Search Option using an Index shared among multiple instances

[Former user]

For PUMA, we need a solution allowing access to public posts of other PUMA installations. For this we should set up a shared ElasticSearch Index and make it accessible via a new search option (dropdown next to the search field on top of the page).

At org.bibsonomy.lucene.index.manager.LuceneResourceManager.updateIndex in the lucene module, public posts could also be converted to ElasticSearch Documents and put into the shared Index (accessed by the ElasticSearch client which is actually a webservice client)

In order to be prepared to also run PUMA systems as shards in a distributed ElasticSearch Index, we should try to use the NodeClient (but first, without holding data in the client) see http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/_talking_to_elasticsearch.html