internal static ImmutableHashSet <RoleLeaderChanged> DiffRolesLeader(Gossip oldGossip, Gossip newGossip, UniqueAddress selfUniqueAddress)
{
return(InternalDiffRolesLeader(oldGossip, newGossip, selfUniqueAddress).ToImmutableHashSet());
}
/// <summary>
/// TBD
/// </summary>
/// <param name="from">TBD</param>
public HeartbeatRsp(UniqueAddress from)
{
From = from;
}
/// <summary>
/// Check to see if a node with the given address exists inside the heartbeat sender state.
/// </summary>
/// <param name="node">The node to check</param>
/// <returns><c>true</c> if the heartbeat sender is already aware of this node. <c>false</c> otherwise.</returns>
public bool Contains(UniqueAddress node)
{
return(Ring.Nodes.Contains(node));
}
public UniqueAddress Leader(UniqueAddress selfUniqueAddress)
{
return(LeaderOf(_members, selfUniqueAddress));
}
public bool HasMember(UniqueAddress node)
{
return(_membersMap.Value.ContainsKey(node));
}
/// <summary>
/// TBD
/// </summary>
/// <param name="node">TBD</param>
/// <returns>TBD</returns>
public ClusterHeartbeatSenderState ReachableMember(UniqueAddress node)
{
return(MembershipChange(Ring.Copy(unreachable: Ring.Unreachable.Remove(node))));
}
/// <summary>
/// Has this Gossip been seen by this node.
/// </summary>
public bool SeenByNode(UniqueAddress node)
{
return(_overview.Seen.Contains(node));
}
/// <summary>
/// TBD
/// </summary>
/// <param name="observer">TBD</param>
/// <param name="subject">TBD</param>
/// <returns>TBD</returns>
public Reachability Terminated(UniqueAddress observer, UniqueAddress subject)
{
return(Change(observer, subject, ReachabilityStatus.Terminated));
}
long CurrentVersion(UniqueAddress observer)
{
long version;
return(_versions.TryGetValue(observer, out version) ? version : 0);
}
public HeartbeatNodeRing(UniqueAddress selfAddress, IEnumerable <UniqueAddress> nodes,
int monitoredByNumberOfNodes)
: this(selfAddress, ImmutableSortedSet.Create(nodes.ToArray()), monitoredByNumberOfNodes)
{
}
/// <summary>
/// TBD
/// </summary>
/// <param name="observer">TBD</param>
/// <param name="subject">TBD</param>
/// <returns>TBD</returns>
public Reachability Reachable(UniqueAddress observer, UniqueAddress subject)
{
return(Change(observer, subject, ReachabilityStatus.Reachable));
}
private void DoHeartbeatRsp(UniqueAddress from)
{
_log.Debug("Cluster Node [{0}] - Heartbeat response from [{1}]", _cluster.SelfAddress, from.Address);
_state = _state.HeartbeatRsp(from);
}
internal static ImmutableList <SeenChanged> DiffSeen(Gossip oldGossip, Gossip newGossip, UniqueAddress selfUniqueAddress)
{
if (newGossip.Equals(oldGossip))
{
return(ImmutableList <SeenChanged> .Empty);
}
var newConvergence = newGossip.Convergence(selfUniqueAddress);
var newSeenBy = newGossip.SeenBy;
if (!newConvergence.Equals(oldGossip.Convergence(selfUniqueAddress)) || !newSeenBy.SequenceEqual(oldGossip.SeenBy))
{
return(ImmutableList.Create(new SeenChanged(newConvergence, newSeenBy.Select(s => s.Address).ToImmutableHashSet())));
}
return(ImmutableList <SeenChanged> .Empty);
}
private static IEnumerable <RoleLeaderChanged> InternalDiffRolesLeader(Gossip oldGossip, Gossip newGossip, UniqueAddress selfUniqueAddress)
{
foreach (var role in oldGossip.AllRoles.Union(newGossip.AllRoles))
{
var newLeader = newGossip.RoleLeader(role, selfUniqueAddress);
if (newLeader == null && oldGossip.RoleLeader(role, selfUniqueAddress) != null)
{
yield return(new RoleLeaderChanged(role, null));
}
if (newLeader != null && !newLeader.Equals(oldGossip.RoleLeader(role, selfUniqueAddress)))
{
yield return(new RoleLeaderChanged(role, newLeader.Address));
}
}
}
/// <summary>
/// Creates a new <see cref="Member"/>.
/// </summary>
/// <param name="uniqueAddress">The address of the member.</param>
/// <param name="upNumber">The upNumber of the member, as assigned by the leader at the time the node joined the cluster.</param>
/// <param name="status">The status of this member.</param>
/// <param name="roles">The roles for this member. Can be empty.</param>
/// <param name="appVersion">Application version</param>
/// <returns>A new member instance.</returns>
internal static Member Create(UniqueAddress uniqueAddress, int upNumber, MemberStatus status, ImmutableHashSet <string> roles, AppVersion appVersion)
{
return(new Member(uniqueAddress, upNumber, status, roles, appVersion));
}
long NextVersion(UniqueAddress observer)
{
return(CurrentVersion(observer) + 1);
}
public HeartbeatRsp(UniqueAddress from, long sequenceNr, long creationTimeNanos)
{
From = from;
SequenceNr = sequenceNr;
CreationTimeNanos = creationTimeNanos;
}
/// <summary>
/// TBD
/// </summary>
/// <param name="node">TBD</param>
/// <returns>TBD</returns>
public bool IsReachable(UniqueAddress node)
{
return(IsAllReachable || !AllUnreachableOrTerminated.Contains(node));
}
/// <summary>
/// Marks the gossip as seen by only this node (address) by replacing the 'gossip.overview.seen'
/// </summary>
public Gossip OnlySeen(UniqueAddress node)
{
return(Copy(overview: _overview.Copy(seen: ImmutableHashSet.Create(node))));
}
/// <summary>
/// TBD
/// </summary>
/// <param name="observer">TBD</param>
/// <param name="subject">TBD</param>
/// <returns>TBD</returns>
public bool IsReachable(UniqueAddress observer, UniqueAddress subject)
{
return(Status(observer, subject) == ReachabilityStatus.Reachable);
}
public bool IsLeader(UniqueAddress node, UniqueAddress selfUniqueAddress)
{
return(Leader(selfUniqueAddress) == node && node != null);
}
internal Member(UniqueAddress uniqueAddress, int upNumber, MemberStatus status, IEnumerable <string> roles, AppVersion appVersion)
: this(uniqueAddress, upNumber, status, roles.ToImmutableHashSet(), appVersion)
{
}
public Member GetMember(UniqueAddress node)
{
return(_membersMap.Value.GetOrElse(node,
Member.Removed(node))); // placeholder for removed member
}
/// <inheritdoc cref="object.GetHashCode"/>
public override int GetHashCode()
{
return(UniqueAddress.GetHashCode());
}
public GossipStatus(UniqueAddress from, VectorClock version)
{
_from = from;
_version = version;
}
/// <summary>
/// TBD
/// </summary>
/// <param name="uniqueAddress">TBD</param>
/// <param name="roles">TBD</param>
/// <param name="appVersion">Application version</param>
/// <returns>TBD</returns>
internal static Member Create(UniqueAddress uniqueAddress, ImmutableHashSet <string> roles, AppVersion appVersion)
{
return(new Member(uniqueAddress, int.MaxValue, MemberStatus.Joining, roles, appVersion));
}
/// <summary>
/// TBD
/// </summary>
/// <param name="from">TBD</param>
public ExpectedFirstHeartbeat(UniqueAddress from)
{
From = from;
}
/// <summary>
/// TBD
/// </summary>
/// <param name="node">TBD</param>
/// <returns>TBD</returns>
internal static Member Removed(UniqueAddress node)
{
return(new Member(node, int.MaxValue, MemberStatus.Removed, ImmutableHashSet.Create <string>(), Util.AppVersion.Zero));
}
/// <summary>
/// Adds a new <see cref="UniqueAddress"/> to the heartbeat sender's state.
/// </summary>
/// <param name="node">The node to add.</param>
/// <returns>An updated copy of the state now including this member.</returns>
public ClusterHeartbeatSenderState AddMember(UniqueAddress node)
{
return(MembershipChange(Ring + node));
}
internal static ImmutableList <LeaderChanged> DiffLeader(Gossip oldGossip, Gossip newGossip, UniqueAddress selfUniqueAddress)
{
var newLeader = newGossip.Leader(selfUniqueAddress);
if ((newLeader == null && oldGossip.Leader(selfUniqueAddress) == null) ||
newLeader != null && newLeader.Equals(oldGossip.Leader(selfUniqueAddress)))
{
return(ImmutableList <LeaderChanged> .Empty);
}
return(ImmutableList.Create(newLeader == null
? new LeaderChanged(null)
: new LeaderChanged(newLeader.Address)));
}
