/// <summary>
/// Checks the primary node for the key, if a NMV is encountered, will retry on each replica.
/// </summary>
/// <typeparam name="T">The Type of the body of the request.</typeparam>
/// <param name="operation">The <see cref="IOperation" /> to execiute.</param>
/// <returns>
/// The result of the operation.
/// </returns>
public IOperationResult <T> ReadFromReplica <T>(ReplicaRead <T> operation)
{
//Is the cluster configured for Data services?
if (!ConfigInfo.IsDataCapable)
{
throw new ServiceNotSupportedException("The cluster does not support Data services.");
}
IOperationResult <T> result = new OperationResult <T> {
Success = false
};
do
{
var keyMapper = ConfigInfo.GetKeyMapper();
var vBucket = (IVBucket)keyMapper.MapKey(operation.Key);
operation.VBucket = vBucket;
if (vBucket.HasReplicas)
{
foreach (var index in vBucket.Replicas)
{
var replica = vBucket.LocateReplica(index);
if (replica == null)
{
continue;
}
result = replica.Send(operation);
if (result.Success && !result.IsNmv())
{
return(result);
}
operation = (ReplicaRead <T>)operation.Clone();
}
}
else
{
result = new OperationResult <T>
{
Id = operation.Key,
Status = ResponseStatus.NoReplicasFound,
Message = "No replicas found; have you configured the bucket for replica reads?",
Success = false
};
}
} while (result.ShouldRetry() && !result.Success && !operation.TimedOut());
if (!result.Success)
{
if (operation.TimedOut() &&
(result.Status != ResponseStatus.NoReplicasFound && result.Status != ResponseStatus.KeyNotFound))
{
const string msg = "The operation has timed out.";
((OperationResult)result).Message = msg;
((OperationResult)result).Status = ResponseStatus.OperationTimeout;
}
LogFailure(operation, result);
}
return(result);
}
/// <summary>
/// Checks the primary node for the key, if a NMV is encountered, will retry on each replica.
/// </summary>
/// <typeparam name="T">The Type of the body of the request.</typeparam>
/// <param name="operation">The <see cref="IOperation" /> to execiute.</param>
/// <returns>
/// The result of the operation.
/// </returns>
/// <exception cref="System.NotImplementedException"></exception>
public IOperationResult <T> ReadFromReplica <T>(ReplicaRead <T> operation)
{
var keyMapper = ConfigInfo.GetKeyMapper();
var vBucket = (IVBucket)keyMapper.MapKey(operation.Key);
operation.VBucket = vBucket;
IOperationResult <T> result = new OperationResult <T>();
foreach (var index in vBucket.Replicas)
{
var replica = vBucket.LocateReplica(index);
if (replica == null)
{
continue;
}
result = replica.Send(operation);
if (result.Success && !result.IsNmv())
{
return(result);
}
operation = (ReplicaRead <T>)operation.Clone();
}
return(result);
}
/// <summary>
/// Checks the primary node for the key, if a NMV is encountered, will retry on each replica.
/// </summary>
/// <typeparam name="T">The Type of the body of the request.</typeparam>
/// <param name="operation">The <see cref="IOperation" /> to execiute.</param>
/// <returns>
/// The result of the operation.
/// </returns>
/// <exception cref="System.NotImplementedException"></exception>
public IOperationResult <T> ReadFromReplica <T>(ReplicaRead <T> operation)
{
var keyMapper = ConfigInfo.GetKeyMapper();
var vBucket = (IVBucket)keyMapper.MapKey(operation.Key);
operation.VBucket = vBucket;
IOperationResult <T> result = null;
if (vBucket.HasReplicas)
{
foreach (var index in vBucket.Replicas)
{
var replica = vBucket.LocateReplica(index);
if (replica == null)
{
continue;
}
result = replica.Send(operation);
if (result.Success && !result.IsNmv())
{
return(result);
}
operation = (ReplicaRead <T>)operation.Clone();
}
}
else
{
result = new OperationResult <T>
{
Status = ResponseStatus.NoReplicasFound,
Message = "No replicas found; have you configured the bucket for replica reads?",
Success = false
};
}
return(result);
}
