對此信息的訪問通過來自 System.Configuration 程序集的 ConfigManager 類來管理。靜態 Get 方法返回信息的集合，這些集合將被枚舉以獲得單個屬性。這些屬性集的設置決定了輔助對象的運行時特征。除了這一配置文件，您還應該創建定義 XML 文件結構的圖元文件，並在其中引用位於服務器 Machine.cfg 配置文件中的圖元文件：
＜?XML version ="1.0"?＞
＜MetaData XMLns="x-schema:CatMeta.xms"＞
＜DatabaseMeta InternalName="MessageService"＞
＜ServerWiring Interceptor="Core_XMLInterceptor"/＞
＜Collection
InternalName="Process" PublicName="ProcessList"
PublicRowName="ProcessDefinition"
SchemaGeneratorFlags="EMITXMLSCHEMA"＞
＜Property InternalName="ProcessName" Type="String" MetaFlags="PRIMARYKEY" /＞
＜Property InternalName="ProcessDesc" Type="String" /＞
＜Property InternalName="ProcessType" Type="Int32" DefaultValue="RoundRobin" ＞
＜Enum InternalName="RoundRobin" Value="0"/＞
＜Enum InternalName="APPSpecific" Value="1"/＞
＜Enum InternalName="Assembly" Value="2"/＞
＜/Property＞
＜Property InternalName="ProcessThreads" Type="Int32" DefaultValue="1" /＞
＜Property InternalName="InputQueue" Type="String" /＞
＜Property InternalName="ErrorQueue" Type="String" /＞
＜Property InternalName="OutputName" Type="String" /＞
＜QueryMeta InternalName="All" MetaFlags="ALL" /＞
＜QueryMeta InternalName="QueryByFile" CellName="__FILE" Operator="EQUAL" /＞
＜/Collection＞
＜Collection
InternalName="Output" PublicName="OutputList"
PublicRowName="OutputDefinition"
SchemaGeneratorFlags="EMITXMLSCHEMA"＞
＜Property InternalName="ProcessName" Type="String" MetaFlags="PRIMARYKEY" /＞
＜Property InternalName="OutputName" Type="String" MetaFlags="PRIMARYKEY" /＞
＜QueryMeta InternalName="All" MetaFlags="ALL" /＞
＜QueryMeta InternalName="QueryByFile" CellName="__FILE" Operator="EQUAL" /＞
＜/Collection＞
＜/DatabaseMeta＞
＜RelationMeta
PrimaryTable="Process" PrimaryColumns="ProcessName"
ForeignTable="Output" ForeignColumns="ProcessName"
MetaFlags="USECONTAINMENT"/＞
＜/MetaData＞
由於 Service 類必須維護一個已創建輔助對象的列表，因此使用了 Hashtable 集合，用於保持類型對象的名稱/數值對列表。Hashtable 不僅支持枚舉，還允許通過關鍵字來查詢值。在應用程序中，XML 進程名稱是唯一的關鍵字：
private Hashtable htWorkers = new Hashtable();
IConfigCollection cWorkers = ConfigManager.Get("ProcessList", new AppDomainSelector());
foreach (IConfigItem ciWorker in cWorkers)
{
WorkerFormatter sfWorker = new WorkerFormatter();
sfWorker.ProcessName = (string)ciWorker["ProcessName"];
sfWorker.ProcessDesc = (string)ciWorker["ProcessDesc"];
sfWorker.NumberThreads = (int)ciWorker["ProcessThreads"];
sfWorker.InputQueue = (string)ciWorker["InputQueue"];
sfWorker.ErrorQueue = (string)ciWorker["ErrorQueue"];
// 計算並定義進程類型
switch ((int)ciWorker["ProcessType"])
{
case 0:
sfWorker.ProcessType = WorkerFormatter.SFProcessType.ProcessRoundRobin;
break;
case 1:
sfWorker.ProcessType = WorkerFormatter.SFProcessType.ProcessAPPSpecific;
break;
case 2:
sfWorker.ProcessType = WorkerFormatter.SFProcessType.ProcessAssembly;
break;
default:
throw new Exception("Unknown Processing Type");
}
// 執行更多的工作以讀取輸出信息
string sProcessName = (string)ciWorker["ProcessName"];
if (htWorkers.ContainsKey(sProcessName))
throw new ArgumentException("Process Name Must be Unique: " + sProcessName);
htWorkers.Add(sProcessName, new CWorker(sfWorker));
}
