基于官方驱动封装mongodb

还是一如既往先把结构图放出来，上上个版本添加了redis的缓存，但是不满足我的需求，因为公司有项目要求是分布式所以呢，这里我就增加了mongoDb进行缓存分布式，好了先看结构图(1)。

总的来说比较蛋疼，因为从来没有使用过mongoDB，从安装，到转为windows服务，设置权限等等，好吧这都是题外话。

在写这个MongoDB版本的时候遇到的一些问题，我先总结下：

1.MongoDb版本是官网最新版3.4.4，官方驱动为2.4.3，首先我的项目是以GUID做为主键，在往MongonDB中插入时遇到的是将GUID生成了MongoDB的LUUID格式产生了这样的格式(2)并且和我的数据库不同(3)当然redis也不同(4)。

a)带着问题我们去解决查了文档发现原来因为bson的键要标识成GUID，并且格式要转为string，既然知道问题了就去解决找到我的GUID主键，如下图(5)：

在主键上加上 [BsonId(IdGenerator = typeof(GuidGenerator)), BsonRepresentation(BsonType.String)]这段就可以了，看了下效果确实可以了(6)。

2.但是在测试过程中查询的时候却找不到，一查原来我的数据库redis的id值都不一样，这又是怎么回事？

b)原来mongoDB生成的GUID和C#生成的GUID的进制是不一样的，为了解决这个问题，Google了一下，找到了一个脚本，把这个js脚本放在mongoDB里面执行一下，然后生成的GUID就和数据库的一样了。如图(7)：

然后生成的_id就和我数据redis的一样了。(8)(9)

解决完成这些问题后开始写自己的封装类。

希望大家多给出建议，博主也是第一次玩mongoDB,如果有好的学习资源也请推荐给博主。

第一步创建连接：

using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KuRuMi.Mio.DoMain.MongoDbCache.MongoDbCommon
{
    public class MongoDbManager
    {
        private static IMongoDatabase db = null;
        private static readonly object locker = new object();
        /// <summary>
        /// 使用单列模式创建连接
        /// </summary>
        /// <returns></returns>
        public static IMongoDatabase CreateDb()
        {
            if (db == null)
            {
                lock (locker)
                {
                    if (db == null)
                    {
                        MongoClient Client = new MongoClient(MongoDbConfig.Host);
                        db = Client.GetDatabase(MongoDbConfig.DataBase);
                    }
                }
            }
            return db;
        }
    }
}

第二步创建DB：

using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KuRuMi.Mio.DoMain.MongoDbCache.MongoDbCommon
{
    public class MongoDbBase
    {
        private IMongoDatabase db = null;
        public IMongoDatabase Db { get => db; }
        public MongoDbBase()
        {
            db = MongoDbManager.CreateDb();
        }
    }
}

然后呢献上自己的封装helper：

using KuRuMi.Mio.DoMain.MongoDbCache.MongoDbCommon;
using MongoDB.Bson;
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;

namespace KuRuMi.Mio.DoMain.MongoDbCache.MongoDbCache
{
    /// <summary>
    /// MongoDb缓存
    /// </summary>
    public sealed class MongoDbCacheService : MongoDbBase
    {
        #region 同步
        #region 增加
        /// <summary>
        /// 保存单个对象
        /// </summary>
        /// <param name="Root"></param>
        /// <returns></returns>
        public bool AddSignleObject<TAggregateRoot>(TAggregateRoot Root)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                collection.InsertOne(Root);
                return true;
            }
            catch (Exception)
            {
                return false;
            }

        }
        /// <summary>
        /// 批量保存多个对象
        /// </summary>
        /// <param name="Root"></param>
        /// <returns></returns>
        public bool AddManyObject<TAggregateRoot>(List<TAggregateRoot> Root)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                collection.InsertMany(Root);
                return true;
            }
            catch (Exception)
            {
                return false;
            }

        }
        #endregion

        #region 删除
        /// <summary>
        /// 删除单个记录
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public int DeleteSingleIndex<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                return (int)collection.DeleteOne(filter).DeletedCount;
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion

        #region 查询
        /// <summary>
        /// 查询单条记录
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public TAggregateRoot FindSingleIndex<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                return collection.Find(filter).FirstOrDefault();
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        /// <summary>
        /// 查询整个集合
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="filter"></param>
        /// <returns></returns>
        public List<TAggregateRoot> FindMany<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                return collection.Find(filter).ToList();
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion

        #region 更新
        /// <summary>
        /// 更新单个值
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="filter"></param>
        /// <param name="field"></param>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public int UpdateSingle<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter, string name, string parameter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                var set = Builders<TAggregateRoot>.Update.Set(name, parameter);
                return (int)collection.UpdateOne(filter, set).ModifiedCount;
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        /// <summary>
        /// 更新多个值
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="filter"></param>
        /// <param name="Root"></param>
        /// <param name="property"></param>
        /// <param name="replace"></param>
        public int UpdateMany<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter, TAggregateRoot Root, List<string> property = null, bool replace = false)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                var type = Root.GetType();
                //修改集合
                var list = new List<UpdateDefinition<TAggregateRoot>>();
                foreach (var propert in type.GetProperties())
                {
                    if (propert.Name.ToLower() != "id")
                    {
                        try
                        {
                            if (property == null && property.Count < 1 || property.Any(o => o.ToLower() == propert.Name.ToLower()))
                            {
                                var replaceValue = propert.GetValue(Root);
                                if (replaceValue != null)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                                else if (replace)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                            }
                        }
                        catch (Exception)
                        {
                            if (property == null)
                            {
                                var replaceValue = propert.GetValue(Root);
                                if (replaceValue != null)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                                else if (replace)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                            }
                        }
                        
                    }
                }
                if (list.Count > 0)
                {
                    var builders = Builders<TAggregateRoot>.Update.Combine(list);
                    return (int)collection.UpdateOne(filter, builders).ModifiedCount;
                }
                return 0;
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion
        #endregion

        #region 异步
        #region 增加
        /// <summary>
        /// 异步保存单个对象
        /// </summary>
        /// <param name="Root"></param>
        /// <returns></returns>
        public bool AddSignleObjectAsync<TAggregateRoot>(TAggregateRoot Root)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                collection.InsertOneAsync(Root);
                return true;
            }
            catch (Exception)
            {
                return false;
            }

        }
        /// <summary>
        /// 批量保存多个对象
        /// </summary>
        /// <param name="Root"></param>
        /// <returns></returns>
        public bool AddManyObjectAsync<TAggregateRoot>(List<TAggregateRoot> Root)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                collection.InsertManyAsync(Root);
                return true;
            }
            catch (Exception)
            {
                return false;
            }

        }
        #endregion

        #region 删除
        /// <summary>
        /// 异步删除单个记录
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public int DeleteSingleIndexAsync<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                return (int)collection.DeleteOneAsync(filter).Result.DeletedCount;
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion

        #region 查询
        /// <summary>
        /// 异步查询单条记录
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public TAggregateRoot FindSingleIndexAsync<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                return collection.FindAsync(filter).Result.FirstOrDefault();
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        /// <summary>
        /// 异步查询整个集合
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="filter"></param>
        /// <returns></returns>
        public List<TAggregateRoot> FindManyAsync<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                return collection.FindAsync(filter).Result.ToList();
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion

        #region 更新
        /// <summary>
        /// 异步更新单个值
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="filter"></param>
        /// <param name="field"></param>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public int UpdateSingleAsync<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter, string name, string parameter)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                var set = Builders<TAggregateRoot>.Update.Set(name, parameter);
                return (int)collection.UpdateOneAsync(filter, set).Result.ModifiedCount;
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        /// <summary>
        ///异步更新多个值
        /// </summary>
        /// <typeparam name="TAggregateRoot"></typeparam>
        /// <param name="filter"></param>
        /// <param name="Root"></param>
        /// <param name="property"></param>
        /// <param name="replace"></param>
        public int UpdateManyAsync<TAggregateRoot>(Expression<Func<TAggregateRoot, bool>> filter, TAggregateRoot Root, List<string> property = null, bool replace = false)
        {
            try
            {
                var collection = Db.GetCollection<TAggregateRoot>(typeof(TAggregateRoot).Name);
                var type = Root.GetType();
                //修改集合
                var list = new List<UpdateDefinition<TAggregateRoot>>();
                foreach (var propert in type.GetProperties())
                {
                    if (propert.Name.ToLower() != "id")
                    {
                        try
                        {
                            if (property == null && property.Count < 1 || property.Any(o => o.ToLower() == propert.Name.ToLower()))
                            {
                                var replaceValue = propert.GetValue(Root);
                                if (replaceValue != null)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                                else if (replace)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                            }
                        }
                        catch (Exception)
                        {
                            if (property == null)
                            {
                                var replaceValue = propert.GetValue(Root);
                                if (replaceValue != null)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                                else if (replace)
                                    list.Add(Builders<TAggregateRoot>.Update.Set(propert.Name, replaceValue));
                            }
                        }

                    }
                }
                if (list.Count > 0)
                {
                    var builders = Builders<TAggregateRoot>.Update.Combine(list);
                   return (int)collection.UpdateOneAsync(filter, builders).Result.ModifiedCount;
                }
                return 0;
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion
        #endregion
    }
}

最后是脚本文件:

function HexToBase64(hex) {
    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    var base64 = "";
    var group;
    for (var i = 0; i < 30; i += 6) {
        group = parseInt(hex.substr(i, 6), 16);
        base64 += base64Digits[(group >> 18) & 0x3f];
        base64 += base64Digits[(group >> 12) & 0x3f];
        base64 += base64Digits[(group >> 6) & 0x3f];
        base64 += base64Digits[group & 0x3f];
    }
    group = parseInt(hex.substr(30, 2), 16);
    base64 += base64Digits[(group >> 2) & 0x3f];
    base64 += base64Digits[(group << 4) & 0x3f];
    base64 += "==";
    return base64;
}

function Base64ToHex(base64) {
    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    var hexDigits = "0123456789abcdef";
    var hex = "";
    for (var i = 0; i < 24;) {
        var e1 = base64Digits.indexOf(base64[i++]);
        var e2 = base64Digits.indexOf(base64[i++]);
        var e3 = base64Digits.indexOf(base64[i++]);
        var e4 = base64Digits.indexOf(base64[i++]);
        var c1 = (e1 << 2) | (e2 >> 4);
        var c2 = ((e2 & 15) << 4) | (e3 >> 2);
        var c3 = ((e3 & 3) << 6) | e4;
        hex += hexDigits[c1 >> 4];
        hex += hexDigits[c1 & 15];
        if (e3 != 64) {
            hex += hexDigits[c2 >> 4];
            hex += hexDigits[c2 & 15];
        }
        if (e4 != 64) {
            hex += hexDigits[c3 >> 4];
            hex += hexDigits[c3 & 15];
        }
    }
    return hex;
}

function UUID(uuid) {
    var hex = uuid.replace(/[{}-]/g, ""); // remove extra characters
    var base64 = HexToBase64(hex);
    return new BinData(4, base64); // new subtype 4
}

function JUUID(uuid) {
    var hex = uuid.replace(/[{}-]/g, ""); // remove extra characters
    var msb = hex.substr(0, 16);
    var lsb = hex.substr(16, 16);
    msb = msb.substr(14, 2) + msb.substr(12, 2) + msb.substr(10, 2) + msb.substr(8, 2) + msb.substr(6, 2) + msb.substr(4, 2) + msb.substr(2, 2) + msb.substr(0, 2);
    lsb = lsb.substr(14, 2) + lsb.substr(12, 2) + lsb.substr(10, 2) + lsb.substr(8, 2) + lsb.substr(6, 2) + lsb.substr(4, 2) + lsb.substr(2, 2) + lsb.substr(0, 2);
    hex = msb + lsb;
    var base64 = HexToBase64(hex);
    return new BinData(3, base64);
}

function CSUUID(uuid) {
    var hex = uuid.replace(/[{}-]/g, ""); // remove extra characters
    var a = hex.substr(6, 2) + hex.substr(4, 2) + hex.substr(2, 2) + hex.substr(0, 2);
    var b = hex.substr(10, 2) + hex.substr(8, 2);
    var c = hex.substr(14, 2) + hex.substr(12, 2);
    var d = hex.substr(16, 16);
    hex = a + b + c + d;
    var base64 = HexToBase64(hex);
    return new BinData(3, base64);
}

function PYUUID(uuid) {
    var hex = uuid.replace(/[{}-]/g, ""); // remove extra characters
    var base64 = HexToBase64(hex);
    return new BinData(3, base64);
}

BinData.prototype.toUUID = function () {
    var hex = Base64ToHex(this.base64()); // don't use BinData's hex function because it has bugs in older versions of the shell
    var uuid = hex.substr(0, 8) + '-' + hex.substr(8, 4) + '-' + hex.substr(12, 4) + '-' + hex.substr(16, 4) + '-' + hex.substr(20, 12);
    return 'UUID("' + uuid + '")';
}

BinData.prototype.toJUUID = function () {
    var hex = Base64ToHex(this.base64()); // don't use BinData's hex function because it has bugs in older versions of the shell
    var msb = hex.substr(0, 16);
    var lsb = hex.substr(16, 16);
    msb = msb.substr(14, 2) + msb.substr(12, 2) + msb.substr(10, 2) + msb.substr(8, 2) + msb.substr(6, 2) + msb.substr(4, 2) + msb.substr(2, 2) + msb.substr(0, 2);
    lsb = lsb.substr(14, 2) + lsb.substr(12, 2) + lsb.substr(10, 2) + lsb.substr(8, 2) + lsb.substr(6, 2) + lsb.substr(4, 2) + lsb.substr(2, 2) + lsb.substr(0, 2);
    hex = msb + lsb;
    var uuid = hex.substr(0, 8) + '-' + hex.substr(8, 4) + '-' + hex.substr(12, 4) + '-' + hex.substr(16, 4) + '-' + hex.substr(20, 12);
    return 'JUUID("' + uuid + '")';
}

BinData.prototype.toCSUUID = function () {
    var hex = Base64ToHex(this.base64()); // don't use BinData's hex function because it has bugs in older versions of the shell
    var a = hex.substr(6, 2) + hex.substr(4, 2) + hex.substr(2, 2) + hex.substr(0, 2);
    var b = hex.substr(10, 2) + hex.substr(8, 2);
    var c = hex.substr(14, 2) + hex.substr(12, 2);
    var d = hex.substr(16, 16);
    hex = a + b + c + d;
    var uuid = hex.substr(0, 8) + '-' + hex.substr(8, 4) + '-' + hex.substr(12, 4) + '-' + hex.substr(16, 4) + '-' + hex.substr(20, 12);
    return 'CSUUID("' + uuid + '")';
}

BinData.prototype.toPYUUID = function () {
    var hex = Base64ToHex(this.base64()); // don't use BinData's hex function because it has bugs
    var uuid = hex.substr(0, 8) + '-' + hex.substr(8, 4) + '-' + hex.substr(12, 4) + '-' + hex.substr(16, 4) + '-' + hex.substr(20, 12);
    return 'PYUUID("' + uuid + '")';
}


BinData.prototype.toHexUUID = function () {
    var hex = Base64ToHex(this.base64()); // don't use BinData's hex function because it has bugs
    var uuid = hex.substr(0, 8) + '-' + hex.substr(8, 4) + '-' + hex.substr(12, 4) + '-' + hex.substr(16, 4) + '-' + hex.substr(20, 12);
    return 'HexData(' + this.subtype() + ', "' + uuid + '")';
}

仓储层的调用：

using KuRuMi.Mio.DoMain.Model.Model;
using KuRuMi.Mio.DoMain.Model.Repositories;
using KuRuMi.Mio.DoMain.Repository.EFRepository;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KuRuMi.Mio.DoMain.Repository.ModelRepository
{
    public class UserRepositoryImpl : RepositoryImpl<User>, IUserRepository
    {
        public KurumiMioDbContext context => lazy.Context as KurumiMioDbContext;
        /// <summary>
        /// 登录
        /// </summary>
        /// <param name="Email"></param>
        /// <param name="PassWord"></param>
        /// <returns></returns>
        public string CheckUser(string Email, string PassWord)
        {
            try
            {
                User entity = null;
                //MongoDb取
                entity = Mongo.FindSingleIndex<User>(a => a.Email == Email);
                if (entity == null)
                {
                    //redis取
                    entity = Redis.RedisString.Value.StringGet<User>(Email);
                }
                if (entity == null)
                {
                    //数据库取
                    string sql = "select Id,UserName,Password,email from [User] as a where a.Email ='{0}' and  a.PassWord ='{1}'";
                    string select = string.Format(sql, Email, PassWord);
                    entity = context.user.SqlQuery(select).FirstOrDefault();
                }
                return entity.UserName;
            }
            catch (Exception e)
            {
                return "";
            }
        }

        /// <summary>
        /// 保存
        /// </summary>
        /// <param name="aggregateRoot"></param>
        public async override void Add(User aggregateRoot)
        {
            base.Add(aggregateRoot);
            await Redis.RedisString.Value.StringSetAsync(aggregateRoot.Email, aggregateRoot);//保存一份到redis
            Mongo.AddSignleObjectAsync(aggregateRoot);//保存一份到mongoDb
        }

        /// <summary>
        /// 注册
        /// </summary>
        /// <param name="info"></param>
        /// <returns></returns>
        public User GetAll(User info)
        {
            string sql = "select Id,UserName,Password,email from [User] as a where a.UserName ='{0}' and email ='{1}'";
            string select = string.Format(sql, info.UserName, info.Email);
            return context.user.SqlQuery(select).FirstOrDefault();
        }
    }
}

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