Unable to import ccr libraries in ism project

[shivani]

Background:
I’m working on an issue in ISM to add a feature in opensearch index-management plugin. For this, I need to import some classes from opensearch cross-cluster-replication project for the same.
In the ism project, I have added ccr dependency in build.gradle like this

opensearchPlugin "org.opensearch.plugin:opensearch-security:${security_plugin_version}@zip"
opensearchPlugin "org.opensearch.plugin:opensearch-cross-cluster-replication:${ccr_plugin_version}@zip"

Issue:
On running ./gradlew build, it downloads the opensearch-cross-cluster-replication-3.0.0.0-SNAPSHOT.jar under build/tmp/.cache/expanded.
But it does not allow to import classes from this jar in the src code. For ex. import org.opensearch.replication.action.pause does not work and shows unresolved reference.

Expectation: To be able to import classes from ccr project and create request objects for some actions.
How to achieve this? Any helpers will be greatly appreciated!

[shivani]

Hi,

PFA - This is my build.gradle for index-management plugin.
I have tried to ape almost all actions happening with job-scheduler plugin and tried to do the same with ccr plugin. I’ve also tried defining the ccr dependency for compileOnly and implementation, but no luck!

Another thing I’ve noticed : under Project > External Libraries, it does list the cross-cluster-replication jar, but it does not list the classes under this jar.

Meanwhile, for other jars like job-scheduler jar, its underlying classes are clearly visible. For ex. JobDocVersion.java etc.

Questions:

1. one difference is most of the other jars are java-based code, while ccr is based on kotlin. Could this be a problem?
2. Could this be related to access modifiers of the ccr classes? Although as per kotlin docs, default access modifier for all classes is public.

[shivani]

Another observation is:
I have tried to import multiple opensearch-plugins that are based on kotlin - mainly, cross-cluster-replication, index-management, alerting -
For all these, under Project > External Libraries > It displays the dependency as a zip. That is not the case for other opensearch plugin dependencies like job-scheduler (java based).

Under the zip, on expanding further, you can see a few .jars like opensearch-cross-cluster-replication-3.0.0.0-SNAPSHOT.jar but not the classes.

This is in contrast to what we see with java based dependencies as shown in my previous comment.
For all these attempted kotlin dependencies, I am unable to import classes in src code and use.

Would highly appreciate any guidance in this area and are there any changes needed in these dependencies projects too?