Task.py

'''
Created on Jan 9, 2015

@author: niuzhaojie
'''
from SchedulableStatus import SchedulableStatus

import abc

class Task(object):
    __metaclass__ = abc.ABCMeta
    
    
    def __init__(self, taskID, priority, resource):
        '''
        Constructor
        '''
        self._taskID = taskID
        self._priority = priority
        self._resource = resource
        self._status = SchedulableStatus.WAITING
        self._childs = []
        self._parents = []
        self._expectedNode = None
        self._scheduledNode = None
        
        
    def getTaskID(self):
        return self._taskID
        
        
    def nodeAllocate(self, node):
        self._scheduledNode = node
        
        
    def addChild(self, child):
        self._childs.append(child)
        child._parents.append(self)
        
        
    def getParents(self):
        return self._parents
        
        
    def updateStatus(self, status):
        self._status = status
        
        
    def getStatus(self):
        return self._status
        
        
    def getResource(self):
        return self._resource
    
    
    def getPriority(self):
        return self._priority
        
    
    def getExpectedNode(self):
        return self._expectedNode
    
    
    def getAllocatedNode(self):
        return self._scheduledNode
    
    
    @abc.abstractmethod
    def getWorkload(self):
        return
    
    
    def parentsAllFinished(self):
        ret = True
        
        for parent in self._parents:
            if parent.getStatus() != SchedulableStatus.FINISHING:
                ret = False
                
        return ret
    
    
    @abc.abstractmethod
    def schedule(self, t):
        return