caoxudong

package demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.actuate.autoconfigure.endpoint.web.CorsEndpointProperties;
import org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointProperties;
import org.springframework.boot.actuate.autoconfigure.endpoint.web.servlet.WebMvcEndpointManagementContextConfiguration;
import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
import org.springframework.boot.actuate.endpoint.web.WebEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointsSupplier;

caoxudong

package com.example.demo.lambda;

import java.io.PrintStream;
import java.util.function.Consumer;

public class LambdaDemo {

    public static void main(String[] args) {
        Consumer<Integer> c1 = s -> System.out.println(s);
        Consumer<Integer> c2 = System.out::println;

caoxudong

create a user for yapi, e.g.:

$ python3 create_user.py --mongo_host localhost --mongo_port 27017 --username haha --useremail haha@163.com
INFO: generate default password: Uck33M42Za
INFO: create user successfully, id=29

note:

• install python lib pymongo

caoxudong

#!/usr/bin/env python3
"""
Very simple HTTP server in python for logging requests
Usage::
    ./server.py [<port>]
"""
from http.server import BaseHTTPRequestHandler, HTTPServer
import logging

class S(BaseHTTPRequestHandler):

caoxudong

线上常用脚本

删除大小为0的文件

find . -name "*" -type f -size 0c | xargs -n 1 rm -f

swap使用量top10

for file in /proc/*/status ; do awk '/VmSwap|^Pid/{printf $2 " " $3}END{ print ""}' $file; done | awk -F ' ' 'BEGIN { jpsOutputFile="/tmp/caoxudong.stat.swap.txt"; jpsCmd="jps >"jpsOutputFile; system(jpsCmd); while (getline line < jpsOutputFile) {split(line, idname, " "); apps[idname[1]]=idname[2];}}    {split($0, idcountunit, " "); result[idcountunit[1]]=apps[idcountunit[1]]" "idcountunit[2]" "idcountunit[3];}    END{for(id in result){print id, result[id]}}' | sort -k 3 -n -r | head

caoxudong

package test;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Method;

public class MethodHandleTest {

    public static void main(String[] args) throws Throwable {

caoxudong

package test.data;

import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import java.text.SimpleDateFormat;

public class ComputeSummerTime {

    /**

caoxudong

ps -eLf | tail -n +2 | awk -F ' ' '{threads_count[$2]++;} END{for(pid in threads_count){print pid,threads_count[pid];}}' | sort -k2 -n -r | head

caoxudong

for file in /proc/*/status ; do awk '/VmSwap|^Pid/{printf $2 " " $3}END{ print ""}' $file; done | sort -k 2 -n -r | head

caoxudong

# Start the old vagrant
$ vagrant init centos-6.3
$ vagrant up

# You should see a message like:
#  [default] The guest additions on this VM do not match the install version of
#  VirtualBox! This may cause things such as forwarded ports, shared
#  folders, and more to not work properly. If any of those things fail on
#  this machine, please update the guest additions and repackage the
#  box.