private RideResponse recordRide(string rideId, string username, Unicorn unicorn)
{
//The client represents a connection to dynamo db's management plane
using (var client = new Amazon.DynamoDBv2.AmazonDynamoDBClient()){
//create a data context
var context = new Amazon.DynamoDBv2.DataModel.DynamoDBContext(client);
//populate the ride object
Ride r = new Ride();
r.Unicorn = unicorn;
r.RideId = rideId;
r.User = username;
r.RequestTime = DateTime.UtcNow;
r.UnicornName = unicorn.Name;
//Now persist it to DynamoDB, it is async but here we are waiting so that we know it has completed or failed
context.SaveAsync(r).GetAwaiter().GetResult();
//now build the response object
var rr = new RideResponse();
rr.ETA = $"30 seconds";
rr.Unicorn = unicorn;
rr.RideId = rideId;
rr.Rider = username;
rr.UnicornName = unicorn?.Name;
return(rr);
}
}
public void FromDbEntryPerformance()
{
var count = 10000;
var options = new DynamoDBProviderOptions("proto_actor_events", "proto_actor_snapshots");
var provider = new DynamoDBProvider(_client, options);
var dynamoDBContext = new DynamoDBContext(_client);
var fromDocumentMI = typeof(DynamoDBContext).GetMethods().First(m => m.Name == "FromDocument" && m.GetParameters().Count() == 1);
var toDocumentMI = typeof(DynamoDBContext).GetMethods().First(m => m.Name == "ToDocument" && m.GetParameters().Count() == 1);
var obj = SomeObj.GetMe();
var doc = dynamoDBContext.ToDocument(obj);
var stopwatch = new Stopwatch();
stopwatch.Start();
for (var i = 0; i < count; i++)
{
// Simulate what provider does
var dataType = Type.GetType(typeof(SomeObj).AssemblyQualifiedName);
var data = dynamoDBContext.FromDocumentDynamic(doc, dataType);
}
stopwatch.Stop();
// Console.WriteLine(String.Format("FromDbEntryPerformance: Total: {0}, Per item: {1}", stopwatch.Elapsed.TotalMilliseconds, stopwatch.Elapsed.TotalMilliseconds / count));
Assert.True(stopwatch.Elapsed.TotalMilliseconds / count < 0.05);
}
public DynamoDBProvider(IAmazonDynamoDB dynamoDBClient, DynamoDBProviderOptions options)
{
if (dynamoDBClient == null)
{
throw new ArgumentNullException(nameof(dynamoDBClient));
}
_options = options ?? throw new ArgumentNullException(nameof(options));
_dynamoDBContext = new DynamoDBContext(
dynamoDBClient, new DynamoDBContextConfig {
Conversion = DynamoDBEntryConversion.V2, ConsistentRead = true
}
);
_eventsTable = Table.LoadTable(dynamoDBClient, options.EventsTableName, DynamoDBEntryConversion.V2);
_snapshotsTable = Table.LoadTable(dynamoDBClient, options.SnapshotsTableName, DynamoDBEntryConversion.V2);
}
public TicketService(ITicketsDatabaseSettings settings)
{
_client = new AmazonDynamoDBClient();
_context = new Amazon.DynamoDBv2.DataModel.DynamoDBContext(_client);
}
