python类ConnectionError()的实例源码

def use_store(self):
        """
        Opens a database to save data
        """

        logging.info('Using Elasticsearch database')

        self.db = Elasticsearch(
            [self.settings.get('host', 'localhost:9200')],
            )

        try:
            self.db.indices.create(index='mcp-watch', ignore=400) # may exist
        except ConnectionError as feedback:
            logging.error('- unable to connect')
            raise

        return self.db

def reset_store(self):
        """
        Opens a database for points
        """

        logging.info('Resetting Elasticsearch database')

        self.db = Elasticsearch(
            [self.settings.get('host', 'localhost:9200')],
            )

        try:
            self.db.indices.create(index='mcp-watch', ignore=400) # may exist
        except ConnectionError as feedback:
            logging.error('- unable to connect')
            raise

        return self.db

def on_bond(self, bot):
        """
        Creates index on space bonding
        """
        self.db = Elasticsearch(
            [self.get_host()],
            )

        try:
            self.db.indices.create(index=self.index, ignore=400) # may exist
        except ConnectionError as feedback:
            logging.error('- unable to connect')
            raise

def main_loop(self, method, url, params, body, headers=None, ignore=(), timeout=None):
        for attempt in range(self.max_retries + 1):
            connection = self.get_connection()

            try:
                status, headers, data = yield from connection.perform_request(
                        method, url, params, body, headers=headers, ignore=ignore, timeout=timeout)
            except TransportError as e:
                if method == 'HEAD' and e.status_code == 404:
                    return False

                retry = False
                if isinstance(e, ConnectionTimeout):
                    retry = self.retry_on_timeout
                elif isinstance(e, ConnectionError):
                    retry = True
                elif e.status_code in self.retry_on_status:
                    retry = True

                if retry:
                    # only mark as dead if we are retrying
                    self.mark_dead(connection)
                    # raise exception on last retry
                    if attempt == self.max_retries:
                        raise
                else:
                    raise

            else:
                if method == 'HEAD':
                    return 200 <= status < 300

                # connection didn't fail, confirm it's live status
                self.connection_pool.mark_live(connection)
                if data:
                    data = self.deserializer.loads(data, headers.get('content-type'))
                return data

def test_elasticsearch_running(es):
    i = 0
    while i < 5:
        try:
            es.ping()
            assert True
            return
        except ConnectionError:
            i += 1
            sleep(2)

    pytest.fail('Elasticsearch not running (failed to connect after {} tries)'
                .format(str(i)))

def index(self, index, doc_type, body):
        """Store a document in Elasticsearch."""
        try:
            return self.es.index(
                index=index, doc_type=doc_type, body=body)
        except elasticsearch.ConnectionError as e:
            self.logger.exception(
                'Failed to log to elasticsearch: %s', e.error)
            return {}

def __init__(self, name, host, port, doc_type, index):
        self.host = host
        self.port = port
        self.doc_type = doc_type
        self.index = index
        DatabaseInterface.__init__(self,
                                   name=name,
                                   db_type='ElasticSearch',
                                   conn_exception=elasticsearch.ConnectionError,
                                   execution_exception=elasticsearch.ElasticsearchException,
                                   type_converter=self.TYPE_CONVERTER,
                                   deserialize_query=True)

def _get_sniff_data(self, initial=False):
        previous_sniff = self.last_sniff

        # reset last_sniff timestamp
        self.last_sniff = time.time()

        # use small timeout for the sniffing request, should be a fast api call
        timeout = self.sniff_timeout if not initial else None

        tasks = [
            c.perform_request('GET', '/_nodes/_all/http', timeout=timeout)
            # go through all current connections as well as the
            # seed_connections for good measure
            for c in chain(self.connection_pool.connections, (c for c in self.seed_connections if c not in self.connection_pool.connections))
        ]

        done = ()
        try:
            while tasks:
                # execute sniff requests in parallel, wait for first to return
                done, tasks = yield from asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED, loop=self.loop)
                # go through all the finished tasks
                for t in done:
                    try:
                        _, headers, node_info = t.result()
                        node_info = self.deserializer.loads(node_info, headers.get('content-type'))
                    except (ConnectionError, SerializationError) as e:
                        logger.warn('Sniffing request failed with %r', e)
                        continue
                    node_info = list(node_info['nodes'].values())
                    return node_info
            else:
                # no task has finished completely
                raise TransportError("N/A", "Unable to sniff hosts.")
        except:
            # keep the previous value on error
            self.last_sniff = previous_sniff
            raise
        finally:
            # clean up pending futures
            for t in chain(done, tasks):
                t.cancel()