/**
* <summary>
* Finishes user request to the grid.</summary>
*
* <param name="fut">Future used to pass result to the user.</param>
* <param name="resp">Incoming response message.</param>
*/
private void finishRequest(GridClientFuture fut, GridClientResponse resp)
{
switch (resp.Status)
{
case GridClientResponseStatus.Success:
fut.Done(resp.Result);
break;
case GridClientResponseStatus.Failed:
var error = resp.ErrorMessage;
if (error == null)
{
error = "Unknown server error";
}
fut.Fail(() => {
throw new GridClientException(error);
});
break;
case GridClientResponseStatus.AuthFailure:
fut.Fail(() => {
throw new GridClientAuthenticationException("Authentication failed (session expired?)" +
" errMsg=" + resp.ErrorMessage + ", [srv=" + ServerAddress + "]");
});
U.Async(() => Close(false));
break;
case GridClientResponseStatus.AuthorizationFailure:
fut.Fail(() => {
throw new GridClientException("Client authorization failed: " + resp.ErrorMessage);
});
break;
default:
fut.Fail(() => {
throw new GridClientException("Unknown server response status code: " + resp.Status);
});
break;
}
pendingReqs.Remove(resp.RequestId);
}
/**
* <summary>
* Creates new future and passes it to the MakeJettyRequest.</summary>
*
* <param name="args">Request parameters.</param>
* <param name="destNodeId">Node ID to route request to.</param>
* <param name="converter">Response converter to pass into generated future.</param>
* <returns>Future.</returns>
* <exception cref="GridClientClosedException">If client was manually closed.</exception>
*/
private IGridClientFuture <T> MakeJettyRequest <T>(Guid destNodeId, IDictionary <String, Object> args, Func <Object, T> converter)
{
Dbg.Assert(args != null);
Dbg.Assert(args.ContainsKey("cmd"));
if (destNodeId != null && destNodeId != Guid.Empty)
{
args.Add("destId", destNodeId.ToString());
}
var fut = new GridClientFuture <T>();
fut.DoneConverter = converter;
busyLock.AcquireReaderLock(Timeout.Infinite);
try {
if (closed)
{
throw new GridClientConnectionResetException("Failed to perform request (connection was closed" +
" before request is sent): " + ServerAddress);
}
lock (pendingReqs) {
pendingReqs.Add(fut);
}
U.Async(() => {
try {
OnResponse(args, fut, LoadString(args, sessionToken));
}
catch (Exception e) {
fut.Fail(() => {
throw new GridClientException(e.Message, e);
});
}
});
return(fut);
}
finally {
busyLock.ReleaseReaderLock();
}
}
/**
* <summary>
* Handle server response.</summary>
*
* <param name="args">Parameters map.</param>
* <param name="fut">Future to use.</param>
* <param name="str">Downloaded string response.</param>
*/
private void OnResponse(IDictionary <String, Object> args, GridClientFuture fut, String str)
{
try {
JavaScriptSerializer s = new JavaScriptSerializer();
// Parse json response.
var json = (IDictionary <String, Object>)s.Deserialize(str, typeof(Object));
// Recover status.
GridClientResponseStatus statusCode = GridClientResponse.FindByCode((int)json["successStatus"]);
// Retry with credentials, if authentication failed.
if (statusCode == GridClientResponseStatus.AuthFailure)
{
// Reset session token.
sessionToken = null;
// Re-send request with credentials and without session token.
str = LoadString(args, null);
// Parse json response.
json = (IDictionary <String, Object>)s.Deserialize(str, typeof(IDictionary <String, Object>));
// Recover status.
statusCode = GridClientResponse.FindByCode((int)json["successStatus"]);
}
Object o;
String errorMsg = null;
if (json.TryGetValue("error", out o))
{
errorMsg = (String)o;
}
if (String.IsNullOrEmpty(errorMsg))
{
errorMsg = "Unknown server error";
}
if (statusCode == GridClientResponseStatus.AuthFailure)
{
// Close this connection.
Close(false);
throw new GridClientAuthenticationException("Client authentication failed " +
"[clientId=" + ClientId + ", srvAddr=" + ServerAddress + ", errMsg=" + errorMsg + ']');
}
if (statusCode == GridClientResponseStatus.Failed)
{
throw new GridClientException(errorMsg);
}
if (statusCode == GridClientResponseStatus.AuthorizationFailure)
{
throw new GridClientException("Client authorization failed: " + errorMsg);
}
if (statusCode != GridClientResponseStatus.Success)
{
throw new GridClientException("Unsupported response status code: " + statusCode);
}
// Update session token only on success and auth-failed responses.
if (json.TryGetValue("sessionToken", out o))
{
sessionToken = o == null ? null : o.ToString();
}
fut.Done(json["response"]);
}
catch (Exception e) {
fut.Fail(() => {
throw new GridClientException(e.Message, e);
});
}
finally {
lock (pendingReqs) {
pendingReqs.Remove(fut);
}
}
}
