Node Agent System Metrics

.editorconfig

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+[*]
+indent_size = 2
+ij_any_spaces_within_braces = true
+ij_javascript_spaces_within_imports = true
+ij_typescript_spaces_within_imports = true
+ij_javascript_import_sort_members = true
+ij_typescript_import_sort_members = true
+max_line_length = 80
+ij_javascript_force_semicolon_style = true
+ij_typescript_force_semicolon_style = true

.eslintrc.js

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+module.exports = {
+  plugins: ['prettier'],
+  extends: ['eslint:recommended', 'plugin:prettier/recommended'],
+  parser: '@typescript-eslint/parser',
+  root: true,
+  rules: {
+    'no-console': 0,
+    'no-inner-declarations': 0,
+    'arrow-parens': ['error', 'always'],
+    semi: ['error', 'always'],
+  },
+  env: {
+    node: true,
+  },
+  overrides: [
+    {
+      files: ['*.ts'],
+      extends: ['plugin:@typescript-eslint/recommended'],
+      rules: {
+        '@typescript-eslint/no-non-null-assertion': 0,
+        '@typescript-eslint/no-explicit-any': 0,
+        '@typescript-eslint/no-empty-interface': 0,
+        '@typescript-eslint/explicit-module-boundary-types': 0,
+        '@typescript-eslint/no-unused-vars': 0,
+        '@typescript-eslint/no-this-alias': 0,
+        '@typescript-eslint/ban-ts-comment': 0,
+        '@typescript-eslint/no-namespace': 0,
+        '@typescript-eslint/no-empty-function': 0,
+      },
+    },
+  ],
+};

.gitignore

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+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+pids
+*.pid
+*.seed
+*.pid.lock
+lib-cov
+coverage
+*.lcov
+.nyc_output
+.grunt
+bower_components
+.lock-wscript
+build/Release
+node_modules/
+jspm_packages/
+web_modules/
+*.tsbuildinfo
+.npm
+.eslintcache
+.stylelintcache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+.node_repl_history
+*.tgz
+.yarn-integrity
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+.cache
+.parcel-cache
+.next
+out
+.nuxt
+dist
+.cache/
+.vuepress/dist
+.temp
+.docusaurus
+.serverless/
+.fusebox/
+.dynamodb/
+.tern-port
+.vscode-test
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

.prettierrc.js

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+module.exports = {
+  semi: true,
+  trailingComma: "all",
+  singleQuote: true,
+  printWidth: 80,
+  tabWidth: 2,
+  bracketSpacing: true,
+  arrowParens: "always",
+};

.swcrc

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+{
+  "$schema": "https://json.schemastore.org/swcrc",
+  "jsc": {
+    "parser": {
+      "syntax": "typescript",
+      "decorators": true,
+      "dynamicImport": true
+    },
+    "baseUrl": "./",
+    "paths": {
+      "@/*": [
+        "src/*"
+      ]
+    }
+  },
+  "env": {
+    "targets": {
+      "node": "12"
+    },
+  },
+  "module": {
+    "type": "commonjs"
+  },
+  "sourceMaps": true
+}

README.md

@@ -1 +1,15 @@
 # Node.js Agent
+
+What we track:
+
+- Node.js version
+- Node.js agent version
+- Hosts
+- CPU
+- Memory
+- Event Loop Latency
+- Garbage Collection Duration
+
+# Supported Versions
+
+Node.js 12 and above.

demo/.env.example

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+MONTI_APP_ID=
+MONTI_APP_SECRET=
+MONTI_ENDPOINT=http://localhost:11011

demo/.gitignore

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+.env
+node_modules

demo/.montirc.yaml

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+hostname: 'localhost'

demo/index.js

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+import '@monti-apm/agent';
+
+let count = 0;
+
+console.log(process.env.MONTI_APP_ID);
+
+setInterval(() => {
+  count += 1;
+  console.log(count);
+}, 1000);

demo/package.json

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+{
+  "name": "demo",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "start": "node -r dotenv/config index.js"
+  },
+  "keywords": [],
+  "author": "Monti APM",
+  "license": "MIT",
+  "dependencies": {
+    "dotenv": "^16.3.1"
+  }
+}

diagrams/BOOTSTRAP.mmd

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+---
+title: Bootstrap
+---
+graph
+    A[Kadira._startInstrumenting] -- attempt to connect with env first --> B[Kadira._connectWithEnv]
+    A -- with settings afterwards --> C[Kadira._connectWithSettings]
+
+    B --> D[Kadira.connect]
+    C -- after each the `connect` method is overridden so it throws whenever it is called again --> D