后台代码版本控制

怼烎@ 2022-01-07 16:43 243阅读 0赞

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

namespace Manjinba.Communication.Common.Attributes  
\{  
/// <summary>  
///  
/// </summary>  
\[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)\]  
public class IMVersionAttribute : Attribute  
\{  
/// <summary>  
///  
/// </summary>  
public string Name \{ get; set; \}  
/// <summary>  
///  
/// </summary>  
/// <param name="name"></param>  
public IMVersionAttribute(string name)  
\{  
Name = name;  
\}  
\}  
\}

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Reflection;  
using Manjinba.Communication.Common.Attributes;

namespace Manjinba.Communication.Common.Utils  
\{  
/// <summary>  
///  
/// </summary>  
public class VersionManager  
\{  
/// <summary>  
///  
/// </summary>  
/// <typeparam name="T"></typeparam>  
/// <param name="assembly"></param>  
/// <param name="version"></param>  
/// <returns></returns>  
public static T GetInstance<T>(Assembly assembly, string version) where T : class  
\{  
T result = default(T);  
Type type = typeof(T);  
var types = assembly.GetTypes().Where(a => type.IsAssignableFrom(a));  
List<string> versions = new List<string>();

foreach (var c in types)  
\{  
IMVersionAttribute attr = (IMVersionAttribute)c.GetCustomAttribute(typeof(IMVersionAttribute));  
if (attr == null)  
\{  
if (string.IsNullOrEmpty(version))  
\{  
return (Activator.CreateInstance(c) as T);  
\}  
\}  
else  
\{  
if (version == attr.Name)  
\{  
return (Activator.CreateInstance(c) as T);  
\}  
versions.Add(attr.Name);  
\}  
\}

if (versions.Count > 0)  
\{  
versions.Sort();  
string maxVersion = versions\[versions.Count - 1\];  
foreach (var c in types)  
\{  
IMVersionAttribute attr = (IMVersionAttribute)c.GetCustomAttribute(typeof(IMVersionAttribute));  
if (attr != null && attr.Name == maxVersion)  
\{  
return (Activator.CreateInstance(c) as T);  
\}

\}  
\}  
return result;  
\}  
\}  
\}

调用：

IUserRepository userRepository = VersionManager.GetInstance<IUserRepository>(assembly, request.version);

转载于:https://www.cnblogs.com/Nine4Cool/p/10540870.html