public DistributedDataContext GetContext(byte bucket)
{
var ctx = new DistributedDataContext(_shards[bucket]);
ctx.Configuration.AutoDetectChangesEnabled = false;
ctx.Configuration.ProxyCreationEnabled = false;
return(ctx);
}
private void CheckShardsAndSetEpoch(DbMigrationsConfiguration config, bool updateMigrations) //<DistributedDataContext>
{
var sortedShards = _shards.OrderBy(kvp => kvp.Key).ToList();
var numberOfShards = sortedShards.Count;
if (numberOfShards > 254)
{
throw new ArgumentException("Too many shards!");
}
NumberOfShards = (byte)numberOfShards;
_writableShards = _shards.Keys.Except(_readOnlyShards).ToList();
if (_writableShards.Count == 0)
{
throw new ApplicationException("No writable shards");
}
// one based
var i = 0;
foreach (var keyValuePair in sortedShards)
{
if (i != keyValuePair.Key)
{
// TODO unit test
throw new ApplicationException("Wrong numbering of shards");
}
i++;
}
foreach (var key in sortedShards.Select(keyValuePair => keyValuePair.Key))
{
if (updateMigrations)
{
DistributedDataContext.UpdateAutoMigrations(_shards[key], config);
}
//using (var ctx = GetContext(key)) {
// var two = ctx.Database.SqlQuery<int>("SELECT 1+1").SingleOrDefault(); // check DB engine is working
// if (two != 2) throw new ApplicationException("Shard " + key + " doesn't work");
//}
}
}
