tasks);
//Verify conflicts. If two or more items returned then conflicts occurred
isConflicts = IsConflict(insertedItems);
}
}
catch (CosmosException e)
{
Console.WriteLine(e.Message + "\nPress any key to continue");
Console.ReadKey();
}
}
private static SampleCustomer Clone(SampleCustomer source)
{ //Deep copy Document object
return(JsonConvert.DeserializeObject <SampleCustomer>(JsonConvert.SerializeObject(source)));
}
public async Task GenerateUpdateConflicts(ConflictGenerator conflict)
{
try
{
//Verify the containers are created and referenced
await InitializeConflicts(conflict);
bool isConflicts = false;
Console.WriteLine($"\n{conflict.testName}\nPress any key to continue...");
Console.ReadKey(true);
Console.WriteLine($"Insert an item to create an update conflict on.\n");
//Get reference to West US 2 region to insert a customer
ReplicaRegion insertRegion = conflict.replicaRegions.Find(s => s.region == "West US 2");
//Container to insert customer
Container insertContainer = insertRegion.container;
//Generate a new customer
SampleCustomer seedCustomer = SampleCustomer.GenerateCustomers(conflict.partitionKeyValue, 1)[0];
//Insert Customer
seedCustomer = await InsertItemAsync(insertContainer, insertRegion.region, seedCustomer);
//Wait for item to replicate globally
Console.WriteLine($"\nAllow item to replicate.\n");
//await Task.Delay(5000);
await VerifyItemReplicated(conflict, seedCustomer);
//Task list for async updates
IList <Task <SampleCustomer> > tasks = new List <Task <SampleCustomer> >();
//Read back the replicated customer and get the ETag
ItemResponse <SampleCustomer> customerResponse = await insertContainer.ReadItemAsync <SampleCustomer>(seedCustomer.Id, new PartitionKey(seedCustomer.MyPartitionKey));
Console.WriteLine($"Attempting simultaneous update in {replicaRegions.Count} regions\n");
while (!isConflicts)
{
foreach (ReplicaRegion updateRegion in conflict.replicaRegions)
{
//DeepCopy the item
SampleCustomer updateCustomer = ConflictGenerator.Clone(seedCustomer);
//Update region to where update is made and provide new UserDefinedId value
updateCustomer.Region = updateRegion.region;
updateCustomer.UserDefinedId = ConflictGenerator.RandomNext(0, 1000);
//Add update to Task List
tasks.Add(UpdateItemAsync(updateRegion.container, updateCustomer));
}
SampleCustomer[] updateCustomers = await Task.WhenAll(tasks);
isConflicts = IsConflict(updateCustomers);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message + "\nPress any key to continue");
Console.ReadKey();
}
}
private async Task <SampleCustomer> InsertItemAsync(Container container, string region, SampleCustomer item)
{
//DeepCopy the item
item = ConflictGenerator.Clone(item);
//Update the region
item.Region = region;
//Update UserDefinedId to random number for Conflict Resolution
item.UserDefinedId = ConflictGenerator.RandomNext(0, 1000);
Console.WriteLine($"Attempting insert - Name: {item.Name}, City: {item.City}, UserDefId: {item.UserDefinedId}, Region: {item.Region}");
try
{
ItemResponse <SampleCustomer> response = await container.CreateItemAsync <SampleCustomer>(item, new PartitionKey(item.MyPartitionKey));
if (response.StatusCode == System.Net.HttpStatusCode.Conflict)
{
return(null); //item has already replicated so not possible to generate conflict
}
else
{
return(response.Resource);
}
}
catch (CosmosException e)
{
//Conflict error
if (e.StatusCode == HttpStatusCode.Conflict)
{
return(null);
}
else
{
throw e;
}
}
}
public async Task ProcessConflicts(ConflictGenerator conflictGenerator)
{
Console.WriteLine($"\nReading conflicts feed to process any conflicts.\n{Helpers.Line}\nPress any key to continue...\n");
//Use West US 2 region to review conflicts
ReplicaRegion replicaRegion = conflictGenerator.replicaRegions.Find(s => s.region == "West US 2");
Container container = replicaRegion.client.GetContainer(conflictGenerator.databaseId, conflictGenerator.containerId);
FeedIterator <ConflictProperties> conflictFeed = container.Conflicts.GetConflictQueryIterator <ConflictProperties>();
while (conflictFeed.HasMoreResults)
{
FeedResponse <ConflictProperties> conflictFeedResponse = await conflictFeed.ReadNextAsync();
Console.WriteLine($"There are {conflictFeedResponse.Count} conflict(s) to process.\nPress any key to continue\n");
Console.ReadKey(true);
foreach (ConflictProperties conflictItem in conflictFeedResponse)
{
//Read the conflict and committed item
SampleCustomer conflict = container.Conflicts.ReadConflictContent <SampleCustomer>(conflictItem);
SampleCustomer committed = await container.Conflicts.ReadCurrentAsync <SampleCustomer>(conflictItem, new PartitionKey(conflict.MyPartitionKey));
Console.WriteLine($"Processing conflict on customer: {committed.Name}, in {committed.Region} region with conflict in {conflict.Region} region.\n{Helpers.Line}\n");
Console.WriteLine($"Conflict UserDefined Id = {conflict.UserDefinedId}. Committed UserDefined Id = {committed.UserDefinedId}");
switch (conflictItem.OperationKind)
{
case OperationKind.Create:
//For Inserts make the higher UserDefinedId value the winner
Console.WriteLine($"Processing insert conflict.\nReplace committed item if conflict has >= UserDefinedId.");
if (conflict.UserDefinedId >= committed.UserDefinedId)
{
Console.WriteLine($"Conflict is the winner. Press any key to replace committed item with conflict.\n");
Console.ReadKey(true);
await container.ReplaceItemAsync <SampleCustomer>(conflict, conflict.Id, new PartitionKey(conflict.MyPartitionKey));
}
else
{
Console.WriteLine($"Committed item is the winner. Press any key to continue.\n");
Console.ReadKey(true);
}
break;
case OperationKind.Replace:
//For Updates make the lower UserDefinedId value the winner
Console.WriteLine($"Processing update conflict.\nUpdate committed item if conflict has a <= UserDefinedId.");
if (conflict.UserDefinedId <= committed.UserDefinedId)
{
Console.WriteLine($"Conflict is the winner. Press any key to replace committed item with conflict.\n");
Console.ReadKey(true);
await container.ReplaceItemAsync <SampleCustomer>(conflict, conflict.Id, new PartitionKey(conflict.MyPartitionKey));
}
else
{
Console.WriteLine($"Committed item is the winner. Press any key to continue.\n");
Console.ReadKey(true);
}
break;
case OperationKind.Delete:
//Generally don't resolve deleted items so do nothing
break;
}
// Delete the conflict
await container.Conflicts.DeleteAsync(conflictItem, new PartitionKey(conflict.MyPartitionKey));
}
}
}