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tk
2024-11-13 18:18:28 +08:00
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41
FreeSql.DbContext/UnitOfWork/IUnitOfWork.cs Normal file
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using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
namespace FreeSql
{
/// <summary>
/// 工作单元
/// </summary>
public interface IUnitOfWork : IDisposable
{
/// <summary>
/// 该对象 Select/Delete/Insert/Update/InsertOrUpdate 与工作单元事务保持一致，可省略传递 WithTransaction
/// </summary>
IFreeSql Orm { get; }
/// <summary>
/// 开启事务，或者返回已开启的事务
/// </summary>
/// <param name="isCreate">若未开启事务，则开启</param>
/// <returns></returns>
DbTransaction GetOrBeginTransaction(bool isCreate = true);
IsolationLevel? IsolationLevel { get; set; }
void Commit();
void Rollback();
/// <summary>
/// 工作单元内的实体变化跟踪
/// </summary>
DbContext.EntityChangeReport EntityChangeReport { get; }
/// <summary>
/// 用户自定义的状态数据，便于扩展
/// </summary>
Dictionary<string, object> States { get; }
}
}

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FreeSql.DbContext/UnitOfWork/UnitOfWork.cs Normal file
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using FreeSql.Internal.ObjectPool;
using System;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Data;
using System.Data.Common;
using System.Linq;
using System.Threading;
namespace FreeSql
{
public class UnitOfWork : IUnitOfWork
{
static int _seed;
/// <summary>
/// 正在使用中的工作单元（调试）
/// </summary>
public static ConcurrentDictionary<string, UnitOfWork> DebugBeingUsed { get; } = new ConcurrentDictionary<string, UnitOfWork>();
protected IFreeSql _fsql;
protected Object<DbConnection> _conn;
protected DbTransaction _tran;
protected Aop.TraceBeforeEventArgs _tranBefore;
protected Aop.TraceBeforeEventArgs _uowBefore;
/// <summary>
/// 开启事务后有值，是 UnitOfWork 的唯一标识<para></para>
/// 格式：yyyyMMdd_HHmmss_种子id<para></para>
/// 例如：20191121_214504_1
/// </summary>
public string Id { get; private set; }
public UnitOfWork(IFreeSql fsql)
{
_fsql = fsql;
if (_fsql == null) throw new ArgumentNullException(nameof(fsql));
_uowBefore = new Aop.TraceBeforeEventArgs("UnitOfWork", null);
_fsql.Aop.TraceBeforeHandler?.Invoke(this, _uowBefore);
}
void ReturnObject()
{
if (string.IsNullOrEmpty(this.Id) == false && DebugBeingUsed.TryRemove(this.Id, out var old))
this.Id = null;
_fsql.Ado.MasterPool.Return(_conn);
_tran = null;
_conn = null;
EntityChangeReport?.Report.Clear();
}
public bool Enable { get; private set; } = true;
public void Close()
{
if (_tran != null)
throw new Exception(DbContextStrings.TransactionHasBeenStarted);
Enable = false;
}
public void Open()
{
Enable = true;
}
DbContextScopedFreeSql _ormScoped;
public IFreeSql Orm => _ormScoped ?? (_ormScoped = DbContextScopedFreeSql.Create(_fsql, null, () => this));
public IsolationLevel? IsolationLevel { get; set; }
public DbTransaction GetOrBeginTransaction(bool isCreate = true)
{
if (_tran != null) return _tran;
if (isCreate == false) return null;
if (!Enable) return null;
if (_conn != null) _fsql.Ado.MasterPool.Return(_conn);
_tranBefore = new Aop.TraceBeforeEventArgs("BeginTransaction", IsolationLevel);
_fsql?.Aop.TraceBeforeHandler?.Invoke(this, _tranBefore);
try
{
_conn = _fsql.Ado.MasterPool.Get();
try
{
_tran = IsolationLevel == null ?
_conn.Value.BeginTransaction() :
_conn.Value.BeginTransaction(IsolationLevel.Value);
this.Id = $"{DateTime.Now.ToString("yyyyMMdd_HHmmss")}_{Interlocked.Increment(ref _seed)}";
DebugBeingUsed.TryAdd(this.Id, this);
}
catch
{
ReturnObject();
throw;
}
}
catch (Exception ex)
{
_fsql?.Aop.TraceAfterHandler?.Invoke(this, new Aop.TraceAfterEventArgs(_tranBefore, "失败", ex));
#pragma warning disable CA2200 // 再次引发以保留堆栈详细信息
throw ex;
#pragma warning restore CA2200 // 再次引发以保留堆栈详细信息
}
return _tran;
}
public void Commit()
{
var isCommited = false;
try
{
if (_tran != null)
{
if (_tran.Connection != null) _tran.Commit();
isCommited = true;
_fsql?.Aop.TraceAfterHandler?.Invoke(this, new Aop.TraceAfterEventArgs(_tranBefore, "提交", null));
if (EntityChangeReport != null && EntityChangeReport.OnChange != null && EntityChangeReport.Report.Any() == true)
EntityChangeReport.OnChange.Invoke(EntityChangeReport.Report);
}
}
catch (Exception ex)
{
if (isCommited == false)
_fsql?.Aop.TraceAfterHandler?.Invoke(this, new Aop.TraceAfterEventArgs(_tranBefore, "提交失败", ex));
#pragma warning disable CA2200 // 再次引发以保留堆栈详细信息
throw ex;
#pragma warning restore CA2200 // 再次引发以保留堆栈详细信息
}
finally
{
ReturnObject();
_tranBefore = null;
}
}
public void Rollback()
{
var isRollbacked = false;
try
{
if (_tran != null)
{
if (_tran.Connection != null) _tran.Rollback();
isRollbacked = true;
_fsql?.Aop.TraceAfterHandler?.Invoke(this, new Aop.TraceAfterEventArgs(_tranBefore, "回滚", null));
}
}
catch (Exception ex)
{
if (isRollbacked == false)
_fsql?.Aop.TraceAfterHandler?.Invoke(this, new Aop.TraceAfterEventArgs(_tranBefore, "回滚失败", ex));
#pragma warning disable CA2200 // 再次引发以保留堆栈详细信息
throw ex;
#pragma warning restore CA2200 // 再次引发以保留堆栈详细信息
}
finally
{
ReturnObject();
_tranBefore = null;
}
}
public DbContext.EntityChangeReport EntityChangeReport { get; } = new DbContext.EntityChangeReport();
public Dictionary<string, object> States { get; } = new Dictionary<string, object>();
~UnitOfWork() => this.Dispose();
int _disposeCounter;
public void Dispose()
{
if (Interlocked.Increment(ref _disposeCounter) != 1) return;
try
{
this.Rollback();
}
finally
{
_fsql?.Aop.TraceAfterHandler?.Invoke(this, new Aop.TraceAfterEventArgs(_uowBefore, "释放", null));
GC.SuppressFinalize(this);
}
}
}
}

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FreeSql.DbContext/UnitOfWork/UnitOfWorkManager.cs Normal file
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using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Linq;
using System.Threading;
namespace FreeSql
{
/// <summary>
/// 工作单元管理器
/// </summary>
public class UnitOfWorkManager : IDisposable
{
internal DbContextScopedFreeSql _ormScoped;
internal IFreeSql OrmOriginal => _ormScoped?._originalFsql;
public IFreeSql Orm => _ormScoped;
List<UowInfo> _rawUows = new List<UowInfo>();
List<UowInfo> _allUows = new List<UowInfo>();
List<RepoInfo> _repos = new List<RepoInfo>();
public UnitOfWorkManager(IFreeSql fsql)
{
if (fsql == null) throw new ArgumentNullException(DbContextStrings.UnitOfWorkManager_Construction_CannotBeNull(nameof(UnitOfWorkManager), nameof(fsql)));
_ormScoped = DbContextScopedFreeSql.Create(fsql, null, () => this.Current);
}
#region Dispose
~UnitOfWorkManager() => this.Dispose();
int _disposeCounter;
public void Dispose()
{
if (Interlocked.Increment(ref _disposeCounter) != 1) return;
try
{
Exception exception = null;
for (var a = _rawUows.Count - 1; a >= 0; a--)
{
try
{
if (exception == null) _rawUows[a].Uow.Commit();
else _rawUows[a].Uow.Rollback();
}
catch (Exception ex)
{
if (exception == null) exception = ex;
}
}
if (exception != null) throw exception;
}
finally
{
_rawUows.Clear();
_allUows.Clear();
_repos.Clear();
GC.SuppressFinalize(this);
}
}
#endregion
/// <summary>
/// 当前的工作单元
/// </summary>
public IUnitOfWork Current => _allUows.LastOrDefault()?.Uow;
/// <summary>
/// 将仓储的事务交给我管理
/// </summary>
/// <param name="repository"></param>
public void Binding(IBaseRepository repository)
{
var repoInfo = new RepoInfo(repository);
repository.UnitOfWork = Current;
if (_repos.Any(a => a.Repository == repository)) return;
_repos.Add(repoInfo);
}
void SetAllRepositoryUow()
{
foreach (var repo in _repos)
repo.Repository.UnitOfWork = Current ?? repo.OrginalUow;
}
/// <summary>
/// 创建工作单元
/// </summary>
/// <param name="propagation">事务传播方式</param>
/// <param name="isolationLevel">事务隔离级别</param>
/// <returns></returns>
public IUnitOfWork Begin(Propagation propagation = Propagation.Required, IsolationLevel? isolationLevel = null)
{
switch (propagation)
{
case Propagation.Required: return FindedUowCreateVirtual() ?? CreateUow(isolationLevel);
case Propagation.Supports: return FindedUowCreateVirtual() ?? CreateUowNothing(_allUows.LastOrDefault()?.IsNotSupported ?? false);
case Propagation.Mandatory: return FindedUowCreateVirtual() ?? throw new Exception(DbContextStrings.Propagation_Mandatory);
case Propagation.NotSupported: return CreateUowNothing(true);
case Propagation.Never:
var isNotSupported = _allUows.LastOrDefault()?.IsNotSupported ?? false;
if (isNotSupported == false)
{
for (var a = _rawUows.Count - 1; a >= 0; a--)
if (_rawUows[a].Uow.GetOrBeginTransaction(false) != null)
throw new Exception(DbContextStrings.Propagation_Never);
}
return CreateUowNothing(isNotSupported);
case Propagation.Nested: return CreateUow(isolationLevel);
default: throw new NotImplementedException();
}
}
IUnitOfWork FindedUowCreateVirtual()
{
var isNotSupported = _allUows.LastOrDefault()?.IsNotSupported ?? false;
if (isNotSupported == false)
{
for (var a = _rawUows.Count - 1; a >= 0; a--)
if (_rawUows[a].Uow.GetOrBeginTransaction(false) != null)
{
var uow = new UnitOfWorkVirtual(_rawUows[a].Uow);
var uowInfo = new UowInfo(uow, UowInfo.UowType.Virtual, isNotSupported);
uow.OnDispose = () => _allUows.Remove(uowInfo);
_allUows.Add(uowInfo);
SetAllRepositoryUow();
return uow;
}
}
return null;
}
IUnitOfWork CreateUowNothing(bool isNotSupported)
{
var uow = new UnitOfWorkNothing(Orm);
var uowInfo = new UowInfo(uow, UowInfo.UowType.Nothing, isNotSupported);
uow.OnDispose = () => _allUows.Remove(uowInfo);
_allUows.Add(uowInfo);
SetAllRepositoryUow();
return uow;
}
IUnitOfWork CreateUow(IsolationLevel? isolationLevel)
{
var uow = new UnitOfWorkOrginal(new UnitOfWork(OrmOriginal));
var uowInfo = new UowInfo(uow, UowInfo.UowType.Orginal, false);
if (isolationLevel != null) uow.IsolationLevel = isolationLevel.Value;
try { uow.GetOrBeginTransaction(); }
catch { uow.Dispose(); throw; }
uow.OnDispose = () =>
{
_rawUows.Remove(uowInfo);
_allUows.Remove(uowInfo);
SetAllRepositoryUow();
};
_rawUows.Add(uowInfo);
_allUows.Add(uowInfo);
SetAllRepositoryUow();
return uow;
}
class RepoInfo
{
public IBaseRepository Repository;
public IUnitOfWork OrginalUow;
public RepoInfo(IBaseRepository repository)
{
this.Repository = repository;
this.OrginalUow = repository.UnitOfWork;
}
}
class UowInfo
{
public IUnitOfWork Uow;
public UowType Type;
public bool IsNotSupported;
public enum UowType { Orginal, Virtual, Nothing }
public UowInfo(IUnitOfWork uow, UowType type, bool isNotSupported)
{
this.Uow = uow;
this.Type = type;
this.IsNotSupported = isNotSupported;
}
}
class UnitOfWorkOrginal : IUnitOfWork
{
IUnitOfWork _baseUow;
internal Action OnDispose;
public UnitOfWorkOrginal(IUnitOfWork baseUow) => _baseUow = baseUow;
public IFreeSql Orm => _baseUow.Orm;
public IsolationLevel? IsolationLevel { get => _baseUow.IsolationLevel; set => _baseUow.IsolationLevel = value; }
public DbContext.EntityChangeReport EntityChangeReport => _baseUow.EntityChangeReport;
public Dictionary<string, object> States => _baseUow.States;
public DbTransaction GetOrBeginTransaction(bool isCreate = true) => _baseUow.GetOrBeginTransaction(isCreate);
public void Commit() => _baseUow.Commit();
public void Rollback() => _baseUow.Rollback();
public void Dispose()
{
_baseUow.Dispose();
OnDispose?.Invoke();
}
}
class UnitOfWorkVirtual : IUnitOfWork
{
IUnitOfWork _baseUow;
internal Action OnDispose;
public UnitOfWorkVirtual(IUnitOfWork baseUow) => _baseUow = baseUow;
public IFreeSql Orm => _baseUow.Orm;
public IsolationLevel? IsolationLevel { get => _baseUow.IsolationLevel; set { } }
public DbContext.EntityChangeReport EntityChangeReport => _baseUow.EntityChangeReport;
public Dictionary<string, object> States => _baseUow.States;
public DbTransaction GetOrBeginTransaction(bool isCreate = true) => _baseUow.GetOrBeginTransaction(isCreate);
public void Commit() { }
public void Rollback() => _baseUow.Rollback();
public void Dispose() => OnDispose?.Invoke();
}
class UnitOfWorkNothing : IUnitOfWork
{
internal IFreeSql _fsql;
internal Action OnDispose;
public UnitOfWorkNothing(IFreeSql fsql) => _fsql = fsql;
public IFreeSql Orm => _fsql;
public IsolationLevel? IsolationLevel { get; set; }
public DbContext.EntityChangeReport EntityChangeReport { get; } = new DbContext.EntityChangeReport();
public Dictionary<string, object> States { get; } = new Dictionary<string, object>();
public DbTransaction GetOrBeginTransaction(bool isCreate = true) => null;
public void Commit()
{
if (EntityChangeReport != null && EntityChangeReport.OnChange != null && EntityChangeReport.Report.Any() == true)
EntityChangeReport.OnChange.Invoke(EntityChangeReport.Report);
EntityChangeReport?.Report.Clear();
}
public void Rollback() => EntityChangeReport?.Report.Clear();
public void Dispose() => OnDispose?.Invoke();
}
}
/// <summary>
/// 事务传播方式
/// </summary>
public enum Propagation
{
/// <summary>
/// 如果当前没有事务，就新建一个事务，如果已存在一个事务中，加入到这个事务中，默认的选择。
/// </summary>
Required,
/// <summary>
/// 支持当前事务，如果没有当前事务，就以非事务方法执行。
/// </summary>
Supports,
/// <summary>
/// 使用当前事务，如果没有当前事务，就抛出异常。
/// </summary>
Mandatory,
/// <summary>
/// 以非事务方式执行操作，如果当前存在事务，就把当前事务挂起。
/// </summary>
NotSupported,
/// <summary>
/// 以非事务方式执行操作，如果当前事务存在则抛出异常。
/// </summary>
Never,
/// <summary>
/// 以嵌套事务方式执行。
/// </summary>
Nested
}
}