/// <summary>
/// Combine multiple fetch requests in one call.
/// </summary>
/// <param name="request">
/// The list of fetch requests.
/// </param>
/// <returns>
/// A list of sets of fetched messages.
/// </returns>
/// <remarks>
/// Offset is passed in on every request, allowing the user to maintain this metadata
/// however they choose.
/// </remarks>
public IList <BufferedMessageSet> MultiFetch(MultiFetchRequest request)
{
var result = new List <BufferedMessageSet>();
short tryCounter = 1;
while (tryCounter <= this.config.NumberOfTries)
{
try
{
using (var conn = new KafkaConnection(
this.host,
this.port,
this.config.BufferSize,
this.config.SocketTimeout))
{
conn.Write(request);
int size = conn.Reader.ReadInt32();
return(BufferedMessageSet.ParseMultiFrom(conn.Reader, size, request.ConsumerRequests.Count, request.ConsumerRequests.Select(x => x.Offset).ToList()));
}
}
catch (Exception ex)
{
// if maximum number of tries reached
if (tryCounter == this.config.NumberOfTries)
{
throw;
}
tryCounter++;
Logger.InfoFormat(CultureInfo.CurrentCulture, "MultiFetch reconnect due to {0}", ex);
}
}
return(result);
}
/// <summary>
/// Combine multiple fetch requests in one call.
/// </summary>
/// <param name="request">
/// The list of fetch requests.
/// </param>
/// <returns>
/// A list of sets of fetched messages.
/// </returns>
/// <remarks>
/// Offset is passed in on every request, allowing the user to maintain this metadata
/// however they choose.
/// </remarks>
public IList <BufferedMessageSet> MultiFetch(MultiFetchRequest request)
{
KafkaConnection conn = null;
int size = 0;
var result = new List <BufferedMessageSet>();
short tryCounter = 1;
while (tryCounter <= this.config.NumberOfTries)
{
try
{
conn = KafkaClusterConnectionPool.GetConnection(this.host, this.port);
conn.Write(request);
size = conn.Reader.ReadInt32();
result = (BufferedMessageSet.ParseMultiFrom(conn.Reader,
size,
request.ConsumerRequests.Count,
request.ConsumerRequests.Select(x => x.Offset).ToList())) as List <BufferedMessageSet>;
break;
}
catch (Exception ex)
{
// if maximum number of tries reached
if (tryCounter == this.config.NumberOfTries)
{
throw;
}
tryCounter++;
Logger.InfoFormat(CultureInfo.CurrentCulture, "MultiFetch reconnect due to {0}", ex);
}
finally
{
KafkaClusterConnectionPool.ReleaseConnection(conn);
}
}
return(result);
}