/**
* <summary>
* This method executes request to a communication layer and handles connection error, if it occurs. Server
* is picked up according to the projection affinity and key given. Connection will be made with the node
* on which key is cached. In case of communication exception client instance is notified and new instance
* of client is created. If none of servers can be reached, an exception is thrown.</summary>
*
* <param name="c">Closure to be executed.</param>
* <param name="cacheName">Cache name for which mapped node will be calculated.</param>
* <param name="affKey">Affinity key.</param>
* <returns>Closure result.</returns>
*/
protected IGridClientFuture <TRes> WithReconnectHandling <TRes>(Func <IGridClientConnection, Guid, IGridClientFuture <TRes> > c, String cacheName, Object affKey)
{
IGridClientDataAffinity affinity = cfg.Affinity(cacheName);
// If pinned (fixed-nodes) or no affinity provided use balancer.
if (_nodes != null || affinity == null)
{
return(WithReconnectHandling(c));
}
try {
IList <N> prjNodes = ProjectionNodes();
if (prjNodes.Count == 0)
{
throw new GridClientServerUnreachableException("Failed to get affinity node" +
" (no nodes in topology were accepted by the filter): " + _filter);
}
N node = affinity.Node(affKey, prjNodes);
GridClientConnectionManager connMgr = cfg.ConnectionManager;
for (int i = 0; i < RetryCount; i++)
{
IGridClientConnection conn = null;
try {
conn = connMgr.connection(node);
return(c(conn, node.Id));
}
catch (GridClientConnectionIdleClosedException e) {
connMgr.onFacadeFailed(node, conn, e);
}
catch (GridClientConnectionResetException e) {
connMgr.onFacadeFailed(node, conn, e);
if (!CheckNodeAlive(node.Id))
{
throw new GridClientServerUnreachableException("Failed to communicate with mapped grid node" +
" for given affinity key (node left the grid)" +
" [nodeId=" + node.Id + ", affKey=" + affKey + ']');
}
}
}
throw new GridClientServerUnreachableException("Failed to communicate with mapped grid node for given affinity " +
"key (did node left the grid?) [nodeId=" + node.Id + ", affKey=" + affKey + ']');
}
catch (GridClientException e) {
return(new GridClientFinishedFuture <TRes>(() => {
throw e;
}));
}
}
/** <inheritdoc /> */
public Guid Affinity <TKey>(TKey key)
{
IGridClientDataAffinity affinity = cfg.Affinity(CacheName);
if (affinity == null)
{
return(Guid.Empty);
}
return(affinity.Node(key, ProjectionNodes()).Id);
}
