添加项目文件。
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254
WaterCloud.Code/Globals/GlobalContext.cs
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254
WaterCloud.Code/Globals/GlobalContext.cs
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.StaticFiles;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.DependencyModel;
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using Microsoft.Extensions.Hosting;
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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;
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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 WaterCloud.Code.Model;
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namespace WaterCloud.Code
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{
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public static class GlobalContext
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{
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/// <summary>
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/// 构造函数
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/// </summary>
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static GlobalContext()
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{
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// 未托管的对象
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UnmanagedObjects = new ConcurrentBag<IDisposable>();
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Assemblies = GetAssemblies();
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EffectiveTypes = Assemblies.SelectMany(GetTypes);
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}
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/// <summary>
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/// 服务集合
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/// </summary>
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public static IServiceCollection Services { get; set; }
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/// <summary>
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/// 根服务
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/// </summary>
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public static IServiceProvider RootServices { get; set; }
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public static IConfiguration Configuration { get; set; }
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public static IWebHostEnvironment HostingEnvironment { get; set; }
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/// <summary>
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/// 未托管的对象集合
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/// </summary>
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public static readonly ConcurrentBag<IDisposable> UnmanagedObjects;
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public static HttpContext HttpContext => RootServices?.GetService<IHttpContextAccessor>()?.HttpContext;
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public static SystemConfig SystemConfig { get; set; }
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/// <summary>
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/// 应用有效程序集(类型为project,项目应用的,不包括包和手动应用)
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/// </summary>
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public static readonly IEnumerable<Assembly> Assemblies;
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/// <summary>
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/// 有效程序集类型
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/// </summary>
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public static readonly IEnumerable<System.Type> EffectiveTypes;
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/// <summary>
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/// 获取请求生存周期的服务(未注册返回null)
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/// </summary>
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/// <typeparam name="TService"></typeparam>
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/// <param name="serviceProvider"></param>
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/// <returns></returns>
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public static TService GetService<TService>(IServiceProvider serviceProvider = null) where TService : class
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{
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return GetService(typeof(TService), serviceProvider) as TService;
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}
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/// <summary>
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/// 获取请求生存周期的服务(未注册返回null)
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/// </summary>
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/// <param name="type"></param>
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/// <param name="serviceProvider"></param>
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/// <returns></returns>
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public static object GetService(Type type, IServiceProvider serviceProvider = null)
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{
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return (serviceProvider ?? GetServiceProvider(type)).GetService(type);
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}
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/// <summary>
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/// 获取请求生存周期的服务(未注册异常)
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/// </summary>
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/// <typeparam name="TService"></typeparam>
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/// <param name="serviceProvider"></param>
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/// <returns></returns>
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public static TService GetRequiredService<TService>(IServiceProvider serviceProvider = null) where TService : class
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{
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return GetRequiredService(typeof(TService), serviceProvider) as TService;
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}
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/// <summary>
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/// 获取请求生存周期的服务(未注册异常)
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/// </summary>
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/// <typeparam name="type"></typeparam>
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/// <param name="serviceProvider"></param>
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/// <returns></returns>
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public static object GetRequiredService(Type type, IServiceProvider serviceProvider = null)
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{
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return (serviceProvider ?? GetServiceProvider(type)).GetRequiredService(type);
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}
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/// <summary>
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/// 获取服务注册器
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/// </summary>
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/// <param name="serviceType"></param>
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/// <returns></returns>
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public static IServiceProvider GetServiceProvider(Type serviceType)
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{
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if (HostingEnvironment == null)
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{
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return RootServices;
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}
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if (RootServices != null && Services.Where((ServiceDescriptor u) => u.ServiceType == (serviceType.IsGenericType ? serviceType.GetGenericTypeDefinition() : serviceType)).Any((ServiceDescriptor u) => u.Lifetime == ServiceLifetime.Singleton))
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{
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return RootServices;
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}
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// 第二选择是获取 HttpContext 对象的 RequestServices
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var httpContext = HttpContext;
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if (httpContext?.RequestServices != null) return httpContext.RequestServices;
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// 第三选择，创建新的作用域并返回服务提供器
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else if (RootServices != null)
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{
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var scoped = RootServices.CreateScope();
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UnmanagedObjects.Add(scoped);
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return scoped.ServiceProvider;
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}
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// 第四选择，构建新的服务对象（性能最差）
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else
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{
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var serviceProvider = Services.BuildServiceProvider();
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UnmanagedObjects.Add(serviceProvider);
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return serviceProvider;
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}
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}
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/// <summary>
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/// GC 回收默认间隔
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/// </summary>
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private const int GC_COLLECT_INTERVAL_SECONDS = 5;
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/// <summary>
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/// 记录最近 GC 回收时间
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/// </summary>
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private static DateTime? LastGCCollectTime { get; set; }
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/// <summary>
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/// 释放所有未托管的对象
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/// </summary>
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public static void DisposeUnmanagedObjects()
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{
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foreach (var dsp in UnmanagedObjects)
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{
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try
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{
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dsp?.Dispose();
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}
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finally { }
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}
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// 强制手动回收 GC 内存
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if (UnmanagedObjects.Any())
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{
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var nowTime = DateTime.UtcNow;
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if ((LastGCCollectTime == null || (nowTime - LastGCCollectTime.Value).TotalSeconds > GC_COLLECT_INTERVAL_SECONDS))
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{
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LastGCCollectTime = nowTime;
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GC.Collect();
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GC.WaitForPendingFinalizers();
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}
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}
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UnmanagedObjects.Clear();
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}
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/// <summary>
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/// 获取版本号
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/// </summary>
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/// <returns></returns>
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public static string GetVersion()
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{
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Version version = Assembly.GetEntryAssembly().GetName().Version;
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return version.ToString();
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}
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/// <summary>
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/// 获取请求跟踪 Id
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/// </summary>
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/// <returns></returns>
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public static string GetTraceId()
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{
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return Activity.Current?.Id ?? (RootServices == null ? default : HttpContext?.TraceIdentifier);
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}
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/// <summary>
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/// 程序启动时，记录目录
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/// </summary>
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/// <param name="env"></param>
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public static void LogWhenStart(IWebHostEnvironment env)
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{
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("程序启动");
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sb.AppendLine("ContentRootPath:" + env.ContentRootPath);
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sb.AppendLine("WebRootPath:" + env.WebRootPath);
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sb.AppendLine("IsDevelopment:" + env.IsDevelopment());
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LogHelper.WriteWithTime(sb.ToString());
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}
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/// <summary>
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/// 设置cache control
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/// </summary>
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/// <param name="context"></param>
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public static void SetCacheControl(StaticFileResponseContext context)
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{
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int second = 365 * 24 * 60 * 60;
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context.Context.Response.Headers.Add("Cache-Control", new[] { "public,max-age=" + second });
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context.Context.Response.Headers.Add("Expires", new[] { DateTime.UtcNow.AddYears(1).ToString("R") }); // Format RFC1123
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}
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public static IEnumerable<Assembly> GetAssemblies()
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{
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var projects = DependencyContext
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.Default
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.RuntimeLibraries
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.Where(u => u.Type == "project" || u.Type == "reference")
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.Select(u => AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(u.Name)));
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return projects;
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}
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/// <summary>
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/// 加载程序集中的所有类型
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/// </summary>
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/// <param name="ass"></param>
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/// <returns></returns>
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private static IEnumerable<System.Type> GetTypes(Assembly ass)
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{
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var types = Array.Empty<System.Type>();
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try
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{
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types = ass.GetTypes();
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}
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catch
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{
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Console.WriteLine($"Error load `{ass.FullName}` assembly.");
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}
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return types.Where(u => u.IsPublic);
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}
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}
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}
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