/// <summary>
/// 创建上下文
/// </summary>
/// <param name="apiDescriptor"> api描述 </param>
/// <param name="dataProvider"> 数据提供程序 </param>
/// <param name="resultUpdater"> 返回值更新程序 </param>
/// <returns>如果编译失败,返回异常信息</returns>
public ApiCallContext CreateContext(ApiDescriptor apiDescriptor, IApiDataProvider dataProvider, out IResultUpdater resultUpdater)
{
if (ApiCollection.Apis.Contains(apiDescriptor ?? throw new ArgumentNullException(nameof(apiDescriptor))) == false)
{
throw new ArgumentException("API描述不属于当前容器", nameof(apiDescriptor));
}
var logger = Provider.Logger.GetUsableService(false); //获取日志服务
ApiCallContext context = null;
try
{
var instance = apiDescriptor.Method.IsStatic
? null
: dataProvider.GetApiInstance(apiDescriptor) ??
Activator.CreateInstance(apiDescriptor.ApiClass.Type);
resultUpdater = Provider.CreateResultUpdater() ?? new ResultProvider();
var session = dataProvider.GetSession();
context = new ApiCallContext(instance, apiDescriptor.Method, resultUpdater, session, logger);
context.Data["$ResultProvider"] = resultUpdater;
context.Data["$ApiContainer"] = this;
context.Data["$ApiDescriptor"] = apiDescriptor;
logger?.Append(new LogItem()
{
Context = context,
Level = LogLevel.Debug,
Message = "创建上下文",
Title = "系统",
});
if (session != null)
{
EventCaller.Invoke(GlobalEvents.OnBeginRequest, context);
}
var parameters = context.Parameters;
var properties = context.Properties;
//属性
if (apiDescriptor.Method.IsStatic == false)
{
foreach (var p in apiDescriptor.Properties)
{
var result = dataProvider.GetProperty(p);
if (result.Error != null && result.Exists)
{
properties.Add(p.Name, result.Error);
resultUpdater.SetException(result.Error);
return(context);
}
if (result.Exists || p.HasDefaultValue == false)
{
var value = result.Exists ? result.Value : null;
if (p.DataModifications.Count > 0)
{
p.DataModifications.ForEach(it => it.Modifies(ref value, context)); //变更数据
}
Modifier.Modifies(value, context);
if (result.Exists)
{
properties.Add(p.Name, value);
p.Setter(instance, value);
}
if (p.DataValidations.Count > 0)
{
var ex = p.DataValidations.FirstOrDefault(it => it.IsValid(value, context) == false)?
.GetException(p.Name, value, context)
?? Validator.IsValid(value, context, true); //数据验证
if (ex != null)
{
resultUpdater.SetException(ex);
return(context);
}
}
}
else
{
properties.Add(p.Name, p.DefaultValue);
p.Setter(instance, p.DefaultValue);
}
}
}
//参数
foreach (var p in apiDescriptor.Parameters)
{
if (p.ParameterType == typeof(ISession))
{
parameters.Add(p.Name, session);
continue;
}
if (p.ParameterType == typeof(ApiCallContext))
{
parameters.Add(p.Name, context);
continue;
}
if (p.ParameterType == typeof(ILogger))
{
parameters.Add(p.Name, logger);
continue;
}
var result = dataProvider.GetParameter(p);
if (result.Error != null && result.Exists)
{
parameters.Add(p.Name, result.Error);
resultUpdater.SetException(result.Error);
return(context);
}
if (result.Exists)
{
var value = result.Value;
if (p.DataModifications.Count > 0)
{
p.DataModifications.ForEach(it => it.Modifies(ref value, context)); //变更数据
}
Modifier.Modifies(value, context);
parameters.Add(p.Name, value);
if (p.DataValidations.Count > 0)
{
var ex = p.DataValidations.FirstOrDefault(it => it.IsValid(value, context) == false)?.GetException(p.Name, value, context)
?? Validator.IsValid(value, context, true); //数据验证
if (ex != null)
{
resultUpdater.SetException(ex);
return(context);
}
}
}
else if (p.HasDefaultValue)
{
parameters.Add(p.Name, p.DefaultValue);
}
else
{
var ex = ApiException.ArgumentMissing(p.Name);
parameters.Add(p.Name, ex);
resultUpdater.SetException(ex);
return(context);
}
}
EventCaller.Invoke(GlobalEvents.OnApiDataParsed, context);
return(context);
}
catch (Exception ex)
{
logger?.Append(new LogItem()
{
Context = context,
Exception = ex,
Level = LogLevel.Critical,
Message = "未处理异常",
Title = "系统",
});
EventCaller.Invoke(GlobalEvents.OnUnprocessException, context);
throw;
}
finally
{
if (context?.IsError == true)
{
var ex = context.Exception.GetRealException();
if (ex is ApiException e)
{
context.Warning(e.Message, "逻辑异常");
if (e.InnerException != null)
{
context.Warning(e.InnerException, "内部逻辑异常");
}
EventCaller.Invoke(GlobalEvents.OnApiException, context);
}
else
{
context.Error(context.Exception, "服务器内部错误");
EventCaller.Invoke(GlobalEvents.OnUnprocessException, context);
}
}
}
}