/// <summary>
/// Tries to fetch the <see cref="SchemaInfo"/> with the given <see cref="ShardMap"/> name without
/// raising any exception if data doesn't exist.
/// </summary>
/// <param name="shardMapName">The name of the <see cref="ShardMap"/> whose <see cref="SchemaInfo"/>
/// will be fetched</param>
/// <param name="schemaInfo">The <see cref="SchemaInfo"/> that was fetched or null if retrieval failed</param>
/// <returns>true if schema info exists with given name, false otherwise.</returns>
public bool TryGet(string shardMapName, out SchemaInfo schemaInfo)
{
ExceptionUtils.DisallowNullOrEmptyStringArgument(shardMapName, "shardMapName");
schemaInfo = null;
IStoreResults result;
using (IStoreOperationGlobal op = this.Manager.StoreOperationFactory.CreateFindShardingSchemaInfoGlobalOperation(
this.Manager,
"TryGet",
shardMapName))
{
result = op.Do();
}
if (result.Result == StoreResult.SchemaInfoNameDoesNotExist)
{
return(false);
}
schemaInfo = result.StoreSchemaInfoCollection
.Select(si => SerializationHelper.DeserializeXmlData <SchemaInfo>(si.ShardingSchemaInfo))
.Single();
return(true);
}
/// <summary>
/// Fetches the <see cref="SchemaInfo"/> stored with the supplied <see cref="ShardMap"/> name.
/// </summary>
/// <param name="shardMapName">The name of the <see cref="ShardMap"/> to get.</param>
/// <returns>SchemaInfo object.</returns>
public SchemaInfo Get(string shardMapName)
{
ExceptionUtils.DisallowNullOrEmptyStringArgument(shardMapName, "shardMapName");
IStoreResults result;
using (IStoreOperationGlobal op = this.Manager.StoreOperationFactory.CreateFindShardingSchemaInfoGlobalOperation(
this.Manager,
"Get",
shardMapName))
{
result = op.Do();
}
if (result.Result == StoreResult.SchemaInfoNameDoesNotExist)
{
throw new SchemaInfoException(
SchemaInfoErrorCode.SchemaInfoNameDoesNotExist,
Errors._Store_SchemaInfo_NameDoesNotExist,
"Get",
shardMapName);
}
return(result.StoreSchemaInfoCollection
.Select(si => SerializationHelper.DeserializeXmlData <SchemaInfo>(si.ShardingSchemaInfo))
.Single());
}
/// <summary>
/// Initializes a new instance of the <see cref="ReferenceTableInfo"/> class.
/// </summary>
/// <param name="tableName">Reference table name.</param>
public ReferenceTableInfo(string tableName)
{
ExceptionUtils.DisallowNullOrEmptyStringArgument(tableName, "tableName");
this.SchemaName = "dbo";
this.TableName = tableName;
}
/// <summary>
/// Initializes a new instance of the <see cref="ShardedTableInfo"/> class.
/// </summary>
/// <param name="tableName">Sharded table name.</param>
/// <param name="columnName">Shard key column name.</param>
public ShardedTableInfo(string tableName, string columnName)
{
ExceptionUtils.DisallowNullOrEmptyStringArgument(tableName, "tableName");
ExceptionUtils.DisallowNullOrEmptyStringArgument(columnName, "columnName");
this.SchemaName = "dbo";
this.TableName = tableName;
this.KeyColumnName = columnName;
}
/// <summary>
/// Removes the <see cref="SchemaInfo"/> with the given <see cref="ShardMap"/> name.
/// </summary>
/// <param name="shardMapName">The name of the <see cref="ShardMap"/> whose <see cref="SchemaInfo"/>
/// will be removed</param>
public void Remove(string shardMapName)
{
ExceptionUtils.DisallowNullOrEmptyStringArgument(shardMapName, "shardMapName");
using (IStoreOperationGlobal op = this.Manager.StoreOperationFactory.CreateRemoveShardingSchemaInfoGlobalOperation(
this.Manager,
"Remove",
shardMapName))
{
op.Do();
}
}
/// <summary>
/// Replaces the <see cref="SchemaInfo"/> with the given <see cref="ShardMap"/> name.
/// </summary>
/// <param name="shardMapName">The name of the <see cref="ShardMap"/> whose <see cref="SchemaInfo"/> will be replaced.</param>
/// <param name="schemaInfo">Sharding schema information.</param>
public void Replace(string shardMapName, SchemaInfo schemaInfo)
{
ExceptionUtils.DisallowNullOrEmptyStringArgument(shardMapName, "shardMapName");
ExceptionUtils.DisallowNullArgument <SchemaInfo>(schemaInfo, "schemaInfo");
DefaultStoreSchemaInfo dssi = new DefaultStoreSchemaInfo(
shardMapName,
SerializationHelper.SerializeXmlData <SchemaInfo>(schemaInfo));
using (IStoreOperationGlobal op = this.Manager.StoreOperationFactory.CreateUpdateShardingSchemaInfoGlobalOperation(
this.Manager,
"Replace",
dssi))
{
op.Do();
}
}