public override async Task <Empty> ReleaseLock(Lock request, ServerCallContext context)
{
var currentLock = await _expiringDataStore.Get <Lock>(request.ResourceId);
if (currentLock.IsNullOrDefault())
{
throw new RpcException(new Status(StatusCode.NotFound, $"No lock found for resource: {request.ResourceId}"), $"No lock found for resource: {request.ResourceId}");
}
if (!currentLock.LockId.Equals(request.LockId, StringComparison.OrdinalIgnoreCase))
{
throw new RpcException(new Status(StatusCode.Unavailable, $"Unable to release lock, the lockId: {request.LockId} is incorrect."),
$"Unable to release lock, the lockId: {request.LockId} is incorrect.");
}
if (!await _lockProvider.ReleaseLock(new LockToken(true, currentLock.LockId, currentLock.ResourceId, currentLock.Expiry.ToDateTime())))
{
throw new RpcException(new Status(StatusCode.Unavailable, "Unable to release lock."), "Unable to release lock.");
}
await _expiringDataStore.Delete <Lock>(currentLock.ResourceId);
currentLock.Expiry = DateTime.UtcNow.AddSeconds(5).ToTimestamp();
currentLock.Released = false;
await _producer.ProduceAsync(currentLock, request.ResourceId);
return(new Empty());
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken) =>
await _dataStore.ExpiredKeys
.Retry()
.Select(k => k.Split("/"))
.Where(k => k[0].Equals("locks"))
.ForEachAsync(async expiredLock =>
{
var lockKey = expiredLock[1];
var lockValue = await _dataStore.Get <Lock>(lockKey);
if (!lockValue.IsNotNullOrDefault())
{
return;
}
await _lockProducer.ProduceAsync(lockValue, lockValue.ResourceId);
await _dataStore.Delete <Lock>(lockKey);
Console.WriteLine($"Expired {lockKey}.");
},
stoppingToken);