public async Task<Result<MasterElectionState>> GetRoleAsync(OperationContext context)
{
var r = await UpdateRoleAsync(context, tryUpdateLease: TryCreateOrExtendLease);
if (r.Succeeded)
{
_lastElection = r.Value;
}
return r;
}
public async Task<Result<Role>> ReleaseRoleIfNecessaryAsync(OperationContext context, bool shuttingDown = false)
{
if (!_configuration.IsMasterEligible)
{
return Result.Success<Role>(Role.Worker);
}
var r = await UpdateRoleAsync(context, tryUpdateLease: TryReleaseLeaseIfHeld).AsAsync(s => s.Role);
if (r.Succeeded)
{
// We don't know who the master is any more
_lastElection = new MasterElectionState(Master: default, Role: r.Value);
private static void Check(MasterElectionState state, Role role, MachineLocation?master)
{
if (master is null)
{
state.Master.IsValid.Should().BeFalse($"Expected master to be invalid but found {state.Master}");
}
else
{
state.Master.Should().BeEquivalentTo(master.Value);
}
state.Role.Should().Be(role);
}
