run_index_init.py

import json
from elasticsearch import Elasticsearch


'''
Index Parameter
'''

INDEX_NAME = "pubmed"
TYPE_NAME = "pubmed_meta"
NUMBER_SHARDS = 1 # keep this as one if no cluster
NUMBER_REPLICAS = 0 

'''
input file path
'''
index_init_config_file = './config/index_init_config.json'


'''
Start Indexing initiation =====================
'''
    
if __name__ == '__main__':

    '''
    Import index initial configuration file
    '''
    with open(index_init_config_file,'r') as f:
        index_init_config = json.load(f) 
    
    '''
    Create a index request body
    '''
    request_body = {
        "settings": {
            "number_of_shards": NUMBER_SHARDS,
            "number_of_replicas": NUMBER_REPLICAS
        },
        "mappings": {
            TYPE_NAME: {
                "properties": index_init_config
            }
        }
    }
    
    '''
    Start elasticsearch
    '''
    es = Elasticsearch()
              

    '''
    Delete old index if exist
    '''
                
    if es.indices.exists(INDEX_NAME):
             res = es.indices.delete(index = INDEX_NAME)
             print("Deleting index %s , Response: %s" % (INDEX_NAME, res))



    '''
    Create new index   
    '''
    res = es.indices.create(index = INDEX_NAME, body = request_body)
    print("Successfully, created index %s , Response: %s" % (INDEX_NAME, res))