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static private FromError ( ResultCode code, string message, bool nodeOffline ) : |
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| code | ResultCode | |
| message | string | |
| nodeOffline | bool | |
| return | ||
/// <summary>
/// Executes a delegate function using a <see cref="IRiakConnection"/>, and returns the results.
/// Can retry up to "<paramref name="retryAttempts"/>" times for <see cref="ResultCode.NoRetries"/> and <see cref="ResultCode.ShuttingDown"/> error states.
/// This method is used over <see cref="RiakEndPoint.UseConnection"/> to keep a connection open to receive streaming results.
/// </summary>
/// <typeparam name="TResult">The type of the result from the <paramref name="useFun"/> parameter.</typeparam>
/// <param name="useFun">
/// The delegate function to execute. Takes an <see cref="IRiakConnection"/> and an <see cref="Action"/> continuation as input, and returns a
/// <see cref="RiakResult{T}"/> containing an <see cref="IEnumerable{TResult}"/> as the results of the operation.
/// </param>
/// <param name="retryAttempts">The number of times to retry an operation.</param>
/// <returns>The results of the <paramref name="useFun"/> delegate.</returns>
public override RiakResult <IEnumerable <TResult> > UseDelayedConnection <TResult>(Func <IRiakConnection, Action, RiakResult <IEnumerable <TResult> > > useFun, int retryAttempts)
{
if (retryAttempts < 0)
{
return(RiakResult <IEnumerable <TResult> > .FromError(ResultCode.NoRetries, "Unable to access a connection on the cluster (no more retries).", false));
}
if (disposing)
{
return(RiakResult <IEnumerable <TResult> > .FromError(ResultCode.ShuttingDown, "System currently shutting down", true));
}
var errorMessages = new List <string>();
var node = loadBalancer.SelectNode();
if (node != null)
{
var result = node.UseDelayedConnection(useFun);
if (!result.IsSuccess)
{
errorMessages.Add(result.ErrorMessage);
if (result.ResultCode == ResultCode.NoConnections)
{
Thread.Sleep(RetryWaitTime);
return(UseDelayedConnection(useFun, retryAttempts - 1));
}
if (result.ResultCode == ResultCode.CommunicationError)
{
MaybeDeactivateNode(result.NodeOffline, node);
Thread.Sleep(RetryWaitTime);
return(UseDelayedConnection(useFun, retryAttempts - 1));
}
}
return(result);
}
string msg = string.Format("Unable to access functioning Riak node, error(s): {0}", string.Join(", ", errorMessages));
return(RiakResult <IEnumerable <TResult> > .FromError(ResultCode.ClusterOffline, msg, true));
}
/// <summary>
/// Executes a delegate function using a <see cref="IRiakConnection"/>, and returns the results.
/// Can retry up to "<paramref name="retryAttempts"/>" times for <see cref="ResultCode.NoRetries"/> and <see cref="ResultCode.ShuttingDown"/> error states.
/// This method is used over <see cref="RiakEndPoint.UseConnection"/> to keep a connection open to receive streaming results.
/// </summary>
/// <typeparam name="TResult">The type of the result from the <paramref name="useFun"/> parameter.</typeparam>
/// <param name="useFun">
/// The delegate function to execute. Takes an <see cref="IRiakConnection"/> and an <see cref="Action"/> continuation as input, and returns a
/// <see cref="RiakResult{T}"/> containing an <see cref="IEnumerable{TResult}"/> as the results of the operation.
/// </param>
/// <param name="retryAttempts">The number of times to retry an operation.</param>
/// <returns>The results of the <paramref name="useFun"/> delegate.</returns>
public override RiakResult <IEnumerable <TResult> > UseDelayedConnection <TResult>(Func <IRiakConnection, Action, RiakResult <IEnumerable <TResult> > > useFun, int retryAttempts)
{
if (retryAttempts < 0)
{
return(RiakResult <IEnumerable <TResult> > .FromError(ResultCode.NoRetries, "Unable to access a connection on the cluster.", false));
}
if (disposing)
{
return(RiakResult <IEnumerable <TResult> > .FromError(ResultCode.ShuttingDown, "System currently shutting down", true));
}
var node = loadBalancer.SelectNode();
if (node != null)
{
var result = node.UseDelayedConnection(useFun);
if (!result.IsSuccess)
{
if (result.ResultCode == ResultCode.NoConnections)
{
Thread.Sleep(RetryWaitTime);
return(UseDelayedConnection(useFun, retryAttempts - 1));
}
if (result.ResultCode == ResultCode.CommunicationError)
{
if (result.NodeOffline)
{
DeactivateNode(node);
}
Thread.Sleep(RetryWaitTime);
return(UseDelayedConnection(useFun, retryAttempts - 1));
}
}
return(result);
}
return(RiakResult <IEnumerable <TResult> > .FromError(ResultCode.ClusterOffline, "Unable to access functioning Riak node", true));
}