Examples of org.apache.vinci.transport.QueryableFrame

org.apache.vinci.transport.QueryableFrame
QueryableFrame is a decorator class that extends Frame. While the Frame decorates its descendents with adder methods for building an XML document, the QueryableFrame further decorates its descendents with getter methods that provide simple "declarative" querying of document values. This supports the important Vinci convention of declarative value access to support evolving service schemas. Descendents of QueryableFrame need only implement the abstract fget(String key) and fgetFirst(String key) methods. Typically you will use VinciFrame, an immediate and concrete descendent of QueryableFrame, for most of your code. QueryableFrame can be extended to simplify implementation of alternate Frame implementations should VinciFrame be inadequate for whatever reason. Note that the getters of QueryableFrame do not search the document recursively. That is, they only search the "top level" tags within the Frame. More sophisticated document search methods should probably be added in orthogonal query processing classes, such as through an XPathProcessor class that understands the QueryableFrame interface.


    checkError(resp);


    ArrayList A = resp.fget("SERVICE");
    Hashtable H;
    QueryableFrame Q;
    ServiceInterface[] S = new ServiceInterface[A.size()];
    for (int i = 0; i < A.size(); i++) {
      Q = (QueryableFrame) A.get(i);


      // Check if it is a Service or a ServiceAlias and parse accordingly
      if (Q.fgetString("TARGET") == null) {
        H = new Hashtable();
        int total = Q.getKeyValuePairCount();
        KeyValuePair P = null;
        for (int j = 0; j < total; j++) {
          P = Q.getKeyValuePair(j);
          if (P.isValueALeaf()) {
            H.put(P.getKey(), P.getValueAsString());
          } else {
            H.put(P.getKey(), P.getValue());
          }
        }


        S[i] = new Service(H);
      } else {
        S[i] = new ServiceAlias(Q.fgetString("NAME"), Q.fgetString("TARGET"));
      }
    }


    return S;
  }

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    H.starttime = resp.fgetString("STARTED");
    ArrayList A = resp.fget("HITS");
    H.hits = new int[A.size()];
    H.types = new String[A.size()];


    QueryableFrame Q;
    for (int i = 0; i < H.hits.length; i++) {
      Q = (QueryableFrame) A.get(i);
      H.hits[i] = Q.fgetInt("COUNT");
      H.types[i] = Q.fgetString("TYPE");
    }


    return H;
  }

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  private ServiceInfo[] constructServiceInfo(ArrayList A, String level, String name) {
    if (level == null)
      level = "-1";


    ServiceInfo[] S = new ServiceInfo[A.size()];
    QueryableFrame L;
    for (int i = 0; i < S.length; i++) {
      L = (QueryableFrame) A.get(i);
      S[i] = new ServiceInfo(name, L.fgetString("HOST"), L.fgetString("PORT"), level, L
              .fgetString("INSTANCE"));
    }


    return S;
  }

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org.apache.vinci.transport.vns.service.NameClient

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