[英]WSO2 Payload Factory preserving tag from xml response
In my proxy i call a remote rest service which responses me with a message like this one: 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>
I need to filter some data from this message and build a custom message having this structure: 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>
Where $1, perhaps using payload factory? $ 1,也许使用有效负载工厂? should be filled with some leaves extracted frome the previous response message, for example like this: 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>
Have i to use payload factory using a particular xpath expression in the arqs declaration (what expression? ). 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。 Or should i have to use another mediator? 还是我必须使用其他调解人? Which one? 哪一个? Can you give me and example please? 你能给我例子吗?
You need to specify them as arguments. 您需要将它们指定为参数。 Let me extract a code from the original documentation as an example. 让我以原始文档中的代码为例。 Here the expression means the xpath expression. 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>$2</m:price>
</m:checkpriceresponse>
</format>
<args>
<arg expression="//m0:symbol" xmlns:m0="http://services.samples/xsd">
<arg expression="//m0:last" xmlns:m0="http://services.samples/xsd">
</arg></arg></args>
</payloadFactory>
Firstly ,in your outSequence (after you've gotten response) you would need to extract the xml tags/field's from the that response , and store them in properties so we can use them later... 首先,在outSequence中(获得响应后),您需要从该响应中提取xml标签/字段,并将其存储在属性中,以便我们稍后使用...
For example (using xpath): 例如(使用xpath):
<property name="growthWeight" expression="//omin/entryList/entry/clinincalSynopsis/growthWeight/text()" scope="default" type="STRING" />
<property name="growthOth" expression="//omin/entryList/entry/clinincalSynopsis/growthOther/text()" scope="default" type="STRING" />
etc etc , if that xpath doesn't work see (see http://www.w3schools.com/xpath/xpath_syntax.asp ) 等等,如果该xpath不起作用,请参阅(请参阅http://www.w3schools.com/xpath/xpath_syntax.asp )
You can print these properties to the log to see if they are setting correctly : 您可以将这些属性打印到日志中,以查看它们的设置是否正确:
<log level="custom">
<property xmlns:ns="http://org.apache.synapse/xsd" name="Extracted: Growth weight= " expression="$ctx:growthWeight"/>
<property xmlns:ns="http://org.apache.synapse/xsd" name="Extracted: Growth other= " expression="$ctx:growthOth"/>
</log>
Then in your payload factory, you can set these properties as the parameters of your final response to the client : 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>
thanks to all of you. 感谢大家。 I found a better method using the xslt mediator. 我发现使用xslt介体的更好方法。 I wrote my xsl file and simply by adding this in my proxy: 我编写了xsl文件,只需将其添加到代理中即可:
<xslt key="myXSL" />
i processed the xml in a more efficient way... the mediator provides me more flexibility. 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。
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