/// <summary>
/// Copies the shardlet using the shard set driver for the shard.
/// </summary>
/// <param name="sourceShard">The current shard.</param>
/// <param name="destinationShard">The shard.</param>
/// <param name="shardingKey">The sharding key.</param>
/// <param name="uniqueProcessID">The unique process identifier.</param>
public virtual void CopyShardlet(ShardBase sourceShard, ShardBase destinationShard, string shardingKey,
Guid uniqueProcessID)
{
var driver = GetShardSetDriver();
driver.CopyShardlet(sourceShard, destinationShard, this, shardingKey, uniqueProcessID);
}
/// <summary>
/// Deletes the shardlet using the shard set driver for the shard.
/// </summary>
/// <param name="shard">The shard.</param>
/// <param name="shardingKey">The sharding key.</param>
public virtual void DeleteShardlet(ShardBase shard, string shardingKey)
{
var driver = GetShardSetDriver();
driver.DeleteShardlet(shard, this, shardingKey);
}
/// <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;
}
}
