public ReadObjectReply Read(ReadObjectRequest request)
{
Console.WriteLine("Received Read with params:");
Console.WriteLine($"Partition_id: {request.Key.PartitionId}");
Console.WriteLine($"Object_id: {request.Key.ObjectId}");
var requestedObject = new ObjectKey(request.Key);
if (KeyValuePairs.TryGetValue(requestedObject, out ObjectValueManager objectValueManager))
{
LocalReadWriteLock.AcquireReaderLock(-1);
objectValueManager.LockRead();
ReadObjectReply reply = new ReadObjectReply
{
Value = objectValueManager.Value
};
objectValueManager.UnlockRead();
LocalReadWriteLock.ReleaseReaderLock();
return(reply);
}
else
{
throw new RpcException(new Status(StatusCode.NotFound, $"Object <{request.Key.PartitionId}, {request.Key.ObjectId}> not found here"));
}
}
public void ReadObject(string partition_id, string object_id, string server_id)
{
// Check if connected Server has requested partition
if (ServersIdByPartition[partition_id].Count == 0)
{
Console.WriteLine($"No available server for partition {partition_id}");
return;
}
if (!ServersIdByPartition[partition_id].Contains(currentServerId))
{
if (server_id == "-1")
{
// Not connected to correct partition, and no optional server stated, connect to random server from partition
Random rnd = new Random();
var randomServerFromPartition = ServersIdByPartition[partition_id][rnd.Next(ServersIdByPartition[partition_id].Count)];
TryChangeCommunicationChannel(randomServerFromPartition);
}
else
{
TryChangeCommunicationChannel(server_id);
}
}
ReadObjectRequest request = new ReadObjectRequest
{
Key = new Key
{
PartitionId = partition_id,
ObjectId = object_id
}
};
try
{
var reply = Client.ReadObject(request);
Console.WriteLine("Received: " + reply.Value);
} catch (RpcException e)
{
// If error is because Server failed, update list of crashed Servers
if (e.Status.StatusCode == StatusCode.Unavailable || e.Status.StatusCode == StatusCode.DeadlineExceeded || e.Status.StatusCode == StatusCode.Internal)
{
UpdateCrashedServersList();
}
Console.WriteLine($"Error: {e.Status.StatusCode}");
Console.WriteLine($"Error message: {e.Status.Detail}");
Console.WriteLine("N/A");
}
}
// Read Object
public override Task <ReadObjectReply> ReadObject(ReadObjectRequest request, ServerCallContext context)
{
return(Task.FromResult(Read(request)));
}