在WSO2 ESB中,我创建了一个rest API。此API需要连接到两个不同的服务,并将结果组合在一起。
为此,我使用一个API,在de insequence中发送一个克隆中介,发送相应的消息。这很好。
在结果中,我使用记录器来查看传入的消息。两个都是json并且回来了。然后我想使用聚合调解器来组合这两者。有了这个,我有两个问题:
这可能是什么原因?
这是实际的API:
<?xml version="1.0" encoding="UTF-8"?>
<api xmlns="http://ws.apache.org/ns/synapse" name="Cale-StreetsAPI" context="/Cale-StreetsAPI">
<resource methods="GET" uri-template="/getStreets?lat={lat}&lon={lon}&radius={radius}">
<inSequence>
<property name="aggRoot" scope="default">
<red:jsonObject xmlns:red="redora"/>
</property>
<log description="">
<property name="lat" expression="get-property('uri.var.lat')"/>
<property name="lon" expression="get-property('uri.var.lon')"/>
<property name="radius" expression="get-property('uri.var.radius')"/>
</log>
<clone continueParent="true" id="deCartaStreets">
<target>
<sequence>
<sequence key="DeCartaDDS"/>
</sequence>
</target>
<target>
<sequence>
<sequence key="DeCartaReverseGeo"/>
</sequence>
</target>
</clone>
</inSequence>
<outSequence>
<property name="messageType" value="application/xml" scope="axis2" type="STRING" description="messageType"/>
<log level="full" description="">
<property name="WSANSWER" value="true"/>
</log>
<aggregate>
<completeCondition>
<messageCount min="2" max="-1"/>
</completeCondition>
<onComplete expression="$body/jsonObject">
<enrich>
<source clone="true" xpath="$body//jsonObject"/>
<target type="property" property="ResultItems"/>
</enrich>
<log level="custom">
<property name="ResultItems" expression="get-property('ResultItems')"/>
</log>
<enrich>
<source type="inline" clone="true">
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<JsonResponse xmlns="dummy"/>
</soapenv:Body>
</soapenv:Envelope>
</source>
<target type="envelope"/>
</enrich>
<enrich>
<source type="property" clone="true" property="ResultItems"/>
<target xmlns:red="dummy" action="child" xpath="//red:JsonResponse"/>
</enrich>
<log level="full" description="">
<property name="AGGREGATE_END" value="true"/>
</log>
<property name="messageType" value="application/json" scope="axis2" type="STRING" description="messageType"/>
<send/>
</onComplete>
</aggregate>
</outSequence>
<faultSequence>
<log level="full" category="WARN"/>
</faultSequence>
</resource>
</api>
答案 0 :(得分:0)
我遇到了同样的问题。根据Internet上的帖子数量API不支持聚合。
所以我的解决方案是引入聚合代理服务,它完成了API只调用该代理服务的所有工作。
因此,如果按照以下方式修改解决方案,您应该能够实现预期目标:
<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse" name="AggregatingProxy" transports="local https http" startOnLoad="true" trace="disable">
<target>
<inSequence>
<log level="full"/>
<property name="enclosing_element">
<result xmlns=""/>
</property>
<clone continueParent="true">
<property name="aggRoot" scope="default">
<red:jsonObject xmlns:red="redora"/>
</property>
<log description="">
<property name="lat" expression="get-property('uri.var.lat')"/>
<property name="lon" expression="get-property('uri.var.lon')"/>
<property name="radius" expression="get-property('uri.var.radius')"/>
</log>
<clone continueParent="true" id="deCartaStreets">
<target>
<sequence>
<sequence key="DeCartaDDS"/>
</sequence>
</target>
<target>
<sequence>
<sequence key="DeCartaReverseGeo"/>
</sequence>
</target>
</clone>
</clone>
</inSequence>
<outSequence>
<property name="messageType" value="application/xml" scope="axis2" type="STRING" description="messageType"/>
<log level="full" description="">
<property name="WSANSWER" value="true"/>
</log>
<aggregate>
<completeCondition>
<messageCount min="2" max="-1"/>
</completeCondition>
<onComplete expression="$body/jsonObject">
<enrich>
<source clone="true" xpath="$body//jsonObject"/>
<target type="property" property="ResultItems"/>
</enrich>
<log level="custom">
<property name="ResultItems" expression="get-property('ResultItems')"/>
</log>
<enrich>
<source type="inline" clone="true">
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<JsonResponse xmlns="dummy"/>
</soapenv:Body>
</soapenv:Envelope>
</source>
<target type="envelope"/>
</enrich>
<enrich>
<source type="property" clone="true" property="ResultItems"/>
<target xmlns:red="dummy" action="child" xpath="//red:JsonResponse"/>
</enrich>
<log level="full" description="">
<property name="AGGREGATE_END" value="true"/>
</log>
<property name="messageType" value="application/json" scope="axis2" type="STRING" description="messageType"/>
<send/>
</onComplete>
</aggregate>
</outSequence>
<faultSequence>
<log level="full" category="WARN"/>
</faultSequence>
</target>
</proxy>
API配置:
<api xmlns="http://ws.apache.org/ns/synapse" name="Cale-StreetsAPI" context="/Cale-StreetsAPI">
<resource methods="GET" uri-template="/getStreets?lat={lat}&lon={lon}&radius={radius}">
<inSequence>
<call>
<endpoint>
<address uri="http://localhost:8280/services/AggregatingProxy" format="soap12"></address>
</endpoint>
</call>
<respond/>
</inSequence>
</resource>
</api>
这实际上对我有用,希望对你也有所帮助。
还考虑使用:
<property name="enclosing_element">
<result xmlns=""/>
</property>
...
<onComplete expression="$body/jsonObject" enclosingElementProperty="enclosing_element">
如果您的服务返回不同类型的结果。
谢谢, 弗拉基米尔。