#Orleans Event-sourcing Library
###What is Orleans Project Orleans provides a straightforward approach to building distributed high-scale computing applications.
###USE CASE you can see the detail from simple project
###Install From Nuget Install-Package Orleans.EventSourcing
####Server Config Couchbase event store Install-Package Orleans.EventSourcing.Couchbase
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<sectionGroup name="couchbaseClients">
<section name="couchbaseDataStore" type="Couchbase.Configuration.Client.Providers.CouchbaseClientSection, Couchbase.NetClient" />
<section name="couchbaseEventStore" type="Couchbase.Configuration.Client.Providers.CouchbaseClientSection, Couchbase.NetClient" />
</sectionGroup>
<section name="eventStoreProvider" type="Orleans.EventSourcing.EventStoreSection,Orleans.EventSourcing" />
</configSections>
<eventStoreProvider>
<provider Name="CouchBaseEventStore" Type="Orleans.EventSourcing.Couchbase.EventStoreProvider,Orleans.EventSourcing.Couchbase" Default="true" ConfigSection="couchbaseClients/couchbaseEventStore" />
</eventStoreProvider>
<couchbaseClients>
<couchbaseEventStore>
<servers>
<add uri="http://192.168.0.100:8091"/>
</servers>
<buckets>
<add name="eventstore" password="eventstore" useSsl="false" />
</buckets>
</couchbaseEventStore>
</couchbaseClients>
<runtime>
<gcServer enabled="true"/>
</runtime>
</configuration>MongoDB event store
Install-Package Orleans.EventSourcing.MongoDB
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="eventStoreProvider" type="Orleans.EventSourcing.EventStoreSection,Orleans.EventSourcing" />
</configSections>
<eventStoreProvider>
<provider Name="MongoDBEventStore" Type="Orleans.EventSourcing.MongoDB.EventStoreProvider,Orleans.EventSourcing.MongoDB" Default="true" DatabaseName="eventstore" ConnectionString="mongodb://192.168.2.10:27017" />
</eventStoreProvider>
</configuration>public bool Run()
{
bool ok = false;
try
{
siloHost.InitializeOrleansSilo();
var eventStoreSection = (EventStoreSection)ConfigurationManager.GetSection("eventStoreProvider");
var assembly = Assembly.LoadFrom(".\\Applications\\Orleans.EventSourcing.SimpleGrain\\Orleans.EventSourcing.SimpleGrain.dll");
siloHost.UseEventStore(eventStoreSection).RegisterGrain(GetEventTypeNameAndCodeMapping(), assembly);
ok = siloHost.StartOrleansSilo();
if (ok)
{
Console.WriteLine(string.Format("Successfully started Orleans silo '{0}' as a {1} node.", siloHost.Name, siloHost.Type));
}
else
{
throw new SystemException(string.Format("Failed to start Orleans silo '{0}' as a {1} node.", siloHost.Name, siloHost.Type));
}
}
catch (Exception exc)
{
siloHost.ReportStartupError(exc);
var msg = string.Format("{0}:\n{1}\n{2}", exc.GetType().FullName, exc.Message, exc.StackTrace);
Console.WriteLine(msg);
}
return ok;
}
private Dictionary<string, uint> GetEventTypeNameAndCodeMapping()
{
//Generate from EventTypeCodeRegisterTool
var typeCodeDic = new Dictionary<string, uint>();
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.BankAccountInitializeEvent", 1001);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransactionPreparationAddedEvent", 1002);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransactionPreparationCommittedEvent", 1003);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransactionPreparationCanceledEvent", 1004);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransferTransactionStartedEvent", 1005);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.AccountValidatePassedEvent", 1006);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransferOutPreparationConfirmedEvent", 1007);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransferInPreparationConfirmedEvent", 1008);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransferOutConfirmedEvent", 1009);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransferInConfirmedEvent", 1010);
typeCodeDic.Add("Orleans.EventSourcing.SimpleGrain.Events.TransferCanceledEvent", 1011);
return typeCodeDic;
}####How to generate Event Code
Note: please keep the event code same as before in your products, Event code generator tool just for easy to use
####Grain code
[EventStoreProvider(ProviderName = "CouchBaseEventStore")]
[StorageProvider(ProviderName = "CouchbaseStore")]
public class BankAccount : EventSourcingGrain<BankAccount, IBankAcountState>, IBankAccount
{
...
}please note,if you config provider Default="true",when grain do not has a [EventStoreProvider] attribute, this grain will use the default event provider.
you can config many eventstore provider like Orleans' StorageProvider, and use by a similar way.
<provider Name="CouchBaseEventStore" Type="Orleans.EventSourcing.Couchbase.EventStoreProvider,Orleans.EventSourcing.Couchbase" Default="true" ConfigSection="couchbaseClients/couchbaseEventStore" />