private async Task UpdateDocument(FailoverTestClient defaultClient, IEnumerable <FailoverTestClient> replicaClients)
{
while (!_exit)
{
var response1 = await defaultClient.UpsertItem("ATL", "A", "11", "S123");
Console.WriteLine($"{DateTime.Now}: Upsert to region: {defaultClient.WriteRegion,-15}; latency: {response1.Item1}");
foreach (var replicaClient in replicaClients)
{
// read replica region
var response2 = await replicaClient.GetItem("ATL", "A", "11", "S123");
Console.WriteLine($"{DateTime.Now}: Read from region: {replicaClient.ReadRegion,-15}; latency: {response2.Item1}");
var region = replicaClient.ReadRegion;
if (response1.Item2.text != response2.Item2.text)
{
throw new Exception("Replication failed!!!");
}
}
// read default region (primary)
var response3 = await defaultClient.GetItem("ATL", "A", "11", "S123");
Console.WriteLine($"{DateTime.Now}: Read from region: {defaultClient.ReadRegion,-15}; latency: {response3.Item1}");
}
}
public static async Task <FailoverTestClient> GetFailoverTestClient(Uri cosmosDbEndpoint, string authorizationKey, string databaseName, string collectionName, int collectionThroughput, IEnumerable <string> regions = null, bool cleanupOnStart = false)
{
var client = new FailoverTestClient(cosmosDbEndpoint, authorizationKey, regions);
client._databaseName = databaseName;
client._collectionName = collectionName;
await client.DocumentClient.GetOrCreateCollection(client._databaseName, client._collectionName, collectionThroughput, "/partitionKey", cleanupOnStart);
client._databaseUri = UriFactory.CreateDatabaseUri(client._databaseName);
client._collectionUri = UriFactory.CreateDocumentCollectionUri(client._databaseName, client._collectionName);
return(client);
}
private async Task RunAsync()
{
await GetCosmosDbAccount(_config.ResourceGroup, _config.CosmosDbName, _config.Regions);
Console.WriteLine($"CosmosDbFailover starting...");
Console.WriteLine($"Cosmos DB: {_config.CosmosDbName}");
Console.WriteLine($"Regions:");
foreach (var region in _cosmosDbAccount.Regions)
{
Console.WriteLine($"\t{region.LocationName}");
}
Console.WriteLine($"Collection: {_config.DatabaseName}.{_config.CollectionName}");
Console.WriteLine($"RU's: {_config.CollectionThroughput}");
Console.WriteLine("Hit Enter to start failover");
Console.WriteLine("Hit Esc to exit test");
var cosmosDbEndpoint = new Uri(_cosmosDbAccount.EndPoint);
var replicaClients = new List <FailoverTestClient>();
var defaultClient = await FailoverTestClient.GetFailoverTestClient(cosmosDbEndpoint, _cosmosDbAccount.MasterKey, _config.DatabaseName, _config.CollectionName, _config.CollectionThroughput);
// Skip the first region, which is the primary region, to get replica regions
var replicaRegions = _cosmosDbAccount.Regions.OrderBy(r => r.FailoverPriority).Skip(1);
// Create DocumentDb API client in each replica region
foreach (var replicaRegion in replicaRegions)
{
var replicaClient = await FailoverTestClient.GetFailoverTestClient(cosmosDbEndpoint, _cosmosDbAccount.MasterKey, _config.DatabaseName, _config.CollectionName, _config.CollectionThroughput, new List <string>() { replicaRegion.LocationName });
replicaClients.Add(replicaClient);
}
try
{
// Create DocumentDb API client using default region
var tasks = new List <Task>();
var readConsoleTask = ReadConsoleKeys();
tasks.Add(readConsoleTask);
var writeTask = UpdateDocument(defaultClient, replicaClients);
tasks.Add(writeTask);
var failoverTask = Failover();
tasks.Add(failoverTask);
await Task.WhenAll(tasks.ToArray());
}
finally
{
if (_config.CleanupDatabaseOnFinish)
{
await DocumentDbUtility.DeleteDatabase(defaultClient.DocumentClient, _config.DatabaseName);
}
defaultClient.Dispose();
foreach (var replicaClient in replicaClients)
{
replicaClient.Dispose();
}
if (_config.CleanupAcountOnFinish)
{
Console.WriteLine($"Deleting {_cosmosDbAccount.EndPoint}");
await _cosmosDbAccount.DeleteAsync();
}
}
}