# The MIT License (MIT) # Copyright (c) 2014-2017 University of Bristol
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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from mongoengine import Document, StringField, EmbeddedDocumentListField, DateTimeField
from time_interval import TimeIntervalModel
from node import NodeDefinitionModel
from factor import FactorDefinitionModel
[docs]class WorkflowDefinitionModel(Document):
workflow_id = StringField(required=True, min_length=1, max_length=512)
name = StringField(required=True, min_length=1, max_length=512)
description = StringField(required=True, min_length=1, max_length=4096)
nodes = EmbeddedDocumentListField(document_type=NodeDefinitionModel, required=False)
factors = EmbeddedDocumentListField(document_type=FactorDefinitionModel, required=True)
owner = StringField(required=False, min_length=1, max_length=512)
meta = {
'collection': 'workflow_definitions',
'indexes': [{'fields': ['workflow_id']}],
'ordering': ['workflow_id']
}
[docs]class WorkflowStatusModel(Document):
stream_id = StringField(required=True, min_length=1, max_length=512)
last_updated = DateTimeField(required=True)
last_accessed = DateTimeField(required=False)
# Time ranges requested for computation for this workflow
requested_intervals = EmbeddedDocumentListField(document_type=TimeIntervalModel, required=True)
# Actual ranges that have been computed. Note that this can be empty to begin with
calculated_intervals = EmbeddedDocumentListField(document_type=TimeIntervalModel, required=False)
meta = {
'collection': 'workflow_status',
'indexes': [{'fields': ['stream_id']}],
'ordering': ['start']
}
[docs] def add_time_interval(self, time_interval):
if not isinstance(time_interval, TimeIntervalModel):
raise RuntimeError("Can only add TimeIntervalModel objects")
self.calculated_intervals.append(time_interval)
self.update_time_intervals()
return self.calculated_intervals
[docs] def update_time_intervals(self):
sorted_by_lower_bound = sorted(self.calculated_intervals, key=lambda r: r.start)
merged = []
for higher in sorted_by_lower_bound:
if not merged:
merged.append(higher)
else:
lower = merged[-1]
# test for intersection between lower and higher:
# we know via sorting that lower.start <= higher.start
if higher.start <= lower.end:
upper_bound = max(lower.end, higher.end)
merged[-1] = TimeIntervalModel(start=lower.start, end=upper_bound) # replace by merged interval
else:
merged.append(higher)
self.calculated_intervals = merged