public static async Task <GStoreObject> Execute(ConnectionManager connectionManager, string partitionId, string serverId, string objectId)
{
Server server = null;
try
{
server = connectionManager.ChooseServerForRead(partitionId, serverId);
if (!server.Alive)
{
server = null;
}
}
catch (ServerBindException)
{
// nothing
}
while (true)
{
if (server == null)
{
IImmutableSet <Server> replicas = connectionManager.GetPartitionAliveReplicas(partitionId);
Random rnd = new Random();
server = replicas.ElementAt(rnd.Next(0, replicas.Count));
}
Console.WriteLine($"Trying: {server.Id}");
GStoreReadRequest gStoreReadRequest = new GStoreReadRequest()
{
ObjectIdentifier = new DataObjectIdentifier
{
PartitionId = partitionId,
ObjectId = objectId
}
};
try
{
GStoreReadReply gStoreReadReply = await server.Stub.ReadAsync(gStoreReadRequest);
return(CreateObject(gStoreReadReply.Object));
}
catch (Grpc.Core.RpcException e) when(e.StatusCode == Grpc.Core.StatusCode.Internal)
{
await connectionManager.DeclareDead(server.Id);
server = null;
}
}
}
private GStoreReadReply ExecuteRead(GStoreReadRequest request)
{
Console.WriteLine($"Read request -> PartitionId: {request.ObjectIdentifier.PartitionId} ObjectId: {request.ObjectIdentifier.ObjectId}");
GStoreObjectIdentifier gStoreObjectIdentifier = new GStoreObjectIdentifier(request.ObjectIdentifier.PartitionId, request.ObjectIdentifier.ObjectId);
string value = gStore.Read(gStoreObjectIdentifier);
if (value == null)
{
value = "N/A";
}
return(new GStoreReadReply
{
Object = DataObjectBuilder.FromObjectIdentifier(request.ObjectIdentifier, value)
});
}
public override Task <GStoreReadReply> Read(GStoreReadRequest request, ServerCallContext context)
{
return(Task.FromResult(ExecuteRead(request)));
}