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##############################################################################
# Copyright (c) 2018 Huawei Technologies Co.,Ltd. and others
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import random
import collections
import re
from src.conductor_processor.task import TaskFile
class WorkflowFile(object):
def __init__(self, name):
self._name = "workflow_" + name + "(%s)" % getRandString(10)
self._description = ''
self._version = 1
self._schemaVersion = 2
self._tasks = []
self._outputParameters = {}
def getDict(self):
d = collections.OrderedDict()
d['name'] = self._name
d['description'] = self._description
d['version'] = self._version
d['schemaVersion'] = self._schemaVersion
d['tasks'] = self._tasks
d['outputParameters'] = self._outputParameters
return d
def generateMetaData(self, flowList, stepObjArr):
flowParser = FlowParser(flowList, stepObjArr)
self._tasks, taskMetaList = flowParser.parseMainFlow()
normalTasks = flowParser.getNormalTaskList()
for normalTask in normalTasks:
taskName = normalTask['name']
referenceName = normalTask['taskReferenceName']
self._outputParameters["%s(%s)" % (taskName, referenceName)] = \
"${%s.output.response.body}" % referenceName
return self.getDict(), taskMetaList
class FlowParser(object):
def __init__(self, flowList, stepObjArr):
self._mainFlow = {}
self._subFlowDict = {}
self._stepObjArr = stepObjArr
self._normalTasks = []
for flow in flowList:
if flow['name'] == "main":
self._mainFlow = flow
else:
self._subFlowDict[flow['name']] = flow
def parseMainFlow(self):
return self.parseOrderList(self._mainFlow['orders'], self._stepObjArr)
def parse(self, obj, stepObjArr):
if isinstance(obj, str):
return self.parseFlow(obj, stepObjArr)
else:
return self.parseOrderList(obj, stepObjArr)
def parseFlow(self, flowName, stepObjArr):
orderList = self._subFlowDict[flowName]['orders']
return self.parseOrderList(orderList, stepObjArr)
def parseOrderList(self, orderList, stepObjArr):
tasks = []
taskMetaAllList = []
for order in orderList:
if order['type'] == "normal":
genTask = NormalTask(order, stepObjArr, self)
self._normalTasks.append(genTask)
elif order['type'] == "switch":
genTask = SwitchTask(order, stepObjArr, self)
elif order['type'] == "parallel":
genTask = ParallelTask(order, stepObjArr, self)
tasks.append(genTask.getDict())
if order['type'] == "parallel":
joinTask = genTask.getJoinTask()
tasks.append(joinTask.getDict())
taskMetaList = genTask.getTaskMetaList()
if taskMetaList is not None:
taskMetaAllList.extend(taskMetaList)
return tasks, taskMetaAllList
def getNormalTaskList(self):
normalTasksDict = []
for normalTask in self._normalTasks:
normalTasksDict.append(normalTask.getDict())
return normalTasksDict
def getNormalTask(self, stepId):
for normalTask in self._normalTasks:
if normalTask.getStepId() == stepId:
return normalTask
return None
class BaseWorkflowTask(object):
def __init__(self, name):
self._name = name
self._taskReferenceName = self._name + "_task_%s" % getRandString(10)
self._type = ''
self._args = {}
def __str__(self):
dictObj = self.getDict()
return str(dictObj)
def getDict(self):
d1 = {
"name": self._name,
"taskReferenceName": self._taskReferenceName,
"type": self._type
}
return dict(d1, **self._args)
def getName(self):
return self._name
def getReferenceName(self):
return self._taskReferenceName
def getTaskMetaList(self):
taskFile = TaskFile()
return [taskFile.generateFromStep(self)]
class NormalTask(BaseWorkflowTask):
def __init__(self, order, stepObjArr, flowParser):
relatedStepObj = stepObjArr[order['step'] - 1]
super(NormalTask, self).__init__(relatedStepObj.getName())
self._taskReferenceName = "task_%s" % getRandString(10)
self._stepId = relatedStepObj.getId()
self._type = "HTTP"
self._args['inputParameters'] = relatedStepObj.getArgs()
self._paramTransform(self._args['inputParameters'], flowParser)
print "NormalTask:----------------------\n", relatedStepObj.getArgs()
def _paramTransform(self, argsDict, flowParser):
for (k, v) in argsDict.items():
if isinstance(v, str):
if re.match("^\(\(\d+\..*\)\)", v):
v = v[2:-2]
stepId, outputParam = v.split(".")
stepId = int(stepId)
normalTask = flowParser.getNormalTask(stepId)
if normalTask is None:
continue
argsDict[k] = "${%s.output.response.body.%s}" % \
(normalTask.getReferenceName(), outputParam)
elif isinstance(v, dict):
self._paramTransform(v, flowParser)
def getStepId(self):
return self._stepId
class SwitchTask(BaseWorkflowTask):
seqNumber = 0
def __init__(self, order, stepObjArr, flowParser):
super(SwitchTask, self).__init__("switch_" + str(SwitchTask.seqNumber))
SwitchTask.seqNumber = SwitchTask.seqNumber + 1
if 'name' in order:
self._name = order['name']
self._type = "DECISION"
caseValueParam = 'value'
order['value'] = order['value'][2:-2]
stepId, outputParam = order['value'].split(".")
stepId = int(stepId)
normalTask = flowParser.getNormalTask(stepId)
caseValue = "${%s.output.response.body.%s}" % \
(normalTask.getReferenceName(), outputParam)
self._args['inputParameters'] = {caseValueParam: caseValue}
self._args['caseValueParam'] = caseValueParam
self._args['decisionCases'] = {}
self._childTaskMetaList = []
for case, caseOrders in order['cases'].items():
self._args['decisionCases'][case], taskMetaList = \
flowParser.parse(caseOrders, stepObjArr)
if taskMetaList is not None:
self._childTaskMetaList.extend(taskMetaList)
def getTaskMetaList(self):
selfTaskMetaList = super(SwitchTask, self).getTaskMetaList()
selfTaskMetaList.extend(self._childTaskMetaList)
return selfTaskMetaList
class ParallelTask(BaseWorkflowTask):
seqNumber = 0
def __init__(self, order, stepObjArr, flowParser):
InstSeqNumber = ParallelTask.seqNumber
super(ParallelTask, self).__init__("parallel_" + str(InstSeqNumber))
ParallelTask.seqNumber = ParallelTask.seqNumber + 1
if 'name' in order:
self._name = order['name']
self._type = "FORK_JOIN"
self._args['forkTasks'] = []
self._childTaskMetaList = []
lastTasksNameList = []
parallelList = order['parallel'].items()
parallelList.sort()
for key, orderList in parallelList:
print orderList
taskList, taskMetaList = flowParser.parse(orderList, stepObjArr)
self._args['forkTasks'].append(taskList)
lastTasksNameList.append(taskList[-1]['taskReferenceName'])
if taskMetaList is not None:
self._childTaskMetaList.extend(taskMetaList)
self._joinTaskObj = ParallelJoinTask(InstSeqNumber, lastTasksNameList)
def getTaskMetaList(self):
selfTaskMetaList = super(ParallelTask, self).getTaskMetaList()
selfTaskMetaList.extend(self._childTaskMetaList)
selfTaskMetaList.extend(self._joinTaskObj.getTaskMetaList())
return selfTaskMetaList
def getJoinTask(self):
return self._joinTaskObj
class ParallelJoinTask(BaseWorkflowTask):
def __init__(self, seqNumber, joinOnList):
super(ParallelJoinTask, self).__init__(
"paralleljoin_" + str(seqNumber))
self._type = "JOIN"
self._args['joinOn'] = joinOnList
def getRandString(length):
return "".join(random.choice(str("0123456789")) for i in range(length))
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