How to get/use indexPatternService in server side api in kibana plugin

[Riddhesh]

I want to use indexPatternService on server api side of plugin, e.g. to get fields for a pattern(/api/index_patterns/_fields_for_wildcard).

I know in server there is indexPatternsServiceFactory, but I don't know how to get service from it or how to use it.
I was able to get savedObjectClient with below code(found it from kibana's source code), I know something similar is needed for indexPattern. Any example is very much appreciated.

init(server, options) {
  server.route({
    path: '/api/manage/something',
    method: 'GET',
    async handler(req, reply) {
      const { SavedObjectsClient, getSavedObjectsRepository } = server.savedObjects;
      const { callWithInternalUser } = server.plugins.elasticsearch.getCluster(
        'admin'
      );
      const internalRepository = getSavedObjectsRepository(callWithInternalUser);
      const savedObjectClint = new SavedObjectsClient(internalRepository);

      reply("Hello World");
    }
  });
}

kibana version 6.4.2

Thanks!

[lukas (Lukas Olson)]

Not sure if it was available in 6.4.2, but have you tried accessing it from the req object?

const indexPatterns = req.getIndexPatternsService();

[Riddhesh]

@lukas, req.getIndexPatternsService() works! don't know why I didn't print the req object! Thanks a lot. Also it has getSavedObjectsClient() as well.
Although I've got the service I'm getting 401 authentication error if I try to do:

await req.getIndexPatternsService().getFieldsForWildcard('test')
or
await req.getSavedObjectsClient().get('index-pattern', 'abcd-1234-abcd')

How can we specify to use admin cluster, so it will use auth from kibana config to call es?

Thanks!

[lukas (Lukas Olson)]

Hmm, in that case you'll probably have to use the factory. Maybe this will work:

const { callWithInternalUser } = server.plugins.elasticsearch.getCluster('admin');
const indexPatterns = server.indexPatternsServiceFactory({ callCluster: callWithInternalUser });

[Riddhesh]

@lukas, yes, this works! Thank you very much.