Add mappings to an Elasticsearch index in realtime

Changing mapping on existing index is not an easy task. You may find the reason and possible solutions in here:

http://www.elasticsearch.org/blog/changing-mapping-with-zero-downtime/

to get current mapping details, here is the sample code:

ClusterState cs = client.admin().cluster().prepareState().setFilterIndices("myIndex").execute().actionGet().getState();
IndexMetaData imd = cs.getMetaData().index("myIndex")
MappingMetaData mdd = imd.mapping("myType")

Put Mappings In Real time:

private void putMapping() {
if (client != null) {
if (client.admin().indices().prepareExists(IndexName).execute().actionGet().isExists()) {
XContentBuilder mappings = null;
try {
mappings = XContentFactory.jsonBuilder()
.startObject()
.startObject(INDEX_TYPE)
.startObject("properties")
.startObject(FIELD_NAME)
.field("type","string")
.field("store","yes")
.field("index", "analyzed")
.field("analyzer", "simple")
.endObject()
.endObject()
.endObject()
.endObject();
} catch (IOException e) {
e.printStackTrace();
}
client.admin().indices().prepareClose(IndexName).execute().actionGet();
client.admin().indices().prepareDeleteMapping(IndexName).setType(INDEX_TYPE).execute().actionGet();
client.admin().indices().preparePutMapping(IndexName).setIgnoreConflicts(true).setType(INDEX_TYPE).setSource(mappings).execute().actionGet();
client.admin().indices().prepareOpen(IndexName).execute().actionGet();
}

} else {
throw new IllegalStateException(" Elastic Search not initialized properly..");
}
}