Source code for airflow.operators.pig_operator

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import re

from airflow.hooks.pig_hook import PigCliHook
from airflow.models import BaseOperator
from airflow.utils.decorators import apply_defaults

[docs]class PigOperator(BaseOperator): """ Executes pig script. :param pig: the pig latin script to be executed. (templated) :type pig: string :param pig_cli_conn_id: reference to the Hive database :type pig_cli_conn_id: string :param pigparams_jinja_translate: when True, pig params-type templating ${var} gets translated into jinja-type templating {{ var }}. Note that you may want to use this along with the ``DAG(user_defined_macros=myargs)`` parameter. View the DAG object documentation for more details. :type pigparams_jinja_translate: boolean """ template_fields = ('pig',) template_ext = ('.pig', '.piglatin',) ui_color = '#f0e4ec' @apply_defaults def __init__( self, pig, pig_cli_conn_id='pig_cli_default', pigparams_jinja_translate=False, *args, **kwargs): super(PigOperator, self).__init__(*args, **kwargs) self.pigparams_jinja_translate = pigparams_jinja_translate self.pig = pig self.pig_cli_conn_id = pig_cli_conn_id def get_hook(self): return PigCliHook(pig_cli_conn_id=self.pig_cli_conn_id)
[docs] def prepare_template(self): if self.pigparams_jinja_translate: self.pig = re.sub( "(\$([a-zA-Z_][a-zA-Z0-9_]*))", "{{ \g<2> }}", self.pig)
[docs] def execute(self, context):'Executing: %s', self.pig) self.hook = self.get_hook() self.hook.run_cli(pig=self.pig)
[docs] def on_kill(self): self.hook.kill()