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SqlServer与MongoDB结合使用NHibernate

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文实例为大家分享了SqlServer与MongoDB结合使用NHibernate的代码，供大家参考，具体内容如下

Program.cs代码内容:

class Program 
 { 
   private const string SqlServerConnectionString = 
     @"Data Source=.;Initial Catalog=SqlWithMongo;Persist Security Info=True;User ID=sa;Password=123456"; 
 
   private const string MongoConnectionString = "mongodb://localhost:27017"; 
   private const int NumberOfNodes = 1000; 
 
   private static void Main(string[] args) 
   { 
     Console.WriteLine("Clearing database..."); 
     ClearDatabases(); 
     Initer.Init(SqlServerConnectionString, MongoConnectionString); 
     Console.WriteLine("Completed"); 
 
     Console.WriteLine("Creating nodes..."); 
     //创建sqlserver的Node节点 
     CreateNodes(); 
     Console.WriteLine("Completed"); 
 
     Console.WriteLine("Linking nodes..."); 
     long milliseconds1 = LinkSqlNodes(); //创建sqlserver的LinkNode节点 
     Console.WriteLine("SQL : " + milliseconds1); 
     long milliseconds2 = LinkMongoNodes(); //同时创建Node,LinkNode节点 
     Console.WriteLine("Mongo : " + milliseconds2); 
     Console.WriteLine("Completed"); 
 
     Console.WriteLine("Fetching nodes..."); 
     long milliseconds3 = FetchSqlNodes(); //取出sqlserver节点数据 
     Console.WriteLine("SQL : " + milliseconds3); 
     long milliseconds4 = FetchMongoNodes(); //取出Mongodb节点数据 
     Console.WriteLine("Mongo : " + milliseconds4); 
     Console.WriteLine("Completed"); 
 
     Console.ReadKey(); 
   } 
 
 
   private static long FetchMongoNodes() 
   { 
     var stopwatch = new Stopwatch(); 
     stopwatch.Start(); 
 
     for (int i = 0; i < NumberOfNodes; i++) 
     { 
       using (var unitOfWork = new UnitOfWork()) 
       { 
         var repository = new MongoNodeRepository(unitOfWork); 
 
         MongoNode node = repository.GetById(i + 1); 
         IReadOnlyList<NodeLink> links = node.Links; 
       } 
     } 
     stopwatch.Stop(); 
     return stopwatch.ElapsedMilliseconds; 
   } 
 
 
   private static long FetchSqlNodes() 
   { 
     var stopwatch = new Stopwatch(); 
     stopwatch.Start(); 
 
     for (int i = 0; i < NumberOfNodes; i++) 
     { 
       using (var unitOfWork = new UnitOfWork()) 
       { 
         var repository = new NodeRepository(unitOfWork); 
 
         Node node = repository.GetById(i + 1); 
         IReadOnlyList<Node> links = node.Links; 
       } 
     } 
 
     stopwatch.Stop(); 
     return stopwatch.ElapsedMilliseconds; 
   } 
 
 
   private static long LinkSqlNodes() 
   { 
     var stopwatch = new Stopwatch(); 
     stopwatch.Start(); 
 
     using (var unitOfWork = new UnitOfWork()) 
     { 
       var repository = new NodeRepository(unitOfWork); 
 
       IList<Node> nodes = repository.GetAll(); 
       foreach (Node node1 in nodes) 
       { 
         foreach (Node node2 in nodes) 
         { 
           node1.AddLink(node2); 
         } 
       } 
       unitOfWork.Commit(); 
     } 
 
     stopwatch.Stop(); 
     return stopwatch.ElapsedMilliseconds; 
   } 
 
 
   private static long LinkMongoNodes() 
   { 
     var stopwatch = new Stopwatch(); 
     stopwatch.Start(); 
 
     using (var unitOfWork = new UnitOfWork()) 
     { 
       var repository = new MongoNodeRepository(unitOfWork); 
 
       IList<MongoNode> nodes = repository.GetAll(); 
       foreach (MongoNode node1 in nodes) 
       { 
         foreach (MongoNode node2 in nodes) 
         { 
           node1.AddLink(node2); 
         } 
       } 
       unitOfWork.Commit(); 
     } 
 
     stopwatch.Stop(); 
     return stopwatch.ElapsedMilliseconds; 
   } 
 
 
   private static void CreateNodes() 
   { 
     using (var unitOfWork = new UnitOfWork()) 
     { 
       var repository = new NodeRepository(unitOfWork); 
 
       for (int i = 0; i < NumberOfNodes; i++) 
       { 
         var node = new Node("Node " + (i + 1)); //实例化 构造函数初始化name 
         repository.Save(node); 
       } 
 
       unitOfWork.Commit(); 
     } 
 
     using (var unitOfWork = new UnitOfWork()) 
     { 
       var repository = new MongoNodeRepository(unitOfWork); 
 
       for (int i = 0; i < NumberOfNodes; i++) 
       { 
         var node = new MongoNode("Node " + (i + 1)); 
         repository.Save(node); 
       } 
 
       unitOfWork.Commit(); 
     } 
   } 
 
   //清空数据 
   private static void ClearDatabases() 
   { 
     new MongoClient(MongoConnectionString) 
       .GetDatabase("sqlWithMongo") 
       .DropCollectionAsync("links") 
       .Wait(); 
 
     string query = "DELETE FROM [dbo].[MongoNode];" + 
             "DELETE FROM [dbo].[Node_Node];" + 
             "DELETE FROM [dbo].[Node];" + 
             "UPDATE [dbo].[Ids] SET [NextHigh] = 0"; 
 
     using (var connection = new SqlConnection(SqlServerConnectionString)) 
     { 
       var command = new SqlCommand(query, connection) 
       { 
         CommandType = CommandType.Text 
       }; 
 
       connection.Open(); 
       command.ExecuteNonQuery(); 
     } 
   } 
 }

相关辅助类代码如下:

public static class Initer 
 { 
   public static void Init(string sqlServerConnectionString, string mongoConnectionString) 
   { 
     //SqlServer初始化 
     SessionFactory.Init(sqlServerConnectionString); 
     //Mongodb初始化 
     NodeLinkRepository.Init(mongoConnectionString); 
   } 
 } 

public static class SessionFactory //工厂 
  { 
    private static ISessionFactory _factory; 
 
 
    internal static ISession OpenSession() 
    { 
      return _factory.OpenSession(new Interceptor()); 
    } 
 
 
    internal static void Init(string connectionString) 
    { 
      _factory = BuildSessionFactory(connectionString); 
    } 
 
 
    private static ISessionFactory BuildSessionFactory(string connectionString) 
    { 
      //用编程的方式进行配置，让你能更好的理解，不需要编写复杂的映射文件，它能完全替换NHibernate的映射文件，让你在映射的时候能使用C#的强类型方式。 
      FluentConfiguration configuration = Fluently.Configure() 
        .Database(MsSqlConfiguration.MsSql2012.ConnectionString(connectionString)) 
        .Mappings(m => m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly())) 
        .ExposeConfiguration(x => 
        { 
          x.EventListeners.PostLoadEventListeners = new IPostLoadEventListener[] 
          { 
            new EventListener() 
          }; 
        }); 
 
      return configuration.BuildSessionFactory(); 
    } 
  } 

internal class NodeLinkRepository //仓库 Repository模式 
  { 
    private static IMongoCollection<NodeLinks> _collection; 
 
 
    public IList<NodeLink> GetLinks(int nodeId) 
    { 
      NodeLinks links = _collection.Find(x => x.Id == nodeId).SingleOrDefaultAsync().Result; 
       
      if (links == null) 
        return new NodeLink[0]; 
 
      return links.Links; 
    } 
 
 
    public Task SaveLinks(int nodeId, IEnumerable<NodeLink> links) 
    { 
      var nodeLinks = new NodeLinks(nodeId, links); 
      var updateOptions = new UpdateOptions 
      { 
        IsUpsert = true 
      }; 
 
      return _collection.ReplaceOneAsync(x => x.Id == nodeId, nodeLinks, updateOptions); 
    } 
 
 
    internal static void Init(string connectionString) 
    { 
      var client = new MongoClient(connectionString); 
      IMongoDatabase database = client.GetDatabase("sqlWithMongo"); 
      var collectionSettings = new MongoCollectionSettings 
      { 
        WriteConcern = new WriteConcern(1) 
      }; 
      _collection = database.GetCollection<NodeLinks>("links", collectionSettings); 
    } 
 
 
    private class NodeLinks 
    { 
      public int Id { get; private set; } 
      public List<NodeLink> Links { get; private set; } 
 
 
      public NodeLinks(int nodeId, IEnumerable<NodeLink> links) 
      { 
        Id = nodeId; 
        Links = new List<NodeLink>(); 
        Links.AddRange(links); 
      } 
    } 
  } 

public class NodeRepository 
  { 
    private readonly UnitOfWork _unitOfWork; 
 
 
    public NodeRepository(UnitOfWork unitOfWork) 
    { 
      _unitOfWork = unitOfWork; 
    } 
 
 
    public Node GetById(int id) 
    { 
      return _unitOfWork.Get<Node>(id); 
    } 
 
 
    public IList<Node> GetAll() 
    { 
      return _unitOfWork.Query<Node>() 
        .ToList(); 
    } 
 
 
    public void Save(Node mongoNode) 
    { 
      _unitOfWork.SaveOrUpdate(mongoNode); 
    } 
  } 

public class MongoNodeRepository 
  { 
    private readonly UnitOfWork _unitOfWork; 
 
 
    public MongoNodeRepository(UnitOfWork unitOfWork) 
    { 
      _unitOfWork = unitOfWork; 
    } 
 
 
    public MongoNode GetById(int id) 
    { 
      return _unitOfWork.Get<MongoNode>(id); 
    } 
 
 
    public void Save(MongoNode mongoNode) 
    { 
      _unitOfWork.SaveOrUpdate(mongoNode); 
    } 
 
 
    public IList<MongoNode> GetAll() 
    { 
      return _unitOfWork.Query<MongoNode>() 
        .ToList(); 
    } 
  }

模型层数据:
Node.cs，NodeMap.cs类代码如下:

public class Node 
  { 
    public virtual int Id { get; protected set; } 
    public virtual string Name { get; protected set; } 
 
    protected virtual ISet<Node> LinksInternal { get; set; } 
    public virtual IReadOnlyList<Node> Links 
    { 
      get { return LinksInternal.ToList(); } 
    } 
 
 
    protected Node() 
    { 
      LinksInternal = new HashSet<Node>(); 
    } 
 
 
    public Node(string name) 
      : this() 
    { 
      Name = name; 
    } 
 
 
    public virtual void AddLink(Node node) 
    { 
      LinksInternal.Add(node); 
      node.LinksInternal.Add(this); 
    } 
  } 

public class NodeMap : ClassMap<Node> //FluentNHibernate.Mapping.ClasslikeMapBase<T> 
  { 
    public NodeMap() 
    { 
      Id(x => x.Id, "NodeId").GeneratedBy.HiLo("[dbo].[Ids]", "NextHigh", "10", "EntityName = 'Node'"); 
      Map(x => x.Name).Not.Nullable(); 
 
      HasManyToMany<Node>(Reveal.Member<Node>("LinksInternal")) 
        .AsSet() 
        .Table("Node_Node") 
        .ParentKeyColumn("NodeId1") 
        .ChildKeyColumn("NodeId2"); 
    } 
  }

MongoNode.cs和MongoNodeMap.cs的代码如下:

public class MongoNode 
 { 
   public virtual int Id { get; protected set; } 
   public virtual string Name { get; protected set; } 
 
   protected virtual HashSet<NodeLink> LinksInternal { get; set; } 
   public virtual IReadOnlyList<NodeLink> Links 
   { 
     get { return LinksInternal.ToList(); } 
   } 
 
 
   protected MongoNode() 
   { 
     LinksInternal = new HashSet<NodeLink>(); 
   } 
 
 
   public MongoNode(string name) 
     : this() 
   { 
     Name = name; 
   } 
 
 
   public virtual void AddLink(MongoNode mongoNode) 
   { 
     LinksInternal.Add(new NodeLink(mongoNode.Id, mongoNode.Name)); 
     mongoNode.LinksInternal.Add(new NodeLink(Id, Name)); 
   } 
 } 

public class MongoNodeMap : ClassMap<MongoNode> //FluentNHibernate中的类继承 
  { 
    public MongoNodeMap() 
    { 
      Id(x => x.Id, "MongoNodeId").GeneratedBy.HiLo("[dbo].[Ids]", "NextHigh", "10", "EntityName = 'MongoNode'"); 
      Map(x => x.Name).Not.Nullable(); 
    } 
  }

Utils层的类:
EventListener.cs内容:

internal class EventListener : IPostLoadEventListener //NHibernate.Event继承 
  { 
    public void OnPostLoad(PostLoadEvent ev) 
    { 
      var networkNode = ev.Entity as MongoNode; 
 
      if (networkNode == null) 
        return; 
 
      var repository = new NodeLinkRepository(); 
      IList<NodeLink> linksFromMongo = repository.GetLinks(networkNode.Id); 
 
      HashSet<NodeLink> links = (HashSet<NodeLink>)networkNode 
        .GetType() 
        .GetProperty("LinksInternal", BindingFlags.NonPublic | BindingFlags.Instance) 
        .GetValue(networkNode); 
      links.UnionWith(linksFromMongo); 
    } 
  } 

internal class Interceptor : EmptyInterceptor //NHibernate中的类 
 { 
   public override void PostFlush(ICollection entities) 
   { 
     IEnumerable<MongoNode> nodes = entities.OfType<MongoNode>(); 
 
     if (!nodes.Any()) 
       return; 
 
     var repository = new NodeLinkRepository(); 
     Task[] tasks = nodes.Select(x => repository.SaveLinks(x.Id, x.Links)).ToArray(); 
     Task.WaitAll(tasks); 
   } 
 }

UnitOfWork.cs代码:

public class UnitOfWork : IDisposable 
 { 
   private readonly ISession _session; 
   private readonly ITransaction _transaction; 
   private bool _isAlive = true; 
   private bool _isCommitted; 
 
   public UnitOfWork() 
   { 
     _session = SessionFactory.OpenSession(); 
     _transaction = _session.BeginTransaction(IsolationLevel.ReadCommitted); 
   } 
 
 
   public void Dispose() 
   { 
     if (!_isAlive) 
       return; 
 
     _isAlive = false; 
 
     try 
     { 
       if (_isCommitted) 
       { 
         _transaction.Commit(); 
       } 
     } 
     finally 
     { 
       _transaction.Dispose(); 
       _session.Dispose(); 
     } 
   } 
    
   public void Commit() 
   { 
     if (!_isAlive) 
       return; 
 
     _isCommitted = true; 
   } 
 
 
   internal T Get<T>(int id) 
   { 
     return _session.Get<T>(id); 
   } 
 
 
   internal void SaveOrUpdate<T>(T entity) 
   { 
     _session.SaveOrUpdate(entity); 
   } 
 
 
   internal IQueryable<T> Query<T>() 
   { 
     return _session.Query<T>(); 
   } 
 }

Database.sql建表语句:

CREATE DATABASE [SqlWithMongo] 
GO 
USE [SqlWithMongo] 
GO 
/****** 表 [dbo].[Ids] ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE TABLE [dbo].[Ids]( 
  [EntityName] [nvarchar](100) NOT NULL, 
  [NextHigh] [int] NOT NULL, 
 CONSTRAINT [PK_Ids] PRIMARY KEY CLUSTERED  
( 
  [EntityName] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 
 
GO 
/****** 表 [dbo].[MongoNode] ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE TABLE [dbo].[MongoNode]( 
  [MongoNodeId] [int] NOT NULL, 
  [Name] [nvarchar](100) NOT NULL, 
 CONSTRAINT [PK_MongoNode] PRIMARY KEY CLUSTERED  
( 
  [MongoNodeId] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 
 
GO 
/****** 表 [dbo].[Node] ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE TABLE [dbo].[Node]( 
  [NodeId] [int] NOT NULL, 
  [Name] [nvarchar](100) NOT NULL, 
 CONSTRAINT [PK_NetworkNode] PRIMARY KEY CLUSTERED  
( 
  [NodeId] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 
 
GO 
/****** 表 [dbo].[Node_Node] ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE TABLE [dbo].[Node_Node]( 
  [NodeId1] [int] NOT NULL, 
  [NodeId2] [int] NOT NULL, 
 CONSTRAINT [PK_NetworkNode_NetworkNode] PRIMARY KEY CLUSTERED  
( 
  [NodeId1] ASC, 
  [NodeId2] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 
 
GO 
ALTER TABLE [dbo].[Node_Node] WITH CHECK ADD CONSTRAINT [FK_NetworkNode_NetworkNode_NetworkNode] FOREIGN KEY([NodeId1]) 
REFERENCES [dbo].[Node] ([NodeId]) 
GO 
ALTER TABLE [dbo].[Node_Node] CHECK CONSTRAINT [FK_NetworkNode_NetworkNode_NetworkNode] 
GO 
ALTER TABLE [dbo].[Node_Node] WITH CHECK ADD CONSTRAINT [FK_NetworkNode_NetworkNode_NetworkNode1] FOREIGN KEY([NodeId2]) 
REFERENCES [dbo].[Node] ([NodeId]) 
GO 
ALTER TABLE [dbo].[Node_Node] CHECK CONSTRAINT [FK_NetworkNode_NetworkNode_NetworkNode1] 
GO 
 
INSERT dbo.Ids (EntityName, NextHigh) 
VALUES ('MongoNode', 0) 
INSERT dbo.Ids (EntityName, NextHigh) 
VALUES ('Node', 0)

结果如图:

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持极客世界。

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