我要评论biwen.settings 是一个简易的配置项管理模块,主要的作用就是可以校验并持久化配置项,比如将自己的配置存储到数据库中,json文件中等
使用上也是很简单,只需要在服务中注入配置,
比如我们有一个githubsetting的配置项,我们只需要定义好对象然后注入到service中即可:
[description("github配置")]
public class githubsetting : validationsettingbase<githubsetting>
{
[description("github用户名")]
public string? username { get; set; } = "vipwan";
[description("github仓库")]
public string? repository { get; set; } = "biwen.settings";
[description("github token")]
public string? token { get; set; } = "";
public githubsetting()
{
//验证规则
rulefor(x => x.username).notempty().length(3, 128);
rulefor(x => x.repository).notnull().notempty().length(3, 128);
rulefor(x => x.token).notnull().notempty().length(3, 128);
}
}@inject githubsetting githubsetting;//直接对象注入
尽管这样已经足够好用且便捷,但是对于习惯了使用iconfiguration和ioptions的朋友来说还是有些不习惯,其实实现对iconfiguration的支持还是很简单的,实现一下iconfigurationprovider即可,我们来动手实现一个名为biwensettingconfigurationprovider的provider:
internal class events
{
/// <summary>
/// channel队列
/// </summary>
public static readonly channel<(bool ischanged, string? settingname)> configrationchangedchannel = channel.createunbounded<(bool ischanged, string? settingname)>();
}
internal sealed class biwensettingconfigurationsource(bool autorefresh = true) : iconfigurationsource
{
public iconfigurationprovider build(iconfigurationbuilder builder) => new biwensettingconfigurationprovider(autorefresh);
}
internal class biwensettingconfigurationprovider : configurationprovider, idisposable, iasyncdisposable
{
public biwensettingconfigurationprovider(bool autorefresh)
{
if (settings.serviceregistration.serviceprovider is null)
{
throw new biwenexception("必须首先注册biwen.setting模块,请调用:services.addbiwensettings()");
}
if (autorefresh)
{
startalertasync(cts.token);
}
}
private cancellationtokensource cts = new();
/// <summary>
/// 使用channel通知配置变更,如果有事件更新则重新加载
/// </summary>
/// <param name="cancellationtoken"></param>
/// <returns></returns>
public task startalertasync(cancellationtoken cancellationtoken)
{
_ = task.run(async () =>
{
while (!cancellationtoken.iscancellationrequested)
{
_ = await events.configrationchangedchannel.reader.readasync(cancellationtoken);
load();
//通知配置变更
onreload();
}
}, cancellationtoken);
return task.completedtask;
}
//从settingmanager中加载配置项
public override void load()
{
dictionary<string, string?> dics = [];
using var scope = settings.serviceregistration.serviceprovider.createscope();
var settingmanager = scope.serviceprovider.getrequiredservice<isettingmanager>();
var settings = settingmanager.getallsettings()!;
foreach (var setting in settings)
{
if (setting.settingcontent is null) continue;
if (jsonnode.parse(setting.settingcontent) is not jsonobject json) continue;
foreach (var item in json)
{
dics.tryadd($"{setting.settingname}:{item.key}", item.value?.tostring());
}
}
data = dics;
}
public void dispose()
{
cts.cancel();
events.configrationchangedchannel.writer.complete();
}
public valuetask disposeasync()
{
cts.cancel();
events.configrationchangedchannel.writer.complete();
return valuetask.completedtask;
}
}内部通过channel实现变更通知,
internal class configurationmediratordonehandler(ilogger<configurationmediratordonehandler> logger) : imediratordonehandler
{
public task onpublishedasync<t>(t @event) where t : isetting, new()
{ events.configrationchangedchannel.writer.trywrite((true, typeof(t).name));
logger.loginformation($"setting changed: {typeof(t).name},并通知configuration刷新!");
return task.completedtask;
}
}然后老规矩我们扩展一下iservicecollection:
public static class serviceregistration
{
internal static iservicecollection addbiwensettingconfiguration(this iservicecollection services)
{
//configurationmediratordonehandler
services.addsingleton<imediratordonehandler, configurationmediratordonehandler>();
return services;
}
/// <summary>
/// 提供对iconfiguration,ioptions的支持
/// </summary>
/// <param name="manager"></param>
/// <param name="autorefresh"></param>
/// <returns></returns>
public static configurationmanager addbiwensettingconfiguration(
this configurationmanager manager, iservicecollection servicedescriptors, bool autorefresh = true)
{
var sp = settings.serviceregistration.serviceprovider ?? throw new biwenexception("必须首先注册biwen.setting模块,请调用:services.addbiwensettings()");
//添加订阅
if (autorefresh)
{
servicedescriptors.addbiwensettingconfiguration();
}
iconfigurationbuilder configbuilder = manager;
configbuilder.add(new biwensettingconfigurationsource(autorefresh));
var settings = ass.inallrequiredassemblies.thatinherit(typeof(isetting)).where(x => x.isclass && !x.isabstract).tolist();
//注册isetting
settings.foreach(x =>
{
//ioptions di
manager?.getsection(x.name).bind(getsetting(x, sp));
});
return manager;
}
static object getsetting(type x, iserviceprovider sp)
{
var settingmanager = sp.getrequiredservice<isettingmanager>();
var cache = sp.getrequiredservice<imemorycache>();
//使用缓存避免重复反射
var md = cache.getorcreate($"genericmethod_{x.fullname}", entry =>
{
methodinfo methodload = settingmanager.gettype().getmethod(nameof(settingmanager.get))!;
methodinfo generic = methodload.makegenericmethod(x);
return generic;
});
return md!.invoke(settingmanager, null)!;
}
}最后在启动时调用addbiwensettingconfiguration扩展即可
builder.configuration.addbiwensettingconfiguration(builder.services, true);
最后按下面的形式注册就可以了:
@inject githubsetting githubsetting;//直接对象注入 @inject ioptions<githubsetting> iop; //通过ioptions注入 @inject iconfiguration configuration;//iconfiguration ...
源代码我发布到了github,欢迎star!
https://github.com/vipwan/biwen.settings
https://github.com/vipwan/biwen.settings/tree/master/biwen.settings/extensions/configuration
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