def test_ti_not_running(self):
"""
Non-running task instances should pass this dep
"""
ti = FakeTI(state=State.NONE, start_date=datetime(2016, 1, 1))
self.assertTrue(NotRunningDep().is_met(ti=ti, dep_context=None))
def test_ti_running(self):
"""
Running task instances should fail this dep
"""
ti = FakeTI(state=State.RUNNING, start_date=datetime(2016, 1, 1))
self.assertFalse(NotRunningDep().is_met(ti=ti, dep_context=None))
# In order to be able to get queued a task must have one of these states
QUEUEABLE_STATES = {
State.FAILED,
State.NONE,
State.QUEUED,
State.SCHEDULED,
State.SKIPPED,
State.UPSTREAM_FAILED,
State.UP_FOR_RETRY,
State.UP_FOR_RESCHEDULE,
}
# Context to get the dependencies that need to be met in order for a task instance to
# be backfilled.
QUEUE_DEPS = {
NotRunningDep(),
NotSkippedDep(),
RunnableExecDateDep(),
ValidStateDep(QUEUEABLE_STATES),
}
# Dependencies that need to be met for a given task instance to be able to get run by an
# executor. This class just extends QueueContext by adding dependencies for resources.
RUN_DEPS = QUEUE_DEPS | {
DagTISlotsAvailableDep(),
TaskConcurrencyDep(),
}
# TODO(aoen): SCHEDULER_DEPS is not coupled to actual execution in any way and
# could easily be modified or removed from the scheduler causing this dependency to become
# outdated and incorrect. This coupling should be created (e.g. via a dag_deps analog of
# In order to be able to get queued a task must have one of these states
QUEUEABLE_STATES = {
State.FAILED,
State.NONE,
State.QUEUED,
State.SCHEDULED,
State.SKIPPED,
State.UPSTREAM_FAILED,
State.UP_FOR_RETRY,
}
# Context to get the dependencies that need to be met in order for a task instance to
# be backfilled.
QUEUE_DEPS = {
NotRunningDep(), # 任务实例没有运行
NotSkippedDep(), # 任务实例没有被标记为跳过
RunnableExecDateDep(), # 判断任务执行时间 必须小于等于当前时间 且 小于等于结束时间
ValidStateDep(QUEUEABLE_STATES), # 验证任务的状态必须在队列状态中
}
# Dependencies that need to be met for a given task instance to be able to get run by an
# executor. This class just extends QueueContext by adding dependencies for resources.
RUN_DEPS = QUEUE_DEPS | {
DagTISlotsAvailableDep(), # 每个dag能并发执行的最大任务数依赖
TaskConcurrencyDep(), # 每个任务的任务实例有最大限制
}
# TODO(aoen): SCHEDULER_DEPS is not coupled to actual execution in any way and
# could easily be modified or removed from the scheduler causing this dependency to become
# outdated and incorrect. This coupling should be created (e.g. via a dag_deps analog of
