/// <summary>
/// Check if the current message will cause deadlock.
/// Throw DeadlockException if yes.
/// </summary>
/// <param name="message">Message to analyze</param>
private void CheckDeadlock(Message message)
{
object obj = message.GetApplicationHeader(RequestContext.CALL_CHAIN_REQUEST_CONTEXT_HEADER);
if (obj == null)
{
return; // first call in a chain
}
var prevChain = ((IList)obj);
ActivationId nextActivationId = message.TargetActivation;
// check if the target activation already appears in the call chain.
foreach (object invocationObj in prevChain)
{
var prevId = ((RequestInvocationHistory)invocationObj).ActivationId;
if (!prevId.Equals(nextActivationId) || catalog.IsReentrantGrain(nextActivationId))
{
continue;
}
var newChain = new List <RequestInvocationHistory>();
newChain.AddRange(prevChain.Cast <RequestInvocationHistory>());
newChain.Add(new RequestInvocationHistory(message));
throw new DeadlockException(newChain.Select(req =>
new Tuple <GrainId, int, int>(req.GrainId, req.InterfaceId, req.MethodId)).ToList());
}
}
