public async Task ReadStateAsync(string grainType, GrainReference grainReference, GrainState grainState)
{
var stateName = grainState.GetType().Name;
var key = grainReference.ToKeyString();
var id = string.Format(CultureInfo.InvariantCulture, "{0}/{1}", stateName, key);
using (IAsyncDocumentSession session = this.documentStore.OpenAsyncSession())
{
var state = await session.LoadAsync<RavenJObject>(id);
if (state != null)
{
grainState.SetAll(state.ToDictionary(x => x.Key, x => x.Value.Value<object>()));
}
}
}
/// <summary>
/// Constructs a grain state instance by deserializing a JSON document.
/// </summary>
/// <param name="grainState">Grain state to be populated for storage.</param>
/// <param name="entityData">JSON storage format representaiton of the grain state.</param>
protected static void ConvertFromStorageFormat(GrainState grainState, string entityData)
{
JavaScriptSerializer deserializer = new JavaScriptSerializer();
object data = deserializer.Deserialize(entityData, grainState.GetType());
var dict = ((GrainState)data).AsDictionary();
grainState.SetAll(dict);
}
async Task IStorageProvider.ReadStateAsync(Type grainType, GrainReference grainReference, GrainState grainState)
{
var grainIdentity = GrainIdentity.FromGrainReference(grainType.FullName, grainReference);
if (_ignore)
return;
var state = await _dataManager.ReadStateAsync(grainIdentity);
if (null != state)
grainState.SetAll(state);
}
public virtual Task ReadStateAsync(string grainType, GrainReference grainReference, GrainState grainState)
{
Log.Info(0, "ReadStateAsync for {0} {1}", grainType, grainReference);
Interlocked.Increment(ref readCount);
lock (StateStore)
{
var storedState = GetLastState(grainType, grainReference);
grainState.SetAll(storedState); // Read current state data
}
return TaskDone.Done;
}
public async Task ReadStateAsync(string grainType, GrainReference grainReference, GrainState grainState)
{
var con = await GetFreeConnection();
var table = GetTableName(grainState);
string keyAsString = GetKey(grainReference);
string query;
if (CustomTable)
query = string.Format("select * from `{0}` where `guid` = \"{1}\";", table,
MySqlHelper.EscapeString(keyAsString));
else
query = string.Format("select * from `{0}` where `guid` = \"{1}\" AND `type` = \"{2}\";", table,
MySqlHelper.EscapeString(keyAsString), MySqlHelper.EscapeString(grainType));
using (var cmd = new MySqlCommand(query, con))
{
using (var reader = await cmd.ExecuteReaderAsync())
{
if (await reader.ReadAsync())
{
Dictionary<string, object> dict = new Dictionary<string, object>();
for (int i = 0; i < reader.FieldCount; ++i)
dict.Add(reader.GetName(i), reader.GetValue(i));
if (dict.ContainsKey("data"))
{
try
{
var data =
(GrainState)
Newtonsoft.Json.JsonConvert.DeserializeObject(dict["data"].ToString(),
grainState.GetType());
grainState.SetAll(data.AsDictionary());
}
catch
{
grainState.SetAll(null); /* corruption? */
}
}
else
grainState.SetAll(null);
}
}
}
await AddFreeConnection(con);
}
