fix: add commit and change dir

Author: wescai

README.md

@@ -9,10 +9,22 @@ Tencent component monitor.
 
 ## Usage
 
+如果组件需要支持自定义监控数据上报，需在 component 的\_shims 下安装 tencent-component-monitor
+
 ```bash
 $ npm install tencent-component-monitor --save
 ```
 
+并在 handler.js 文件里面，在所有引用的最前面引入 monitor
+
+```
+require('tencent-component-monitor')
+const fs = require('fs')
+const path = require('path')
+const { createServer, proxy } = require('tencent-serverless-http')
+
+```
+
 ## License
 
 MIT License

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tencent-component-monitor",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "description": "Tencent component monitor",
   "main": "src/index.js",
   "scripts": {
@@ -36,7 +36,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/serverless-tencent/tencent-component-toolkit.git"
+    "url": "git+https://github.com/serverless-tencent/tencent-component-monitor.git"
   },
   "keywords": [
     "template",
@@ -46,9 +46,9 @@
   "author": "Tencent Cloud Inc.",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/serverless-tencent/tencent-component-toolkit/issues"
+    "url": "https://github.com/serverless-tencent/tencent-component-monitor/issues"
   },
-  "homepage": "https://github.com/serverless-tencent/tencent-component-toolkit#readme",
+  "homepage": "https://github.com/serverless-tencent/tencent-component-monitor#readme",
   "devDependencies": {
     "@commitlint/cli": "^8.3.5",
     "@commitlint/config-conventional": "^8.3.4",

src/agent.js

@@ -0,0 +1,5 @@
+const { EventEmitter } = require('events')
+
+class Agent extends EventEmitter {}
+
+module.exports = Agent

src/monitor/constants.js renamed to src/constants.js

@@ -1,5 +1,12 @@
-const Monitor = require('./monitor')
+const shimmer = require('./shimmer')
+const Agent = require('./agent')
 
-module.exports = {
-  Monitor
+function initialize() {
+  const agent = new Agent()
+  // 封装 module的_load方法，在load时针对基础组件附加探针
+  shimmer.patchModule()
+  // 初始化一系列基础组件
+  shimmer.bootstrapInstrumentation(agent)
 }
+
+initialize()

src/index.js

@@ -18,17 +18,19 @@ module.exports = function initialize(agent, express) {
     return false
   }
 
-  // wrapExpress4(express)
   utils.wrapMethod(express.Router, 'route', function wrapRoute(fn) {
     if (!utils.isFunction(fn)) {
       return fn
     }
 
     return function wrappedRoute() {
       const sourceRoute = fn.apply(this, arguments)
-      // Express should create a new route and layer every time Router#route is
-      // called, but just to be on the safe side, make sure we haven't wrapped
-      // this already.
+      // Router每次添加一个route，都会把route包装到layer中，并且将layer添加到的stack中
+      // 当客户端发送一个http请求后，会先进入express实例对象对应的router.handle函数中，
+      // router.handle函数会通过next()遍历stack中的每一个layer进行match，
+      // 如果match返回true，则获取layer.route，执行route.dispatch函数，
+      // route.dispatch同样是通过next()遍历stack中的每一个layer，
+      // 然后执行layer.handle_request，也就是调用中间件函数。直到所有的中间件函数被执行完毕，整个路由处理结束
       if (!utils.isWrapped(sourceRoute, 'get')) {
         wrapRouteMethods(sourceRoute)
 

src/monitor/instrumentation/express.js renamed to src/instrumentation/express.js

@@ -8,7 +8,7 @@ module.exports = function initialize(agent, httpProxy) {
       context[REUQEST_START_KEY] = Date.now()
       const proxy = fn.apply(this, arguments)
       return new Promise(function(resolve) {
-        agent.on('responseFinish', function(ctx, method, path, responseCode) {
+        agent.once('responseFinish', function(ctx, method, path, responseCode) {
           if (ctx) {
             report.reportHttp(ctx, method, path, responseCode).then(
               function() {