java - 使用Rally api v2.0，当我查询订阅对象时，我无法访问工作区列表

这是我用来查询“订阅”，然后返回我要访问的工作空间的引用的代码：

public static String query_for_workspace(String ws, RallyRestApi r) throws IOException{

    String Wspace_ref=null;
    //Read Subscription
    QueryRequest subscriptionRequest = new QueryRequest("Subscriptions");
    subscriptionRequest.setFetch(new Fetch("Name", "Workspaces"));

    QueryResponse subscriptionQueryResponse = r.query(subscriptionRequest);
    String subName = subscriptionQueryResponse.getResults().get(0).getAsJsonObject().get("Name").toString();
    System.out.println("Read Subscription: " + subName);

    // Grab Workspaces Collection
    JsonArray myWorkspaces = subscriptionQueryResponse.getResults().get(0).getAsJsonObject().get("Workspaces").getAsJsonArray();

    // iterates through all workspaces and fetch 'ref' (string attribute) of the useful workspace
    for (int i=0; i<myWorkspaces.size(); i++) {
        JsonObject workspaceObject = myWorkspaces.get(i).getAsJsonObject();
        String workspaceRef = workspaceObject.get("_ref").getAsString();
        GetRequest workspaceRequest = new GetRequest(workspaceRef);
        workspaceRequest.setFetch(new Fetch("Name"));
        GetResponse workspaceResponse = r.get(workspaceRequest);
        JsonObject workspaceObj = workspaceResponse.getObject();
        String workspaceName = workspaceObj.get("Name").getAsString();
        if(workspaceName.equals(ws)){
            System.out.printf("Workspace found ==> %s\n", workspaceName);
            Wspace_ref=workspaceRef;
        }
    }
    return Wspace_ref;
}

错误来自此行：

JsonArray myWorkspaces=subscriptionQueryResponse.getResults().get(0).getAsJsonObject().get("Workspaces").getAsJsonArray();

此代码与1.x API配合使用。如何访问2.x中的工作区列表？

谢谢！

最佳答案

在Rally api v2.0中，出于性能原因，删除了在同一响应中返回子集合的功能。在v2.0中，获取集合将返回一个对象，该对象带有从中获取集合数据的count和url。

在旧版本的WS API中，某些提取列表创建了许多递归调用，并且提取中包含的所有集合使调用相当昂贵。在WS API v2.0中，不会发生这种情况，因为必须进行单独的调用才能获取集合的对象。

因此，我相信，在这种情况下，如果将代码更新为：

public static String query_for_workspace(String ws, RallyRestApi r) throws IOException{

    String Wspace_ref=null;
    //Read Subscription
    QueryRequest subscriptionRequest = new QueryRequest("Subscriptions");

    QueryResponse subscriptionQueryResponse = r.query(subscriptionRequest);
    String subName = subscriptionQueryResponse.getResults().get(0).getAsJsonObject().get("Name").toString();
    System.out.println("Read Subscription: " + subName);

    //Grab Workspaces Collection
    QueryRequest workspaceRequest = new QueryRequest(subscriptionQueryResponse.getResults().get(0).getAsJsonObject().getAsJsonObject("Workspaces"));
    workspaceRequest.setFetch(new Fetch("Name", "_ref”));

    JsonArray myWorkspaces = r.query(workspaceRequest).getResults();

    //Iterate through the Workspaces to find the correct one
    String workspaceName = "";

    for (int i=0; i<myWorkspaces.size(); i++){
        workspaceName = myWorkspaces.get(i).getAsJsonObject().get("Name").getAsString();
        if(workspaceName.equals(ws)){
            System.out.printf("Workspace found ==> %s\n", workspaceName);
            Wspace_ref = myWorkspaces.get(i).getAsJsonObject().get("_ref").getAsString();
        }
    }
    return Wspace_ref;
}

那应该提供您需要的参考。