/// <summary>
/// 得到查询
/// </summary>
/// <param name="dbRoute"></param>
/// <param name="query"></param>
/// <returns></returns>
protected virtual IList <QueryInfo> GetHandleQueries(DbRouteInfo dbRoute, QueryInfo query)
{
if (dbRoute.GetQueryShardingHandle == null)
{
return(null);
}
var shardings = dbRoute.GetQueryShardingHandle(query);
if (shardings != null && shardings.Count > 0)
{
var result = new List <QueryInfo>();
if (shardings.Count == 1)
{
var sharding = shardings[0];
query.TableIndex = string.IsNullOrWhiteSpace(sharding.TableIndex)
? sharding.TableIndex
: sharding.TableIndex.ToLower();
query.GetDataBase = string.IsNullOrWhiteSpace(sharding.GetDataBase)
? sharding.GetDataBase
: sharding.GetDataBase.ToLower();
result.Add(query);
}
else
{
MergeQueries(result, dbRoute, query, shardings);
}
return(result);
}
return(null);
}
/// <summary>
/// 得到分片
/// </summary>
/// <returns></returns>
protected virtual IList <ShardingInfo> GetShardings(DbRouteInfo dbRoute, string proertyName, object value, bool isSave)
{
var key = string.Format("{0}{1}", dbRoute.Name, proertyName);
if (DbPropertyRoutes.ContainsKey(key))
{
var result = new List <ShardingInfo>();
var shardings = DbPropertyRoutes[key];
foreach (var sharding in shardings)
{
var shardProperty = sharding.ShardProperties.FirstOrDefault(it => it.PropertyName == proertyName);
var tableIndex = shardProperty.GetTableIndex(value, sharding);
sharding.TableIndex = tableIndex;
var getDataBase = isSave ? sharding.GetDataBase : shardProperty.GetQueryDataBaseIndex(value, sharding);
var setDataBase = isSave? shardProperty.GetSaveDataBaseIndex(value, sharding) : sharding.SetDataBase;
if (tableIndex != null)
{
result.Add(new ShardingInfo
{
TableIndex = tableIndex,
MaxTableIndex = sharding.MaxTableIndex,
SetDataBase = setDataBase,
GetDataBase = getDataBase,
IsWrite = sharding.IsWrite
});
}
}
if (result.Count > 0)
{
return(result);
}
}
return(null);
}
/// <summary>
/// 得到查询
/// </summary>
/// <param name="dbRoute"></param>
/// <param name="shardings"></param>
/// <param name="query"></param>
/// <param name="result"></param>
/// <returns></returns>
protected virtual void AppendQueryByShardings(IList <QueryInfo> result, DbRouteInfo dbRoute, IList <ShardingInfo> shardings, QueryInfo query)
{
if (shardings.Count == 1)
{
var sharding = shardings[0];
query.TableIndex = string.IsNullOrWhiteSpace(sharding.TableIndex)
? sharding.TableIndex
: sharding.TableIndex.ToLower();
query.GetDataBase = string.IsNullOrWhiteSpace(sharding.GetDataBase)
? sharding.GetDataBase
: sharding.GetDataBase.ToLower();
result.Add(query);
}
else
{
foreach (var sharding in shardings)
{
var cloneQuery = GetQuery(dbRoute, query, sharding);
if (cloneQuery != null &&
result.Count(
it =>
it.GetDataBase == cloneQuery.GetDataBase &&
it.GetTableName == cloneQuery.GetTableName) == 0)
{
result.Add(cloneQuery);
}
}
}
}
/// <summary>
/// 得到数据库信息
/// </summary>
/// <param name="dbRoutes"></param>
/// <param name="doc"></param>
/// <returns></returns>
protected virtual void LoadDbRouteByXml(IDictionary <string, DbRouteInfo> dbRoutes, XmlDocument doc)
{
XmlNodeList nodes = doc.SelectNodes("/configuration/Persistence/XmlDbRoute/Info");
if (nodes != null)
{
foreach (XmlNode node in nodes)
{
var dbroute = new DbRouteInfo {
Rules = new List <RuleInfo>(), Shardings = new List <ShardingInfo>()
};
if (node.Attributes == null)
{
return;
}
dbroute.Name = node.Attributes["Name"].Value.ToLower();
if (node.Attributes["TopCount"] != null)
{
dbroute.TopCount = Convert.ToInt32(node.Attributes["TopCount"].Value);
}
if (node.Attributes["IsReturnAllShardings"] != null)
{
dbroute.IsReturnAllShardings = Convert.ToBoolean(node.Attributes["IsReturnAllShardings"].Value);
}
if (node.Attributes["IsMapTableAutoSharding"] != null)
{
dbroute.IsMapTableAutoSharding = Convert.ToBoolean(node.Attributes["IsMapTableAutoSharding"].Value);
}
if (node.Attributes["ClassName"] != null)
{
var obj = CreateClass(node.Attributes["ClassName"].Value);
if (obj != null)
{
if (node.Attributes["GetQueryShardingHandle"] != null)
{
dbroute.GetQueryShardingHandle = (Func <QueryInfo, IList <ShardingInfo> >)Delegate.CreateDelegate(typeof(Func <QueryInfo, IList <ShardingInfo> >), obj, node.Attributes["GetQueryShardingHandle"].Value);
}
if (node.Attributes["GetSaveShardingHandle"] != null)
{
dbroute.GetSaveShardingHandle = (Func <object, ShardingInfo>)Delegate.CreateDelegate(typeof(Func <object, ShardingInfo>), obj, node.Attributes["GetSaveShardingHandle"].Value);
}
}
}
LoadRulesByXmlNode(dbroute, node);
LoadShardingsByXmlNode(dbroute, node);
if (dbRoutes.ContainsKey(dbroute.Name))
{
dbRoutes.Remove(dbroute.Name);
}
dbRoutes.Add(dbroute.Name, dbroute);
}
}
}
/// <summary>
/// 根据节点得到OrmDataBase
/// </summary>
/// <param name="dbRoute"></param>
/// <param name="node"></param>
/// <returns></returns>
protected virtual void LoadShardingsByXmlNode(DbRouteInfo dbRoute, XmlNode node)
{
var nodes = node.SelectNodes("Sharding");
if (nodes == null)
{
return;
}
foreach (XmlNode nd in nodes)
{
var sharding = new ShardingInfo {
ShardProperties = new List <ShardPropertyInfo>()
};
sharding.GetDataBase = nd.Attributes["GetDataBase"] != null
? nd.Attributes["GetDataBase"].Value.ToLower()
: "";
sharding.SetDataBase = nd.Attributes["SetDataBase"] != null
? nd.Attributes["SetDataBase"].Value.ToLower()
: "";
sharding.TableIndex = nd.Attributes["TableIndex"] != null
? nd.Attributes["TableIndex"].Value.ToLower()
: "";
sharding.MaxTableIndex = nd.Attributes["MaxTableIndex"] != null
? nd.Attributes["MaxTableIndex"].Value.ToLower()
: "";
sharding.TableTag = nd.Attributes["TableTag"] != null
? nd.Attributes["TableTag"].Value.ToLower()
: "";
sharding.IsWrite = nd.Attributes["IsWrite"] == null || Convert.ToBoolean(nd.Attributes["IsWrite"].Value);
if (nd.Attributes["TableStepType"] != null)
{
sharding.TableStepType = (TableStepType)Enum.Parse(typeof(TableStepType), nd.Attributes["TableStepType"].Value);
}
if (nd.Attributes["TableStep"] != null)
{
sharding.TableStep = Convert.ToInt32(nd.Attributes["TableStep"].Value);
}
if (nd.Attributes["GetDataBaseTableCount"] != null)
{
sharding.GetDataBaseTableCount = Convert.ToInt32(nd.Attributes["GetDataBaseTableCount"].Value);
}
if (nd.Attributes["SetDataBaseTableCount"] != null)
{
sharding.SetDataBaseTableCount = Convert.ToInt32(nd.Attributes["SetDataBaseTableCount"].Value);
}
LoadShardingPropertiesByXmlNode(sharding, nd);
dbRoute.Shardings.Add(sharding);
}
}
/// <summary>
/// 合并查询
/// </summary>
/// <param name="result"></param>
/// <param name="dbRoute"></param>
/// <param name="query"></param>
/// <param name="shardings"></param>
/// <returns></returns>
protected virtual void MergeQueries(IList <QueryInfo> result, DbRouteInfo dbRoute, QueryInfo query,
IList <ShardingInfo> shardings)
{
foreach (var sharding in shardings)
{
var cloneQuery = GetQuery(dbRoute, query, sharding);
if (cloneQuery != null &&
result.Count(
it => it.GetDataBase == cloneQuery.GetDataBase && it.GetTableName == cloneQuery.GetTableName) ==
0)
{
result.Add(cloneQuery);
}
}
}
/// <summary>
/// 根据节点得到OrmDataBase
/// </summary>
/// <param name="dbRoute"></param>
/// <param name="node"></param>
/// <returns></returns>
protected virtual void LoadRulesByXmlNode(DbRouteInfo dbRoute, XmlNode node)
{
var nodes = node.SelectNodes("Rule");
if (nodes == null)
{
return;
}
foreach (XmlNode nd in nodes)
{
var rule = new RuleInfo();
rule.IsHash = nd.Attributes["IsHash"] != null && Convert.ToBoolean(nd.Attributes["IsHash"].Value);
rule.IsSave = nd.Attributes["IsSave"] != null && Convert.ToBoolean(nd.Attributes["IsSave"].Value);
rule.PropertyName = nd.Attributes["PropertyName"] != null ? nd.Attributes["PropertyName"].Value : "";
dbRoute.Rules.Add(rule);
}
}
/// <summary>
/// 得到查询
/// </summary>
/// <param name="dbRoute"></param>
/// <param name="query"></param>
/// <param name="sharding"></param>
/// <returns></returns>
protected virtual QueryInfo GetQuery(DbRouteInfo dbRoute, QueryInfo query, ShardingInfo sharding)
{
if (sharding == null)
{
return(null);
}
var result = new QueryInfo
{
DataCount = query.DataCount,
FromExp = query.FromExp,
GroupByExp = query.GroupByExp,
HavingExp = query.HavingExp,
IsDisinct = query.IsDisinct,
IsGreedyLoad = query.IsGreedyLoad,
IsLazyLoad = query.IsLazyLoad,
OrderByExp = query.OrderByExp,
PageSize = query.PageSize + query.PageIndex * query.PageSize,
RemoteQueries = query.RemoteQueries,
SelectExp = query.SelectExp,
WhereExp = query.WhereExp,
TableIndex = string.IsNullOrWhiteSpace(sharding.TableIndex) ? sharding.TableIndex : sharding.TableIndex.ToLower(),
GetDataBase = string.IsNullOrWhiteSpace(sharding.GetDataBase)? sharding.GetDataBase: sharding.GetDataBase.ToLower(),
Object = query.Object,
DbRoute = query.DbRoute
};
if (query.Parameters != null)
{
result.Parameters = new Dictionary <string, object>();
foreach (var parameter in query.Parameters)
{
result.Parameters.Add(parameter.Key, parameter.Value);
}
}
if (query.Cache != null)
{
result.Cache = new CacheInfo
{
Time = query.Cache.Time,
TimeSpan = query.Cache.TimeSpan
};
}
return(result);
}
/// <summary>
/// 得到所有路由
/// </summary>
/// <param name="dbRoute"></param>
/// <param name="query"></param>
/// <returns></returns>
protected virtual IList <QueryInfo> GetAllQueries(DbRouteInfo dbRoute, QueryInfo query)
{
if (!dbRoute.IsReturnAllShardings)
{
return(null);
}
var result = new List <QueryInfo>();
foreach (var readSharding in dbRoute.Shardings)
{
var shardings = readSharding.GetAllShardings();
if (shardings == null)
{
continue;
}
MergeQueries(result, dbRoute, query, shardings);
}
return(result);
}
