/// <summary>
/// 根据单词获取一个倒排列表
/// </summary>
/// <param name="word"></param>
/// <returns></returns>
public async Task <IndexList> GetOrAddIndexList(WordAtom word)
{
HashIndexList hashIndex = null;
if (CurrentIndexList.TryGetValue(word.Word, out hashIndex))
{
return(hashIndex.List);
}
int hashcode = word.GetHashCode();
DictAndState dict;
MongoClient Client = Mongo.GetNode(hashcode.ToString());
if (!DictList.TryGetValue(hashcode, out dict))
{
dict = new DictAndState()
{
IsNew = true,
Dict = new HashDict()
{
Hashcode = hashcode,
Words = new ConcurrentDictionary <string, string>()
}
};
hashIndex = new HashIndexList()
{
Hashcode = hashcode, List = CreateEmptyIndexList(word), IsNew = true
};
dict.Dict.Words.TryAdd(word.Word, hashIndex.List.Id);
if (!DictList.TryAdd(hashcode, dict))
{
return(null);
}
}
string listId;
if (dict.Dict.Words.TryGetValue(word.Word, out listId))
{
if (hashIndex == null || listId != hashIndex.List.Id)
{
var indexListDb = Client.GetDatabase(Config.IndexListDbName).GetCollection <BsonDocument>(ListHash.GetNode(hashcode.ToString()));
var index = await indexListDb.Find(Builders <BsonDocument> .Filter.Eq("_id", listId)).SingleOrDefaultAsync();
hashIndex = new HashIndexList()
{
Hashcode = hashcode,
IsNew = false,
List = new IndexList()
{
Id = listId,
IndexAtoms = index != null ? new ConcurrentDictionary <string, IndexAtom>(AtomDerializer.UnpackSingleObject(index["IndexAtoms"].AsByteArray)) : new ConcurrentDictionary <string, IndexAtom>()
}
};
}
}
if (!CurrentIndexList.TryAdd(word.Word, hashIndex))
{
return(null);
}
return(hashIndex.List);
}
/// <summary>
/// 保存数据并返回DocId
/// </summary>
/// <param name="propertys"></param>
/// <returns></returns>
public async Task <string> save(List <PropertyInfo> propertys)
{
var id = ObjectId.GenerateNewId().ToString();
BsonDocument bson = new BsonDocument("_id", id);
foreach (var property in propertys)
{
if (property.Save)
{
bson.Add(property.Name, property.Value);
}
}
var collection = Mongo.GetNode(id.ToString()).GetDatabase(DocDatabase).GetCollection <BsonDocument>(ListHash.GetNode(id.ToString()));
await collection.InsertOneAsync(bson);
return(id);
}