protected GossipServiceBase(IPublisher bus,
IGossipSeedSource gossipSeedSource,
VNodeInfo nodeInfo,
TimeSpan gossipInterval,
TimeSpan allowedTimeDifference,
TimeSpan gossipTimeout,
TimeSpan deadMemberRemovalPeriod,
ITimeProvider timeProvider,
Func <MemberInfo[], MemberInfo> getNodeToGossipTo = null)
{
Ensure.NotNull(bus, "bus");
Ensure.NotNull(gossipSeedSource, "gossipSeedSource");
Ensure.NotNull(nodeInfo, "nodeInfo");
Ensure.NotNull(timeProvider, nameof(timeProvider));
_bus = bus;
_publishEnvelope = new PublishEnvelope(bus);
_gossipSeedSource = gossipSeedSource;
NodeInfo = nodeInfo;
GossipInterval = gossipInterval;
AllowedTimeDifference = allowedTimeDifference;
GossipTimeout = gossipTimeout;
DeadMemberRemovalPeriod = deadMemberRemovalPeriod;
_state = GossipState.Startup;
_timeProvider = timeProvider;
_getNodeToGossipTo = getNodeToGossipTo ?? GetNodeToGossipTo;
}
public void Handle(GossipMessage.RetrieveGossipSeedSources message)
{
_state = GossipState.RetrievingGossipSeeds;
try {
_gossipSeedSource.BeginGetHostEndpoints(OnGotGossipSeedSources, null);
} catch (Exception ex) {
Log.Error(ex, "Error while retrieving cluster members through DNS.");
_bus.Publish(TimerMessage.Schedule.Create(DnsRetryTimeout, _publishEnvelope,
new GossipMessage.RetrieveGossipSeedSources()));
}
}
public void Handle(GossipMessage.GotGossipSeedSources message)
{
var now = DateTime.UtcNow;
var dnsCluster = new ClusterInfo(
message.GossipSeeds.Select(x => MemberInfo.ForManager(Guid.Empty, now, true, x, x)).ToArray());
var oldCluster = _cluster;
_cluster = MergeClusters(_cluster, dnsCluster, null, x => x);
LogClusterChange(oldCluster, _cluster, null);
_state = GossipState.Working;
Handle(new GossipMessage.Gossip(0)); // start gossiping
}
protected GossipServiceBase(IPublisher bus,
IGossipSeedSource gossipSeedSource,
VNodeInfo nodeInfo)
{
Ensure.NotNull(bus, "bus");
Ensure.NotNull(gossipSeedSource, "gossipSeedSource");
Ensure.NotNull(nodeInfo, "nodeInfo");
_bus = bus;
_publishEnvelope = new PublishEnvelope(bus);
_gossipSeedSource = gossipSeedSource;
NodeInfo = nodeInfo;
_state = GossipState.Startup;
}
public void Handle(GossipMessage.GotGossipSeedSources message)
{
var now = _timeProvider.UtcNow;
var dnsCluster = new ClusterInfo(
message.GossipSeeds.Select(x => MemberInfo.ForManager(Guid.Empty, now, true, x, x)).ToArray());
var oldCluster = _cluster;
_cluster = MergeClusters(_cluster, dnsCluster, null, x => x, _timeProvider.UtcNow, NodeInfo, CurrentLeader,
AllowedTimeDifference, DeadMemberRemovalPeriod);
LogClusterChange(oldCluster, _cluster, null);
_state = GossipState.Working;
Handle(new GossipMessage.Gossip(0));
}
protected GossipServiceBase(IPublisher bus,
IGossipSeedSource gossipSeedSource,
VNodeInfo nodeInfo,
TimeSpan gossipInterval,
TimeSpan allowedTimeDifference)
{
Ensure.NotNull(bus, "bus");
Ensure.NotNull(gossipSeedSource, "gossipSeedSource");
Ensure.NotNull(nodeInfo, "nodeInfo");
_bus = bus;
_publishEnvelope = new PublishEnvelope(bus);
_gossipSeedSource = gossipSeedSource;
NodeInfo = nodeInfo;
GossipInterval = gossipInterval;
AllowedTimeDifference = allowedTimeDifference;
_state = GossipState.Startup;
}
public Join(GossipState state, Member member)
{
State = state;
Member = member;
}
private bool HasTimedOut(GossipState state) => unchecked (Environment.TickCount - state.CreationTickCount) >= Configuration.AntiEntropyIdleTimeout;
public NewMember(GossipState state, Member member)
{
State = state;
Member = member;
}
public RingRequest(ulong term, GossipState state, Member target)
{
Term = term;
State = state;
Target = target;
}
public Ping(ulong term, GossipState state)
{
Term = term;
State = state;
}
public Ack(ulong term, GossipState state)
{
Term = term;
State = state;
}
private bool HasTimedOut(GossipState state) => unchecked (TransactionalTickCount.Value - state.CreationTickCount) >= Configuration.AntiEntropyIdleTimeout;
