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test_pool.py
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test_pool.py
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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import unittest
from airflow import settings
from airflow.models import DAG
from airflow.models.pool import Pool
from airflow.models.taskinstance import TaskInstance as TI
from airflow.operators.dummy import DummyOperator
from airflow.utils import timezone
from airflow.utils.state import State
from tests.test_utils.db import clear_db_pools, clear_db_runs, set_default_pool_slots
DEFAULT_DATE = timezone.datetime(2016, 1, 1)
class TestPool(unittest.TestCase):
def setUp(self):
clear_db_runs()
clear_db_pools()
def tearDown(self):
clear_db_runs()
clear_db_pools()
def test_open_slots(self):
pool = Pool(pool='test_pool', slots=5)
dag = DAG(
dag_id='test_open_slots',
start_date=DEFAULT_DATE,
)
op1 = DummyOperator(task_id='dummy1', dag=dag, pool='test_pool')
op2 = DummyOperator(task_id='dummy2', dag=dag, pool='test_pool')
ti1 = TI(task=op1, execution_date=DEFAULT_DATE)
ti2 = TI(task=op2, execution_date=DEFAULT_DATE)
ti1.state = State.RUNNING
ti2.state = State.QUEUED
session = settings.Session
session.add(pool)
session.add(ti1)
session.add(ti2)
session.commit()
session.close()
assert 3 == pool.open_slots() # pylint: disable=no-value-for-parameter
assert 1 == pool.running_slots() # pylint: disable=no-value-for-parameter
assert 1 == pool.queued_slots() # pylint: disable=no-value-for-parameter
assert 2 == pool.occupied_slots() # pylint: disable=no-value-for-parameter
assert {
"default_pool": {
"open": 128,
"queued": 0,
"total": 128,
"running": 0,
},
"test_pool": {
"open": 3,
"queued": 1,
"running": 1,
"total": 5,
},
} == pool.slots_stats()
def test_infinite_slots(self):
pool = Pool(pool='test_pool', slots=-1)
dag = DAG(
dag_id='test_infinite_slots',
start_date=DEFAULT_DATE,
)
op1 = DummyOperator(task_id='dummy1', dag=dag, pool='test_pool')
op2 = DummyOperator(task_id='dummy2', dag=dag, pool='test_pool')
ti1 = TI(task=op1, execution_date=DEFAULT_DATE)
ti2 = TI(task=op2, execution_date=DEFAULT_DATE)
ti1.state = State.RUNNING
ti2.state = State.QUEUED
session = settings.Session
session.add(pool)
session.add(ti1)
session.add(ti2)
session.commit()
session.close()
assert float('inf') == pool.open_slots() # pylint: disable=no-value-for-parameter
assert 1 == pool.running_slots() # pylint: disable=no-value-for-parameter
assert 1 == pool.queued_slots() # pylint: disable=no-value-for-parameter
assert 2 == pool.occupied_slots() # pylint: disable=no-value-for-parameter
assert {
"default_pool": {
"open": 128,
"queued": 0,
"total": 128,
"running": 0,
},
"test_pool": {
"open": float('inf'),
"queued": 1,
"running": 1,
"total": float('inf'),
},
} == pool.slots_stats()
def test_default_pool_open_slots(self):
set_default_pool_slots(5)
assert 5 == Pool.get_default_pool().open_slots()
dag = DAG(
dag_id='test_default_pool_open_slots',
start_date=DEFAULT_DATE,
)
op1 = DummyOperator(task_id='dummy1', dag=dag)
op2 = DummyOperator(task_id='dummy2', dag=dag, pool_slots=2)
ti1 = TI(task=op1, execution_date=DEFAULT_DATE)
ti2 = TI(task=op2, execution_date=DEFAULT_DATE)
ti1.state = State.RUNNING
ti2.state = State.QUEUED
session = settings.Session
session.add(ti1)
session.add(ti2)
session.commit()
session.close()
assert 2 == Pool.get_default_pool().open_slots()
assert {
"default_pool": {
"open": 2,
"queued": 2,
"total": 5,
"running": 1,
}
} == Pool.slots_stats()