diff --git a/swh/scheduler/backend_es.py b/swh/scheduler/backend_es.py index e27ebd8..79c470e 100644 --- a/swh/scheduler/backend_es.py +++ b/swh/scheduler/backend_es.py @@ -1,191 +1,194 @@ # Copyright (C) 2018 The Software Heritage developers # See the AUTHORS file at the top-level directory of this distribution # License: GNU General Public License version 3, or any later version # See top-level LICENSE file for more information """Elastic Search backend """ from copy import deepcopy from swh.core import utils from elasticsearch import Elasticsearch from elasticsearch import helpers DEFAULT_CONFIG = { 'elastic_search': { 'storage_nodes': {'host': 'localhost', 'port': 9200}, 'index_name_prefix': 'swh-tasks', 'client_options': { 'sniff_on_start': False, 'sniff_on_connection_fail': True, 'http_compress': False, }, }, } class SWHElasticSearchClient: def __init__(self, **config): self.config = deepcopy(DEFAULT_CONFIG) self.config.update(config) es_conf = self.config['elastic_search'] options = es_conf.get('client_options', {}) self.storage = Elasticsearch( # nodes to use by default es_conf['storage_nodes'], # auto detect cluster's status sniff_on_start=options['sniff_on_start'], sniff_on_connection_fail=options['sniff_on_connection_fail'], sniffer_timeout=60, # compression or not http_compress=options['http_compress']) self.index_name_prefix = es_conf['index_name_prefix'] # document's index type (cf. ../../data/elastic-template.json) self.doc_type = 'task' def compute_index_name(self, year, month): """Given a year, month, compute the index's name. """ return '%s-%s-%s' % ( self.index_name_prefix, year, '%02d' % month) def index(self, data): """Index given data to elasticsearch. The field 'ended' in data is used to compute the index to index data to. """ date = data['ended'] index_name = self.compute_index_name(date.year, date.month) return self.storage.index(index=index_name, doc_type=self.doc_type, body=data) def mget(self, index_name, doc_ids, chunk_size=500, source=True, log=None): """Retrieve document's full content according to their ids as per source's setup. The `source` allows to retrieve only what's interesting, e.g: - source=True ; gives back the original indexed data - source=False ; returns without the original _source field - source=['task_id'] ; returns only task_id in the _source field Args: index_name (str): Name of the concerned index. doc_ids (generator): Generator of ids to retrieve chunk_size (int): Number of documents chunk to send for retrieval source (bool/[str]): Source of information to return Yields: document indexed as per source's setup """ if isinstance(source, list): source = {'_source': ','.join(source)} else: source = {'_source': str(source).lower()} for ids in utils.grouper(doc_ids, n=1000): res = self.storage.mget(body={'ids': list(ids)}, index=index_name, doc_type=self.doc_type, params=source) if not res: if log: log.error('Error during retrieval of data, skipping!') continue for doc in res['docs']: found = doc.get('found') if not found: msg = 'Doc id %s not found, not indexed yet' % doc['_id'] if log: log.warning(msg) continue yield doc['_source'] def _streaming_bulk(self, index_name, doc_stream, chunk_size=500, log=None): """Bulk index data and returns the successful indexed data's identifier. Args: index_name (str): Name of the concerned index. doc_stream (generator): Generator of documents to index chunk_size (int): Number of documents chunk to send for indexation Yields: document id indexed """ actions = ({'_index': index_name, '_op_type': 'index', '_type': self.doc_type, '_source': data} for data in doc_stream) for ok, result in helpers.streaming_bulk(client=self.storage, actions=actions, chunk_size=chunk_size, raise_on_error=False, raise_on_exception=False): if not ok: if log: log.error('Error during %s indexation. Skipping.' % result) continue yield result['index']['_id'] def is_index_opened(self, index_name: str) -> bool: """Determine if an index is opened or not """ try: self.storage.indices.stats(index_name) return True except Exception: # fails when indice is closed (no other api call found) return False def streaming_bulk(self, index_name, doc_stream, chunk_size=500, source=True, log=None): """Bulk index data and returns the successful indexed data as per source's setup. the `source` permits to retrieve only what's of interest to us, e.g: - source=True ; gives back the original indexed data - source=False ; returns without the original _source field - source=['task_id'] ; returns only task_id in the _source field Args: index_name (str): Name of the concerned index. doc_stream (generator): Document generator to index chunk_size (int): Number of documents chunk to send source (bool, [str]): the information to return """ to_close = False # index must exist if not self.storage.indices.exists(index_name): # server is setup-ed correctly (mappings, settings are # automatically set, cf. /data/README.md) self.storage.indices.create(index_name) # Close that new index (to avoid too much opened indices) to_close = True # index must be opened if not self.is_index_opened(index_name): to_close = True self.storage.indices.open(index_name) - indexed_ids = self._streaming_bulk( - index_name, doc_stream, chunk_size=chunk_size, log=log) - yield from self.mget(index_name, indexed_ids, chunk_size=chunk_size, - source=source, log=log) - # closing it to stay in the same state as prior to the call - if to_close: - self.storage.indices.close(index_name) + try: + indexed_ids = self._streaming_bulk( + index_name, doc_stream, chunk_size=chunk_size) + yield from self.mget( + index_name, indexed_ids, chunk_size=chunk_size, source=source, + log=log) + finally: + # closing it to stay in the same state as prior to the call + if to_close: + self.storage.indices.close(index_name)