Orleans Blob Storage Provider

Stores Orleans grain state in blob storage as Json.

The master branch targets the latest release.

The April_14 branch targets the initial release.

Installation

The Orleans SDK must be installed first.

Using NuGet, with the GrainClasses (or Silo Host) project as your target:

Install-Package Orleans.StorageProvider.Blob

Then register the provider in your Silo Configuration:

<?xml version="1.0" encoding="utf-8"?>
<OrleansConfiguration xmlns="urn:orleans">
  <Globals>
    <StorageProviders>
      <Provider Type="Orleans.StorageProvider.Blob.BlobStorageProvider" Name="BlobStore" DataConnectionString="UseDevelopmentStorage=true" ContainerName="grainstate"/>
    </StorageProviders>
    ...

Optional Attributes that can be added to the provider element

• PreserveReferencesHandling="true" - Preserves reference handling for objects during Json serialization

Then from your grain code configure grain storage:

// define a state interface
public interface IMyGrainState : IGrainState
{
    string Value { get; set; }
}

// Select the BlobStore as the storage provider for the grain
[StorageProvider(ProviderName="BlobStore")]
public class Grain1 : Orleans.Grain<IMyGrainState>, IGrain1
{
    public Task Test(string value)
    {
    	// set the state and save it
        this.State.Value = value;
        return this.State.WriteStateAsync();
    }

}

Grains are stored in json format with the following convention for blob names:

{GrainType}-{GrainId}.json

i.e.

GrainCollection1.Grain1-0.json

License

MIT