how to make changeset suspend, resume or disacard using RTC client api

Hi All,

How do I change state of changeset using RTC client using jazz client java api. I need to change state(discard, resume, suspend) using java client api.

I have tried below code of snippet, but this is not working

public boolean discardChangeSet(IWorkspaceConnection workspace, List<IChangeSetHandle> changeSetsHandle) throws TeamRepositoryException
    {
        workspace.discardChangeSets(true, changeSetsHandle, null);
    }

public boolean suspendChangeSet(ITeamRepository repo,IWorkspaceHandle workspaceHandle, IWorkspaceConnection workspace, List<IChangeSetHandle> changeSetsHandles) throws TeamRepositoryException
    {
        IScmService scmService  = (IScmService) repo.getClientLibrary(IScmService.class);
        
        IChangeSetHandle[] changeSets = Arrays.copyOf( changeSetsHandles.toArray(), changeSetsHandles.toArray().length, IChangeSetHandle[].class);
        scmService.suspend( workspaceHandle, changeSets, IScmService.DELTA_PER_INVOCATION , null, null);
        //workspace.suspend(changeSetsHandles, null);
     }     

After trying for scmService.suspend method it throws null pointer exception.



public boolean resumeChangeSet(IWorkspaceConnection workspace, List<IChangeSetHandle> changeSetsHandles) throws TeamRepositoryException
    {
        workspace.resume(1, changeSetsHandles, null);
    
    }

Could you please let me how to proceed on this. Sample code would be very much helpful.

Thank you in advance