private void OnStateChange(object sender, NodeLifecycleState state)
{
if (!(sender is INodeLifecycleManager evictionCandidate))
{
return;
}
if (!_evictionPairs.TryGetValue(evictionCandidate.ManagedNode.IdHash, out EvictionPair evictionPair))
{
return;
}
if (state == NodeLifecycleState.Active)
{
//survived eviction
if (_logger.IsTrace)
{
_logger.Trace($"Survived eviction process, evictionCandidate: {evictionCandidate.ManagedNode}, replacementCandidate: {evictionPair.ReplacementCandidate.ManagedNode}");
}
evictionPair.ReplacementCandidate.LostEvictionProcess();
CloseEvictionProcess(evictionCandidate);
}
else if (state == NodeLifecycleState.Unreachable)
{
//lost eviction, being replaced in nodeTable
_nodeTable.ReplaceNode(evictionCandidate.ManagedNode, evictionPair.ReplacementCandidate.ManagedNode);
if (_logger.IsTrace)
{
_logger.Trace($"Lost eviction process, evictionCandidate: {evictionCandidate.ManagedNode}, replacementCandidate: {evictionPair.ReplacementCandidate.ManagedNode}");
}
CloseEvictionProcess(evictionCandidate);
}
}
private void UpdateState(NodeLifecycleState newState)
{
if (newState == NodeLifecycleState.New)
{
//if node is just discovered we send ping to confirm it is active
SendPing();
}
else if (newState == NodeLifecycleState.Active)
{
//TODO && !ManagedNode.IsDicoveryNode - should we exclude discovery nodes
//received pong first time
if (State == NodeLifecycleState.New)
{
var result = _nodeTable.AddNode(ManagedNode);
if (result.ResultType == NodeAddResultType.Full)
{
var evictionCandidate = _discoveryManager.GetNodeLifecycleManager(result.EvictionCandidate.Node);
if (evictionCandidate != null)
{
_evictionManager.StartEvictionProcess(evictionCandidate, this);
}
}
}
}
else if (newState == NodeLifecycleState.EvictCandidate)
{
SendPing();
}
State = newState;
OnStateChanged?.Invoke(this, State);
}
private void UpdateState(NodeLifecycleState newState)
{
if (newState == NodeLifecycleState.New)
{
//if node is just discovered we send ping to confirm it is active
#pragma warning disable 4014
SendPingAsync();
#pragma warning restore 4014
}
else if (newState == NodeLifecycleState.Active)
{
//TODO && !ManagedNode.IsDiscoveryNode - should we exclude discovery nodes
//received pong first time
if (State == NodeLifecycleState.New)
{
NodeAddResult result = _nodeTable.AddNode(ManagedNode);
if (result.ResultType == NodeAddResultType.Full && result.EvictionCandidate?.Node is not null)
{
INodeLifecycleManager?evictionCandidate = _discoveryManager.GetNodeLifecycleManager(result.EvictionCandidate.Node);
if (evictionCandidate != null)
{
_evictionManager.StartEvictionProcess(evictionCandidate, this);
}
}
}
}
else if (newState == NodeLifecycleState.EvictCandidate)
{
if (State == NodeLifecycleState.EvictCandidate)
{
throw new InvalidOperationException("Cannot start more than one eviction process on same node.");
}
if (DateTime.UtcNow - _lastPingSent > TimeSpan.FromSeconds(5))
{
#pragma warning disable 4014
SendPingAsync();
#pragma warning restore 4014
}
else
{
// TODO: this is very strange...?
// seems like we quickly send two state updates here since we do not return after invocation?
OnStateChanged?.Invoke(this, NodeLifecycleState.Active);
}
}
State = newState;
OnStateChanged?.Invoke(this, State);
}
private void UpdateState(NodeLifecycleState newState)
{
if (newState == NodeLifecycleState.New)
{
//if node is just discovered we send ping to confirm it is active
SendPing();
}
else if (newState == NodeLifecycleState.Active)
{
//TODO && !ManagedNode.IsDiscoveryNode - should we exclude discovery nodes
//received pong first time
if (State == NodeLifecycleState.New)
{
NodeAddResult result = _nodeTable.AddNode(ManagedNode);
if (result.ResultType == NodeAddResultType.Full)
{
INodeLifecycleManager evictionCandidate = _discoveryManager.GetNodeLifecycleManager(result.EvictionCandidate.Node);
if (evictionCandidate != null)
{
_evictionManager.StartEvictionProcess(evictionCandidate, this);
}
}
}
}
else if (newState == NodeLifecycleState.EvictCandidate)
{
if (State == NodeLifecycleState.EvictCandidate)
{
throw new InvalidOperationException("Cannot start more than one eviction process on same node.");
}
if (DateTime.UtcNow - _lastPingSent > TimeSpan.FromSeconds(5))
{
SendPing();
}
else
{
OnStateChanged?.Invoke(this, NodeLifecycleState.Active);
}
}
State = newState;
OnStateChanged?.Invoke(this, State);
}
