public IFrameHandler CreateFrameHandler()
{
IProtocol p = Protocols.DefaultProtocol;
return(p.CreateFrameHandler(Endpoint,
SocketFactory,
RequestedConnectionTimeout));
}
protected virtual IConnection FollowRedirectChain
(int maxRedirects,
IDictionary connectionAttempts,
IDictionary connectionErrors,
ref AmqpTcpEndpoint[] mostRecentKnownHosts,
AmqpTcpEndpoint endpoint)
{
AmqpTcpEndpoint candidate = endpoint;
try {
while (true)
{
int attemptCount =
connectionAttempts.Contains(candidate)
? (int)connectionAttempts[candidate]
: 0;
connectionAttempts[candidate] = attemptCount + 1;
bool insist = attemptCount >= maxRedirects;
try {
IProtocol p = candidate.Protocol;
IFrameHandler fh = p.CreateFrameHandler(candidate);
// At this point, we may be able to create
// and fully open a successful connection,
// in which case we're done, and the
// connection should be returned.
return(p.CreateConnection(m_parameters, insist, fh));
} catch (RedirectException re) {
if (insist)
{
// We've been redirected, but we insisted that
// we shouldn't be redirected! Well-behaved
// brokers should never do this.
string message = string.Format("Server {0} ignored 'insist' flag, redirecting us to {1}",
candidate,
re.Host);
throw new ProtocolViolationException(message);
}
else
{
// We've been redirected. Follow this new link
// in the chain, by setting
// mostRecentKnownHosts (in case the chain
// runs out), and updating candidate for the
// next time round the loop.
connectionErrors[candidate] = re;
mostRecentKnownHosts = re.KnownHosts;
candidate = re.Host;
}
}
}
} catch (Exception e) {
connectionErrors[candidate] = e;
return(null);
}
}
