win7基于MongoDB的仓储实现

来源:爱站网时间:2022-10-12编辑:网友分享
本文给大家介绍下win7基于MongoDB的仓储实现配置信息及具体的使用示例,感兴趣的小伙本可以随时来看一看,希望爱站技术频道小编整理的资料对你有所帮助。

简单的介绍一下,我使用MongoDB的场景。

我们现在的物联网环境下,有部分数据,采样频率为2000条记录/分钟,这样下来一天24*60*2000=2880000约等于300万条数据,以后必然还会增加。之前数据库使用的是mssql,对于数据库的压力很大,同时又需要保证历史查询的响应速度,这种情况下,在单表中数据量大,同时存在读写操作。不得已采用MongoDB来存储数据。如果使用MongoDB,则至少需要三台机器,两台实现读写分离,一台作为仲裁(当然条件不允许也可以不用),每台机器的内存暂时配置在16G,公司小,没办法,据说,使用这个MongoDB需要机器内存最少92G,我没有验证过,但是吃内存是公认的,所以内存绝对要保证,就算保证了,也不一定完全就没有意外发生。我们上面的这些特殊的数据是允许少量的丢失的,这些只是做分析使用的,几个月了,暂时还没出现数据丢失的情况,可能最新版本早就修复了吧,新手使用建议多看下官网上的说明。下面直接奔入主题:

一、安装部署和配置环境

1.安装部署mongo-server(V3.4)

参考 点击这里进入

这个时候不要启动,接着配置config文件

2.配置Config文件

dbpath=C:/Program Files/MongoDB/Server/3.4/bin/data/db 
logpath=C:/Program Files/MongoDB/Server/3.4/bin/data/log/master.log 
pidfilepath=C:/Program Files/MongoDB/Server/3.4/bin/master.pid 
directoryperdb=true 
logappend=true 
replSet=testrs 
bind_ip=10.1.5.25
port=27016 
oplogSize=10000
noauth = true
 
storageEngine = wiredTiger
wiredTigerCacheSizeGB = 2
syncdelay = 30
wiredTigerCollectionBlockCompressor = snappy

以上是详细的配置参数,其中路径部分根据需要更改, 这里设置的oplogsize大小为10G,根据业务场景进行调整,另外auth权限为null,因为设置权限会增加服务开销,影响效率,最下面几行是内存引擎,可以控制副本集同步及内存限制,防止内存泄露。

3.启动mongo-server

4.添加副本集配置

conf=
{
  "_id" : "testrs",
  "members" : [
    { "_id" : 0, "host" : "10.1.5.25:27016" },
    { "_id" : 1, "host" : "10.1.5.26:27016" },
    { "_id" : 2, "host" : "10.1.5.27:27016" }
  ]
}

rs.initiate(conf)

此时副本集集群配置已经完成,然后在命令行中输入:rs.status(),查看副本集状态,需要查看同步情况,可以输入命令:db.serverStatus().

5.设置副本集可读写

Rs.slaveOk()

6..NET操作mongo

连接设置,请参考个人封装Unitoon.Mongo代码所示。

7.性能对比

读写速度:Redis>Mongo>Mssqlserver

可容纳数据量:Mssqlserver~Mongo>Redis

存储数据类型:Mongo>Mssqlserver>Redis

Note:内存持续上升,内部没有内存回收机制,若限制内存 ,则可能出现查询速度变慢,数据丢失等问题,建议优化查询效率,建立索引

Db.test.ensureIndex({"username":1, "age":-1})

强制释放内存命令:db.runCommand({closeAllDatabases:1})

二、仓储设计

1.基类BaseEntity

namespace UnitoonIot.Mongo

{

  /// <summary>

  /// 实体基类,方便生成ObjId

  /// </summary>

  [Serializable]

  [ProtoContract(ImplicitFields = ImplicitFields.AllPublic)]

  //[ProtoInclude(10, typeof(NormalHistory))]

  public class BaseEntity

  {

    //[BsonRepresentation(BsonType.ObjectId)]

    public ObjectId Id { get; set; }

  

    /// <summary>

    /// 数据库名称

    /// </summary>

    public string DbName { get; set; }

  

    /// <summary>

    /// 给对象初值

    /// </summary>

    public BaseEntity()

    {

      // this.ObjId = ObjectId.GenerateNewId().ToString();

      //this.Id = ObjectId.NewObjectId().ToString();

    }

  }

}

 

这里需要注意时间格式,MongoDB默认时间格式为国际时间,所以在写入数据时和读取数据时,时间格式要一致,此例中没有对时间进行特殊处理,由传入的时间格式确定。

2.Repository继承接口IMongoRepository

namespace UnitoonIot.Mongo
{
  public interface IMongoRepository where TEntity : class
  {
  }
}


3.MongoRepository

using MongoDB.Driver;

using MongoDB.Bson;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using System.Text;

using System.Threading.Tasks;

using MongoDB.Bson.Serialization.Attributes;

using MongoDB.Driver.Linq;

using System.Configuration;

using System.IO;

using UnitoonIot.AppSetting;

  

namespace UnitoonIot.Mongo

{

  

  public class MongoDb

  {

    private static string ConnectionStringHost ;

    private static string UserName ;

    private static string Password;

    private static IMongoDatabase _db = null;

    private static readonly object LockHelper = new object();

    /// <summary>

    /// mongodb初始化

    /// </summary>

    public static void Init()

    {

      ConnectionStringHost = "10.1.5.24:27016,10.1.5.24:27016,10.1.5.26:27017";

      //AppSettings.GetConfigValue("MongoHost");//"10.1.5.24:27016";

      UserName = AppSettings.GetConfigValue("MongoUserName");

      Password = AppSettings.GetConfigValue("MongoPwd");

    }

    static MongoDb()

    {

      

    }

    public static IMongoDatabase GetDb(string dbName,string options=null)

    {

      

      if (_db != null) return _db;

      lock (LockHelper)

      {

  

        if (_db != null) return _db;

        var database = dbName;

        var userName = UserName;

        var password = Password;

        var authentication = string.Empty;

        var host = string.Empty;

        if (!string.IsNullOrWhiteSpace(userName))

        {

          authentication = string.Concat(userName, ':', password, '@');

        }

        if (!string.IsNullOrEmpty(options) && !options.StartsWith("?"))

        {

          options = string.Concat('?', options);

        }

  

  

  

        host = string.IsNullOrEmpty(ConnectionStringHost) ? "localhost" : ConnectionStringHost;

        database = database ?? "testdb";

        //mongodb://[username:password@]host1[:port1][,host2[:port2],…[,hostN[:portN]]][/[database][?options]]

  

        var conString = options!=null? $"mongodb://{authentication}{host}/{database}{options}"

          : $"mongodb://{authentication}{host}/{database}";

  

        var url = new MongoUrl(conString);

        var mcs = MongoClientSettings.FromUrl(url);

        mcs.MaxConnectionLifeTime = TimeSpan.FromMilliseconds(1000);

        var client = new MongoClient(mcs);

                

        _db = client.GetDatabase(url.DatabaseName);

      }

      return _db;

    }

  }

  /// <summary>

  /// MongoDb 数据库操作类

  /// </summary>

  public class MongoRepository<T>: IMongoRepository<T> where T : BaseEntity

  {

    #region readonly field

    /// <summary>

    /// 表名

    /// </summary>

    private readonly IMongoCollection<T> _collection = null;

    /// <summary>

    /// 数据库对象

    /// </summary>

    private readonly IMongoDatabase _database;

    #endregion

  

    /// <summary>

    /// 构造函数

    /// </summary>

    public MongoRepository()

    {

      this._database = MongoDb.GetDb(Activator.CreateInstance<T>().DbName, "readPreference =secondaryPreferred ");//primaryPreferred/secondaryPreferred/nearest

      _collection = _database.GetCollection<T>(typeof(T).Name);

    }

    

  

    #region 增加

    /// <summary>

    /// 插入对象

    /// </summary>

    /// <param name="t">插入的对象</param>

    public virtual T Insert(T t)

    {

      // var flag = ObjectId.GenerateNewId();

      // t.GetType().GetProperty("Id").SetValue(t, flag); 

      //t.Time = DateTime.Now;

  

      _collection.InsertOne(t);

      return t;

    }

    /// <summary>

    /// 批量插入

    /// </summary>

    /// <param name="ts">要插入的对象集合</param>

    public virtual IEnumerable<T> InsertBatch(IEnumerable<T> ts)

    {

      _collection.InsertMany(ts);

      return ts;

    }

  

    /// <summary>

    /// 插入对象

    /// </summary>

    /// <param name="t">插入的对象</param>

    public virtual void InsertAsync(T t)

    {

      //var flag = ObjectId.GenerateNewId();

      // t.GetType().GetProperty("Id").SetValue(t, flag);

      // t.Time = DateTime.Now;

       _collection.InsertOneAsync(t);

    }

    /// <summary>

    /// 批量插入

    /// </summary>

    /// <param name="ts">要插入的对象集合</param>

    public virtual void InsertBatchAsync(IEnumerable<T> ts)

    {

       _collection.InsertManyAsync(ts);

    }

    #endregion

  

    #region 删除

    /// <summary>

    /// 删除

    /// </summary>

    /// <returns></returns>

    public virtual long Delete(T t)

    {

      var filter = Builders<T>.Filter.Eq("Id", t.Id);

      var result = _collection.DeleteOne(filter);

      return result.DeletedCount;    

    }

    /// <summary>

    /// 删除

    /// </summary>

    /// <returns></returns>

    public virtual void DeleteAsync(T t)

    {

      var filter = Builders<T>.Filter.Eq("Id", t.Id);

      _collection.DeleteOneAsync(filter);

    }

  

    /// <summary>

    /// 按条件表达式删除

    /// </summary>

    /// <param name="predicate">条件表达式</param>

    /// <returns></returns>

    public virtual long Delete(Expression<Func<T, bool>> predicate)

    {

      var result = _collection.DeleteOne(predicate);

      return result.DeletedCount;

    }

    /// <summary>

    /// 按条件表达式删除

    /// </summary>

    /// <param name="predicate">条件表达式</param>

    /// <returns></returns>

    public virtual void DeleteAsync(Expression<Func<T, bool>> predicate)

    {

      _collection.DeleteOneAsync(predicate);

    }

  

  

    /// <summary>

    /// 按条件表达式批量删除

    /// </summary>

    /// <param name="predicate">条件表达式</param>

    /// <returns></returns>

    public virtual long DeleteBatch(Expression<Func<T, bool>> predicate)

    {

      var result = _collection.DeleteMany(predicate);

      return result.DeletedCount;

    }

    /// <summary>

    /// 按条件表达式批量删除

    /// </summary>

    /// <param name="predicate">条件表达式</param>

    /// <returns></returns>

    public virtual void DeleteBatchAsync(Expression<Func<T, bool>> predicate)

    {

       _collection.DeleteManyAsync(predicate);

    }

  

    /// <summary>

    /// 按检索条件删除

    /// 建议用Builders<T>构建复杂的查询条件

    /// </summary>

    /// <param name="filter">条件</param>

    /// <returns></returns>

    public virtual long Delete(FilterDefinition<T> filter)

    {

      var result = _collection.DeleteOne(filter);

      return result.DeletedCount;

    }

  

    /// <summary>

    /// 按检索条件删除

    /// 建议用Builders<T>构建复杂的查询条件

    /// </summary>

    /// <param name="filter">条件</param>

    /// <returns></returns>

    public virtual void DeleteAsync(FilterDefinition<T> filter)

    {

       _collection.DeleteOneAsync(filter);

    }

    #endregion

  

    #region 修改

    /// <summary>

    /// 修改(Id不变)

    /// </summary> 

    /// <returns></returns>

    public virtual long Update(T t)

    {    

      var filterBuilder = Builders<T>.Filter;

      var filter = filterBuilder.Eq("Id",t.Id);

      var update = _collection.ReplaceOne(filter, t, new UpdateOptions() { IsUpsert = true });

      return update.ModifiedCount;

    }

    /// <summary>

    /// 修改(Id不变)

    /// </summary> 

    /// <returns></returns>

    public virtual void UpdateAsync(T t)

    {

      var filterBuilder = Builders<T>.Filter;

      var filter = filterBuilder.Eq("Id", t.Id);

       _collection.ReplaceOneAsync(filter, t, new UpdateOptions() { IsUpsert = true });

        

    }

  

  

    /// <summary>

    /// 用新对象替换新文档

    /// </summary>

    /// <param name="filter">查询条件</param>

    /// <param name="t">对象</param>

    /// <returns>修改影响文档数</returns>

    public virtual long Update(Expression<Func<T, bool>> filter, T t)

    {

      var update = _collection.ReplaceOne(filter, t, new UpdateOptions() { IsUpsert = true });

      return update.ModifiedCount;

    }

  

  

    /// <summary>

    /// 用新对象替换新文档

    /// </summary>

    /// <param name="filter">查询条件</param>

    /// <param name="t">对象</param>

    /// <returns>修改影响文档数</returns>

    public virtual long Update(FilterDefinition<T> filter, T t)

    {

      var update = _collection.ReplaceOne(filter, t, new UpdateOptions() { IsUpsert = true });

      return update.ModifiedCount;

    }

    /// <summary>

    /// 用新对象替换新文档

    /// </summary>

    /// <param name="filter">查询条件</param>

    /// <param name="t">对象</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateAsync(Expression<Func<T, bool>> filter, T t)

    {

      _collection.ReplaceOneAsync(filter, t, new UpdateOptions() { IsUpsert = true });

       

    }

    /// <summary>

    /// 用新对象替换新文档

    /// </summary>

    /// <param name="filter">查询条件</param>

    /// <param name="t">对象</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateAsync(FilterDefinition<T> filter, T t)

    {

       _collection.ReplaceOneAsync(filter, t, new UpdateOptions() { IsUpsert = true });

        

    }

    /// <summary>

    /// 根据Id和条件文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="id">对象Id</param>

    /// <returns>修改影响文档数</returns>

    public virtual long Update(string id, UpdateDefinition<T> update)

    {

      var filterBuilder = Builders<T>.Filter;

      var filter = filterBuilder.Eq("Id", new ObjectId(id));

      var result = _collection.UpdateOne(filter, update, new UpdateOptions() { IsUpsert = true });

      return result.ModifiedCount;

    }

    /// <summary>

    /// 根据Id和条件文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="id">对象Id</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateAsync(string id, UpdateDefinition<T> update)

    {

      var filterBuilder = Builders<T>.Filter;

      var filter = filterBuilder.Eq("Id", new ObjectId(id));

      _collection.UpdateOneAsync(filter, update, new UpdateOptions() { IsUpsert = true });   

    }

    /// <summary>

    /// 根据条件修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual void Update(UpdateDefinition<T> update,Expression<Func<T, bool>> filter)

    {

      _collection.UpdateOne(filter, update, new UpdateOptions() { IsUpsert = true });

    }

    /// <summary>

    /// 根据条件修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual long Update(UpdateDefinition<T> update, FilterDefinition<T> filter)

    {

      var result = _collection.UpdateOne(filter, update, new UpdateOptions() { IsUpsert = true });

      return result.ModifiedCount;

    }

    /// <summary>

    /// 根据条件修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateAsync(UpdateDefinition<T> update, Expression<Func<T, bool>> filter)

    {

      _collection.UpdateOneAsync(filter, update, new UpdateOptions() { IsUpsert = true });

    }

    /// <summary>

    /// 根据条件修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateAsync(UpdateDefinition<T> update, FilterDefinition<T> filter)

    {

       _collection.UpdateOneAsync(filter, update, new UpdateOptions() { IsUpsert = true });

    }

  

    /// <summary>

    /// 根据条件批量修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual long UpdateBatch(UpdateDefinition<T> update, Expression<Func<T, bool>> filter)

    {

      var result = _collection.UpdateMany(filter, update, new UpdateOptions() { IsUpsert = true });

      return result.ModifiedCount;

    }

  

    /// <summary>

    /// 根据条件批量修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual long UpdateBatch(UpdateDefinition<T> update, FilterDefinition<T> filter)

    {

      var result = _collection.UpdateMany(filter, update, new UpdateOptions() { IsUpsert = true });

      return result.ModifiedCount;

    }

    /// <summary>

    /// 根据条件批量修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateBatchAsync(UpdateDefinition<T> update, Expression<Func<T, bool>> filter)

    {

       _collection.UpdateManyAsync(filter, update, new UpdateOptions() { IsUpsert = true });

    }

  

    /// <summary>

    /// 根据条件批量修改文档

    /// </summary>

    /// <param name="update">修改条件-形如:Builders/<T/>.Update.Set(filed, value)</param>

    /// <param name="filter">查询条件Builders/<T/>.Filter.Eq(filed, value)</param>

    /// <returns>修改影响文档数</returns>

    public virtual void UpdateBatchAsync(UpdateDefinition<T> update, FilterDefinition<T> filter)

    {

      _collection.UpdateManyAsync(filter, update, new UpdateOptions() { IsUpsert = true });

    }

    #endregion

  

    #region 查询

  

    #region GetCollection

  

    /// <summary>

    /// 获取操作对象的IMongoCollection集合,强类型对象集合

    /// </summary>

    /// <returns></returns>

    public virtual IMongoCollection<T> GetCollection()

    {

      return _database.GetCollection<T>(typeof(T).Name);

    }

  

    #endregion

  

    #region GetSingle

    /// <summary>

    /// 查询数据库,检查是否存在指定ID的对象

    /// </summary>

    /// <param name="id">对象的ID值</param>

    /// <returns>存在则返回指定的对象,否则返回Null</returns>

    public virtual T GetById(string id)

    {

      var filterBuilder = Builders<T>.Filter;

      var filter = filterBuilder.Eq("Id", new ObjectId(id));

      var data = _collection.Find(filter).FirstOrDefault();

      return data;

    }

    /// <summary>

    /// 查询数据库,检查是否存在指定ID的对象

    /// </summary>

    /// <param name="id">对象的ID值</param>

    /// <returns>存在则返回指定的对象,否则返回Null</returns>

    public virtual async Task<T> GetAsyncById(string id)

    {

      var filterBuilder = Builders<T>.Filter;

      var filter = filterBuilder.Eq("Id", new ObjectId(id));

      var data = await _collection.FindAsync(filter);

      return await data.SingleOrDefaultAsync();

    }

    /// <summary>

    /// 查询数据

    /// </summary>

    /// <param name="filter">过滤条件</param>

    /// <returns></returns>

    public virtual T Get(FilterDefinition<T> filter)

    {

      return _collection.Find(filter).FirstOrDefault();

    }

    /// <summary>

    /// 查询数据

    /// </summary>

    /// <param name="filter">条件表达式</param>

    /// <returns></returns>

    public virtual T Get(Expression<Func<T,bool>> filter)

    {

      return _collection.Find(filter).FirstOrDefault();

    }

    /// <summary>

    /// 查询数据

    /// </summary>

    /// <param name="filter">过滤条件</param>

    /// <returns></returns>

    public virtual async Task<T> GetAsync(FilterDefinition<T> filter)

    {

      var data = await _collection.FindAsync(filter);

      return await data.SingleOrDefaultAsync();

    }

    /// <summary>

    /// 查询数据

    /// </summary>

    /// <param name="filter">条件表达式</param>

    /// <returns></returns>

    public virtual async Task<T> GetAsync(Expression<Func<T, bool>> filter)

    {

      var data = await _collection.FindAsync(filter);

      return await data.SingleOrDefaultAsync();

    }

  

  

    #endregion

  

    #region GetMany

    /// <summary>

    /// 查询部分数据

    /// </summary>

    /// <param name="filter">过滤条件</param>

    /// <returns></returns>

    public virtual IEnumerable<T> GetMany(FilterDefinition<T> filter)

    {

      return _collection.Find(filter).ToEnumerable();

    }

  

    /// <summary>

    /// 查询部分数据

    /// </summary>

    /// <param name="filter">条件表达式</param>

    /// <returns></returns>

    public virtual IEnumerable<T> GetMany(Expression<Func<T,bool>> filter)

    {

      //return _collection.AsQueryable().Where(filter).ToList();

      //return _collection.AsQueryable().Where(filter);

      return _collection.Find(filter).ToEnumerable(); //.ToEnumerable();

    }

  

    /// <summary>

    /// 查询部分数据

    /// </summary>

    /// <param name="filter">过滤条件</param>

    /// <returns></returns>

    public virtual async Task<IEnumerable<T>> GetManyAsync(FilterDefinition<T> filter)

    {

      var data = await _collection.FindAsync(filter);

      return await data.ToListAsync();

    }

  

    /// <summary>

    /// 查询部分数据

    /// </summary>

    /// <param name="filter">过滤条件</param>

    /// <returns></returns>

    public virtual async Task<IEnumerable<T>> GetManyAsync(Expression<Func<T, bool>> filter)

    {

      var data = await _collection.FindAsync(filter);

      return await data.ToListAsync();

    }

      

    #endregion

  

    #region GetAll

  

    /// <summary>

    /// 查询所有记录,复杂查询直接用Linq处理(避免全表扫描)

    /// </summary>

    /// <returns>要查询的对象</returns>

    public virtual IEnumerable<T> GetAll()

    {

      var data = _collection.AsQueryable();

      return data.ToEnumerable();

    }

    /// <summary>

    /// 查询所有记录,复杂查询直接用Linq处理(避免全表扫描)

    /// </summary>

    /// <returns>要查询的对象</returns>

    public virtual async Task<IEnumerable<T>> GetAllAsync()

    {

      var data = _collection.AsQueryable();

      return await data.ToListAsync();

    }

  

    /// <summary>

    /// 查询所有记录,复杂查询直接用Linq处理(避免全表扫描)

    /// </summary>

    /// <returns>要查询的对象</returns>

    public virtual IQueryable<T> GetAllQueryable()

    {

      return _collection.AsQueryable();

    }

  

    #endregion

  

    #region MapReduce

    /// <summary>

    /// MapReduce

    /// </summary>  

    /// <returns>返回一个List列表数据</returns>

    public IEnumerable<T> GetMap(BsonJavaScript map,BsonJavaScript reduce)

    {

      return _collection.MapReduce<T>(map,reduce).ToList();

    }

  

  

    #endregion

  

    #endregion

  }

  

}

 

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