public IList <string> PotentialShardsFor(ShardRequestData requestData)
{
if (requestData.EntityType == typeof(Company))
{
// You can try to limit the potential shards based on the query
}
return(null);
}
public override IList <string> PotentialShardsFor(ShardRequestData requestData, List <string> potentialShardIds)
{
if (potentialShardIds == null)
{
return(null);
}
return(new[] { potentialShardIds.Last() });
}
public override IList <string> PotentialShardsFor(ShardRequestData requestData)
{
if (requestData.Keys.Contains("Edin/patients/6"))
{
return new List <string> {
"Ayende"
}
}
;
return(base.PotentialShardsFor(requestData));
}
}
/// <summary>
/// Selects the shard ids appropriate for the specified data.
/// </summary><returns>Return a list of shards ids that will be search. Returning null means search all shards.</returns>
public virtual IList<string> PotentialShardsFor(ShardRequestData requestData)
{
if (requestData.Keys.Count == 0) // we are only optimized for keys
return null;
// we are looking for search by key, let us see if we can narrow it down by using the
// embedded shard id.
var list = new List<string>();
foreach (var key in requestData.Keys)
{
var start = key.IndexOf(shardStrategy.Conventions.IdentityPartsSeparator, StringComparison.OrdinalIgnoreCase);
if (start == -1)
return null; // if we couldn't figure it out, select from all
var maybeShardId = key.Substring(0, start);
if (ShardIds.Any(x => string.Equals(maybeShardId, x, StringComparison.OrdinalIgnoreCase)))
list.Add(maybeShardId);
else
return null; // we couldn't find it there, select from all
}
return list.ToArray();
}
public IList <string> PotentialShardsFor(ShardRequestData requestData)
{
if (requestData.EntityType == typeof(User))
{
return new[] { "Users" }
}
;
if (requestData.EntityType == typeof(Blog))
{
return new[] { "Blogs" }
}
;
if (requestData.EntityType == typeof(Post) ||
requestData.EntityType == typeof(TotalVotesUp.ReduceResult) ||
requestData.EntityType == typeof(TotalPostsPerDay.ReduceResult)
)
{
return(Enumerable.Range(0, numberOfShardsForPosts).Select(i => "Posts" + (i + 1).ToString("D2")).ToArray());
}
throw new ArgumentException("Cannot get shard id for '" + requestData.EntityType + "' because it is not a User, Blog or Post");
}
}
}
public IList <string> PotentialShardsFor(ShardRequestData requestData)
{
// for future use
throw new NotImplementedException();
}
public IList<string> PotentialShardsFor(ShardRequestData requestData)
{
// for future use
throw new NotImplementedException();
}
public IList <string> PotentialShardsFor(ShardRequestData requestData)
{
return(new[] { "Shard0", "Shard1", "Shard2" });
}
