private void storeDecision(ProposalDecision decision, ReplicaState state)
{
if (!state.DecisionsBySlotId.ContainsKey(decision.SlotNumber))
{
state.DecisionsBySlotId.Add(decision.SlotNumber, decision.Command);
}
}
private ClientRequest cleanProposal(ProposalDecision decision, ReplicaState state)
{
ClientRequest request = state.ProposalsRequestsBySlotId[decision.SlotNumber];
state.ProposalsRequestsBySlotId.Remove(decision.SlotNumber);
return(request);
}
public void Execute(MessageStrategyExecuteArg <IMessage> obj)
{
if (!(obj.Message is ProposalDecision))
{
throw new MessageStrategyException("This strategy shouldn't be invoked with this message type");
}
ProposalDecision decision = obj.Message as ProposalDecision;
ReplicaState state = obj.RoleState as ReplicaState;
storeDecision(decision, state);
if (proposalHasBeenApproved(decision, state))
{
ClientRequest clientRequest = cleanProposal(decision, state);
OnDecisionApproved?.Invoke(this, clientRequest);
}
else
{
ClientRequest clientRequest = null;
if (replicaIsProposalEmitter(decision, state))
{
temporaryRemoveClientPendingResponseUntilNextRetry(decision, state);
clientRequest = cleanProposal(decision, state);
}
OnDecisionRejected?.Invoke(this, clientRequest);
}
}
private void notifyAllReplicasOfElectedValue(VoteResponse message)
{
ProposalDecision decision = new ProposalDecision(message);
decision.Command = this.currentState.ProposalsBySlotId[message.SlotNumber];
foreach (MessageSender replica in this.currentState.Replicas)
{
this.MessageBroker.SendMessage(replica.UniqueId, decision);
}
}
private bool proposalHasBeenApproved(ProposalDecision decision, ReplicaState state)
{
return(state.ProposalsRequestsBySlotId.ContainsKey(decision.SlotNumber) &&
state.DecisionsBySlotId.ContainsKey(decision.SlotNumber) &&
state.ProposalsRequestsBySlotId[decision.SlotNumber].Command == state.DecisionsBySlotId[decision.SlotNumber]);
}
private void temporaryRemoveClientPendingResponseUntilNextRetry(ProposalDecision decision, ReplicaState state)
{
state.ClientsPendingResponseBySlotId.Remove(decision.SlotNumber);
}
private bool replicaIsProposalEmitter(ProposalDecision decision, ReplicaState state)
{
return(state.ProposalsRequestsBySlotId.ContainsKey(decision.SlotNumber));
}
