public IConfigInit UseDatabase <TDbAccessor>(string conString, DatabaseType dbType) where TDbAccessor : class, IDbAccessor
{
if (ShardingConfig.ServiceDescriptors != null)
{
ShardingConfig.ServiceDescriptors.AddScoped(_ =>
{
ILoggerFactory loggerFactory = _.GetService <ILoggerFactory>();
IDbAccessor repository = DbFactory.GetDbAccessor(conString, dbType, loggerFactory);
if (ShardingConfig.LogicDelete)
{
repository = new LogicDeleteDbAccessor(repository);
}
if (typeof(TDbAccessor) == typeof(IDbAccessor))
{
return((TDbAccessor)repository);
}
else
{
return(repository.ActLike <TDbAccessor>());
}
});
}
return(this);
}
private async Task <List <TResult> > GetStatisDataAsync <TResult>(Func <IQueryable, Task <TResult> > access, IQueryable newSource = null)
{
newSource = newSource ?? _source;
var tables = ShardingConfig.ConfigProvider.GetReadTables(_absTableName, _absDbName, _source);
List <Task <TResult> > tasks = new List <Task <TResult> >();
SynchronizedCollection <IDbAccessor> dbs = new SynchronizedCollection <IDbAccessor>();
tasks = tables.Select(aTable =>
{
IDbAccessor db;
if (_repository.OpenedTransaction)
{
db = _repository.GetMapDbAccessor(aTable.conString, aTable.dbType);
}
else
{
db = DbFactory.GetDbAccessor(aTable.conString, aTable.dbType);
}
dbs.Add(db);
var targetTable = MapTable(aTable.tableName);
var targetIQ = db.GetIQueryable(targetTable);
var newQ = newSource.ChangeSource(targetIQ);
return(access(newQ));
}).ToList();
var res = (await Task.WhenAll(tasks)).ToList();
if (!_repository.OpenedTransaction)
{
dbs.ForEach(x => x.Dispose());
}
return(res);
}
public async Task <List <T> > ToListAsync()
{
//去除分页,获取前Take+Skip数量
int?take = _source.GetTakeCount();
int?skip = _source.GetSkipCount();
skip = skip == null ? 0 : skip;
var(sortColumn, sortType) = _source.GetOrderBy();
var noPaginSource = _source.RemoveTake().RemoveSkip();
if (!take.IsNullOrEmpty())
{
noPaginSource = noPaginSource.Take(take.Value + skip.Value);
}
//从各个分表获取数据
var tables = ShardingConfig.ConfigProvider.GetReadTables(_absTableName, _absDbName, _source);
SynchronizedCollection <IDbAccessor> dbs = new SynchronizedCollection <IDbAccessor>();
List <Task <List <T> > > tasks = tables.Select(aTable =>
{
var targetTable = MapTable(aTable.tableName);
IDbAccessor db;
if (_repository.OpenedTransaction)
{
db = _repository.GetMapDbAccessor(aTable.conString, aTable.dbType);
}
else
{
db = DbFactory.GetDbAccessor(aTable.conString, aTable.dbType);
}
dbs.Add(db);
var targetIQ = db.GetIQueryable(targetTable);
var newQ = noPaginSource.ChangeSource(targetIQ);
return(newQ
.Cast <object>()
.Select(x => x.ChangeType <T>())
.ToListAsync());
}).ToList();
List <T> all = new List <T>();
(await Task.WhenAll(tasks.ToArray())).ToList().ForEach(x => all.AddRange(x));
if (!_repository.OpenedTransaction)
{
dbs.ForEach(x => x.Dispose());
}
//合并数据
var resList = all;
if (!sortColumn.IsNullOrEmpty() && !sortType.IsNullOrEmpty())
{
resList = resList.AsQueryable().OrderBy($"{sortColumn} {sortType}").ToList();
}
if (!skip.IsNullOrEmpty())
{
resList = resList.Skip(skip.Value).ToList();
}
if (!take.IsNullOrEmpty())
{
resList = resList.Take(take.Value).ToList();
}
return(resList);
}
