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:Win
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()
Python
自定义
主从分布式
架构