C# mongodb 简单自增排序 以及批量去重批量入库

花蜻宽

　　//取自动排序大小



private Int64 SeqInt(int size)
{
var jobs = db.GetCollection("Counters");
var query = Query.And(Query.EQ("_id", "TaoBaoItem"));
var sortBy = SortBy.Descending("next");
var update = Update.Inc("next", (Int64)size);//.Push("new", true).Push("upsert", true);
var result = jobs.FindAndModify(query, sortBy, update, true, true);
BsonDocument chosenJob = result.ModifiedDocument;
return chosenJob.GetValue("next").AsInt64;
}
　　
　　
　　



///
/// 批量查找存在的数据
///
///
///
private MongoCursor QueryItems(List cacheitems)
{
Stopwatch sw = new Stopwatch();
sw.Start();
BsonArray dd;
dd = new BsonArray();
//批量插询
foreach (var item in cacheitems)
{
dd.Add(item.Iid);
}
var query = Query.In("Iid", dd);
IMongoQuery q = query;
// var count = taoBaoItemRepo.Collection.Count(q);
var sort = new SortByDocument { { "_id", -1 } };
var x = taoBaoItemRepo.Collection.Find(q).SetSortOrder(sort);
sw.Stop();
WorkMsg("自写查询{0}条耗时：{1}\r\n".FormatWith(cacheitems.Count, sw.ElapsedMilliseconds));
return x;
}
　　
　　
　　业务部份
　　



        ///
/// 去重入库线程
///
public void Work()
{
while (true)
{
List cacheitems = ItemCache.GetLItem();
if (cacheitems != null)
{
Stopwatch sw = new Stopwatch();
sw.Start();
MongoCursor rz = QueryItems(cacheitems);
foreach (TaoBaoItem doc in rz)
{
HashCache.Add(doc.Iid);
}
int i = 0;
foreach (var item in cacheitems)
{
i++;
if (HashCache.Add(item.Iid))
{

Items.Add(item);
//temp计数  并作大于100的判断
if (Items.Count >= 100 || (i == cacheitems.Count && ItemCache.Count() == 0))
{
var seqid = SeqInt(Items.Count) ;
seqid = seqid - Items.Count;
foreach (var x in Items)
{
x.DocId = seqid;
seqid++;                                 
}
Stopwatch sw1 = new Stopwatch();
sw1.Start();
taoBaoItemRepo.Add(Items);
sw1.Stop();
WorkMsg("插入{0}条宝贝耗时：{1}\t库内共有宝贝{2}\t".FormatWith(Items.Count, sw1.ElapsedMilliseconds, taoBaoItemRepo.Count()));
Items.Clear();
}
}
}
sw.Stop();
WorkMsg("{0}条记录处理[去重+入库]总耗时：{1}\r\n".FormatWith(cacheitems.Count, sw.ElapsedMilliseconds));
}
else
{
Thread.Sleep(5000);
}
}
}