WF4.0 實戰（二十一）：Windows Server AppFabric 宿主 WF4 應用與持久化/追蹤配置

承接上篇 AppFabric 介紹，本文實作 Pizza 訂購系統，示範將 WCF Workflow Service 部署至 AppFabric，並配置 SQL 持久化與自訂追蹤。

系統架構

• ASP.NET 前端：提交訂單、確認訂購
• WF Service：兩階段流程 (取得價格 → 確認訂購)

WF Service 雙階段流程

資料契約

[DataContract(Namespace="urn:pizzas")]
public class PriceResponse
{
    [DataMember] public int OrderId { get; set; }
    [DataMember] public double Price { get; set; }
}

ASP.NET 前端呼叫

protected void Button1_Click(object sender, EventArgs e)
{
    var client = new FeedMeClient("BasicHttpBinding_IFeedMe");
    var prse = client.GetPizzaCost(DropDownList1.Text, int.Parse(TextBox1.Text));
    ViewState["id"] = prse.OrderId;
    Label1.Text = $"訂單號碼：{prse.OrderId} 價格：{prse.Price}";
    client.Close();
}

protected void Button2_Click(object sender, EventArgs e)
{
    if (ViewState["id"] != null)
    {
        var client = new FeedMeClient("BasicHttpBinding_IFeedMe");
        Label1.Text = client.ConfirmOrder(int.Parse(ViewState["id"].ToString()));
        client.Close();
    }
}

部署至 AppFabric 步驟

1. 安裝 AppFabric、Web Deployment Tool
2. 專案右鍵 Build Deployment Package 產生 .zip
3. IIS 新增網站 (Port 90)
4. 匯入套件部署
5. 配置持久化：工作流閒置卸載/持久化時間、連線字串
6. 配置追蹤：建立 .tp 追蹤設定檔，涵蓋工作流實例、活動狀態、變數、錯誤傳播、書簽恢復、自訂追蹤

追蹤設定檔範例

<trackingProfile name="CustomServiceProfile">
  <workflow activityDefinitionId="*">
    <workflowInstanceQueries>
      <workflowInstanceQuery><states><state name="*"/></states></workflowInstanceQuery>
    </workflowInstanceQueries>
    <activityStateQueries>
      <activityStateQuery activityName="GetPizzaCost">
        <states><state name="Closed"/></states>
        <variables><variable name="quantity"/><variable name="type"/></variables>
      </activityStateQuery>
    </activityStateQueries>
    <faultPropagationQueries><faultPropagationQuery faultSourceActivityName="*" faultHandlerActivityName="*"/></faultPropagationQueries>
    <bookmarkResumptionQueries><bookmarkResumptionQuery name="*"/></bookmarkResumptionQueries>
    <customTrackingQueries><customTrackingQuery name="*" activityName="*"/></customTrackingQueries>
  </workflow>
</trackingProfile>

執行效果與 AppFabric 儀表板監控

透過 AppFabrit 管理介面可監控實例執行狀態、檢視追蹤記錄，實現生產級 WF 服務營運。