具有响应 wso2 调解器的对象列表

Question

我用 'Get' 创建了一个 rest API source.It 在输入中有参数，并使用 In 和 Out mediator 将 json 转换为 soap，然后将 soap 转换为 Json 来制作我的输出。输出是对象列表。如果列表中有多个对象，它会正常工作。但是如果我有一个对象，我希望一个列表包含一个对象作为响应，但输出只是一个对象。并省略列表。我的调解员有什么问题吗？？

这里是JsonToSoap mediator(In mediator) :

<?xml version="1.0" encoding="UTF-8"?>
<sequence name="LivePricesJsonToSoap.xml" trace="disable" xmlns="http://ws.apache.org/ns/synapse">
<property name="HTTP_METHOD" scope="axis2" type="STRING" value="POST"/>
<header name="Action" scope="default" value="http://tempuri.org/ILivePublisher/LivePrices"/>
<property expression="$url:instrumentIsin" name="req.var.instrumentIsin" scope="default" type="STRING"/>
<property expression="$url:since" name="req.var.since" scope="default" type="STRING"/>
<property expression="$url:to" name="req.var.to" scope="default" type="STRING"/>
<property expression="$url:interval" name="req.var.interval" scope="default" type="STRING"/>
<payloadFactory media-type="xml">
    <format>
        <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
            <s:Body>
                <LivePrices xmlns="http://tempuri.org/">
                    <instrumentIsin></instrumentIsin>
                    <since></since>
                    <to></to>
                    <interval></interval>
                </LivePrices>
            </s:Body>
        </s:Envelope>
    </format>
    <args>
        <arg evaluator="xml" expression="get-property('req.var.instrumentIsin')"/>
        <arg evaluator="xml" expression="get-property('req.var.since')"/>
        <arg evaluator="xml" expression="get-property('req.var.to')"/>
        <arg evaluator="xml" expression="get-property('req.var.interval')"/>
    </args>
</payloadFactory>
<property name="messageType" scope="axis2" type="STRING" value="application/soap+xml"/>
</sequence>

和SoapToJson中介者（Out mediator）：

<?xml version="1.0" encoding="UTF-8"?>
<sequence name="LivePricesSoupToJson.xml" trace="disable" xmlns="http://ws.apache.org/ns/synapse">
<payloadFactory media-type="xml">
    <format>
        <m:Response xmlns:m="http://schemas.xmlsoap.org/soap/envelope/"></m:Response>
    </format>
    <args>
        <arg evaluator="xml" expression="//s:Envelope/s:Body/t:LivePricesResponse/t:LivePricesResult/a:Close" xmlns:a="http://schemas.datacontract.org/2004/07/Asa.Mbdp.Platform.Publish.Tmc.Head.Proxy" xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" xmlns:t="http://tempuri.org/"/>
    </args>
</payloadFactory>
<foreach expression="//m:Response/a:Close" 
xmlns:a="http://schemas.datacontract.org/2004/07/Asa.Mbdp.Platform.Publish.Tmc.Head.Proxy" 
xmlns:m="http://schemas.xmlsoap.org/soap/envelope/">
    <sequence>
        <payloadFactory media-type="xml">
            <format>
                <m:LivePrices>
                    <m:Last></m:Last>
                    <m:Price></m:Price>
                    <m:Quantity></m:Quantity>
                    <m:Since></m:Since>
                </m:LivePrices>
            </format>
            <args>
                <arg evaluator="xml" expression="//a:Close/a:Last"/>
                <arg evaluator="xml" expression="//a:Close/a:Price"/>
                <arg evaluator="xml" expression="//a:Close/a:Quantity"/>
                <arg evaluator="xml" expression="//a:Close/a:Since"/>
            </args>
        </payloadFactory>
    </sequence>
</foreach>
<property name="messageType" scope="axis2" type="STRING" value="application/json"/>
</sequence>

对列表中的多个对象的响应是：

{
"Response": {
"LivePrices": [
  {
    "Last": 2100,
    "Price": 2075,
    "Quantity": 29252869,
    "Since": "2018-07-18T00:00:00"
  },
  {
    "Last": 2067,
    "Price": 2067,
    "Quantity": 40790,
    "Since": "2018-07-24T11:04:35"
  },
  {
    "Last": 2067,
    "Price": 2067,
    "Quantity": 40790,
    "Since": "2018-07-24T11:08:35"
   }
  ]
 }
}

并且对一个对象的响应是：

{
"Response": {
"LivePrices": {
  "Last": 1903,
  "Price": 1911,
  "Quantity": 15345096,
  "Since": "2018-07-24T00:00:00"
  }
 }
}

Answer 1

这是 wso2 esb 的预期行为，因为你正在做的是使用属性 "application/json" 盲目地从 XML 转换为 json，所以如果你有只有多个元素，您才能获得对象列表，如果只有一个元素，那么您将获得一个对象作为响应。您需要使用 XSLT 进行如下转换

 <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs" version="2.0" xmlns:fn="http://www.w3.org/2005/xpath-functions">
        <xsl:output method="text" indent="yes" media-type="application/json" encoding="UTF-8"/>
        <xsl:strip-space elements="*"/>
        <xsl:template match="/">{ 
            "Response":{
            "LivePrices":[

            <xsl:for-each select="//LivePrices">
            {
            "Last":"<xsl:value-of select="//Last"/>" ,    
 "Price":"<xsl:value-of select="//Price"/>"        
            }

           <xsl:if test="position()!=last()">,</xsl:if> 

            </xsl:for-each>        
            ]      
            }
            }
        </xsl:template>
         </xsl:stylesheet>

具有响应 wso2 调解器的对象列表

Have list of objects in response with wso2 mediator

list

wso2

mediator