Source code for airflow.providers.elasticsearch.hooks.elasticsearch

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import warnings
from typing import Any, Dict, List, Optional

from elasticsearch import Elasticsearch
from es.elastic.api import Connection as ESConnection, connect

from airflow.compat.functools import cached_property
from airflow.hooks.base import BaseHook
from airflow.models.connection import Connection as AirflowConnection
from airflow.providers.common.sql.hooks.sql import DbApiHook


[docs]class ElasticsearchSQLHook(DbApiHook):
    """
    Interact with Elasticsearch through the elasticsearch-dbapi.

    This hook uses the Elasticsearch conn_id.

    :param elasticsearch_conn_id: The :ref:`ElasticSearch connection id <howto/connection:elasticsearch>`
        used for Elasticsearch credentials.
    """

[docs]    conn_name_attr = 'elasticsearch_conn_id'
[docs]    default_conn_name = 'elasticsearch_default'
[docs]    conn_type = 'elasticsearch'
[docs]    hook_name = 'Elasticsearch'

    def __init__(self, schema: str = "http", connection: Optional[AirflowConnection] = None, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.schema = schema
        self.connection = connection

[docs]    def get_conn(self) -> ESConnection:
        """Returns a elasticsearch connection object"""
        conn_id = getattr(self, self.conn_name_attr)
        conn = self.connection or self.get_connection(conn_id)

        conn_args = dict(
            host=conn.host,
            port=conn.port,
            user=conn.login or None,
            password=conn.password or None,
            scheme=conn.schema or "http",
        )

        if conn.extra_dejson.get('http_compress', False):
            conn_args["http_compress"] = bool(["http_compress"])

        if conn.extra_dejson.get('timeout', False):
            conn_args["timeout"] = conn.extra_dejson["timeout"]

        conn = connect(**conn_args)

        return conn

[docs]    def get_uri(self) -> str:
        conn_id = getattr(self, self.conn_name_attr)
        conn = self.connection or self.get_connection(conn_id)

        login = ''
        if conn.login:
            login = '{conn.login}:{conn.password}@'.format(conn=conn)
        host = conn.host
        if conn.port is not None:
            host += f':{conn.port}'
        uri = '{conn.conn_type}+{conn.schema}://{login}{host}/'.format(conn=conn, login=login, host=host)

        extras_length = len(conn.extra_dejson)
        if not extras_length:
            return uri

        uri += '?'

        for arg_key, arg_value in conn.extra_dejson.items():
            extras_length -= 1
            uri += f"{arg_key}={arg_value}"

            if extras_length:
                uri += '&'

        return uri


[docs]class ElasticsearchHook(ElasticsearchSQLHook):
    """
    This class is deprecated and was renamed to ElasticsearchSQLHook.
    Please use `airflow.providers.elasticsearch.hooks.elasticsearch.ElasticsearchSQLHook`.
    """

    def __init__(self, *args, **kwargs):
        warnings.warn(
            """This class is deprecated.
            Please use `airflow.providers.elasticsearch.hooks.elasticsearch.ElasticsearchSQLHook`.""",
            DeprecationWarning,
            stacklevel=3,
        )
        super().__init__(*args, **kwargs)


[docs]class ElasticsearchPythonHook(BaseHook):
    """
    Interacts with Elasticsearch. This hook uses the official Elasticsearch Python Client.

    :param hosts: list: A list of a single or many Elasticsearch instances. Example: ["http://localhost:9200"]
    :param es_conn_args: dict: Additional arguments you might need to enter to connect to Elasticsearch.
                                Example: {"ca_cert":"/path/to/cert", "basic_auth": "(user, pass)"}
    """

    def __init__(self, hosts: List[Any], es_conn_args: Optional[dict] = None):
        super().__init__()
        self.hosts = hosts
        self.es_conn_args = es_conn_args if es_conn_args else {}

    def _get_elastic_connection(self):
        """Returns the Elasticsearch client"""
        client = Elasticsearch(self.hosts, **self.es_conn_args)

        return client

    @cached_property
[docs]    def get_conn(self):
        """Returns the Elasticsearch client (cached)"""
        return self._get_elastic_connection()

[docs]    def search(self, query: Dict[Any, Any], index: str = "_all") -> dict:
        """
        Returns results matching a query using Elasticsearch DSL

        :param index: str: The index you want to query
        :param query: dict: The query you want to run

        :returns: dict: The response 'hits' object from Elasticsearch
        """
        es_client = self.get_conn
        result = es_client.search(index=index, body=query)
        return result['hits']