sanbuphy
d174ceea32
- Add new interactive components for frontend routing, browser rendering pipeline, and database transactions - Improve existing demos with better visuals, explanations, and examples - Update documentation structure and content for better clarity - Add new utility scripts and update package.json with new commands - Fix formatting and alignment in documentation tables
319 lines
7.8 KiB
Vue
319 lines
7.8 KiB
Vue
<template>
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<div class="acid-demo">
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<div class="demo-header">
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<span class="icon">🔒</span>
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<span class="title">事务 ACID 特性演示</span>
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<span class="subtitle">理解事务如何保证数据安全</span>
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</div>
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<div class="intro-text">
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想象<span class="highlight">银行转账</span>：A 转给 B 100 元。这个操作包含两步：从 A 扣 100，给 B 加 100。如果只扣了钱但没到账，就是灾难。事务保证这两步<span class="highlight">要么全成功，要么全失败</span>。
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</div>
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<div class="acid-cards">
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<div
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v-for="item in acidItems"
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:key="item.key"
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class="acid-card"
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:class="{ active: activeItem === item.key }"
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@click="activeItem = activeItem === item.key ? null : item.key"
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>
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<div class="card-icon">{{ item.icon }}</div>
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<div class="card-letter">{{ item.letter }}</div>
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<div class="card-name">{{ item.name }}</div>
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<div class="card-meaning">{{ item.meaning }}</div>
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</div>
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</div>
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<Transition name="fade">
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<div v-if="activeItem" class="detail-panel">
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<div class="detail-header">
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<span class="detail-icon">{{ currentItem?.icon }}</span>
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<span class="detail-title">{{ currentItem?.name }} ({{ currentItem?.letter }})</span>
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</div>
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<div class="detail-content">
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<div class="explanation">
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<strong>含义：</strong>{{ currentItem?.explanation }}
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</div>
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<div class="example">
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<div class="example-label">🌰 银行转账例子：</div>
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<div class="example-text">{{ currentItem?.example }}</div>
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</div>
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</div>
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</div>
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</Transition>
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<div v-if="!activeItem" class="hint-text">
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👆 点击上方任意特性，查看详细解释
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</div>
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<div class="scenario-box">
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<div class="scenario-title">🎯 12306 抢票场景</div>
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<div class="scenario-content">
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<p><strong>场景：</strong>用户 A 和 B 同时看到还剩 1 张票，同时点击购买。</p>
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<p><strong>没有事务：</strong>A 扣库存，B 也扣库存，同一张票卖给了两个人！</p>
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<p><strong>有事务（隔离性）：</strong>A 的操作加锁，B 必须等待。A 买完后，库存变为 0，B 看到的是"已售罄"。</p>
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</div>
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</div>
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<div class="info-box">
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<span class="icon">💡</span>
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<strong>核心思想：</strong>ACID 四个特性共同保证了数据在高并发环境下的<span class="highlight">不丢、不乱、不冲突</span>。这就是为什么所有涉及资金、订单的系统都必须使用数据库事务。
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</div>
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</div>
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</template>
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<script setup>
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import { ref, computed } from 'vue'
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const activeItem = ref(null)
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const acidItems = ref([
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{
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key: 'atomicity',
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letter: 'A',
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icon: '⚛️',
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name: '原子性',
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meaning: 'Atomicity',
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explanation: '事务中的操作要么全部成功，要么全部失败，不会出现"做了一半"的情况。',
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example: '转账时，扣款和入账必须同时成功。如果扣款成功但入账失败，系统会自动回滚，把钱退回去。'
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},
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{
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key: 'consistency',
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letter: 'C',
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icon: '⚖️',
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name: '一致性',
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meaning: 'Consistency',
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explanation: '事务执行前后，数据都必须处于合法状态，满足所有约束条件。',
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example: '转账前后，A 和 B 的余额总和必须不变。票卖完了，库存必须是 0，不能是负数。'
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},
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{
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key: 'isolation',
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letter: 'I',
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icon: '🔒',
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name: '隔离性',
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meaning: 'Isolation',
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explanation: '多个事务同时执行时，互不干扰，每个事务都感觉不到其他事务的存在。',
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example: 'A 在买票时，B 看到的结果应该是"已售罄"或"还剩 1 张"，不会看到 A 买了一半的中间状态（比如库存变成了 0.5）。'
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},
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{
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key: 'durability',
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letter: 'D',
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icon: '💾',
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name: '持久性',
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meaning: 'Durability',
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explanation: '事务一旦提交，结果就会永久保存，即使断电、宕机也不会丢失。',
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example: '订单成功后，即使服务器立刻断电，已售出的票记录也不会消失。重启服务器后，数据依然在。'
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}
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])
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const currentItem = computed(() => {
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return acidItems.value.find(item => item.key === activeItem.value)
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})
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</script>
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<style scoped>
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.acid-demo {
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border: 1px solid var(--vp-c-divider);
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border-radius: 8px;
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background: var(--vp-c-bg-soft);
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padding: 1rem;
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margin: 1rem 0;
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}
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.demo-header {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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margin-bottom: 0.75rem;
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}
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.demo-header .icon { font-size: 1.25rem; }
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.demo-header .title { font-weight: bold; font-size: 1rem; }
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.demo-header .subtitle { color: var(--vp-c-text-2); font-size: 0.85rem; margin-left: 0.5rem; }
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.intro-text {
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font-size: 0.9rem;
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color: var(--vp-c-text-2);
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line-height: 1.6;
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margin-bottom: 1rem;
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padding: 0.75rem;
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background: var(--vp-c-bg);
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border-radius: 6px;
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}
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.intro-text .highlight {
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color: var(--vp-c-brand-1);
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font-weight: 500;
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}
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.acid-cards {
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display: grid;
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grid-template-columns: repeat(4, 1fr);
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gap: 0.75rem;
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margin-bottom: 1rem;
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}
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@media (max-width: 768px) {
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.acid-cards {
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grid-template-columns: repeat(2, 1fr);
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}
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}
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.acid-card {
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background: var(--vp-c-bg);
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border: 1px solid var(--vp-c-divider);
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border-radius: 8px;
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padding: 0.75rem;
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text-align: center;
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cursor: pointer;
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transition: all 0.2s;
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}
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.acid-card:hover {
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background: var(--vp-c-bg-soft);
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}
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.acid-card.active {
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background: var(--vp-c-brand-soft);
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border-color: var(--vp-c-brand);
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}
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.card-icon {
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font-size: 1.5rem;
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margin-bottom: 0.25rem;
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}
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.card-letter {
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font-size: 1.25rem;
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font-weight: bold;
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color: var(--vp-c-brand-1);
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margin-bottom: 0.25rem;
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}
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.card-name {
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font-size: 0.85rem;
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font-weight: 600;
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margin-bottom: 0.25rem;
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}
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.card-meaning {
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font-size: 0.7rem;
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color: var(--vp-c-text-3);
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font-family: monospace;
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}
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.detail-panel {
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background: var(--vp-c-bg);
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border-radius: 8px;
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padding: 1rem;
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margin-bottom: 0.75rem;
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border: 1px solid var(--vp-c-divider);
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}
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.detail-header {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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margin-bottom: 0.75rem;
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}
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.detail-icon {
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font-size: 1.5rem;
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}
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.detail-title {
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font-weight: 600;
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font-size: 1rem;
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color: var(--vp-c-text-1);
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}
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.detail-content {
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display: flex;
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flex-direction: column;
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gap: 0.75rem;
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}
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.explanation {
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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line-height: 1.5;
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}
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.example {
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background: var(--vp-c-bg-soft);
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padding: 0.75rem;
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border-radius: 6px;
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border-left: 3px solid var(--vp-c-brand);
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}
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.example-label {
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font-size: 0.8rem;
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font-weight: 500;
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color: var(--vp-c-text-2);
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margin-bottom: 0.5rem;
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}
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.example-text {
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font-size: 0.85rem;
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color: var(--vp-c-text-1);
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line-height: 1.5;
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}
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.hint-text {
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text-align: center;
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font-size: 0.85rem;
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color: var(--vp-c-text-3);
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margin-bottom: 0.75rem;
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}
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.scenario-box {
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background: rgba(34, 197, 94, 0.05);
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border: 1px solid rgba(34, 197, 94, 0.2);
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border-radius: 6px;
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padding: 0.75rem;
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margin-bottom: 0.75rem;
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}
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.scenario-title {
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font-size: 0.85rem;
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font-weight: 600;
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margin-bottom: 0.5rem;
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color: var(--vp-c-text-1);
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}
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.scenario-content p {
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font-size: 0.8rem;
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color: var(--vp-c-text-2);
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margin: 0.25rem 0;
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line-height: 1.5;
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}
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.fade-enter-active,
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.fade-leave-active {
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transition: opacity 0.2s ease, transform 0.2s ease;
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}
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.fade-enter-from,
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.fade-leave-to {
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opacity: 0;
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transform: translateY(-10px);
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}
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.info-box {
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background: var(--vp-c-bg-alt);
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padding: 0.75rem;
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border-radius: 6px;
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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line-height: 1.5;
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}
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.info-box .icon { margin-right: 0.25rem; }
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.info-box .highlight {
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color: var(--vp-c-brand-1);
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font-weight: 500;
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}
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</style>
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