/// <summary>
/// Async method to cause refresh of the current grain state data from backing store.
/// Any previous contents of the grain state data will be overwritten.
/// </summary>
public async Task ReadStateAsync()
{
const string what = "ReadState";
Stopwatch sw = Stopwatch.StartNew();
GrainReference grainRef = baseGrain.GrainReference;
try
{
await store.ReadStateAsync(grainTypeName, grainRef, grain.GrainState);
StorageStatisticsGroup.OnStorageRead(store, grainTypeName, grainRef, sw.Elapsed);
}
catch (Exception exc)
{
StorageStatisticsGroup.OnStorageReadError(store, grainTypeName, grainRef);
string errMsg = MakeErrorMsg(what, exc);
store.Log.Error((int)ErrorCode.StorageProvider_ReadFailed, errMsg, exc);
throw new OrleansException(errMsg, exc);
}
finally
{
sw.Stop();
}
}
/// <summary>
/// Async method to cause refresh of the current grain state data from backing store.
/// Any previous contents of the grain state data will be overwritten.
/// </summary>
public async Task ReadStateAsync()
{
const string what = "ReadState";
Stopwatch sw = Stopwatch.StartNew();
try
{
CheckRuntimeContext();
await store.ReadStateAsync(name, grainRef, grainState);
StorageStatisticsGroup.OnStorageRead(name, grainRef, sw.Elapsed);
}
catch (Exception exc)
{
StorageStatisticsGroup.OnStorageReadError(name, grainRef);
string errMsg = MakeErrorMsg(what, exc);
this.logger.Error((int)ErrorCode.StorageProvider_ReadFailed, errMsg, exc);
if (!(exc is OrleansException))
{
throw new OrleansException(errMsg, exc);
}
throw;
}
finally
{
sw.Stop();
}
}
/// <summary>
/// Async method to cause refresh of the current grain state data from backin store.
/// Any previous contents of the grain state data will be overwritten.
/// </summary>
public async Task ReadStateAsync()
{
const string what = "ReadState";
Stopwatch sw = Stopwatch.StartNew();
// The below is the worng way to create GrainReference.
// IAddressable.AsReference is also a wrong way to get GrainReference.
// Both are weakly types and lose the actual strongly typed Grain Reference.
GrainReference grainRef = RuntimeClient.Current.CurrentActivationData.GrainReference;
IStorageProvider storage = GetCheckStorageProvider(what);
try
{
await storage.ReadStateAsync(grainTypeName, grainRef, this);
StorageStatisticsGroup.OnStorageRead(storage, grainTypeName, grainRef, sw.Elapsed);
}
catch (Exception exc)
{
StorageStatisticsGroup.OnStorageReadError(storage, grainTypeName, grainRef);
string errMsg = MakeErrorMsg(what, grainRef, exc);
storage.Log.Error((int)ErrorCode.StorageProvider_ReadFailed, errMsg, exc);
throw new OrleansException(errMsg, exc);
}
finally
{
sw.Stop();
}
}
/// <summary>
/// Async method to cause write of the current grain state data into backing store.
/// </summary>
public async Task WriteStateAsync()
{
const string what = "WriteState";
Stopwatch sw = Stopwatch.StartNew();
GrainReference grainRef = baseGrain.GrainReference;
Exception errorOccurred;
try
{
await store.WriteStateAsync(grainTypeName, grainRef, statefulGrain.GrainState);
StorageStatisticsGroup.OnStorageWrite(store, grainTypeName, grainRef, sw.Elapsed);
errorOccurred = null;
}
catch (Exception exc)
{
errorOccurred = exc;
}
// Note, we can't do this inside catch block above, because await is not permitted there.
if (errorOccurred != null)
{
StorageStatisticsGroup.OnStorageWriteError(store, grainTypeName, grainRef);
string errMsgToLog = MakeErrorMsg(what, errorOccurred);
store.Log.Error((int)ErrorCode.StorageProvider_WriteFailed, errMsgToLog, errorOccurred);
// If error is not specialization of OrleansException, wrap it
if (!(errorOccurred is OrleansException))
{
errorOccurred = new OrleansException(errMsgToLog, errorOccurred);
}
#if REREAD_STATE_AFTER_WRITE_FAILED
// Force rollback to previously stored state
try
{
sw.Restart();
store.Log.Warn(ErrorCode.StorageProvider_ForceReRead, "Forcing re-read of last good state for grain Type={0}", grainTypeName);
await store.ReadStateAsync(grainTypeName, grainRef, grain.GrainState);
StorageStatisticsGroup.OnStorageRead(store, grainTypeName, grainRef, sw.Elapsed);
}
catch (Exception exc)
{
StorageStatisticsGroup.OnStorageReadError(store, grainTypeName, grainRef);
// Should we ignore this secondary error, and just return the original one?
errMsgToLog = MakeErrorMsg("re-read state from store after write error", exc);
errorOccurred = new OrleansException(errMsgToLog, exc);
}
#endif
}
sw.Stop();
if (errorOccurred != null)
{
throw errorOccurred;
}
}