private RaftHttpCluster(HttpClusterMemberConfiguration config, IServiceProvider dependencies, out MemberCollectionBuilder members, Func <Action <HttpClusterMemberConfiguration, string>, IDisposable> configTracker)
: base(config, out members)
{
openConnectionForEachRequest = config.OpenConnectionForEachRequest;
allowedNetworks = config.AllowedNetworks.ToImmutableHashSet();
metadata = new MemberMetadata(config.Metadata);
requestTimeout = config.RequestTimeout;
raftRpcTimeout = config.RpcTimeout;
connectTimeout = TimeSpan.FromMilliseconds(config.LowerElectionTimeout);
duplicationDetector = new DuplicateRequestDetector(config.RequestJournal);
clientHandlerName = config.ClientHandlerName;
protocolVersion = config.ProtocolVersion;
// dependencies
configurator = dependencies.GetService <IClusterMemberLifetime>();
messageHandlers = ImmutableList.CreateRange(dependencies.GetServices <IInputChannel>());
AuditTrail = dependencies.GetService <IPersistentState>() ?? new ConsensusOnlyState();
httpHandlerFactory = dependencies.GetService <IHttpMessageHandlerFactory>();
Logger = dependencies.GetRequiredService <ILoggerFactory>().CreateLogger(GetType());
Metrics = dependencies.GetService <MetricsCollector>();
bufferingOptions = dependencies.GetBufferingOptions();
discoveryService = dependencies.GetService <IMemberDiscoveryService>();
// track changes in configuration, do not track membership if discovery service is enabled
configurationTracker = configTracker(discoveryService is null ? ConfigurationAndMembershipChanged : ConfigurationChanged);
}
private async void ConfigurationChanged(HttpClusterMemberConfiguration configuration, string name)
{
metadata = new MemberMetadata(configuration.Metadata);
allowedNetworks = configuration.AllowedNetworks.ToImmutableHashSet();
await ChangeMembersAsync((in MemberCollectionBuilder members) =>
{
var existingMembers = new HashSet <Uri>();
// remove members
foreach (var holder in members)
{
Debug.Assert(holder.Member.BaseAddress is not null);
if (configuration.Members.Contains(holder.Member.BaseAddress))
{
existingMembers.Add(holder.Member.BaseAddress);
}
else
{
using var member = holder.Remove();
MemberRemoved?.Invoke(this, member);
member.CancelPendingRequests();
}
}
// add new members
foreach (var memberUri in configuration.Members)
{
if (!existingMembers.Contains(memberUri))
{
var member = CreateMember(memberUri);
members.Add(member);
MemberAdded?.Invoke(this, member);
}
}
existingMembers.Clear();
}).ConfigureAwait(false);