public virtual async Task updateOtherGrainState()
{
var metadatagrainfactory = GrainFactory.GetGrain <IMetadataGrain>(0);
foreach (KeyValuePair <string, ConsistencyLevel> entry in State.readers)
{
switch (entry.Value)
{
case ConsistencyLevel.STRONG:
IStatefulGrain stategrain = await metadatagrainfactory.GetGrain(entry.Key, false, entry.Value);
await stategrain.SetState(State);
break;
}
}
foreach (KeyValuePair <string, ConsistencyLevel> entry in State.writers)
{
switch (entry.Value)
{
case ConsistencyLevel.STRONG:
IStatefulGrain stategrain = await metadatagrainfactory.GetGrain(entry.Key, true, entry.Value);
await stategrain.SetState(State);
break;
case ConsistencyLevel.EVENTUAL:
throw new NotImplementedException();
}
}
}
public async void periodicDataUpdate(object source, ElapsedEventArgs e)
{
var metadatagrainfactory = GrainFactory.GetGrain <IMetadataGrain>(0);
//TODO: this may break if the reader is created before any writer
IStatefulGrain writergrain = await metadatagrainfactory.GetGrain(State.writers.First().Key, true, State.writers.First().Value);
GrainState state = await writergrain.GetState();
await SetState(state);
}
private static void BasicTest()
{
var metadatagrain = Orleans.GrainClient.GrainFactory.GetGrain <IMetadataGrain>(0);
var stopwatch = Stopwatch.StartNew();
Task <IStatefulGrain> writertsk = metadatagrain.GetGrain(true, ConsistencyLevel.STRONG);
writertsk.Wait();
IStatefulGrain writer = writertsk.Result;
stopwatch.Stop();
Console.WriteLine("Time to create a writer {0}", stopwatch.ElapsedMilliseconds);
stopwatch.Start();
Task <IStatefulGrain> readertsk = metadatagrain.GetGrain(false, ConsistencyLevel.STRONG);
readertsk.Wait();
IStatefulGrain reader = readertsk.Result;
stopwatch.Stop();
Console.WriteLine("Time to create a reader {0}", stopwatch.ElapsedMilliseconds);
stopwatch.Start();
Task <Context> tskcnt = writer.SetValue(new KeyValuePair <string, string>("hello", "1"));
tskcnt.Wait();
Context cnt = tskcnt.Result;
stopwatch.Stop();
Console.WriteLine("Time to first write {0}", stopwatch.ElapsedMilliseconds);
writer.SetValue(new KeyValuePair <string, string>("how", "2")).Wait();
writer.SetValue(new KeyValuePair <string, string>("are", "3")).Wait();
stopwatch.Start();
writer.SetValue(new KeyValuePair <string, string>("you", "4")).Wait();
stopwatch.Stop();
Console.WriteLine("Time to 4th write {0}", stopwatch.ElapsedMilliseconds);
Task task1 = readData(reader, cnt, "how", 1);
Task.Delay(30).Wait();
Task task2 = readData(reader, cnt, "are", 2);
task1.Wait();
task2.Wait();
stopwatch.Start();
Task <string> value = reader.GetValue("are", cnt);
value.Wait();
Console.WriteLine("\n\n{0}\n\n", value.Result);
stopwatch.Stop();
Console.WriteLine("Time to read {0}", stopwatch.ElapsedMilliseconds);
}
private async Task updateState(Context cntxt)
{
if (State.currentContext.timestamp < cntxt.timestamp)
{
var metadatagrainfactory = GrainFactory.GetGrain <IMetadataGrain>(0);
//TODO: this may break if the reader is created before any writer
IStatefulGrain writergrain = await metadatagrainfactory.GetGrain(State.writers.First().Key, true, State.writers.First().Value);
GrainState state = await writergrain.GetState();
await SetState(state);
}
}
public override async Task updateOtherGrainState()
{
IWITWDMetadataGrain metadatagrain = GetMetadataGrain();
var fullReplicas = metadatagrain.GetAllFullReplicas().Result;
foreach (string entry in fullReplicas)
{
IStatefulGrain stategrain = await metadatagrain.GetGrain(entry, false, ConsistencyLevel.EVENTUAL);
await stategrain.SetState(State);
break;
}
}
private static Task readData(IStatefulGrain reader, Context cnt, string find, int id)
{
return(Task.Run(() =>
{
var stopwatch = Stopwatch.StartNew();
cnt.id = id;
Task <string> value = reader.GetValue(find, cnt);
value.Wait();
Console.WriteLine("\n\n{0}:{1}\n\n", id, value.Result);
stopwatch.Stop();
Console.WriteLine("Time to read {0}:{1}", id, stopwatch.ElapsedMilliseconds);
return 0;
}));
}
public GrainStateStorageBridge(string grainTypeName, IStatefulGrain grain, IStorageProvider store)
{
if (grainTypeName == null)
{
throw new ArgumentNullException("grainTypeName", "No grain type name supplied");
}
if (store == null)
{
throw new ArgumentNullException("store", "No storage provider supplied");
}
if (grain == null || grain.GrainState == null)
{
throw new ArgumentNullException("grain.GrainState", "No grain state object supplied");
}
this.grainTypeName = grainTypeName;
this.grain = grain;
this.baseGrain = grain as Grain;
this.store = store;
}
public GrainStateStorageBridge(string grainTypeName, IStatefulGrain grain, IStorageProvider store)
{
if (grainTypeName == null)
{
throw new ArgumentNullException("grainTypeName", "No grain type name supplied");
}
if (store == null)
{
throw new ArgumentNullException("store", "No storage provider supplied");
}
if (grain == null || grain.GrainState == null)
{
throw new ArgumentNullException("grain.GrainState", "No grain state object supplied");
}
this.grainTypeName = grainTypeName;
this.grain = grain;
this.baseGrain = grain as Grain;
this.store = store;
}
internal void SetGrain(Grain grain)
{
if (grain == null)
{
throw new ArgumentNullException(nameof(grain));
}
statefulGrain = grain as IStatefulGrain;
if (statefulGrain == null)
{
throw new ArgumentException("Attempt to configure storage bridge for a non-perisstent grain.", nameof(grain));
}
if (statefulGrain.GrainState == null)
{
throw new ArgumentException("No grain state object supplied", nameof(grain));
}
this.baseGrain = grain;
}
public async Task <IStatefulGrain> GetGrain(string primaryKey, bool readwrite, ConsistencyLevel level)
{
IStatefulGrain grain = null;
if (readwrite == true)
{
switch (level)
{
case ConsistencyLevel.STRONG:
grain = GrainFactory.GetGrain <IStronglyConsistentWriter>(primaryKey);
break;
case ConsistencyLevel.EVENTUAL:
throw new NotImplementedException();
}
}
else
{
switch (level)
{
case ConsistencyLevel.STRONG:
grain = GrainFactory.GetGrain <IStronglyConsistentReader>(primaryKey);
break;
case ConsistencyLevel.READ_MY_WRITE:
grain = GrainFactory.GetGrain <IReadMyWriteReader>(primaryKey);
break;
case ConsistencyLevel.BOUNDED:
grain = GrainFactory.GetGrain <IBoundedStalenessReader>(primaryKey);
break;
case ConsistencyLevel.EVENTUAL:
grain = GrainFactory.GetGrain <IEventuallyConsistentReader>(primaryKey);
break;
}
}
return(grain);
}
public async Task <IStatefulGrain> GetGrain(bool readwrite, ConsistencyLevel level)
{
IStatefulGrain grain = null;
string primaryKey = null;
if (readwrite == true)
{
switch (level)
{
case ConsistencyLevel.STRONG:
//TODO: Implement policy to see if new grain is needed.
//For now, we create a new grain each time
primaryKey = MetadataGrain.STRONG_WRITER + State.numInstances;
State.numInstances++;
grain = GrainFactory.GetGrain <IStronglyConsistentWriter>(primaryKey);
foreach (KeyValuePair <string, ConsistencyLevel> entry in State.readers)
{
await grain.RegisterReaderGrain(entry.Key, entry.Value);
}
foreach (KeyValuePair <string, ConsistencyLevel> entry in State.writers)
{
await grain.RegisterWriterGrain(entry.Key, entry.Value);
IStatefulGrain writergrain = null;
switch (entry.Value)
{
case ConsistencyLevel.STRONG:
writergrain = GrainFactory.GetGrain <IStronglyConsistentWriter>(entry.Key);
break;
case ConsistencyLevel.EVENTUAL:
throw new NotImplementedException();
}
await writergrain.RegisterWriterGrain(primaryKey, ConsistencyLevel.STRONG);
}
State.writers.Add(primaryKey, ConsistencyLevel.STRONG);
break;
case ConsistencyLevel.EVENTUAL:
throw new NotImplementedException();
}
}
else
{
switch (level)
{
case ConsistencyLevel.STRONG:
//TODO: Implement policy to see if new grain is needed.
//For now, we create a new grain each time
primaryKey = MetadataGrain.STRONG_READER + State.numInstances;
State.numInstances++;
grain = GrainFactory.GetGrain <IStronglyConsistentReader>(primaryKey);
break;
case ConsistencyLevel.READ_MY_WRITE:
primaryKey = MetadataGrain.RMW_READER + State.numInstances;
State.numInstances++;
grain = GrainFactory.GetGrain <IReadMyWriteReader>(primaryKey);
break;
case ConsistencyLevel.BOUNDED:
primaryKey = MetadataGrain.BOUNDED_STALENESS_READER + State.numInstances;
State.numInstances++;
grain = GrainFactory.GetGrain <IBoundedStalenessReader>(primaryKey);
break;
case ConsistencyLevel.EVENTUAL:
primaryKey = MetadataGrain.EVENTUAL_READER + State.numInstances;
State.numInstances++;
grain = GrainFactory.GetGrain <IEventuallyConsistentReader>(primaryKey);
break;
}
KeyValuePair <string, ConsistencyLevel> strongwriter = State.writers.First(writer => writer.Value == ConsistencyLevel.STRONG);
await grain.RegisterWriterGrain(strongwriter.Key, strongwriter.Value);
foreach (KeyValuePair <string, ConsistencyLevel> entry in State.writers)
{
IStatefulGrain writergrain = null;
switch (entry.Value)
{
case ConsistencyLevel.STRONG:
writergrain = GrainFactory.GetGrain <IStronglyConsistentWriter>(entry.Key);
break;
case ConsistencyLevel.EVENTUAL:
throw new NotImplementedException();
}
await writergrain.RegisterReaderGrain(primaryKey, level);
}
State.readers.Add(primaryKey, ConsistencyLevel.STRONG);
}
return(grain);
}
