The goal of this document is to investigate about removal of deprecated code such as Camel
Instruction
To be able to remove the legacy deprecated code the first rule is to isolate it, and after the successfull isolation is to go to the chopping board and do the hard code removal.
Camel
Camel utilizes two types of XML configurations, one such as REST endpoints and the other is the Routes.
The Rest endpoints configuration accepts a specific url such as getUser and getToscaTemplate. As you can see that the getUser redirects the request to the AuthorizationController, and the getToscaTemplate redirects the request to an actual URL Rest endpoint by using a to uri tag direct:get-service-template
<get uri="/v1/user/getUser" produces="text/plain">
<to uri="bean:org.onap.policy.clamp.authorization.UserService?method=getUser()" />
</get>
<get uri="/v2/acm/getToscaTemplate" outType="java.lang.String" bindingMode="off"
produces="application/json">
<route>
<removeHeaders pattern="*"
excludePattern="name|version|instanceName"/>
<doTry>
<to
uri="bean:org.onap.policy.clamp.flow.log.FlowLogOperation?method=startLog(*, 'GET Tosca Service Template ')"/>
<to
uri="bean:org.onap.policy.clamp.authorization.AuthorizationController?method=authorize(*,'cl','','read')"/>
<setHeader name="Content-Type">
<constant>application/json</constant>
</setHeader>
<setProperty name="raiseHttpExceptionFlag">
<simple resultType="java.lang.Boolean">false</simple>
</setProperty>
<to uri="direct:get-service-template"/>
<to
uri="bean:org.onap.policy.clamp.flow.log.FlowLogOperation?method=endLog()"/>
<doCatch>
<exception>java.lang.Exception</exception>
<handled>
<constant>true</constant>
</handled>
<to
uri="bean:org.onap.policy.clamp.flow.log.FlowLogOperation?method=errorLog()"/>
<log loggingLevel="ERROR"
message="GET Tosca Service Template JSON request failed: ${exception.stacktrace}"/>
<setHeader name="CamelHttpResponseCode">
<constant>500</constant>
</setHeader>
<setBody>
<simple>GET Tosca Service Template JSON FAILED</simple>
</setBody>
</doCatch>
</doTry>
</route>
</get>
- Then the receiving routes XML configuration which each router has a unique id get-service-template which nested inside of the tag has a from uri direct:-get-service-template, header configurations as the paramater names and finally it redirects it to a specific REST endpoint url onap/policy/clamp/acm/v2/commission/toscaservicetemplate
<route id="get-service-template">
<from uri="direct:get-service-template"/>
<doTry>
<log loggingLevel="INFO"
message="Getting the tosca service template"/>
<to
uri="bean:org.onap.policy.clamp.flow.log.FlowLogOperation?method=invokeLog('AutomationComposition', 'Getting the tosca service template')"/>
<setHeader name="CamelHttpMethod">
<constant>GET</constant>
</setHeader>
<setHeader name="Content-Type">
<constant>application/json</constant>
</setHeader>
<setProperty name="name">
<simple>${header.name}</simple>
</setProperty>
<setProperty name="version">
<simple>${header.version}</simple>
</setProperty>
<setProperty name="instanceName">
<simple>${header.instanceName}</simple>
</setProperty>
<log loggingLevel="INFO"
message="Endpoint to get Tosca Service Template: {{clamp.config.acm.runtime.url}}/onap/policy/clamp/acm/v2/commission/toscaservicetemplate"></log>
<toD uri="{{clamp.config.acm.runtime.url}}/onap/policy/clamp/acm/v2/commission/toscaservicetemplate?name=${exchangeProperty[name]}&version=${exchangeProperty[version]}&instanceName=${exchangeProperty[instanceName]}&bridgeEndpoint=true&useSystemProperties=true&throwExceptionOnFailure=${exchangeProperty[raiseHttpExceptionFlag]}&authMethod=Basic&authUsername={{clamp.config.acm.runtime.userName}}&authPassword={{clamp.config.acm.runtime.password}}&authenticationPreemptive=true&connectionClose=true"/>
<convertBodyTo type="java.lang.String"/>
<doFinally>
<to uri="direct:reset-raise-http-exception-flag"/>
<to
uri="bean:org.onap.policy.clamp.flow.log.FlowLogOperation?method=invokeReturnLog()"/>
</doFinally>
</doTry>
</route>