Reason of Strange behaviour of DCR Datum in <Exernal> call

Hi,

I have created a component where I have have given the External call to a Java class which returns a document object. Now here I am facing the below mentioned problem:

I have added DCR Datum as a parameter for external call, this parameter is used just to check where it is selected or not and based on that I am returning the doc object from Java class. I can use a boolean value also but I don,t want my component too complex hence the same DCR Datum I have used in Java as well as in rendering the page. But when my java returns me document object I get all the values which I have put in doc obj. But I am not able to access the DCR values.The above scenario is happened in LS runtime env. However, when the same component I ran in preview mode in Content Center the java call returns the doc obj and DCR also comes as a part of /Properties/Data/Datum/DCR... and component is rendered properly.

Also, I have noticed if I take out the DCR datum outside the tag the data gets available to component but in that case my Java is not able to fetch the parameter.

Please suggest how can I use same Datum for both purposes.

Thanks in Advance

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vpatel

Can you explain your question a little bit better? It is not too clear to me -- not sure about others. Perhaps give a specific example.

SE123

Ok let me rephrase my question again....

1) I have a component with below mentioned Content.xml

<External>
<Parameters>
<Datum Exposed="true" ID="dcrdatum" Name="dcrdatum" Type="DCR">
</Datum>
</Parameters>
com.test.RenderData
<method>getData</method>
</External>

Now the DCR which user will select while creating the page, I want to get the path of that DCR (say /templatedata/content/content.xml) in java.I can achive the same by retreiveing al the parameters received in Request Context
i.e. params.get("dcrdatum").
Based on the value of above parameter I will return some org.dom4j.Document object to the Component and if I get the value as null I will return different org.dom4j.Document object to the Component.

Now, my problem is that In my Appearance.XSL I have written <xsl:value of select="//content/business"> which is trying to fetch the value of node from DCR selected(i.e. dcrdatum).

a) In content center when I run the component in preview mode I get the value of node. But, the same thing I am not receiving on LS environment.
b) To resolve the issue, I have made changes in java where based on the value of "dcrdatum" parameter I have parsed the DCR and added in the document object which I am returning from the component.
c) Also, I have noticed that in content.xml if I take the <Datum Exposed="true" ID="dcrdatum" Name="dcrdatum" Type="DCR">
</Datum> outside the <External> </External> the DCR is accessible to appearence.xsl tags but Java get the value null for "dcrdatum" parameter.

vpatel

1. If all you need is to retrieve that DCR, then you don't need a Java external. Simple DCR Datum should suffice -- unless you are doing some dynamic stuff.

2. Something doesn't seem right if you are seeing one behavior in SP and something different in LS. Check and make sure that your XSL / XPaths are correct. Also make sure you are deploying the correct version of the DCR / XML + Java code to your LS. <<< That would be the first thing that I'd verify.

3. Your item "c" is normal / expected behavior.

SE123

1. If all you need is to retrieve that DCR, then you don't need a Java external. Simple DCR Datum should suffice -- unless you are doing some dynamic stuff.

2. Something doesn't seem right if you are seeing one behavior in SP and something different in LS. Check and make sure that your XSL / XPaths are correct. Also make sure you are deploying the correct version of the DCR / XML + Java code to your LS. <<< That would be the first thing that I'd verify.

3. Your item "c" is normal / expected behavior.

you are correct I am doing dynamic stuff that's why I have used Java External but I don't understand that when I compared the jar files present under /iw-preview/WEB-INF/lib and in LS /WEB-INF/lib are same. Do I need to deploy some other supporting jar as well which is helping in Preview mode to access the DCR data without explicitly adding data to Document Object as a Java External response.

vpatel

you are correct I am doing dynamic stuff that's why I have used Java External but I don't understand that when I compared the jar files present under /iw-preview/WEB-INF/lib and in LS /WEB-INF/lib are same. Do I need to deploy some other supporting jar as well which is helping in Preview mode to access the DCR data without explicitly adding data to Document Object as a Java External response.

This is a custom class so you'll have to figure out which jar files and all that good stuff. I would turn on extensive logging in the custom Java class to make sure that the correct class is being executed and also logging should give you a good idea at what point things are failing.

You'll have to do some troubleshooting/logging/debugging on your own. Without having access to what you've done I don't think there is much help to be offered at this point.

html_table.rptdesign

SE123

Also, the problem I am facing is not only with DCR Datum, I am facing problem wid every datum like String, PageLink etc. if I declare all those in External

parameter_page.rptdesign

vpatel

Verify your Content XML & relevant XSL.... -- again troubleshooting it is probably the only way you'll figure this out.

annu1

Hi,

I also tried the same as you are doing but when i am using the datum as apart of external then its datum info is available to the java class and to the component preview(when we preview the component-return as a part of result xml) but when we try to get the dcr datum or any other datum which is inside external,not getting value in component xslt.

You can return the xml as a part of document to the component (as a result) and use that info in component xslt.

Thanks
Anu

SE123

Hi,

I also tried the same as you are doing but when i am using the datum as apart of external then its datum info is available to the java class and to the component preview(when we preview the component-return as a part of result xml) but when we try to get the dcr datum or any other datum which is inside external,not getting value in component xslt.

You can return the xml as a part of document to the component (as a result) and use that info in component xslt.

Thanks
Anu

Thanks for response Annu, I had tried the same option and it worked for me, but I still feel that I am missing some jar file which should take care of parsing the DCR automatically as internally Interwoven is anyways parsing the same DCR in preview mode and we should not parse it again.

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