private static IShardSetConnectionDriver GetShardSetConnectionDriver(string shardSetName)
{
return(ScaleOutShardletManager.GetManager().GetShardletConnectionDriver(shardSetName));
}
/// <summary>
/// Moves to shard.
/// </summary>
/// <param name="shard">The shard to move the ShardLet data to.</param>
/// <param name="pin">if set to <c>true</c> add the shard to the pinned shard list.</param>
/// <param name="deleteOnMove">if set to <c>true</c> delete the Shardlet data from the existing Shard after move.</param>
/// <param name="uniqueProcessID">A unique process identifier that can be set to maintain state between moves.</param>
/// <param name="queueRequest">if set to <c>true</c> queue the shard move rather than executing it immediately.</param>
public void MoveToShard(ShardBase shard, bool pin, bool deleteOnMove, Guid uniqueProcessID,
bool queueRequest = false)
{
if (queueRequest)
{
var request =
new ShardletMoveRequest
{
DestinationCatalog = shard.Catalog,
DestinationServerInstanceName = shard.ServerInstanceName,
SourceCatalog = Catalog,
SourceServerInstanceName = ServerInstanceName,
DistributionKey = DistributionKey,
ShardingKey = ShardingKey,
ShardSetName = ShardSetName,
DeleteOnMove = deleteOnMove,
UniqueProcessID = uniqueProcessID,
Pin = pin
};
request.Save();
return;
}
var shardSetConnectionDriver = ScaleOutShardletManager.GetManager().GetShardletConnectionDriver(ShardSetName);
try
{
// change the state to read only in the map and update th epin status
Status = ShardletStatus.Moving;
Pinned = pin;
shardSetConnectionDriver.PublishShardlet(this);
// terminate all existing connections
shardSetConnectionDriver.TerminateConnections(this);
// copy the shardlet data
var shardSetConfig = ShardSetConfig.LoadCurrent(ShardSetName);
var currentShard =
new RangeShard
{
Catalog = Catalog,
ServerInstanceName = ServerInstanceName,
};
shardSetConfig.CopyShardlet(currentShard, shard, ShardingKey, uniqueProcessID);
// update the status and set the new catalog and instance in the shard map
Catalog = shard.Catalog;
ServerInstanceName = shard.ServerInstanceName;
Status = ShardletStatus.Active;
shardSetConnectionDriver.PublishShardlet(this);
if (deleteOnMove)
{
shardSetConfig.DeleteShardlet(currentShard, ShardingKey);
}
}
catch (Exception)
{
Status = ShardletStatus.Active;
shardSetConnectionDriver.PublishShardlet(this);
throw;
}
}
/// <summary>
/// Loads the specified shard set by name and distribution key.
/// </summary>
/// <param name="shardSetName">Name of the shard set.</param>
/// <param name="dataSetName">Name of the data set.</param>
/// <param name="uniqueValue">The unique value.</param>
/// <returns>Shardlet.</returns>
public static Shardlet Load(string shardSetName, string dataSetName, string uniqueValue)
{
return(ScaleOutShardletManager.GetManager().GetShardlet(shardSetName, dataSetName, uniqueValue));
}
/// <summary>
/// Loads the specified shard set by name and distribution key.
/// </summary>
/// <param name="shardSetName">Name of the shard set.</param>
/// <param name="distributionKey">The distribution key.</param>
/// <param name="isNew">if set to <c>true</c> [is new].</param>
/// <returns>Shardlet.</returns>
/// <remarks>
/// If the isNew flag is set, the Load method will not look in the pinned shard map for the existence
/// of the ShardLet.
/// </remarks>
public static Shardlet Load(string shardSetName, long distributionKey, bool isNew = false)
{
return(ScaleOutShardletManager.GetManager().GetShardlet(shardSetName, distributionKey, isNew));
}
/// <summary>
/// Disconnects the specified shardlet.
/// </summary>
/// <param name="shardlet">The shardlet.</param>
/// <param name="spid">The spid.</param>
public static void Disconnect(Shardlet shardlet, short spid)
{
ScaleOutShardletManager.GetManager().Disconnect(shardlet, spid);
}
/// <summary>
/// Loads the specified shard set by name and sharding key.
/// </summary>
/// <param name="shardSetName">Name of the shard set.</param>
/// <param name="shardingKey">The sharding key to distribute.</param>
/// <param name="spid">The spid of the connecting process.</param>
/// <returns>Shardlet.</returns>
public static Shardlet Load(string shardSetName, string shardingKey, short?spid = null)
{
return(ScaleOutShardletManager.GetManager().GetShardlet(shardSetName, shardingKey, spid));
}