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完善节点图的代码生成
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fengjiayi
397
NodeFlow/Services/FlowLibraryService.cs
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397
NodeFlow/Services/FlowLibraryService.cs
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using Serein.Library;
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using Serein.Library.Api;
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using Serein.Library.FlowNode;
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using Serein.Library.Utils;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Reflection;
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using System.Runtime.Loader;
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using System.Text;
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using System.Threading.Tasks;
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using System.Xml.Linq;
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namespace Serein.NodeFlow.Services
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{
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/// <summary>
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/// 管理加载在运行环境中的外部程序集
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/// </summary>
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public class FlowLibraryService
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{
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public FlowLibraryService(IFlowEnvironment flowEnvironment)
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{
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this.flowEnvironment = flowEnvironment;
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}
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private readonly IFlowEnvironment flowEnvironment;
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/// <summary>
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/// 缓存所有加载了的程序集
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/// </summary>
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private readonly ConcurrentDictionary<string, FlowLibrary> _myFlowLibrarys = new ConcurrentDictionary<string, FlowLibrary>();
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/// <summary>
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/// 加载类库
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/// </summary>
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/// <param name="libraryfilePath"></param>
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/// <returns></returns>
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public (NodeLibraryInfo, List<MethodDetailsInfo>) LoadLibraryOfPath(string libraryfilePath)
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{
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var dir = Path.GetDirectoryName(libraryfilePath); // 获取目录路径
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var sereinFlowBaseLibraryPath = Path.Combine(dir, SereinBaseLibrary);// 每个类库下面至少需要有“Serein.Library.dll”类库依赖
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if (!Path.Exists(sereinFlowBaseLibraryPath))
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{
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throw new Exception($"从文件加载DLL失败，目标文件夹不存在{SereinBaseLibrary}文件" );
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}
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var flowAlc = new FlowLibraryAssemblyContext(sereinFlowBaseLibraryPath, Path.GetFileName(libraryfilePath));
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var assembly = flowAlc.LoadFromAssemblyPath(libraryfilePath); // 加载指定路径的程序集
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var flowLibrary = new FlowLibrary(assembly);
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try
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{
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var reulst = LoadFlowLibrary(flowLibrary);
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return reulst;
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}
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catch (Exception)
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{
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flowAlc?.Unload(); // 卸载程序集
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flowAlc = null;
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GC.Collect(); // 强制触发GC确保卸载成功
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GC.WaitForPendingFinalizers();
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throw;
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}
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}
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/// <summary>
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/// 加载类库
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/// </summary>
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/// <param name="flowLibrary"></param>
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/// <returns></returns>
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public (NodeLibraryInfo, List<MethodDetailsInfo>) LoadLibraryOfPath(FlowLibrary flowLibrary)
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{
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return LoadFlowLibrary(flowLibrary);
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}
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/// <summary>
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/// 卸载类库
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/// </summary>
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/// <param name="assemblyName"></param>
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/// <returns></returns>
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public bool UnloadLibrary(string assemblyName)
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{
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if (_myFlowLibrarys.Remove(assemblyName, out var flowLibrary))
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{
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try
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{
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flowLibrary.Upload(); // 尝试卸载
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flowLibrary = null;
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return true;
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}
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catch (Exception ex)
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{
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SereinEnv.WriteLine(InfoType.ERROR, $"尝试卸载程序集[{assemblyName}]发生错误：{ex}");
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return false;
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}
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 获取方法描述
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/// </summary>
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/// <param name="assemblyName">程序集名称</param>
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/// <param name="methodName">方法名称</param>
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/// <param name="md">返回的方法描述</param>
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/// <returns>是否获取成功</returns>
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public bool TryGetMethodInfo(string assemblyName, string methodName, [MaybeNullWhen(false)] out MethodInfo methodInfo)
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{
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if (string.IsNullOrEmpty(assemblyName) || string.IsNullOrEmpty(methodName))
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{
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methodInfo = null;
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return false;
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}
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if (_myFlowLibrarys.TryGetValue(assemblyName, out var flowLibrary)
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&& flowLibrary.MethodInfos.TryGetValue(methodName, out methodInfo))
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{
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return true;
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}
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else
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{
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methodInfo = null;
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return false;
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}
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}
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/// <summary>
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/// 获取方法描述
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/// </summary>
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/// <param name="assemblyName">程序集名称</param>
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/// <param name="methodName">方法名称</param>
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/// <param name="md">返回的方法描述</param>
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/// <returns>是否获取成功</returns>
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public bool TryGetMethodDetails(string assemblyName, string methodName, [MaybeNullWhen(false)] out MethodDetails md)
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{
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if (_myFlowLibrarys.TryGetValue(assemblyName, out var flowLibrary)
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&& flowLibrary.MethodDetailss.TryGetValue(methodName, out md))
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{
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return true;
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}
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else
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{
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md = null;
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return false;
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}
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}
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/// <summary>
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/// 获取方法调用的委托
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/// </summary>
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/// <param name="assemblyName">程序集名称</param>
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/// <param name="methodName">方法名称</param>
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/// <param name="dd">返回的委托调用封装类</param>
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/// <returns>是否获取成功</returns>
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public bool TryGetDelegateDetails(string assemblyName, string methodName, [MaybeNullWhen(false)] out DelegateDetails dd)
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{
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if (_myFlowLibrarys.TryGetValue(assemblyName, out var flowLibrary)
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&& flowLibrary.DelegateDetailss.TryGetValue(methodName, out dd))
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{
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return true;
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}
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else
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{
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dd = null;
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return false;
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}
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}
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/// <summary>
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/// 获取(初始化/加载时/退出后)相应的节点方法
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/// </summary>
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/// <param name="nodeType"></param>
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/// <returns></returns>
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public List<MethodDetails> GetMdsOnFlowStart(NodeType nodeType)
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{
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List<MethodDetails> mds = [];
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foreach (var library in _myFlowLibrarys.Values)
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{
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var t_mds = library.MethodDetailss.Values.Where(it => it.MethodDynamicType == nodeType).ToList();
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mds.AddRange(t_mds);
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}
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return mds;
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}
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/// <summary>
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/// 获取流程启动时在不同时间点需要自动实例化的类型
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/// </summary>
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/// <returns></returns>
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public Dictionary<RegisterSequence, List<Type>> GetaAutoRegisterType()
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{
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Dictionary<RegisterSequence, List<Type>> rsTypes = new Dictionary<RegisterSequence, List<Type>>();
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foreach (var library in _myFlowLibrarys.Values)
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{
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foreach (var kv in library.RegisterTypes)
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{
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var @class = kv.Key;
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var type = kv.Value;
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if (!rsTypes.TryGetValue(@class, out var tmpTypes))
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{
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tmpTypes = new List<Type>();
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rsTypes.Add(@class, tmpTypes);
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}
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tmpTypes.AddRange(type);
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}
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}
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return rsTypes;
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}
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/// <summary>
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/// 获取某个程序集下的所有方法信息，用于保存项目时调用
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/// </summary>
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/// <returns></returns>
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public List<MethodDetails> GetLibraryMdsOfAssmbly(string assemblyName)
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{
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if (_myFlowLibrarys.TryGetValue(assemblyName, out var flowLibrary))
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{
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return flowLibrary.MethodDetailss.Values.ToList();
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}
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return [];
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}
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/// <summary>
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/// 获取所有方法信息，用于保存项目时调用
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/// </summary>
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/// <returns></returns>
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public List<LibraryMds> GetAllLibraryMds()
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{
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List<LibraryMds> mds = new List<LibraryMds>();
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foreach (FlowLibrary library in _myFlowLibrarys.Values)
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{
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var tmp = new LibraryMds
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{
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AssemblyName = library.FullName,
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Mds = library.MethodDetailss.Values.Select(md => md.ToInfo()).ToArray()
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};
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mds.Add(tmp);
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}
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return mds;
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}
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/// <summary>
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/// 序列化当前项目的依赖信息、节点信息，用于远程登录的场景，需要将依赖信息从本地（受控端）发送到远程（主控端）
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/// </summary>
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/// <returns></returns>
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public List<NodeLibraryInfo> GetAllLibraryInfo()
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{
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return _myFlowLibrarys.Values.Select(library => library.ToInfo()).ToList();
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}
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#region 功能性方法
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/// <summary>
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/// 基础依赖
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/// </summary>
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public readonly static string SereinBaseLibrary = $"{nameof(Serein)}.{nameof(Library)}.dll";
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//private (NodeLibraryInfo, List<MethodDetailsInfo>) LoadDllNodeInfo(Assembly assembly)
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//{
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// if (assembly.FullName?.ToString().Equals(typeof(IFlowEnvironment).Assembly.FullName?.ToString()) == true)
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// {
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// // 加载基础依赖
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// return LoadAssembly(typeof(IFlowEnvironment).Assembly);
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// }
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// else
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// {
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// try
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// {
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// var assembly_result = LoadAssembly(assembly);
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// return assembly_result;
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// }
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// catch (Exception)
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// {
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// return (null,[]);
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// }
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// }
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//}
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private (NodeLibraryInfo, List<MethodDetailsInfo>) LoadFlowLibrary(FlowLibrary flowLibrary)
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{
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var assembly = flowLibrary.Assembly;
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if (assembly.FullName?.ToString().Equals(typeof(IFlowEnvironment).Assembly.FullName?.ToString()) == true)
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{
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// 加载基础依赖
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flowLibrary = new FlowLibrary(typeof(IFlowEnvironment).Assembly);
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}
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var assmblyName = assembly.GetName().Name;
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if (!string.IsNullOrEmpty(assmblyName) && _myFlowLibrarys.ContainsKey(assmblyName))
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{
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throw new Exception($"程序集[{assembly.GetName().FullName}]已经加载过!");
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}
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var loadResult = flowLibrary.LoadAssembly(); // 加载程序集
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if (loadResult)
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{
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var assemblyName = assembly.GetName().Name;
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if (string.IsNullOrEmpty(assemblyName))
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{
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throw new Exception($"程序集[{assembly.GetName().FullName}]加载失败，没有程序集名称");
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}
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_myFlowLibrarys.TryAdd(assemblyName, flowLibrary);
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List<MethodDetailsInfo> mdInfos = flowLibrary.MethodDetailss.Values.Select(md => md.ToInfo()).ToList();
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mdInfos.Sort((a, b) => string.Compare(a.MethodName, b.MethodName, StringComparison.OrdinalIgnoreCase));
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(NodeLibraryInfo, List<MethodDetailsInfo>) result = (flowLibrary.ToInfo(), mdInfos);
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return result;
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}
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else
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{
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throw new Exception($"程序集[{assembly.GetName().FullName}]加载失败");
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}
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}
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#endregion
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}
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/// <summary>
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/// 流程依赖加载
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/// </summary>
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public class FlowLibraryAssemblyContext : AssemblyLoadContext
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{
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private readonly AssemblyDependencyResolver _resolver;
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/// <summary>
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/// 创建新的加载上下文
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/// </summary>
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/// <param name="sereinFlowLibraryPath">类库路径</param>
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/// <param name="name"></param>
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public FlowLibraryAssemblyContext(string sereinFlowLibraryPath, string name) : base(name, isCollectible: true)
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{
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_resolver = new AssemblyDependencyResolver(sereinFlowLibraryPath);
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}
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protected override Assembly? Load(AssemblyName assemblyName)
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{
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string? assemblyPath = _resolver.ResolveAssemblyToPath(assemblyName);
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if (!string.IsNullOrEmpty(assemblyPath))
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{
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var assembly = Default.LoadFromAssemblyPath(assemblyPath);
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//var assembly = LoadFromAssemblyPath(assemblyPath);
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return assembly;
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}
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else
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{
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return Default.Assemblies.FirstOrDefault(x => x.FullName == assemblyName.FullName);
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}
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// return null;
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// 构建依赖项的路径
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//string assemblyPath = Path.Combine(AppContext.BaseDirectory, assemblyName.Name + ".dll");
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//if (File.Exists(assemblyPath))
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//{
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// return LoadFromAssemblyPath(assemblyPath);
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//}
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//assemblyPath = Path.Combine(filePath, assemblyName.Name + ".dll");
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//if (File.Exists(assemblyPath))
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//{
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// return LoadFromAssemblyPath(assemblyPath);
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//}
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//return null; // 如果没有找到，返回 null
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}
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}
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//public static class PluginAssemblyContextExtensions
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//{
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// public static Assembly FromAssemblyPath(this AssemblyLoadContext context, string path)
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// {
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// return context.LoadFromAssemblyPath(path);
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// }
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//}
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}
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