/
builder.py
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/
builder.py
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# -*-coding:utf-8-*-
__all__ = ["QueryBuilder"]
import arrow
from etl_utils import cached_property
from copy import deepcopy
from ...luigi_extensions import ArrowParameter
from ..graph import Graph
from ..utils import stringify, Template, TaskStorageSet
from .params import Params
from .create_task import CreateTask
class QueryBuilder(object):
"""
Construct a query builder.
All propertyies are generated lazily by using `cached_property`, as in a **DAG**.
"""
def __init__(self, ptm, raw_params):
assert isinstance(raw_params, dict), raw_params
self.raw_params = raw_params
self.ptm = ptm
@cached_property
def date_begin(self):
return self.ptm.current_luiti_visualiser_env["date_begin"]
@cached_property
def date_end(self):
date_end = self.ptm.current_luiti_visualiser_env.get("date_end", self.yesterday_str)
self.ptm.current_luiti_visualiser_env["date_end"] = date_end
return date_end
@staticmethod
def yesterday():
return ArrowParameter.now().replace(days=-1).floor("day")
@cached_property
def yesterday_str(self):
return QueryBuilder.yesterday().format("YYYY-MM-DD")
@cached_property
def accepted_params(self):
"""
Comes from current luiti that selected.
"""
return self.ptm.current_luiti_visualiser_env["additional_task_parameters"]
@cached_property
def accepted_query_params(self):
"""
provide to visualSearch.js, used for autocomplete.
user query via URL search.
autocomplete params key/value.
"""
# date range related.
days_range = arrow.Arrow.range("day",
ArrowParameter.get(self.date_begin),
ArrowParameter.get(self.date_end))
accepted_date_values = sorted(map(str, days_range))
# result
return {
"date_value": accepted_date_values,
"task_cls": self.ptm.task_class_names,
"luiti_package": self.ptm.task_package_names,
}
@cached_property
def default_query(self):
""" Query provide by user config. """
# assign default params
default_query = {
"date_value": str(QueryBuilder.yesterday()),
# to insert more key-value
}
# get config from current package's luiti_visualiser_env
for task_param, task_param_opt in self.accepted_params.iteritems():
self.accepted_query_params[task_param] = task_param_opt["values"]
default_query[task_param] = task_param_opt["default"]
return default_query
@cached_property
def selected_query(self):
selected_query = {k1: v1 for k1, v1 in self.raw_params.iteritems() if k1 in self.accepted_params or k1 == "date_value"}
selected_query["luiti_package"] = self.selected_packages
selected_query = dict(self.default_query.items() + selected_query.items())
return selected_query
@cached_property
def default_packages(self):
""" user provided. """
return self.ptm.current_luiti_visualiser_env["package_config"].get("defaults", [])
@cached_property
def selected_packages(self):
result = self.raw_params.get("luiti_package", self.default_packages)
result = result or self.ptm.task_package_names
return result
@cached_property
def selected_task_cls_names(self):
"""
current selected.
"""
result = set(self.raw_params.get("task_cls", []))
# modify other cached_property
self.selected_query["task_cls"] = list(result)
return result
@cached_property
def total_task_instances(self):
"""
Total task instances.
"""
# 1. build possible params.
# **remove** luiti_package and task_cls query str
params_array = Params.build_params_array(self.default_query, self.selected_query)
# 2. and generate task instances.
total_task_instances = list()
for ti in self.ptm.task_classes:
# TODO why below two lines exist before.
# if ti.__name__ not in self.selected_task_cls_names:
# continue
for _params in params_array:
task_instance = CreateTask.new(ti, _params)
total_task_instances.append(task_instance)
result = sorted(list(set(total_task_instances)))
return result
@cached_property
def selected_task_instances(self):
""" nodes that drawed in vis.js """
# filter by package
result = sorted(list(set(self.total_task_instances)))
result = filter(lambda ti: ti.package_name in self.selected_packages,
result)
# To avoid only self is in the graph.
# If select task class, then to find linked task instances.
if not self.selected_task_cls_names:
return result
pure_selected_task_instances = [ti for ti in result if ti.task_clsname in self.selected_task_cls_names]
pure_linked = TaskStorageSet()
for ti in pure_selected_task_instances:
for t2 in self.graph_infos_python["requires"]["direct"][ti]:
pure_linked.add(t2)
for t2 in self.graph_infos_python["upons"]["direct"][ti]:
pure_linked.add(t2)
# filter that tasks are linked, in current task_classes.
result = [ti for ti in result if ti in pure_linked]
result.extend(pure_selected_task_instances)
result = list(set(result))
return result
@cached_property
def graph_infos_data(self):
return Graph.analysis_dependencies_between_nodes(self.total_task_instances,
self.selected_packages)
@cached_property
def graph_infos_python(self):
return self.graph_infos_data["python"]
@cached_property
def nodes(self):
return [Template.a_node(ti) for ti in self.selected_task_instances]
@cached_property
def edges(self):
return Template.edges_from_nodes(self.selected_task_instances)
@cached_property
def nodes_groups(self):
return Graph.split_edges_into_groups(self.edges,
self.nodes,
self.selected_task_instances)
@cached_property
def nodes_groups_in_view(self):
return [sorted(list(nodes_set)) for nodes_set in self.nodes_groups]
@cached_property
def task_instance_repr_to_info(self):
result = dict()
for ti in self.total_task_instances:
param_kwargs = deepcopy(ti.param_kwargs)
if "pool" in param_kwargs:
del param_kwargs["pool"]
result[str(ti)] = {"task_cls": ti.task_clsname, "param_kwargs": stringify(param_kwargs)}
return result
@cached_property
def result(self):
return {
"title": "Luiti WebUI, a DAG timely visualiser.",
"queryparams": {
"accepted": self.accepted_query_params,
"selected_query": self.selected_query,
"default_query": self.default_query,
"luiti_visualiser_env": self.ptm.current_luiti_visualiser_env,
},
"ptm": {
"task_class_names": self.ptm.task_class_names,
"task_package_names": self.ptm.task_package_names,
"task_clsname_to_package_name": self.ptm.task_clsname_to_package_name,
"package_to_task_clsnames": self.ptm.package_to_task_clsnames,
"task_instance_repr_to_info": self.task_instance_repr_to_info,
},
"nodeedge": {
"nodes": self.nodes,
"edges": self.edges,
"nodes_groups": self.nodes_groups_in_view,
"graph_infos": self.graph_infos_data["json"],
},
"errors": {
"load_tasks": self.ptm.load_all_tasks_result["failure"],
}
}