public LeaderElection(ILogger <LeaderElection> logger, ElectionMessageProducer producer, LeaderElectionOptions options)
{
_logger = logger;
_producer = producer;
_options = options;
_cts = new CancellationTokenSource();
}
public static IActiveMqBuilder AddLeaderElection(this IActiveMqBuilder builder, LeaderElectionOptions options = null)
{
options ??= new LeaderElectionOptions();
if (string.IsNullOrWhiteSpace(options.ElectionAddress))
{
throw new ArgumentException($"{nameof(LeaderElectionOptions.ElectionAddress)} must be provided.", nameof(LeaderElectionOptions.ElectionAddress));
}
if (options.ElectionMessageInterval <= TimeSpan.Zero)
{
throw new ArgumentException($"{nameof(LeaderElectionOptions.ElectionMessageInterval)} must greater than 0.", nameof(LeaderElectionOptions.ElectionAddress));
}
if (options.HandOverAfterMissedElectionMessages <= 0)
{
throw new ArgumentException($"{nameof(LeaderElectionOptions.HandOverAfterMissedElectionMessages)} must greater than 0.", nameof(LeaderElectionOptions.ElectionAddress));
}
builder.AddConsumer(options.ElectionAddress, RoutingType.Anycast, async(message, consumer, serviceProvider, cancellationToken) =>
{
var leaderElection = serviceProvider.GetService <LeaderElection>();
leaderElection.OnElectionMessage();
await consumer.AcceptAsync(message).ConfigureAwait(false);
});
builder.AddProducer <ElectionMessageProducer>(options.ElectionAddress, RoutingType.Anycast, ServiceLifetime.Singleton);
builder.Services.AddSingleton(provider => ActivatorUtilities.CreateInstance <LeaderElection>(provider, options));
builder.Services.AddSingleton <ILeaderElection>(provider => provider.GetRequiredService <LeaderElection>());
return(builder);
}