我有一个应用程序是 Mule 3，现在我需要将它迁移到 Mule 4。
我实现并更改了一些代码，但它通过不支持标记的异常，即不支持“rest-router”。
<rest-router:router templateUri="${igate.url}">
<!--Migration ERROR: The migration of 'rest-router' is not supported.-->
<!-- For more information refer to:-->
<!-- * https://docs.mulesoft.com/mule-runtime/4.1/migration-connectors>--
<!-- * https://beta.docs.stgx.mulesoft.com/beta-mule-migration-tool/mule-runtime/4.1/migration-tool.html#unsupported_connectors-->
<rest-router:post>
<ee:transform xmlns:ee="http://www.mulesoft.org/schema/mule/ee/core" doc:name="JSON to Object">
<ee:message>
<ee:set-payload>%dw 2.0 output application/java --- payload as Object { class: 'com.ifi.igate.model.Transaction'}</ee:set-payload>
</ee:message>
</ee:transform>
<flow-ref name="igate-object-flow" doc:name="igate-object-flow" />
<ee:transform xmlns:ee="http://www.mulesoft.org/schema/mule/ee/core" doc:name="Object to JSON" mimeType="application/json">
<ee:message>
<ee:set-payload>%dw 2.0 output application/json --- payload</ee:set-payload>
</ee:message>
</ee:transform>
</rest-router:post>
</rest-router:router>
我们需要在 Mule 4 上迁移的 Mule 3 中的完整 XML 文件 -
<spring:beans>
<spring:bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<spring:property name="ignoreUnresolvablePlaceholders" value="true"/>
<spring:property name="location" value="igate.properties"/>
</spring:bean>
<spring:bean id="validation" class="com.ifi.igate.integration.iclient.ValidationTransformer">
<spring:property name="transactionTypes">
<spring:list>
<spring:value>INQ-REQ</spring:value>
<spring:value>DEP-REQ</spring:value>
<spring:value>WIT-REQ</spring:value>
</spring:list>
</spring:property>
</spring:bean>
<spring:bean id="iGateStub" class="com.ifi.igate.stub.IGateStub">
<spring:property name="handlers">
<spring:map>
<spring:entry key="INQ-REQ">
<spring:bean class="com.ifi.igate.stub.handlers.InqHandler"/>
</spring:entry>
<spring:entry key="WIT-REQ">
<spring:bean class="com.ifi.igate.stub.handlers.WitHandler"/>
</spring:entry>
<spring:entry key="DEP-REQ">
<spring:bean class="com.ifi.igate.stub.handlers.DepHandler"/>
</spring:entry>
</spring:map>
</spring:property>
</spring:bean>
</spring:beans>
<rest-router:config/>
<http:connector name="httpConnector" doc:name="HTTP\HTTPS">
<receiver-threading-profile maxThreadsActive="10" />
</http:connector>
<flow name="igate-json-flow" doc:name="igate-json-flow">
<http:inbound-endpoint exchange-pattern="request-response" host="${igate.host}" port="${igate.port}" doc:name="HTTP"/>
<rest-router:router templateUri="${igate.url}">
<rest-router:post>
<json:json-to-object-transformer xmlns:json="http://www.mulesoft.org/schema/mule/json" returnClass="com.ifi.igate.model.Transaction" doc:name="JSON to Object"></json:json-to-object-transformer>
<flow-ref name="igate-object-flow" doc:name="igate-object-flow"/>
<json:object-to-json-transformer xmlns:json="http://www.mulesoft.org/schema/mule/json" doc:name="Object to JSON" mimeType="application/json"></json:object-to-json-transformer>
</rest-router:post>
</rest-router:router>
<rest-router:router templateUri="${igate-stub.url}">
<rest-router:post>
<json:json-to-object-transformer xmlns:json="http://www.mulesoft.org/schema/mule/json" returnClass="com.ifi.igate.model.Transaction" doc:name="JSON to Object"/>
<component doc:name="IGateStub">
<spring-object bean="iGateStub"/>
</component>
<json:object-to-json-transformer xmlns:json="http://www.mulesoft.org/schema/mule/json" doc:name="Object to JSON" mimeType="application/json"/>
</rest-router:post>
</rest-router:router>
</flow>
<sub-flow name="igate-object-flow" doc:name="igate-object-flow">
<transformer ref="validation"/>
<choice>
<when expression="#[message.payload.trxstatus == 0]">
<logger message="#[message.payload.trxreason]" level="ERROR" doc:name="Logger"/>
</when>
<otherwise>
<set-variable variableName="request" value="#[message.payload]" doc:name="save request"/>
<flow-ref name="promotions-flow" doc:name="Promotions Flow"/>
<flow-ref name="ifi-membership-flow" doc:name="Accumulate Spending"/>
<!-- logger message="Before backend" level="ERROR" doc:name="Logger"/-->
<flow-ref name="rewards-flow" doc:name="Rewards Flow"/>
<choice>
<when expression="#[message.payload.values['PTS']>0 || message.payload.trxtype=='INQ-REQ']">
<flow-ref name="${igate.membership}-membership-flow" doc:name="External Membership Flow"/>
</when>
<otherwise>
<vm:outbound-endpoint exchange-pattern="request-response" path="membership/ifi" />
</otherwise>
</choice>
<!-- logger message="After backend" level="ERROR" doc:name="Logger"/-->
<flow-ref name="promotions-flow" doc:name="Promotions Flow"/>
<flow-ref name="rewards-flow" doc:name="Rewards Flow"/>
<flow-ref name="ifi-membership-flow" doc:name="Manage balances"/>
<flow-ref name="pricing-flow" doc:name="Pricing Flow"/>
</otherwise>
</choice>
</sub-flow>
</mule>
Mule 4 不支持“rest-router”，只需替换该标签或如何将其迁移到 Mule 4。