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interview/10-中间件/Selector多路复用模型.md
yasinshaw fabdaaee1f docs: 优化Java NIO文档图解,使用Excalidraw可视化 
- 将ASCII文字图替换为专业的Excalidraw图表
- 新增4个可视化图表:三大核心组件架构、Selector多路复用模型、Buffer核心属性、零拷贝原理对比
- 图表使用配色方案区分不同组件(蓝色-Channel, 绿色-Buffer, 橙色-Selector)
- 在Obsidian中可通过![[...]]语法直接嵌入查看
2026-03-08 11:25:54 +08:00

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---
excalidraw-plugin: parsed
tags: [excalidraw]
---
==⚠ Switch to EXCALIDRAW VIEW in the MORE OPTIONS menu of this document. ⚠== You can decompress Drawing data with the command palette: 'Decompress current Excalidraw file'. For more info check in plugin settings under 'Saving'
# Excalidraw Data
## Text Elements
%%
## Drawing
```json
{
"type": "excalidraw",
"version": 2,
"source": "https://github.com/zsviczian/obsidian-excalidraw-plugin",
"elements": [
{
"id": "title",
"type": "text",
"x": 400,
"y": 30,
"width": 400,
"height": 35,
"angle": 0,
"strokeColor": "#1e40af",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 1,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "Selector 多路复用模型",
"fontSize": 28,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "Selector 多路复用模型",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "selector-container",
"type": "rectangle",
"x": 200,
"y": 120,
"width": 800,
"height": 250,
"angle": 0,
"strokeColor": "#f59e0b",
"backgroundColor": "#fff3bf",
"fillStyle": "solid",
"strokeWidth": 3,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 30,
"groupIds": [],
"roundness": {"type": 3},
"seed": 2,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false
},
{
"id": "selector-box",
"type": "rectangle",
"x": 480,
"y": 145,
"width": 240,
"height": 80,
"angle": 0,
"strokeColor": "#e67700",
"backgroundColor": "#ffd8a8",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": {"type": 3},
"seed": 3,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false
},
{
"id": "selector-text",
"type": "text",
"x": 535,
"y": 160,
"width": 130,
"height": 50,
"angle": 0,
"strokeColor": "#e67700",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 4,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "Selector\nselect「」等待",
"fontSize": 20,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "Selector\nselect「」等待",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "channel1-box",
"type": "rectangle",
"x": 250,
"y": 270,
"width": 120,
"height": 60,
"angle": 0,
"strokeColor": "#1971c2",
"backgroundColor": "#a5d8ff",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": {"type": 3},
"seed": 5,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false
},
{
"id": "channel1-text",
"type": "text",
"x": 275,
"y": 285,
"width": 70,
"height": 30,
"angle": 0,
"strokeColor": "#1864ab",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 6,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "Channel1\n就绪",
"fontSize": 16,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "Channel1\n就绪",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "channel2-box",
"type": "rectangle",
"x": 440,
"y": 270,
"width": 120,
"height": 60,
"angle": 0,
"strokeColor": "#1971c2",
"backgroundColor": "#a5d8ff",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": {"type": 3},
"seed": 7,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false
},
{
"id": "channel2-text",
"type": "text",
"x": 465,
"y": 285,
"width": 70,
"height": 30,
"angle": 0,
"strokeColor": "#1864ab",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 8,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "Channel2\n就绪",
"fontSize": 16,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "Channel2\n就绪",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "channel3-box",
"type": "rectangle",
"x": 630,
"y": 270,
"width": 120,
"height": 60,
"angle": 0,
"strokeColor": "#1971c2",
"backgroundColor": "#a5d8ff",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": {"type": 3},
"seed": 9,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false
},
{
"id": "channel3-text",
"type": "text",
"x": 655,
"y": 285,
"width": 70,
"height": 30,
"angle": 0,
"strokeColor": "#1864ab",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 10,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "Channel3\n就绪",
"fontSize": 16,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "Channel3\n就绪",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "channel-dots",
"type": "text",
"x": 800,
"y": 285,
"width": 50,
"height": 30,
"angle": 0,
"strokeColor": "#374151",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 11,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "...",
"fontSize": 24,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "...",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "eventloop-box",
"type": "rectangle",
"x": 400,
"y": 420,
"width": 400,
"height": 120,
"angle": 0,
"strokeColor": "#7c3aed",
"backgroundColor": "#d0bfff",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": {"type": 3},
"seed": 12,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false
},
{
"id": "eventloop-title",
"type": "text",
"x": 520,
"y": 435,
"width": 160,
"height": 30,
"angle": 0,
"strokeColor": "#5f3dc4",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 13,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "Event Loop",
"fontSize": 24,
"fontFamily": 5,
"textAlign": "center",
"verticalAlign": "middle",
"containerId": null,
"originalText": "Event Loop",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "eventloop-desc",
"type": "text",
"x": 420,
"y": 480,
"width": 360,
"height": 45,
"angle": 0,
"strokeColor": "#374151",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 14,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "• select「」 - 等待就绪事件\n• process「」 - 处理事件\n• repeat - 循环执行",
"fontSize": 16,
"fontFamily": 5,
"textAlign": "left",
"verticalAlign": "middle",
"containerId": null,
"originalText": "• select「」 - 等待就绪事件\n• process「」 - 处理事件\n• repeat - 循环执行",
"autoResize": true,
"lineHeight": 1.25
},
{
"id": "arrow-thread",
"type": "arrow",
"x": 600,
"y": 370,
"width": 0,
"height": 40,
"angle": 0,
"strokeColor": "#7c3aed",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 3,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": {"type": 2},
"seed": 15,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"points": [[0, 0], [0, 40]],
"lastCommittedPoint": null,
"startBinding": null,
"endBinding": null,
"startArrowhead": null,
"endArrowhead": "arrow"
},
{
"id": "label-onethread",
"type": "text",
"x": 615,
"y": 380,
"width": 100,
"height": 20,
"angle": 0,
"strokeColor": "#7c3aed",
"backgroundColor": "transparent",
"fillStyle": "solid",
"strokeWidth": 2,
"strokeStyle": "solid",
"roughness": 1,
"opacity": 100,
"groupIds": [],
"roundness": null,
"seed": 16,
"version": 1,
"isDeleted": false,
"boundElements": null,
"updated": 1,
"link": null,
"locked": false,
"text": "单线程管理",
"fontSize": 16,
"fontFamily": 5,
"textAlign": "left",
"verticalAlign": "middle",
"containerId": null,
"originalText": "单线程管理",
"autoResize": true,
"lineHeight": 1.25
}
],
"appState": {
"gridSize": null,
"viewBackgroundColor": "#ffffff"
},
"files": {}
}
```
%%
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