How to create links to rtc_cm:parent or child ChangeRequest

SDKs Lyo
1

Hello,

using oslc4j I can create a ChangeRequest and provide related.
But how is it possible to create links to parent or child ChangeRequest?

When I look in the rdf representation of a CCM item, I can find parent item.
How can I get and create parent items by using the oslc4j?

<rtc_cm:com.ibm.team.workitem.linktype.parentworkitem.parent rdf:resource=“https://XYZ/ccmf/resource/itemName/com.ibm.team.workitem.WorkItem/145204”/>

Many thanks…

2

Hi @maxler05,

Did you check the https://download.eclipse.org/lyo/docs/core/2.4.0/org/eclipse/lyo/oslc4j/core/model/AbstractResource.html#getExtendedProperties-- method?

–Andrew

3

Hi Andrew,

thanks for your response.

I tried it now with extendedProperties:

The first step was to take a workitem which has an parent relation, and checking if I can find it with the oslc api → I could find it under extendendProperties, same for child releations:

{QName@5278} “{RtcCmVocabulary < LinkedData < TWiki}com.ibm.team.workitem.linktype.parentworkitem.parent” → {URI@5279} “https://XYZ/ccmfed/resource/itemName/com.ibm.team.workitem.WorkItem/145760”

Now I tried with the QName from the example above:

String type = "com.ibm.team.workitem.workItemType.featurerequest";
String configurationContext = "_yoMVoBT6Eeu9VOClgNyCps";
 
ChangeRequest changeRequest = new ChangeRequest();
changeRequest.setTitle("TITLE");
changeRequest.setDescription("DESC");

changeRequest.getExtendedProperties().put(new QName("http://jazz.net/xmlns/prod/jazz/rtc/cm/1.0/", "com.ibm.team.workitem.linktype.parentworkitem.parent"), "https://XYZ/ccmfed/resource/itemName/com.ibm.team.workitem.WorkItem/145760");

String factoryUrl = JAZZ_CONNECTION.getUrl() + "/oslc/contexts/" + configurationContext + "/workitems/" + type;

javax.ws.rs.core.Response creationResponse = OslcClientHelper.getOslcClient(JAZZ_CONNECTION).createResource(
                factoryUrl, changeRequest,
                OslcMediaType.APPLICATION_RDF_XML,
                OslcMediaType.APPLICATION_RDF_XML);

This failed with the following message:

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:oslc="http://open-services.net/ns/core#" > 
  <rdf:Description rdf:nodeID="A0">
    <oslc:message>Missing expected parameter: http://www.w3.org/1999/02/22-rdf-syntax-ns#resource</oslc:message>
    <oslc:statusCode>400</oslc:statusCode>
    <rdf:type rdf:resource="http://open-services.net/ns/core#Error"/>
  </rdf:Description>
</rdf:RDF>

Any ideas why this happens and how to solve that…

Best regards
Steve

4

Hello Steve,

First, changeRequest.getExtendedProperties().put(new QName("http://jazz.net/xmlns/prod/jazz/rtc/cm/1.0/", "com.ibm.team.workitem.linktype.parentworkitem.parent"), "https://XYZ/ccmfed/resource/itemName/com.ibm.team.workitem.WorkItem/145760"); should be URI.create("https://XYZ/ccmfed/resource/itemName/com.ibm.team.workitem.WorkItem/145760"). RDF is strict on typing.

Second, http://www.w3.org/1999/02/22-rdf-syntax-ns#resource is essentially the subject of the RDF resource. You can supply it via https://download.eclipse.org/lyo/docs/core/2.4.0/org/eclipse/lyo/oslc4j/core/model/AbstractResource.html#AbstractResource-java.net.URI-. If you get confused about RDF easily, I recommend using Apache Jena RIOT tools or https://www.easyrdf.org/converter if you are in a hurry and convert the RDF/XML or JSON-LD or N-Triples (all legal RDF formats) to Turtle (the most human-readable format).

I have no idea about the specific requirements for the URI required by Jazz CF endpoint. See https://github.com/OSLC/lyo-samples/blob/master/oslc4j-client-samples/src/main/java/org/eclipse/lyo/oslc4j/client/samples/EWMSample.java#L171-L203 as well. It does not seem to set any URI in the constructor there, so I am not entirely sure as to what’s going on. Try making a random URI, creation factories frequently ignore it and return you a new URI for the created resource. Wait a second, why are you creating a resource? I think you should call https://download.eclipse.org/lyo/docs/oslc-java-client/latest/org/eclipse/lyo/client/oslc/OslcClient.html#updateResource-java.lang.String-java.lang.Object-java.lang.String- ?

–Andrew

1 Like
5

Andrew,

thanks for your good hints (e.g. strict typing, easyrdf, updateResource).

You was right, you can only link parents of already existing workitems -> take an existing ChangeRequest + add the link as shown in my example code + updating that ChnageRequest works.

-Steve

1 Like