/**
* Find data node by data source and logic table.
*
* @param dataSourceName data source name
* @param logicTableName logic table name
* @return data node
*/
public DataNode GetDataNode(string dataSourceName, string logicTableName)
{
TableRule tableRule = GetTableRule(logicTableName);
return(tableRule.ActualDataNodes.FirstOrDefault(o => ShardingDataSourceNames.DataSourceNames.Contains(o.GetDataSourceName()) &&
o.GetDataSourceName().Equals(dataSourceName)) ?? throw new ShardingException(
$"Cannot find actual data node for data source name: '{dataSourceName}' and logic table name: '{logicTableName}'"));
}
/**
* Find data node by logic table name.
*
* @param logicTableName logic table name
* @return data node
*/
public DataNode GetDataNode(string logicTableName)
{
TableRule tableRule = GetTableRule(logicTableName);
return(tableRule.ActualDataNodes[0]);
}
/**
* Get table sharding strategy.
*
* <p>
* Use default table sharding strategy if not found.
* </p>
*
* @param tableRule table rule
* @return table sharding strategy
*/
public IShardingStrategy GetTableShardingStrategy(TableRule tableRule)
{
return(tableRule.TableShardingStrategy ?? DefaultTableShardingStrategy);
}
private bool IsShardingColumn(TableRule tableRule, string columnName)
{
return(GetDatabaseShardingStrategy(tableRule).GetShardingColumns().Contains(columnName) || GetTableShardingStrategy(tableRule).GetShardingColumns().Contains(columnName));
}
/**
* Get database sharding strategy.
*
* <p>
* Use default database sharding strategy if not found.
* </p>
*
* @param tableRule table rule
* @return database sharding strategy
*/
public IShardingStrategy GetDatabaseShardingStrategy(TableRule tableRule)
{
return(tableRule.DatabaseShardingStrategy ?? DefaultDatabaseShardingStrategy);
}
