#web

阅读 Sniper 源码实现,学习 Golang 中重载机制的实现

Published at August 31, 2019 ·  1 min read

Sniper 是 Bilibili 开源的一款轻量级业务框架,通过阅读其代码,可以学习到很多优秀的设计理念,这里学习的主要是其中 cmd/server/main.go 中关于停止、重载的设计,首先利用 viper.OnConfigChange 函数监听配置文件,发生更改后,则向 reload channel 发送消息,通过 signal.Notify(stop, syscall.SIGTERM, syscall.SIGINT, syscall.SIGHUP) 监听 syscall.SIGTERM, syscall.SIGINT, syscall.SIGHUP 三个信号,并将其发送给 stop channel。其后在 for loop 循环中,通过 select case 获取两个channel 中的消息,进行相应的重制、停止等操作。 func main() { reload := make(chan int, 1) stop := make(chan os.Signal, 1) conf.OnConfigChange(func() { reload <- 1 }) conf.WatchConfig() signal.Notify(stop, syscall.SIGTERM, syscall.SIGINT, syscall.SIGHUP) startServer() for { select { case <-reload: util.Reset() case sg := <-stop: stopServer() // 仿 nginx 使用 HUP 信号重载配置 if sg == syscall....


Tags

abcs accept acid activemq affinity algorithm allocation android array async aws b+tree b-tree backoff benchmark best-practices bfs big-o bigquery bind bitcount blog break broker bubble buffer cache cap cert cgroups channel citus class classmethod cluster concurrency config consumer container cookie cors crawler cronjob csrf ctr data-science data-structure database datadog dataflow datascience decorator defer dfs distributed django dns docker double-shipping drf ecosia elastic-search enumerate epoll extra fabric2 facebook-pixel financial-report flask flutter forward-proxy freelance frontend frp garbage-collector gc gcp generator get gil git golang goroutine graphql ha handbook haproxy hash hash-slot hashring hashtable hpa http http-auth http-proxy http_proxy https index init innodb instagram intergration interview ios javascript jinja2 jobboard jwt k8s kafka kibana kqueue label lambda layer4 layer7 lean levels.io linked-list linux list listen loadbalancer logs long-tail lru marketing master matplotlib memory merge metaclass metaprogramming metrics metrics-server microservices mitm model mq myisam mysql namespace nat netflix network-extension nginx nodejs nomad nosql npm oodesign openssl optimization orm pandas parallelism paramiko parkinglot patroni permission pg pipeline pixelme post postgresql postresql prefetch_related prerender private-key process proxy proxycommand put pvm python queue rabbitmq rbac react-native reactjs rebase redis redis-cluster replication resource rest restfulapi retargeting retry revenue reverse-proxy rocketmq rsa saas scaleable search-engine security select seo serverless service session set shadosocks shadowsocks shard sharding shell shopify sigint signal sigterm slack slave slow-query sniper sns socket socks5 source-code spa sql sqlalchemy sqs ssh ssl ssl-pinning stack startup state stateful stateless staticmethod string struct swift switch syscall system-design systemctl tcp tcp-proxy thread tmpreaper token traefik trustkit tunning type typeform udp variable vc vpn vuejs web web-development where yarn zset 削峰 宽索引 异步 窄索引 解耦 跨域 跳板机


Archives

2019 (141)