public async Task CanAppendToStreamAndReadFromStreamForwardAndGetJsonBack()
{
var streamStore = new InMemoryStreamStore();
var stremId = new StreamId("test");
var jsonIn = @"{ 'Hello': 'World' }";
var message = new NewStreamMessage(Guid.NewGuid(), "Test", jsonIn);
await streamStore.AppendToStream(stremId, ExpectedVersion.Any, message);
var readStreamPage = await streamStore.ReadStreamForwards(stremId, StreamVersion.Start, int.MaxValue);
var jsonOut = await readStreamPage.Messages[0].GetJsonData();
Assert.Equal(1, readStreamPage.Messages.Length);
Assert.Equal(jsonIn, jsonOut);
}
public async Task ShowWithStream()
{
//setup a projection schema (one of many ways)
var projector = new AsyncSqlProjector(
Resolve.WhenEqualToHandlerMessageType(new PortfolioProjection()),
new TransactionalSqlCommandExecutor(
new ConnectionStringSettings(
"projac",
@"Data Source=(localdb)\ProjectsV12;Initial Catalog=ProjacUsage;Integrated Security=SSPI;",
"System.Data.SqlClient"),
IsolationLevel.ReadCommitted));
await projector.ProjectAsync(new object[] { new DropSchema(), new CreateSchema() });
//setup a memory eventstore
var store = new InMemoryStreamStore();
//setup a sample stream (using some sample events)
var portfolioId = Guid.NewGuid();
var events = new object[]
{
new PortfolioAdded {
Id = portfolioId, Name = "My Portfolio"
},
new PortfolioRenamed {
Id = portfolioId, Name = "Your Portfolio"
},
new PortfolioRemoved {
Id = portfolioId
}
};
var stream = string.Format("portfolio-{0}", portfolioId.ToString("N"));
await store.AppendToStream(
stream,
ExpectedVersion.Any,
events
.Select(@event => new NewStreamMessage(
Guid.NewGuid(),
@event.GetType().FullName,
JsonConvert.SerializeObject(@event)))
.ToArray());
//project the sample stream (until end of stream)
var result =
await store.ReadStreamForwards(stream, StreamVersion.Start, 1, true);
foreach (var rawMessage in result.Messages)
{
var @event = JsonConvert.DeserializeObject(
await rawMessage.GetJsonData(),
Type.GetType(rawMessage.Type, true));
await projector.ProjectAsync(@event);
}
while (!result.IsEnd)
{
result =
await store.ReadStreamForwards(stream, result.NextStreamVersion, 1, true);
foreach (var rawMessage in result.Messages)
{
var @event = JsonConvert.DeserializeObject(
await rawMessage.GetJsonData(),
Type.GetType(rawMessage.Type, true));
await projector.ProjectAsync(@event);
}
}
}