ggzeng’s gists

ggzeng / kong_plugin_handler.lua

Last active January 11, 2020 12:46

kong插件中handler.lua模板 kong v1.4.x https://docs.konghq.com/1.4.x/plugin-development/custom-logic/

	-- handler.lua
	local BasePlugin = require "kong.plugins.base_plugin"

	local kong = kong

	local CustomHandler = BasePlugin:extend()

	CustomHandler.VERSION = "1.0.0"
	CustomHandler.PRIORITY = 10

ggzeng / kong_pdk_tbl_cache.lua

Created January 11, 2020 09:16

kong 和table相关pdk的cache操作 kong: 1.4.x



	-- ----------------------------
	-- 下面cache的key为PK或者uniq字段
	-- ----------------------------
	-- 查表从数据库中取出
	local function load_{tablename}_by_{filedname}(var_filedname)
	local row, err = kong.db.{tablename}:select_by_{filedname}(var_filedname) -- 3. cache中没有时从db中获取数据
	if err then
	return nil, err

ggzeng / go_pipline_demo.go

Last active December 31, 2019 10:10

https://gist.github.com/claudiofahey/3afcf4f4fb3d8d3b35cadb100d4fb9b7 https://blog.golang.org/pipelines 基本思想： 1. pipeline中各stage的组合通过自定义函数实现 2. 每个stage中都通过go routine并行处理，处理结果与处理过程中的错误都通过channel返回 3. 每个stage都会传入ctx和输入channel 4. 下一个stage使用上一个stage的输出c

	//
	// Companion code to https://medium.com/statuscode/pipeline-patterns-in-go-a37bb3a7e61d
	//
	// To run:
	// go get github.com/pkg/errors
	// go run -race pipeline_demo.go
	//
	package main

	import (

ggzeng / gist:244340c0a53720c13a70b38046b7b19e

Last active April 21, 2021 06:46

git config --global commit.template ~/.git-commit-template.txt

We couldn’t find that file to show.

ggzeng / caputre_sys_signal.go

Created November 21, 2019 11:51

捕获并处理系统的signal

	package main

	import (
	"fmt"
	"os"
	"os/signal"
	"syscall"
	)

	func main() {

ggzeng / cmd_exec_in_output.go

Created November 21, 2019 10:18

golang调用外部命令

	package main

	import (
	"fmt"
	"io/ioutil"
	"os/exec"
	)

	func main() {

ggzeng / ratelimit.go

Created November 21, 2019 04:00

golang 限速的实现方式

	package main

	import (
	"fmt"
	"time"
	)

	func main() {

	requests := make(chan int, 5)

ggzeng / multi_producer_single_consumer.go

Last active November 20, 2019 13:09

一些生成和消费者模式

	package main
	// 多生成，多消费者；注意下面的注意事项
	// https://www.toutiao.com/a6506067818100818445/

	import (
	"fmt"
	"math/rand"
	"sync"
	"time"
	)

ggzeng / gracefull_exit.go

Last active December 17, 2021 17:10

golang优雅退出的方法 Channel关闭原则：不要在消费端关闭channel，不要在有多个并行的生产者时对channel执行关闭操作。 https://github.com/Shitaibin/golang_goroutine_exit https://www.toutiao.com/a6506067818100818445/

	// 一个循环里只从一个工作channel里读数据
	go func(in <-chan int) {
	for x := range in { // 当channel "in"被关闭时会结束循环
	fmt.Printf("Process %d\n", x)
	}
	}(inCh)


	// 一个循环里需要从一个工作channel里读数据，同时还需响应控制channel
	go func() {

ggzeng / protobuf_grpc_greeter_client.go

Last active May 29, 2020 07:45

protocol buffer grpc examples

	// Package main implements a client for Greeter service.
	package main

	import (
	"context"
	"log"
	"os"
	"time"

	"google.golang.org/grpc"

Gavin Zeng ggzeng