WSO2 Micro Integrator Validate Mediator失败，操作不受支持

Question

在Windows 10中使用Integration Studio。

当我尝试用Validate Mediator的Sequence从REST API主体验证我的负载时，我得到一个错误。错误：

[2020-03-10 11:07:29,295]  INFO {TRACE_LOGGER} - Building message. Sequence <SequenceMediator> is content aware
[2020-03-10 11:07:29,309] ERROR {org.apache.synapse.mediators.base.SequenceMediator} - Unsupported Operation org.apache.axiom.om.OMException: Unsupported Operation
at org.apache.axiom.om.impl.llom.OMTextImpl.getInputStream(OMTextImpl.java:422)
at org.apache.synapse.mediators.builtin.ValidateMediator.mediate(ValidateMediator.java:231)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:214)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
at org.apache.synapse.config.xml.AnonymousListMediator.mediate(AnonymousListMediator.java:37)
at org.apache.synapse.config.xml.SwitchCase.mediate(SwitchCase.java:69)
at org.apache.synapse.mediators.filters.SwitchMediator.mediate(SwitchMediator.java:134)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158)
at org.apache.synapse.rest.Resource.process(Resource.java:331)
at org.apache.synapse.rest.API.process(API.java:440)
at org.apache.synapse.rest.RESTRequestHandler.apiProcessNonDefaultStrategy(RESTRequestHandler.java:149)
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:95)
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:71)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:325)
at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:98)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosingRESTHandler(ServerWorker.java:367)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:412)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:181)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

然后我尝试从中验证：

<?xml version="1.0" encoding="UTF-8"?>
<sequence name="Reserves" statistics="enable" trace="enable" xmlns="http://ws.apache.org/ns/synapse">
<validate cache-schema="false" source="json-eval($)">
<schema key="conf:/schemas/ReservesRoot.json"/>
<on-fail>
<payloadFactory media-type="json">
<format>{"Error":$1"}</format>
<args>
<arg evaluator="xml" expression="$ctx:ERROR_MESSAGE"/>
</args>
</payloadFactory>
<property name="HTTP_SC" scope="axis2" type="STRING" value="500"/>
<respond/>
</on-fail>
</validate>
</sequence>

JSON架构：

{
"$schema": "http://json-schema.org/draft-04/schema#",
"type": "object",
"properties": {
"Type": {
"type": "string"
}
},
"required": [
"Type"
]
}

当我在属性中获取架构时，我会看到该架构的字符串。

<property value="get-property('registry', 'conf:/schemas/ReservesRoot.json')" name="ReservesSchema"/>
<log>
<property expression="get-property('ReservesSchema')" name="JSON_P"/>
</log>

Answer 1

当注册表中保存的JSON模式没有正确的媒体类型(必须是application/JSON(时，就会出现此问题。你能在Integration studio的资源编辑器视图中仔细检查一下吗。

您可以通过右键单击注册表资源项目->注册表资源编辑器来访问资源编辑器视图

Answer 2

此问题发生在Micro积分器中。Micro integrator没有rdbms注册表项目。因此，我们无法指定媒体类型。解决方法是添加带有验证json模式的本地入口文件，并在synapse中引用它。

<validate cache-schema="false">
<schema key="createotpvalidate"/>
<on-fail>
<payloadFactory media-type="json">
<format>{"Error":$1"}</format>
<args>
<arg evaluator="xml" expression="$ctx:ERROR_MESSAGE"/>
</args>
</payloadFactory>
<property name="HTTP_SC" scope="axis2" type="STRING" value="500"/>
<respond/>
<!-- <schema key="conf:/schema/CreateOTPSchema.json"/> -->
</on-fail>
</validate>
Local Entry file:
<?xml version="1.0" encoding="UTF-8"?>
<localEntry key="createotpvalidate" xmlns="http://ws.apache.org/ns/synapse"><![CDATA[{  "$schema": "http://json-schema.org/draft-04/schema#",  "type": "object",  "properties": {            "request_type": {              "type": "string"            },"mobile": {              "type": "string"            },"otp": {              "type": "string"            }          },          "required": [            "request_type","mobile","otp"          ]        }]]></localEntry>