Posted in Python onSeptember 19, 2016
本文实例讲述了Python自定义主从分布式架构。分享给大家供大家参考,具体如下:
环境:Win7 x64,Python 2.7,APScheduler 2.1.2。
原理图如下:
代码部分:
(1)、中心节点:
#encoding=utf-8 #author: walker #date: 2014-12-03 #function: 中心节点(主要功能是分配任务) import SocketServer, socket, Queue CenterIP = '127.0.0.1' #中心节点IP CenterListenPort = 9999 #中心节点监听端口 CenterClient = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) #中心节点用于发送网络消息的socket TaskQueue = Queue.Queue() #任务队列 #获取任务队列 def GetTaskQueue(): for i in range(1, 11): TaskQueue.put(str(i)) #CenterServer的回调函数,在接受到udp报文是触发 class MyUDPHandler(SocketServer.BaseRequestHandler): def handle(self): data = self.request[0].strip() socket = self.request[1] print(data) if data.startswith('wait'): vec = data.split(':') if len(vec) != 3: print('Error: len(vec) != 3') else: nodeIP = vec[1] nodeListenPort = vec[2] nodeID = nodeIP + ':' + nodeListenPort if not TaskQueue.empty(): task = TaskQueue.get() print('send task ' + task + ' to ' + nodeID) CenterClient.sendto('task:' + task, (nodeIP, int(nodeListenPort))) else: print('TaskQueue is empty!') GetTaskQueue() #获取任务队列 CenterServer = SocketServer.UDPServer((CenterIP, CenterListenPort), MyUDPHandler) print('Listen port ' + str(CenterListenPort) + ' ...') CenterServer.serve_forever()
(2)、任务节点:
#encoding=utf-8 #author: walker #date: 2014-12-03 #function: 任务节点(请求/接收/执行任务) import time, socket, SocketServer from apscheduler.scheduler import Scheduler CenterIP = '127.0.0.1' #中心节点IP CenterListenPort = 9999 #中心节点监听端口 NodeIP = socket.gethostbyname(socket.gethostname()) #任务节点自身IP NodeClient = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) #任务节点用于发送网络消息的socket #任务:发送网络信息 def jobSendNetMsg(): msg = '' if NodeServer.TaskState == 'wait': msg = 'wait:' + NodeIP + ':' + str(NodeListenPort) elif NodeServer.TaskState == 'exec': msg = 'exec:' + NodeIP + ':' + str(NodeListenPort) print(msg) NodeClient.sendto(msg, (CenterIP, CenterListenPort)) #添加并启动定时任务 def InitTimer(): sched = Scheduler() sched.add_interval_job(jobSendNetMsg, seconds=1) sched.start() #执行任务 def ExecTask(task): print('ExecTask ' + task + ' ...') time.sleep(2) print('ExecTask ' + task + ' over') #NodeServer的回调函数,在接受到udp报文是触发 class MyUDPHandler(SocketServer.BaseRequestHandler): def handle(self): data = self.request[0].strip() socket = self.request[1] print('recv data: ' + data) if data.startswith('task'): vec = data.split(':') if len(vec) != 2: print('Error: len(vec) != 2') else: task = vec[1] self.server.TaskState = 'exec' ExecTask(task) self.server.TaskState = 'wait' InitTimer() NodeServer = SocketServer.UDPServer(('', 0), MyUDPHandler) NodeServer.TaskState = 'wait' #(exec/wait) NodeListenPort = NodeServer.server_address[1] print('NodeListenPort:' + str(NodeListenPort)) NodeServer.serve_forever()
希望本文所述对大家Python程序设计有所帮助。
Python自定义主从分布式架构实例分析
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