需求

• 一个后台Java程序启动时，可以在配置文件中配置线程数量。需要获取线程数量和线程名进行校验。

思路

1. 读取配置文件，获得配置的线程数量。
2. 获取该java程序的进程pid
3. 通过jstack 获取该进程的线程详情并重定向至文件
4. python 读取该文件并进行分析

实现

该java程序会将pid写入一个文件中，所以直接读取该文件获得pid即可。此处将上述的2、3使用shell脚本实现。

#! /bin/bash
pid=`cat tpid`
jstack $pid >> ./$pid.txt

python 读取该文件并进行分析

# -*- coding: utf-8 -*-
import re
import json
import subprocess
import sys
reload(sys)
sys.setdefaultencoding('utf8')

def get_real_threads_name_list(jstack_file):         #从jstack log中获取实际的线程数及线程名
    log_file = open(jstack_file, 'r')
    pattern = re.compile('"(.*)"')
    real_threads_name_list = pattern.findall(log_file.read())
    log_file.close()
    print json.dumps(real_threads_name_list, encoding='utf-8', ensure_ascii=False)
    return real_threads_name_list

def is_chinese(param_list):       #判断是否中文
    real_threads_num = 0
    for i in param_list:
        if u'\u4e00' <= i <= u'\u9fff':
            real_threads_num += 1
    return real_threads_num


def get_application_threads_num(file_path):      #从配置文件读取配置的线程数量
    application_yaml = open(file_path)
    application_threads_num = 0
    application = yaml.load(application_yaml)
    if application['frms.etl.pay']['enable']:
        application_threads_num += application['frms.etl.pay']['threadSize']
    if application['frms.pay.auditobj']['enable']:
        application_threads_num += application['frms.pay.auditobj']['threadsize']
    if application['frms.pay.ds']['enable']:
        application_threads_num += application['frms.pay.ds']['threadsize']
    if application['frms.pay']['streamcube.publish.enable']:
        application_threads_num += application['frms.pay']['dsobj']['threadsize']
    if application['frms']['pay.etl']['cloud.call']:
        application_threads_num += application['frms']['etl.data.service']['threadSize']
    application_threads_num += application['frms.etl.scheduled.threadSize']
    application_yaml.close()
    return application_threads_num


def compare(a, b):     #比较
    if a == b:
        print 'ok'
    else:
        print 'not ok'


if __name__ == '__main__':
    subprocess.call('pid_log.sh', shell=True)         #调用shell脚本
    real_threads_nums = is_chinese(get_real_threads_name_list('H:\\scripts\\jstack19666.txt'))
    application_threads_nums = get_application_threads_num(
        'application(1).yml')
    compare(real_threads_nums, application_threads_nums)

新需求
通过jstack远程连接服务器
还没实现