WSO2有效负载工厂从xml响应保留标签

Question

在我的代理中，我呼叫了一个远程休息服务，该服务以如下消息响应我：

<omim version="1.0">
<entryList>
  <entry>
    <prefix>#</prefix>
    <mimNumber>230900</mimNumber>
    <status>live</status>
    <titles>
        <preferredTitle>GAUCHER DISEASE, TYPE II</preferredTitle>
        <alternativeTitles>GD II;;</alternativeTitles>
     </titles>
     <clinicalSynopsis>
         <inheritance>Autosomal recessive</inheritance>
         <growthWeight>Poor weight gain </growthWeight>
          <growthOther>Failure to thrive </growthOther>
          <headAndNeckEyes>Convergent squint</headAndNeckEyes>
          <headAndNeckMouth>Trismus </headAndNeckMouth>
          <respiratory>Apnea</respiratory>
          <respiratoryLarynx>Laryngeal spasms</respiratoryLarynx>
          <respiratoryLung>Recurrent aspiration pneumonia</respiratoryLung>
          <abdomenExternalFeatures>Protruberantabdomen</abdomenExternalFeatures>
          <abdomenLiver>Hepatomegaly</abdomenLiver>
          <abdomenSpleen>Splenomegaly</abdomenSpleen>
          <abdomenGastrointestinal>Dysphagia </abdomenGastrointestinal>
          <neurologicCentralNervousSystem>Progressive neurologic deterioration</neurologicCentralNervousSystem>
          <hematology>Thrombocytopenia</hematology>
          <laboratoryAbnormalities>Decreased acid beta galactosidase protein and activity</laboratoryAbnormalities>
          <miscellaneous>Onset between 3 and 6 months of age</miscellaneous>
          <molecularBasis>Caused by mutation in the acid beta-glucosidase gene</molecularBasis>
     </clinicalSynopsis>
    </entry>
  </entryList>
</omim>

我需要从此消息中过滤一些数据并构建具有以下结构的自定义消息：

<clinicalManifestation>
    <nonNeurological>
         $1
    </nonNeurological>
</clinicalManifestation>

$ 1，也许使用有效负载工厂？ 应该填充从先前响应消息中提取的一些叶子，例如：

<clinicalManifestation>
    <nonNeurological>
         <growthWeight>Poor weight gain </growthWeight>
          <growthOther>Failure to thrive </growthOther>
          <headAndNeckEyes>Convergent squint</headAndNeckEyes>
          <headAndNeckMouth>Trismus </headAndNeckMouth>
          <respiratory>Apnea</respiratory>
          <respiratoryLarynx>Laryngeal spasms</respiratoryLarynx>
          <respiratoryLung>Recurrent aspiration pneumonia</respiratoryLung>
          <abdomenExternalFeatures>Protruberantabdomen</abdomenExternalFeatures>
          <abdomenLiver>Hepatomegaly</abdomenLiver>
          <abdomenSpleen>Splenomegaly</abdomenSpleen>
          <abdomenGastrointestinal>Dysphagia </abdomenGastrointestinal>
    </nonNeurological>
</clinicalManifestation>

我是否可以在arqs声明（什么表达式？）中使用特定的xpath表达式来使用有效负载工厂。 还是我必须使用其他调解人？ 哪一个？ 你能给我例子吗？

Answer 1

您需要将它们指定为参数。 让我以原始文档中的代码为例。 这里的表达式表示xpath表达式。

<payloadFactory>
      <format>
           <m:checkpriceresponse xmlns:m="http://services.samples/xsd">
               <m:code>$1</m:code>
               <m:price>$2</m:price>
           </m:checkpriceresponse>
      </format>
      <args>
           <arg expression="//m0:symbol" xmlns:m0="http://services.samples/xsd">
           <arg expression="//m0:last" xmlns:m0="http://services.samples/xsd">
      </arg></arg></args>
</payloadFactory>

Answer 2

首先，在outSequence中（获得响应后），您需要从该响应中提取xml标签/字段，并将其存储在属性中，以便我们稍后使用...

例如（使用xpath）：

<property name="growthWeight" expression="//omin/entryList/entry/clinincalSynopsis/growthWeight/text()" scope="default" type="STRING" />
<property name="growthOth" expression="//omin/entryList/entry/clinincalSynopsis/growthOther/text()" scope="default" type="STRING" /> 

等等，如果该xpath不起作用，请参阅（请参阅http://www.w3schools.com/xpath/xpath_syntax.asp ）

您可以将这些属性打印到日志中，以查看它们的设置是否正确：

<log level="custom">
     <property xmlns:ns="http://org.apache.synapse/xsd" name="Extracted:  Growth weight= " expression="$ctx:growthWeight"/>
     <property xmlns:ns="http://org.apache.synapse/xsd" name="Extracted:  Growth other= " expression="$ctx:growthOth"/>
</log>

然后在您的有效负载工厂中，可以将这些属性设置为对客户端的最终响应的参数：

<payloadFactory media-type="xml">
    <format>
        <clinicalManifestation>
            <nonNeurological>
                <growthWeight>$1</growthWeight>
                <growthOther>$2</growthOther>
                    :
                    :
                    :
            </nonNeurological>
        </clinicalManifestation>
    </format>
    <args>
        <arg evaluator="xml"  expression="$ctx:growthWeight" />
        <arg evaluator="xml"  expression="$ctx:growthOth" />
                    :
                    :
                    :
    </args>
</payloadFactory>

Answer 3

感谢大家。 我发现使用xslt介体的更好方法。 我编写了xsl文件，只需将其添加到代理中即可：

<xslt key="myXSL" />

我以更有效的方式处理了xml ...中介者为我提供了更大的灵活性。