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自己动手实现RPC框架

司马极客 软件工程师
难度中级
时长 2小时40分
学习人数
综合评分8.97
27人评价 查看评价
9.0 内容实用
8.6 简洁易懂
9.3 逻辑清晰
  • RPC:也可以理解成跨进程访问

    查看全部
    0 采集 收起 来源:概念讲解

    2023-07-19

  • <!doctype html>

    <html style='font-size:18px !important'>

    <head>

    <meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>


    <link href='https://fonts.loli.net/css?family=Open+Sans:400italic,700italic,700,400&subset=latin,latin-ext' rel='stylesheet' type='text/css' /><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; --title-bar-height:20px; }

    .mac-os-11 { --title-bar-height:28px; }

    html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }

    h1, h2, h3, h4, h5 { white-space: pre-wrap; }

    body { margin: 0px; padding: 0px; height: auto; inset: 0px; font-size: 1rem; line-height: 1.42857; overflow-x: hidden; background: inherit; tab-size: 4; }

    iframe { margin: auto; }

    a.url { word-break: break-all; }

    a:active, a:hover { outline: 0px; }

    .in-text-selection, ::selection { text-shadow: none; background: var(--select-text-bg-color); color: var(--select-text-font-color); }

    #write { margin: 0px auto; height: auto; width: inherit; word-break: normal; overflow-wrap: break-word; position: relative; white-space: normal; overflow-x: visible; padding-top: 36px; }

    #write.first-line-indent p { text-indent: 2em; }

    #write.first-line-indent li p, #write.first-line-indent p * { text-indent: 0px; }

    #write.first-line-indent li { margin-left: 2em; }

    .for-image #write { padding-left: 8px; padding-right: 8px; }

    body.typora-export { padding-left: 30px; padding-right: 30px; }

    .typora-export .footnote-line, .typora-export li, .typora-export p { white-space: pre-wrap; }

    .typora-export .task-list-item input { pointer-events: none; }

    @media screen and (max-width: 500px) {

      body.typora-export { padding-left: 0px; padding-right: 0px; }

      #write { padding-left: 20px; padding-right: 20px; }

    }

    #write li > figure:last-child { margin-bottom: 0.5rem; }

    #write ol, #write ul { position: relative; }

    img { max-width: 100%; vertical-align: middle; image-orientation: from-image; }

    button, input, select, textarea { color: inherit; font: inherit; }

    input[type="checkbox"], input[type="radio"] { line-height: normal; padding: 0px; }

    *, ::after, ::before { box-sizing: border-box; }

    #write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p, #write pre { width: inherit; }

    #write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p { position: relative; }

    p { line-height: inherit; }

    h1, h2, h3, h4, h5, h6 { break-after: avoid-page; break-inside: avoid; orphans: 4; }

    p { orphans: 4; }

    h1 { font-size: 2rem; }

    h2 { font-size: 1.8rem; }

    h3 { font-size: 1.6rem; }

    h4 { font-size: 1.4rem; }

    h5 { font-size: 1.2rem; }

    h6 { font-size: 1rem; }

    .md-math-block, .md-rawblock, h1, h2, h3, h4, h5, h6, p { margin-top: 1rem; margin-bottom: 1rem; }

    .hidden { display: none; }

    .md-blockmeta { color: rgb(204, 204, 204); font-weight: 700; font-style: italic; }

    a { cursor: pointer; }

    sup.md-footnote { padding: 2px 4px; background-color: rgba(238, 238, 238, 0.7); color: rgb(85, 85, 85); border-radius: 4px; cursor: pointer; }

    sup.md-footnote a, sup.md-footnote a:hover { color: inherit; text-transform: inherit; text-decoration: inherit; }

    #write input[type="checkbox"] { cursor: pointer; width: inherit; height: inherit; }

    figure { overflow-x: auto; margin: 1.2em 0px; max-width: calc(100% + 16px); padding: 0px; }

    figure > table { margin: 0px; }

    thead, tr { break-inside: avoid; break-after: auto; }

    thead { display: table-header-group; }

    table { border-collapse: collapse; border-spacing: 0px; width: 100%; overflow: auto; break-inside: auto; text-align: left; }

    table.md-table td { min-width: 32px; }

    .CodeMirror-gutters { border-right: 0px; background-color: inherit; }

    .CodeMirror-linenumber { user-select: none; }

    .CodeMirror { text-align: left; }

    .CodeMirror-placeholder { opacity: 0.3; }

    .CodeMirror pre { padding: 0px 4px; }

    .CodeMirror-lines { padding: 0px; }

    div.hr:focus { cursor: none; }

    #write pre { white-space: pre-wrap; }

    #write.fences-no-line-wrapping pre { white-space: pre; }

    #write pre.ty-contain-cm { white-space: normal; }

    .CodeMirror-gutters { margin-right: 4px; }

    .md-fences { font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; overflow: visible; white-space: pre; background: inherit; position: relative !important; }

    .md-fences-adv-panel { width: 100%; margin-top: 10px; text-align: center; padding-top: 0px; padding-bottom: 8px; overflow-x: auto; }

    #write .md-fences.mock-cm { white-space: pre-wrap; }

    .md-fences.md-fences-with-lineno { padding-left: 0px; }

    #write.fences-no-line-wrapping .md-fences.mock-cm { white-space: pre; overflow-x: auto; }

    .md-fences.mock-cm.md-fences-with-lineno { padding-left: 8px; }

    .CodeMirror-line, twitterwidget { break-inside: avoid; }

    svg { break-inside: avoid; }

    .footnotes { opacity: 0.8; font-size: 0.9rem; margin-top: 1em; margin-bottom: 1em; }

    .footnotes + .footnotes { margin-top: 0px; }

    .md-reset { margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: top; background: 0px 0px; text-decoration: none; text-shadow: none; float: none; position: static; width: auto; height: auto; white-space: nowrap; cursor: inherit; -webkit-tap-highlight-color: transparent; line-height: normal; font-weight: 400; text-align: left; box-sizing: content-box; direction: ltr; }

    li div { padding-top: 0px; }

    blockquote { margin: 1rem 0px; }

    li .mathjax-block, li p { margin: 0.5rem 0px; }

    li blockquote { margin: 1rem 0px; }

    li { margin: 0px; position: relative; }

    blockquote > :last-child { margin-bottom: 0px; }

    blockquote > :first-child, li > :first-child { margin-top: 0px; }

    .footnotes-area { color: rgb(136, 136, 136); margin-top: 0.714rem; padding-bottom: 0.143rem; white-space: normal; }

    #write .footnote-line { white-space: pre-wrap; }

    @media print {

      body, html { border: 1px solid transparent; height: 99%; break-after: avoid; break-before: avoid; font-variant-ligatures: no-common-ligatures; }

      #write { margin-top: 0px; border-color: transparent !important; padding-top: 0px !important; padding-bottom: 0px !important; }

      .typora-export * { -webkit-print-color-adjust: exact; }

      .typora-export #write { break-after: avoid; }

      .typora-export #write::after { height: 0px; }

      .is-mac table { break-inside: avoid; }

      #write > p:nth-child(1) { margin-top: 0px; }

      .typora-export-show-outline .typora-export-sidebar { display: none; }

      figure { overflow-x: visible; }

    }

    .footnote-line { margin-top: 0.714em; font-size: 0.7em; }

    a img, img a { cursor: pointer; }

    pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; }

    p > .md-image:only-child:not(.md-img-error) img, p > img:only-child { display: block; margin: auto; }

    #write.first-line-indent p > .md-image:only-child:not(.md-img-error) img { left: -2em; position: relative; }

    p > .md-image:only-child { display: inline-block; width: 100%; }

    #write .MathJax_Display { margin: 0.8em 0px 0px; }

    .md-math-block { width: 100%; }

    .md-math-block:not(:empty)::after { display: none; }

    .MathJax_ref { fill: currentcolor; }

    [contenteditable="true"]:active, [contenteditable="true"]:focus, [contenteditable="false"]:active, [contenteditable="false"]:focus { outline: 0px; box-shadow: none; }

    .md-task-list-item { position: relative; list-style-type: none; }

    .task-list-item.md-task-list-item { padding-left: 0px; }

    .md-task-list-item > input { position: absolute; top: 0px; left: 0px; margin-left: -1.2em; margin-top: calc(1em - 10px); border: none; }

    .math { font-size: 1rem; }

    .md-toc { min-height: 3.58rem; position: relative; font-size: 0.9rem; border-radius: 10px; }

    .md-toc-content { position: relative; margin-left: 0px; }

    .md-toc-content::after, .md-toc::after { display: none; }

    .md-toc-item { display: block; color: rgb(65, 131, 196); }

    .md-toc-item a { text-decoration: none; }

    .md-toc-inner:hover { text-decoration: underline; }

    .md-toc-inner { display: inline-block; cursor: pointer; }

    .md-toc-h1 .md-toc-inner { margin-left: 0px; font-weight: 700; }

    .md-toc-h2 .md-toc-inner { margin-left: 2em; }

    .md-toc-h3 .md-toc-inner { margin-left: 4em; }

    .md-toc-h4 .md-toc-inner { margin-left: 6em; }

    .md-toc-h5 .md-toc-inner { margin-left: 8em; }

    .md-toc-h6 .md-toc-inner { margin-left: 10em; }

    @media screen and (max-width: 48em) {

      .md-toc-h3 .md-toc-inner { margin-left: 3.5em; }

      .md-toc-h4 .md-toc-inner { margin-left: 5em; }

      .md-toc-h5 .md-toc-inner { margin-left: 6.5em; }

      .md-toc-h6 .md-toc-inner { margin-left: 8em; }

    }

    a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; }

    .footnote-line a:not(.reversefootnote) { color: inherit; }

    .reversefootnote { font-family: ui-monospace, sans-serif; }

    .md-attr { display: none; }

    .md-fn-count::after { content: "."; }

    code, pre, samp, tt { font-family: var(--monospace); }

    kbd { margin: 0px 0.1em; padding: 0.1em 0.6em; font-size: 0.8em; color: rgb(36, 39, 41); background: rgb(255, 255, 255); border: 1px solid rgb(173, 179, 185); border-radius: 3px; box-shadow: rgba(12, 13, 14, 0.2) 0px 1px 0px, rgb(255, 255, 255) 0px 0px 0px 2px inset; white-space: nowrap; vertical-align: middle; }

    .md-comment { color: rgb(162, 127, 3); opacity: 0.6; font-family: var(--monospace); }

    code { text-align: left; vertical-align: initial; }

    a.md-print-anchor { white-space: pre !important; border-width: initial !important; border-style: none !important; border-color: initial !important; display: inline-block !important; position: absolute !important; width: 1px !important; right: 0px !important; outline: 0px !important; background: 0px 0px !important; text-decoration: initial !important; text-shadow: initial !important; }

    .os-windows.monocolor-emoji .md-emoji { font-family: "Segoe UI Symbol", sans-serif; }

    .md-diagram-panel > svg { max-width: 100%; }

    [lang="flow"] svg, [lang="mermaid"] svg { max-width: 100%; height: auto; }

    [lang="mermaid"] .node text { font-size: 1rem; }

    table tr th { border-bottom: 0px; }

    video { max-width: 100%; display: block; margin: 0px auto; }

    iframe { max-width: 100%; width: 100%; border: none; }

    .highlight td, .highlight tr { border: 0px; }

    mark { background: rgb(255, 255, 0); color: rgb(0, 0, 0); }

    .md-html-inline .md-plain, .md-html-inline strong, mark .md-inline-math, mark strong { color: inherit; }

    .md-expand mark .md-meta { opacity: 0.3 !important; }

    mark .md-meta { color: rgb(0, 0, 0); }

    @media print {

      .typora-export h1, .typora-export h2, .typora-export h3, .typora-export h4, .typora-export h5, .typora-export h6 { break-inside: avoid; }

    }

    .md-diagram-panel .messageText { stroke: none !important; }

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    .typora-export-sidebar { width: 300px; font-size: 0.8rem; margin-top: 80px; margin-right: 18px; }

    .typora-export-show-outline #write { --webkit-flex:2; flex: 2 1 0%; }

    .typora-export-sidebar .outline-content { position: fixed; top: 0px; max-height: 100%; overflow: hidden auto; padding-bottom: 30px; padding-top: 60px; width: 300px; }

    @media screen and (max-width: 1024px) {

      .typora-export-sidebar, .typora-export-sidebar .outline-content { width: 240px; }

    }

    @media screen and (max-width: 800px) {

      .typora-export-sidebar { display: none; }

    }

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    .outline-content ul { margin-top: 0px; margin-bottom: 0px; }

    .outline-content strong { font-weight: 400; }

    .outline-expander { width: 1rem; height: 1.42857rem; position: relative; display: table-cell; vertical-align: middle; cursor: pointer; padding-left: 4px; }

    .outline-expander::before { content: ""; position: relative; font-family: Ionicons; display: inline-block; font-size: 8px; vertical-align: middle; }

    .outline-item { padding-top: 3px; padding-bottom: 3px; cursor: pointer; }

    .outline-expander:hover::before { content: ""; }

    .outline-h1 > .outline-item { padding-left: 0px; }

    .outline-h2 > .outline-item { padding-left: 1em; }

    .outline-h3 > .outline-item { padding-left: 2em; }

    .outline-h4 > .outline-item { padding-left: 3em; }

    .outline-h5 > .outline-item { padding-left: 4em; }

    .outline-h6 > .outline-item { padding-left: 5em; }

    .outline-label { cursor: pointer; display: table-cell; vertical-align: middle; text-decoration: none; color: inherit; }

    .outline-label:hover { text-decoration: underline; }

    .outline-item:hover { border-color: rgb(245, 245, 245); background-color: var(--item-hover-bg-color); }

    .outline-item:hover { margin-left: -28px; margin-right: -28px; border-left: 28px solid transparent; border-right: 28px solid transparent; }

    .outline-item-single .outline-expander::before, .outline-item-single .outline-expander:hover::before { display: none; }

    .outline-item-open > .outline-item > .outline-expander::before { content: ""; }

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    .typora-export .outline-item:hover { margin-right: -8px; border-right: 8px solid transparent; }

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    .typora-export .outline-expander:hover::before, .typora-export .outline-item-open > .outline-item > .outline-expander::before { content: "−"; }

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    .typora-export-show-outline .outline-item-active > .outline-item .outline-label { font-weight: 700; }

    .md-inline-math-container mjx-container { zoom: 0.95; }

    mjx-container { break-inside: avoid; }



    :root {

        --side-bar-bg-color: #fafafa;

        --control-text-color: #777;

    }


    @include-when-export url(https://fonts.loli.net/css?family=Open+Sans:400italic,700italic,700,400&subset=latin,latin-ext);


    /* open-sans-regular - latin-ext_latin */

      /* open-sans-italic - latin-ext_latin */

        /* open-sans-700 - latin-ext_latin */

        /* open-sans-700italic - latin-ext_latin */

      html {

        font-size: 16px;

        -webkit-font-smoothing: antialiased;

    }


    body {

        font-family: "Open Sans","Clear Sans", "Helvetica Neue", Helvetica, Arial, 'Segoe UI Emoji', sans-serif;

        color: rgb(51, 51, 51);

        line-height: 1.6;

    }


    #write {

        max-width: 860px;

       margin: 0 auto;

       padding: 30px;

        padding-bottom: 100px;

    }


    @media only screen and (min-width: 1400px) {

    #write {

    max-width: 1024px;

    }

    }


    @media only screen and (min-width: 1800px) {

    #write {

    max-width: 1200px;

    }

    }


    #write > ul:first-child,

    #write > ol:first-child{

        margin-top: 30px;

    }


    a {

        color: #4183C4;

    }

    h1,

    h2,

    h3,

    h4,

    h5,

    h6 {

        position: relative;

        margin-top: 1rem;

        margin-bottom: 1rem;

        font-weight: bold;

        line-height: 1.4;

        cursor: text;

    }

    h1:hover a.anchor,

    h2:hover a.anchor,

    h3:hover a.anchor,

    h4:hover a.anchor,

    h5:hover a.anchor,

    h6:hover a.anchor {

        text-decoration: none;

    }

    h1 tt,

    h1 code {

        font-size: inherit;

    }

    h2 tt,

    h2 code {

        font-size: inherit;

    }

    h3 tt,

    h3 code {

        font-size: inherit;

    }

    h4 tt,

    h4 code {

        font-size: inherit;

    }

    h5 tt,

    h5 code {

        font-size: inherit;

    }

    h6 tt,

    h6 code {

        font-size: inherit;

    }

    h1 {

        font-size: 2.25em;

        line-height: 1.2;

        border-bottom: 1px solid #eee;

    }

    h2 {

        font-size: 1.75em;

        line-height: 1.225;

        border-bottom: 1px solid #eee;

    }


    /*@media print {

        .typora-export h1,

        .typora-export h2 {

            border-bottom: none;

            padding-bottom: initial;

        }


        .typora-export h1::after,

        .typora-export h2::after {

            content: "";

            display: block;

            height: 100px;

            margin-top: -96px;

            border-top: 1px solid #eee;

        }

    }*/


    h3 {

        font-size: 1.5em;

        line-height: 1.43;

    }

    h4 {

        font-size: 1.25em;

    }

    h5 {

        font-size: 1em;

    }

    h6 {

       font-size: 1em;

        color: #777;

    }

    p,

    blockquote,

    ul,

    ol,

    dl,

    table{

        margin: 0.8em 0;

    }

    li>ol,

    li>ul {

        margin: 0 0;

    }

    hr {

        height: 2px;

        padding: 0;

        margin: 16px 0;

        background-color: #e7e7e7;

        border: 0 none;

        overflow: hidden;

        box-sizing: content-box;

    }


    li p.first {

        display: inline-block;

    }

    ul,

    ol {

        padding-left: 30px;

    }

    ul:first-child,

    ol:first-child {

        margin-top: 0;

    }

    ul:last-child,

    ol:last-child {

        margin-bottom: 0;

    }

    blockquote {

        border-left: 4px solid #dfe2e5;

        padding: 0 15px;

        color: #777777;

    }

    blockquote blockquote {

        padding-right: 0;

    }

    table {

        padding: 0;

        word-break: initial;

    }

    table tr {

        border: 1px solid #dfe2e5;

        margin: 0;

        padding: 0;

    }

    table tr:nth-child(2n),

    thead {

        background-color: #f8f8f8;

    }

    table th {

        font-weight: bold;

        border: 1px solid #dfe2e5;

        border-bottom: 0;

        margin: 0;

        padding: 6px 13px;

    }

    table td {

        border: 1px solid #dfe2e5;

        margin: 0;

        padding: 6px 13px;

    }

    table th:first-child,

    table td:first-child {

        margin-top: 0;

    }

    table th:last-child,

    table td:last-child {

        margin-bottom: 0;

    }


    .CodeMirror-lines {

        padding-left: 4px;

    }


    .code-tooltip {

        box-shadow: 0 1px 1px 0 rgba(0,28,36,.3);

        border-top: 1px solid #eef2f2;

    }


    .md-fences,

    code,

    tt {

        border: 1px solid #e7eaed;

        background-color: #f8f8f8;

        border-radius: 3px;

        padding: 0;

        padding: 2px 4px 0px 4px;

        font-size: 0.9em;

    }


    code {

        background-color: #f3f4f4;

        padding: 0 2px 0 2px;

    }


    .md-fences {

        margin-bottom: 15px;

        margin-top: 15px;

        padding-top: 8px;

        padding-bottom: 6px;

    }



    .md-task-list-item > input {

      margin-left: -1.3em;

    }


    @media print {

        html {

            font-size: 13px;

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    <div id='write'  class=' first-line-indent'><div class='md-toc' mdtype='toc'><p class="md-toc-content" role="list"><span role="listitem" class="md-toc-item md-toc-h1" data-ref="n1756"><a class="md-toc-inner" href="#分布式架构">分布式架构</a></span><span role="listitem" class="md-toc-item md-toc-h2" data-ref="n1757"><a class="md-toc-inner" href="#一rpc学习">一、RPC学习</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1758"><a class="md-toc-inner" href="#1术语">1、术语</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1779"><a class="md-toc-inner" href="#2存在的其他rpc产品">2、存在的其他RPC产品</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1802"><a class="md-toc-inner" href="#3交互方式">3、交互方式</a></span><span role="listitem" class="md-toc-item md-toc-h4" data-ref="n1803"><a class="md-toc-inner" href="#异步执行"><strong>异步执行</strong></a></span><span role="listitem" class="md-toc-item md-toc-h4" data-ref="n1832"><a class="md-toc-inner" href="#同步执行"><strong>同步执行</strong></a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1855"><a class="md-toc-inner" href="#4rpc名词术语变化">4、RPC名词术语变化</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1873"><a class="md-toc-inner" href="#5rpc常用框架比较">5、RPC常用框架比较</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1882"><a class="md-toc-inner" href="#6核心原理">6、核心原理</a></span><span role="listitem" class="md-toc-item md-toc-h4" data-ref="n1883"><a class="md-toc-inner" href="#1)服务暴露全流程">1)服务暴露全流程</a></span><span role="listitem" class="md-toc-item md-toc-h4" data-ref="n1892"><a class="md-toc-inner" href="#2)订阅接口">2)订阅接口</a></span><span role="listitem" class="md-toc-item md-toc-h4" data-ref="n1896"><a class="md-toc-inner" href="#3)整体流程">3)整体流程</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1925"><a class="md-toc-inner" href="#7call-调用过程详解">7、Call 调用过程详解</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1946"><a class="md-toc-inner" href="#8需要技术">8、需要技术</a></span><span role="listitem" class="md-toc-item md-toc-h3" data-ref="n1986"><a class="md-toc-inner" href="#9实战开发">9、实战开发</a></span></p></div><h1 id='分布式架构'><span>分布式架构</span></h1><h2 id='一rpc学习'><span>一、RPC学习</span></h2><h3 id='1术语'><span>1、术语</span></h3><p><strong><span>RPC(Remote Procedure Call)</span></strong></p><ul><li><p><span>翻译为远程过程调用,一种常见的分布式通信方式。</span></p></li><li><p><span>拆解:</span></p><figure><table><thead><tr><th><span>名词</span></th><th><span>描述</span></th></tr></thead><tbody><tr><td><span>远程(Remote)</span></td><td><span>指的是大于一台的计算机或程序或服务器</span></td></tr><tr><td><span>过程(Procedure)</span></td><td><span>指的是调用函数或方法</span></td></tr><tr><td><span>调用(Call)</span></td><td><span>指的是调用跨进程(服务器)的方法</span></td></tr></tbody></table></figure></li></ul><h3 id='2存在的其他rpc产品'><span>2、存在的其他RPC产品</span></h3><figure><table><thead><tr><th><span>名称</span></th><th><span>描述</span></th></tr></thead><tbody><tr><td><span>RESTFUL</span></td><td><span>跨进程交互形式</span></td></tr><tr><td><span>WebService</span></td><td><span>跨进程交互形式</span></td></tr><tr><td><span>HTTP</span></td><td><span>跨进程交互形式</span></td></tr><tr><td><span>基于DB做数据交换</span></td><td><span>跨进程交互形式</span></td></tr><tr><td><span>基于MQ做数据交换</span></td><td><span>跨进程交互形式</span></td></tr><tr><td><span>RPC</span></td><td><span>跨进程交互形式</span></td></tr></tbody></table></figure><h3 id='3交互方式'><span>3、交互方式</span></h3><h4 id='异步执行'><strong><span>异步执行</span></strong></h4><ul><li><p><span>两个系统异步执行,相互之间不影响,系统A存入数据到中间件中,系统B去数据中间件中取数据,A和B之间互不影响。</span></p></li><li><p><span>数据可以长时间保持在中间件之中的。系统B,想什么时候取就什么时候取,中间件中的数据允许被积压的。 </span></p></li><li><p><span>这种交互方式一般是中间件交互。仓用的中间件有</span></p><figure><table><thead><tr><th><span>名称</span></th><th><span>中间件名称</span></th><th><span>备注</span></th></tr></thead><tbody><tr><td><span>MySQL</span></td><td><span>数据库</span></td><td><span>对于数据要求可靠性比较高的系统选择这个,</span><strong><span>Azkaban</span></strong><span>用的就是这个做的任务存取,分发</span></td></tr><tr><td><span>RabbitMQ</span></td><td><span>消息中间件</span></td><td><span>对于数据要求可靠性比较高的系统选择这个,订单消息系统用的比较多</span></td></tr><tr><td><span>KafKa</span></td><td><span>消息中间件</span></td><td>&nbsp;</td></tr><tr><td><span>Redis</span></td><td><span>缓存数据库</span></td><td>&nbsp;</td></tr></tbody></table></figure></li></ul><h4 id='同步执行'><strong><span>同步执行</span></strong></h4><ul><li><p><span>服务端(接口的系统)的数据会直接影响客户端(界面)。</span></p></li><li><p><span>需要更高的响应速度,客户端会一直等待服务端的响应。</span></p></li></ul><figure><table><thead><tr><th><span>名称</span></th><th>&nbsp;</th></tr></thead><tbody><tr><td><span>RESTFUL</span></td><td>&nbsp;</td></tr><tr><td><span>HTTP</span></td><td>&nbsp;</td></tr><tr><td><span>WeService</span></td><td>&nbsp;</td></tr><tr><td><span>RPC</span></td><td>&nbsp;</td></tr></tbody></table></figure><p>&nbsp;</p><h3 id='4rpc名词术语变化'><span>4、RPC名词术语变化</span></h3><figure><table><thead><tr><th><span>序号</span></th><th><span>名称</span></th><th><span>修改</span></th></tr></thead><tbody><tr><td><span>1</span></td><td><span>Server(接口提供方:比如:Tomcat中的接口)</span></td><td><span>Provider :服务提供者 放在服务里的接口</span></td></tr><tr><td><span>2</span></td><td><span>Client(调用接口方,比如:前端)</span></td><td><span>Consumer:服务消费者 调用者可能是前端,也可能是其他服务器(系统)</span></td></tr><tr><td><span>3</span></td><td><span>Stub(存根,一个模拟实现。一个模拟实现。比如:swagger)</span></td><td><span>服务描述</span></td></tr></tbody></table></figure><h3 id='5rpc常用框架比较'><span>5、RPC常用框架比较</span></h3><p><img src="./../../image/image-20230611194802305.png" referrerpolicy="no-referrer" alt="image-20230611194802305"></p><ul><li><p><span>主要用的就是Dubbo和Spring Cloud了</span></p></li><li><p><span>还有国内开发的Alibaba SpringCloud.</span></p></li><li><p><span>Dubbo不仅是一个RPC框架,也是一个服务治理的框架</span></p></li></ul><h3 id='6核心原理'><span>6、核心原理</span></h3><h4 id='1)服务暴露全流程'><span>1)服务暴露全流程</span></h4><ul><li><p><span>第一步是检测配置,如果有些配置空的话会默认创建,并且组装成 URL 。</span></p></li><li><p><span>第二步是暴露服务,包括暴露到本地的服务和远程的服务。</span></p></li><li><p><span>第三步是注册服务至注册中心。</span></p><p><img src="./../../image/image-20230611200140759.png" referrerpolicy="no-referrer" alt="image-20230611200140759"></p></li></ul><h4 id='2)订阅接口'><span>2)订阅接口</span></h4><ul><li><p><span>订阅接口 :B系统在需要的时候调用A系统的接口进行数据订阅。</span></p></li></ul><h4 id='3)整体流程'><span>3)整体流程</span></h4><ul><li><p><span>第一步:RPC Server 把需要暴露的服务地址和地址信息,注册到注册中心。</span></p></li><li><p><span>第二步:RPC Client 会订阅注册中心 (从注册中心,一直关注它需要的服务在哪里)</span></p></li><li><p><span>第三步:如果RPC Server的注册地址发生改变,注册中心会通知给RPC Client</span></p></li><li><p><span>第四步:如果RPC Client获取到RPC Server的地址以及暴露服务的信息,就可以做最后一步调用了,RPC Client直接调用RPC Server。(核心步骤)</span></p></li></ul><figure><table><thead><tr><th><span>接口模式</span></th><th><span>RPC换为</span></th><th><span>备注</span></th></tr></thead><tbody><tr><td><span>Server</span></td><td><span>Provider</span></td><td><span>暴露服务,服务提供方</span></td></tr><tr><td><span>Client</span></td><td><span>Consumer</span></td><td><span>服务消费,调用远程服务</span></td></tr><tr><td><span>不存在</span></td><td><span>Registry</span></td><td><span>服务注册与发现</span></td></tr></tbody></table></figure><p><img src="./../../image/image-20230611201635301.png" referrerpolicy="no-referrer" alt="image-20230611201635301"></p><h3 id='7call-调用过程详解'><span>7、Call 调用过程详解</span></h3><p><span>1)</span><strong><span>术语</span></strong></p><figure><table><thead><tr><th><span>序号</span></th><th><span>名词</span></th><th><span>描述</span></th></tr></thead><tbody><tr><td><span>1</span></td><td><span>客户端</span></td><td><span>访问接口的哪一端,可以是前端可以是服务器</span></td></tr><tr><td><span>2</span></td><td><span>存根代理</span></td><td><span>调用哪个接口,接口中的什么方法,方法中的参数类型,返回值的类型是什么,数据的集合</span></td></tr><tr><td><span>3</span></td><td><span>服务端</span></td><td><span>创造接口的一端,一般是服务器</span></td></tr><tr><td><span>4</span></td><td><span>网络传输</span></td><td><span>建立服务之间的通信功能</span></td></tr><tr><td><span>5</span></td><td><span>序列化</span></td><td><span>传输的对象转换成适合网络传输的二进制数据(</span></td></tr></tbody></table></figure><p>&nbsp;</p><p><span>2)</span><strong><span>结构图</span></strong></p><p><img src="./../../image/image-20230611201744973.png" referrerpolicy="no-referrer" alt="image-20230611201744973"></p><p><span>3)</span><strong><span>流程描述</span></strong></p><ul><li><p><span>1.客户端调用存根中的方法</span></p></li><li><p><span>2.因为被调用的方法在远程,所以要用网络传输,才能调用方法</span></p></li><li><p><span>3.需要用socket与Server间,建立连接,然后传输数据,传输数据钱,需要把图2中的需要传输的对象转换成适合网络传输的二进制数据(这个过程叫做序列化)。</span></p></li><li><p><span>4.如果socket已经拿到序列化数据,第一件事就是把序列化数据反序列化(二进制数据转化为对象)</span></p></li><li><p><span>5.转化的对象中包含着一种客户端需要调用服务端的数据,像它要调用哪个接口,接口中的什么方法,方法中的参数类型,返回值的类型是什么(整体叫做存根)</span></p></li><li><p><span>6.Server会根据存根找到这个接口具体实现类的对象,为了性能考虑这个接口做成单例的,Server通过反射来调用方法,方法调用完成过后,就会取到结果。</span></p></li><li><p><span>7.结果进行序列化成二进制,通过网络传输响应(返回)给Client端,Client在把二进制反序列化成对象,返回给界面。</span></p></li></ul><h3 id='8需要技术'><span>8、需要技术</span></h3><p><span>1)</span><strong><span>基础知识 </span></strong></p><ul><li><p><span>Java核心(什么是类,什么是接口)、Maven(多模块管理)、反射(别名自省,代码动态调用某个方法),常用包Lombok,Apache</span></p></li></ul><p><span>2)</span><strong><span>动态代理 </span></strong></p><ul><li><p><span>流程描述中,client存根实际调用对象中(客户端调远程方法的时候),内部用的就是动态代理对象完成的。</span></p></li><li><p><span>本次使用Java自带的动态代理,新的代理JVM框架的代理:ASM,Javasist(很难)</span></p></li></ul><p><span>3)</span><strong><span>序列化</span></strong></p><ul><li><p><span>Java对象与二进制数数据转换</span></p></li><li><p><span>这里用到FastJson</span></p></li><li><p><span>java中二进制数byte和stirng转化很方便</span></p></li><li><p><span>很多语言中,字符串是用数组表示的。</span></p></li></ul><p><span>4)</span><strong><span>网络通信</span></strong></p><ul><li><p><span>传输序列化后的数据</span></p></li><li><p><span>jetty嵌入到自己的客户端中,HTTP使用URLConnection</span></p></li><li><p><span>标准都是使用TCP的长连接方式网络通信的  </span></p></li><li><p><span>网络是很难的,在Java在框架:Netty,(Apache MINA)[</span><a href='http://mina.apache.org/' target='_blank' class='url'>http://mina.apache.org/</a><span>]</span></p></li></ul><p>&nbsp;</p><h3 id='9实战开发'><span>9、实战开发</span></h3><ul><li><p><span>代码实例,看源码</span></p></li></ul><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p></div></div>

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    笔记审核中笔记正在审核中,仅自己可见 2023-06-11

  • RPC框架关键类

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    2023-04-16

  • Dubbo(读音[ˈdʌbəʊ])是阿里巴巴公司开源的一个高性能优秀的服务框架,使得应用可通过高性能的 RPC 实现服务的输出和输入功能,可以和 [1]  Spring框架无缝集成。

    Dubbo是一款高性能、轻量级的开源Java RPC框架,它提供了三大核心能力:面向接口的远程方法调用,智能容错和负载均衡,以及服务自动注册和发现。

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  • 侧丝丝

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  • 恩恩额

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  • 现有 rpc 框架对比

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  • 关联类的联系

    http://img1.sycdn.imooc.com//62a34b6d0001855b12320701.jpg

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  • 实现过程

    http://img1.sycdn.imooc.com//62a34b2c0001b6d212180662.jpg

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  • 这个模块分类让我学到了很多

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    2022-03-12

  • 协议制定:client到server做交互的通信协议,比如request response 网络端点peer


    jetty server 起到网络监听的作用

    handler注册到jetty server

    holder托管servlet

    不足和展望:

    安全性:

    身份信息校验没做,https比http多了安全控制

    序列化安全加密,建立网络连接时做身份验证

    服务端处理能力:

    jetty线程池  返回数据的通道最好做成队列形式

    注册中心:

    对RPC锦上添花,

    集成能力:

    和其他框架的嵌入结合,比如springboot结合,比如做一个springboot starter,让他自动的创建server或client

    bean factory自动创建代理对象

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    2021-09-15

  • dependencies所有模块都依赖的公用模块

    dependencymanagement是子模块可能会用到的

    <build>工程编译的版本

    把版本号提出到properties,后面的版本号用${xxx.version}指代

    lombok插件分两步:

    在plugin里面搜索安装;

    annotation processor里面勾选enable annotation那个

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  • 新建module 通过不同模块管理,原来的src就可以删了
    proto放协议

    codec序列化模块

    transport网络通信模块

    common共同方法模块

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  • 网络模块,序列化模块,agent对象

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1、RPC框架的核心原理 2、良好的编码习惯、如何使用junit编写测试用例 3、良好的工程结构以及maven怎么管理多模块 4、常见工具包的使用(commons-io、fastjson、lombok) 5、java反射的应用、java动态代理的应用 6、Map怎么自定义key 7、如何在程序中嵌入jetty
老师告诉你能学到什么?
本课程一开始会对RPC的原理进行剖析,接着会基于Java开发一个RPC框架。在开发前要求大家对Java基础有一定的了解,比如类和接口怎么定义。同时还会用到一些Java Servlet相关知识,主要是能区分Servlet的post和get方法的作用。

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