原创2022-10-15 17:01·码农阿峰
前言
孔乙己显出极高兴的样子，将两个指头的长指甲敲着柜台，点头说：“对呀，对呀！......回字有四样写法，你知道么？”
大家好，我是44岁的大龄程序员码农阿峰。阿峰从事编程二十年了，虽然没有成为架构师，却也用过很多种架构。我觉得一招鲜走遍天，架构师常用的那几招我还是会的，听我来说道说道。我以为至少有这几招：
- 模板方法设计模式
- 反射
- 不重复造轮子，集众家所长
架构经验总结
1).模板方法设计模式的运用
在一个方法中定义了一个算法的骨架或者步骤，而将一些步骤延迟到子类中去实现。模板方法使得子类可以在不改变算法结构的情况下，重新定义算法中的某一些步骤。
#父类： namespace Repository { /// <summary> /// 数据库存储泛型基类 /// </summary> /// <typeparam name="T"></typeparam> public class BaseRepository<T> : SimpleClient<T> where T : class, new() { public ITenant itenant = null;//多租户事务 public BaseRepository(ISqlSugarClient context = null) : base(context) { //通过特性拿到ConfigId var configId = typeof(T).GetCustomAttribute<TenantAttribute>()?.configId; if (configId != null) { Context = DbScoped.SugarScope.GetConnectionScope(configId);//根据类传入的ConfigId自动选择 } else { Context = context ?? DbScoped.SugarScope.GetConnectionScope(0);//没有默认db0 } itenant = DbScoped.SugarScope;//设置租户接口 } #region add /// <summary> /// 插入实体 /// </summary> /// <param name="t"></param> /// <returns></returns> public int Add(T t) { return Context.Insertable(t).IgnoreColumns(true).ExecuteCommand(); } public int Insert(List<T> t) { return Context.Insertable(t).ExecuteCommand(); } public int Insert(T parm, Expression<Func<T, object>> iClumns = null, bool ignoreNull = true) { return Context.Insertable(parm).InsertColumns(iClumns).IgnoreColumns(ignoreNullColumn: ignoreNull).ExecuteCommand(); } public IInsertable<T> Insertable(T t) { return Context.Insertable<T>(t); } #endregion add #region update public IUpdateable<T> Updateable(T entity) { return Context.Updateable(entity); } public int Update(T entity, bool ignoreNullColumns = false) { return Context.Updateable(entity).IgnoreColumns(ignoreNullColumns).ExecuteCommand(); } public int Update(T entity, Expression<Func<T, object>> expression, bool ignoreAllNull = false) { return Context.Updateable(entity).UpdateColumns(expression).IgnoreColumns(ignoreAllNull).ExecuteCommand(); } /// <summary> /// 根据实体类更新指定列 eg：Update(dept, it => new { it.Status }, f => depts.Contains(f.DeptId));只更新Status列，条件是包含 /// </summary> /// <param name="entity"></param> /// <param name="expression"></param> /// <param name="where"></param> /// <returns></returns> public int Update(T entity, Expression<Func<T, object>> expression, Expression<Func<T, bool>> where) { return Context.Updateable(entity).UpdateColumns(expression).Where(where).ExecuteCommand(); } public int Update(SqlSugarClient client, T entity, Expression<Func<T, object>> expression, Expression<Func<T, bool>> where) { return client.Updateable(entity).UpdateColumns(expression).Where(where).ExecuteCommand(); } /// <summary> /// /// </summary> /// <param name="entity"></param> /// <param name="list"></param> /// <param name="isNull">默认为true</param> /// <returns></returns> public int Update(T entity, List<string> list = null, bool isNull = true) { if (list == null) { list = new List<string>() { "Create_By", "Create_time" }; } return Context.Updateable(entity).IgnoreColumns(isNull).IgnoreColumns(list.ToArray()).ExecuteCommand(); } /// <summary> /// 更新指定列 eg：Update(w => w.NoticeId == model.NoticeId, it => new SysNotice(){ Update_time = DateTime.Now, Title = "通知标题" }); /// </summary> /// <param name="where"></param> /// <param name="columns"></param> /// <returns></returns> public int Update(Expression<Func<T, bool>> where, Expression<Func<T, T>> columns) { return Context.Updateable<T>().SetColumns(columns).Where(where).RemoveDataCache().ExecuteCommand(); } #endregion update public DbResult<bool> UseTran(Action action) { try { var result = Context.Ado.UseTran(() => action()); return result; } catch (Exception ex) { Context.Ado.RollbackTran(); Console.WriteLine(ex.Message); throw; } } public IStorageable<T> Storageable(T t) { return Context.Storageable<T>(t); } public IStorageable<T> Storageable(List<T> t) { return Context.Storageable(t); } /// <summary> /// /// </summary> /// <param name="client"></param> /// <param name="action">增删改查方法</param> /// <returns></returns> public DbResult<bool> UseTran(SqlSugarClient client, Action action) { try { var result = client.AsTenant().UseTran(() => action()); return result; } catch (Exception ex) { client.AsTenant().RollbackTran(); Console.WriteLine(ex.Message); throw; } } public bool UseTran2(Action action) { var result = Context.Ado.UseTran(() => action()); return result.IsSuccess; } #region delete public IDeleteable<T> Deleteable() { return Context.Deleteable<T>(); } /// <summary> /// 批量删除 /// </summary> /// <param name="obj"></param> /// <returns></returns> public int Delete(object[] obj) { return Context.Deleteable<T>().In(obj).ExecuteCommand(); } public int Delete(object id) { return Context.Deleteable<T>(id).ExecuteCommand(); } public int DeleteTable() { return Context.Deleteable<T>().ExecuteCommand(); } public bool Truncate() { return Context.DbMaintenance.TruncateTable<T>(); } #endregion delete #region query public bool Any(Expression<Func<T, bool>> expression) { return Context.Queryable<T>().Where(expression).Any(); } public ISugarQueryable<T> Queryable() { return Context.Queryable<T>(); } public (List<T>, int) QueryableToPage(Expression<Func<T, bool>> expression, int pageIndex = 0, int pageSize = 10) { int totalNumber = 0; var list = Context.Queryable<T>().Where(expression).ToPageList(pageIndex, pageSize, ref totalNumber); return (list, totalNumber); } public (List<T>, int) QueryableToPage(Expression<Func<T, bool>> expression, string order, int pageIndex = 0, int pageSize = 10) { int totalNumber = 0; var list = Context.Queryable<T>().Where(expression).OrderBy(order).ToPageList(pageIndex, pageSize, ref totalNumber); return (list, totalNumber); } public (List<T>, int) QueryableToPage(Expression<Func<T, bool>> expression, Expression<Func<T, object>> orderFiled, string orderBy, int pageIndex = 0, int pageSize = 10) { int totalNumber = 0; if (orderBy.Equals("DESC", StringComparison.OrdinalIgnoreCase)) { var list = Context.Queryable<T>().Where(expression).OrderBy(orderFiled, OrderByType.Desc).ToPageList(pageIndex, pageSize, ref totalNumber); return (list, totalNumber); } else { var list = Context.Queryable<T>().Where(expression).OrderBy(orderFiled, OrderByType.Asc).ToPageList(pageIndex, pageSize, ref totalNumber); return (list, totalNumber); } } public List<T> SqlQueryToList(string sql, object obj = null) { return Context.Ado.SqlQuery<T>(sql, obj); } /// <summary> /// 根据主值查询单条数据 /// </summary> /// <param name="pkValue">主键值</param> /// <returns>泛型实体</returns> public T GetId(object pkValue) { return Context.Queryable<T>().InSingle(pkValue); } /// <summary> /// 根据条件查询分页数据 /// </summary> /// <param name="where"></param> /// <param name="parm"></param> /// <returns></returns> public PagedInfo<T> GetPages(Expression<Func<T, bool>> where, PagerInfo parm) { var source = Context.Queryable<T>().Where(where); return source.ToPage(parm); } public PagedInfo<T> GetPages(Expression<Func<T, bool>> where, PagerInfo parm, Expression<Func<T, object>> order, OrderByType orderEnum = OrderByType.Asc) { var source = Context.Queryable<T>().Where(where).OrderByIF(orderEnum == OrderByType.Asc, order, OrderByType.Asc).OrderByIF(orderEnum == OrderByType.Desc, order, OrderByType.Desc); return source.ToPage(parm); } public PagedInfo<T> GetPages(Expression<Func<T, bool>> where, PagerInfo parm, Expression<Func<T, object>> order, string orderByType) { return GetPages(where, parm, order, orderByType == "desc" ? OrderByType.Desc : OrderByType.Asc); } /// <summary> /// 查询所有数据(无分页,请慎用) /// </summary> /// <returns></returns> public List<T> GetAll(bool useCache = false, int cacheSecond = 3600) { return Context.Queryable<T>().WithCacheIF(useCache, cacheSecond).ToList(); } #endregion query /// <summary> /// 此方法不带output返回值 /// var list = new List<SugarParameter>(); /// list.Add(new SugarParameter(ParaName, ParaValue)); input /// </summary> /// <param name="procedureName"></param> /// <param name="parameters"></param> /// <returns></returns> public DataTable UseStoredProcedureToDataTable(string procedureName, List<SugarParameter> parameters) { return Context.Ado.UseStoredProcedure().GetDataTable(procedureName, parameters); } /// <summary> /// 带output返回值 /// var list = new List<SugarParameter>(); /// list.Add(new SugarParameter(ParaName, ParaValue, true)); output /// list.Add(new SugarParameter(ParaName, ParaValue)); input /// </summary> /// <param name="procedureName"></param> /// <param name="parameters"></param> /// <returns></returns> public (DataTable, List<SugarParameter>) UseStoredProcedureToTuple(string procedureName, List<SugarParameter> parameters) { var result = (Context.Ado.UseStoredProcedure().GetDataTable(procedureName, parameters), parameters); return result; } } /// <summary> /// 分页查询扩展 /// </summary> public static class QueryableExtension { /// <summary> /// 读取列表 /// </summary> /// <typeparam name="T"></typeparam>