Sync docs from master to gh-pages

This commit is contained in:
Marcin Grzejszczak
2019-03-07 17:41:37 +01:00
parent 6a13245783
commit 98e5165480
19 changed files with 1470 additions and 460 deletions

3
.vscode/settings.json vendored Normal file
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{
"java.configuration.updateBuildConfiguration": "automatic"
}

1
css/spring.css Normal file

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favicon.ico Normal file

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2
js/highlight/highlight.min.js vendored Normal file

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99
js/highlight/styles/a11y-dark.min.css vendored Normal file
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/* a11y-dark theme */
/* Based on the Tomorrow Night Eighties theme: https://github.com/isagalaev/highlight.js/blob/master/src/styles/tomorrow-night-eighties.css */
/* @author: ericwbailey */
/* Comment */
.hljs-comment,
.hljs-quote {
color: #d4d0ab;
}
/* Red */
.hljs-variable,
.hljs-template-variable,
.hljs-tag,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class,
.hljs-regexp,
.hljs-deletion {
color: #ffa07a;
}
/* Orange */
.hljs-number,
.hljs-built_in,
.hljs-builtin-name,
.hljs-literal,
.hljs-type,
.hljs-params,
.hljs-meta,
.hljs-link {
color: #f5ab35;
}
/* Yellow */
.hljs-attribute {
color: #ffd700;
}
/* Green */
.hljs-string,
.hljs-symbol,
.hljs-bullet,
.hljs-addition {
color: #abe338;
}
/* Blue */
.hljs-title,
.hljs-section {
color: #00e0e0;
}
/* Purple */
.hljs-keyword,
.hljs-selector-tag {
color: #dcc6e0;
}
.hljs {
display: block;
overflow-x: auto;
background: #2b2b2b;
color: #f8f8f2;
padding: 0.5em;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
@media screen and (-ms-high-contrast: active) {
.hljs-addition,
.hljs-attribute,
.hljs-built_in,
.hljs-builtin-name,
.hljs-bullet,
.hljs-comment,
.hljs-link,
.hljs-literal,
.hljs-meta,
.hljs-number,
.hljs-params,
.hljs-string,
.hljs-symbol,
.hljs-type,
.hljs-quote {
color: highlight;
}
.hljs-keyword,
.hljs-selector-tag {
font-weight: bold;
}
}

89
js/highlight/styles/an-old-hope.min.css vendored Normal file
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/*
An Old Hope Star Wars Syntax (c) Gustavo Costa <gusbemacbe@gmail.com>
Original theme - Ocean Dark Theme by https://github.com/gavsiu
Based on Jesse Leite's Atom syntax theme 'An Old Hope' https://github.com/JesseLeite/an-old-hope-syntax-atom
*/
/* Death Star Comment */
.hljs-comment,
.hljs-quote
{
color: #B6B18B;
}
/* Darth Vader */
.hljs-variable,
.hljs-template-variable,
.hljs-tag,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class,
.hljs-regexp,
.hljs-deletion
{
color: #EB3C54;
}
/* Threepio */
.hljs-number,
.hljs-built_in,
.hljs-builtin-name,
.hljs-literal,
.hljs-type,
.hljs-params,
.hljs-meta,
.hljs-link
{
color: #E7CE56;
}
/* Luke Skywalker */
.hljs-attribute
{
color: #EE7C2B;
}
/* Obi Wan Kenobi */
.hljs-string,
.hljs-symbol,
.hljs-bullet,
.hljs-addition
{
color: #4FB4D7;
}
/* Yoda */
.hljs-title,
.hljs-section
{
color: #78BB65;
}
/* Mace Windu */
.hljs-keyword,
.hljs-selector-tag
{
color: #B45EA4;
}
/* Millenium Falcon */
.hljs
{
display: block;
overflow-x: auto;
background: #1C1D21;
color: #c0c5ce;
padding: 0.5em;
}
.hljs-emphasis
{
font-style: italic;
}
.hljs-strong
{
font-weight: bold;
}

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/*
Atom One Dark With support for ReasonML by Gidi Morris, based off work by Daniel Gamage
Original One Dark Syntax theme from https://github.com/atom/one-dark-syntax
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
line-height: 1.3em;
color: #abb2bf;
background: #282c34;
border-radius: 5px;
}
.hljs-keyword, .hljs-operator {
color: #F92672;
}
.hljs-pattern-match {
color: #F92672;
}
.hljs-pattern-match .hljs-constructor {
color: #61aeee;
}
.hljs-function {
color: #61aeee;
}
.hljs-function .hljs-params {
color: #A6E22E;
}
.hljs-function .hljs-params .hljs-typing {
color: #FD971F;
}
.hljs-module-access .hljs-module {
color: #7e57c2;
}
.hljs-constructor {
color: #e2b93d;
}
.hljs-constructor .hljs-string {
color: #9CCC65;
}
.hljs-comment, .hljs-quote {
color: #b18eb1;
font-style: italic;
}
.hljs-doctag, .hljs-formula {
color: #c678dd;
}
.hljs-section, .hljs-name, .hljs-selector-tag, .hljs-deletion, .hljs-subst {
color: #e06c75;
}
.hljs-literal {
color: #56b6c2;
}
.hljs-string, .hljs-regexp, .hljs-addition, .hljs-attribute, .hljs-meta-string {
color: #98c379;
}
.hljs-built_in, .hljs-class .hljs-title {
color: #e6c07b;
}
.hljs-attr, .hljs-variable, .hljs-template-variable, .hljs-type, .hljs-selector-class, .hljs-selector-attr, .hljs-selector-pseudo, .hljs-number {
color: #d19a66;
}
.hljs-symbol, .hljs-bullet, .hljs-link, .hljs-meta, .hljs-selector-id, .hljs-title {
color: #61aeee;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
.hljs-link {
text-decoration: underline;
}

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/*
Atom One Dark by Daniel Gamage
Original One Dark Syntax theme from https://github.com/atom/one-dark-syntax
base: #282c34
mono-1: #abb2bf
mono-2: #818896
mono-3: #5c6370
hue-1: #56b6c2
hue-2: #61aeee
hue-3: #c678dd
hue-4: #98c379
hue-5: #e06c75
hue-5-2: #be5046
hue-6: #d19a66
hue-6-2: #e6c07b
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #abb2bf;
background: #282c34;
}
.hljs-comment,
.hljs-quote {
color: #5c6370;
font-style: italic;
}
.hljs-doctag,
.hljs-keyword,
.hljs-formula {
color: #c678dd;
}
.hljs-section,
.hljs-name,
.hljs-selector-tag,
.hljs-deletion,
.hljs-subst {
color: #e06c75;
}
.hljs-literal {
color: #56b6c2;
}
.hljs-string,
.hljs-regexp,
.hljs-addition,
.hljs-attribute,
.hljs-meta-string {
color: #98c379;
}
.hljs-built_in,
.hljs-class .hljs-title {
color: #e6c07b;
}
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-type,
.hljs-selector-class,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-number {
color: #d19a66;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link,
.hljs-meta,
.hljs-selector-id,
.hljs-title {
color: #61aeee;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
.hljs-link {
text-decoration: underline;
}

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/*
Atom One Light by Daniel Gamage
Original One Light Syntax theme from https://github.com/atom/one-light-syntax
base: #fafafa
mono-1: #383a42
mono-2: #686b77
mono-3: #a0a1a7
hue-1: #0184bb
hue-2: #4078f2
hue-3: #a626a4
hue-4: #50a14f
hue-5: #e45649
hue-5-2: #c91243
hue-6: #986801
hue-6-2: #c18401
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #383a42;
background: #fafafa;
}
.hljs-comment,
.hljs-quote {
color: #a0a1a7;
font-style: italic;
}
.hljs-doctag,
.hljs-keyword,
.hljs-formula {
color: #a626a4;
}
.hljs-section,
.hljs-name,
.hljs-selector-tag,
.hljs-deletion,
.hljs-subst {
color: #e45649;
}
.hljs-literal {
color: #0184bb;
}
.hljs-string,
.hljs-regexp,
.hljs-addition,
.hljs-attribute,
.hljs-meta-string {
color: #50a14f;
}
.hljs-built_in,
.hljs-class .hljs-title {
color: #c18401;
}
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-type,
.hljs-selector-class,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-number {
color: #986801;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link,
.hljs-meta,
.hljs-selector-id,
.hljs-title {
color: #4078f2;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
.hljs-link {
text-decoration: underline;
}

76
js/highlight/styles/dracula.min.css vendored Normal file
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/*
Dracula Theme v1.2.0
https://github.com/zenorocha/dracula-theme
Copyright 2015, All rights reserved
Code licensed under the MIT license
http://zenorocha.mit-license.org
@author Éverton Ribeiro <nuxlli@gmail.com>
@author Zeno Rocha <hi@zenorocha.com>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #282a36;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-section,
.hljs-link {
color: #8be9fd;
}
.hljs-function .hljs-keyword {
color: #ff79c6;
}
.hljs,
.hljs-subst {
color: #f8f8f2;
}
.hljs-string,
.hljs-title,
.hljs-name,
.hljs-type,
.hljs-attribute,
.hljs-symbol,
.hljs-bullet,
.hljs-addition,
.hljs-variable,
.hljs-template-tag,
.hljs-template-variable {
color: #f1fa8c;
}
.hljs-comment,
.hljs-quote,
.hljs-deletion,
.hljs-meta {
color: #6272a4;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-title,
.hljs-section,
.hljs-doctag,
.hljs-type,
.hljs-name,
.hljs-strong {
font-weight: bold;
}
.hljs-emphasis {
font-style: italic;
}

99
js/highlight/styles/github.min.css vendored Normal file
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/*
github.com style (c) Vasily Polovnyov <vast@whiteants.net>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #333;
background: #f8f8f8;
}
.hljs-comment,
.hljs-quote {
color: #998;
font-style: italic;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
color: #333;
font-weight: bold;
}
.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
color: #008080;
}
.hljs-string,
.hljs-doctag {
color: #d14;
}
.hljs-title,
.hljs-section,
.hljs-selector-id {
color: #900;
font-weight: bold;
}
.hljs-subst {
font-weight: normal;
}
.hljs-type,
.hljs-class .hljs-title {
color: #458;
font-weight: bold;
}
.hljs-tag,
.hljs-name,
.hljs-attribute {
color: #000080;
font-weight: normal;
}
.hljs-regexp,
.hljs-link {
color: #009926;
}
.hljs-symbol,
.hljs-bullet {
color: #990073;
}
.hljs-built_in,
.hljs-builtin-name {
color: #0086b3;
}
.hljs-meta {
color: #999;
font-weight: bold;
}
.hljs-deletion {
background: #fdd;
}
.hljs-addition {
background: #dfd;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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/*
Monokai Sublime style. Derived from Monokai by noformnocontent http://nn.mit-license.org/
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #23241f;
}
.hljs,
.hljs-tag,
.hljs-subst {
color: #f8f8f2;
}
.hljs-strong,
.hljs-emphasis {
color: #a8a8a2;
}
.hljs-bullet,
.hljs-quote,
.hljs-number,
.hljs-regexp,
.hljs-literal,
.hljs-link {
color: #ae81ff;
}
.hljs-code,
.hljs-title,
.hljs-section,
.hljs-selector-class {
color: #a6e22e;
}
.hljs-strong {
font-weight: bold;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-name,
.hljs-attr {
color: #f92672;
}
.hljs-symbol,
.hljs-attribute {
color: #66d9ef;
}
.hljs-params,
.hljs-class .hljs-title {
color: #f8f8f2;
}
.hljs-string,
.hljs-type,
.hljs-built_in,
.hljs-builtin-name,
.hljs-selector-id,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-addition,
.hljs-variable,
.hljs-template-variable {
color: #e6db74;
}
.hljs-comment,
.hljs-deletion,
.hljs-meta {
color: #75715e;
}

70
js/highlight/styles/monokai.min.css vendored Normal file
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/*
Monokai style - ported by Luigi Maselli - http://grigio.org
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #272822; color: #ddd;
}
.hljs-tag,
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-strong,
.hljs-name {
color: #f92672;
}
.hljs-code {
color: #66d9ef;
}
.hljs-class .hljs-title {
color: white;
}
.hljs-attribute,
.hljs-symbol,
.hljs-regexp,
.hljs-link {
color: #bf79db;
}
.hljs-string,
.hljs-bullet,
.hljs-subst,
.hljs-title,
.hljs-section,
.hljs-emphasis,
.hljs-type,
.hljs-built_in,
.hljs-builtin-name,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-addition,
.hljs-variable,
.hljs-template-tag,
.hljs-template-variable {
color: #a6e22e;
}
.hljs-comment,
.hljs-quote,
.hljs-deletion,
.hljs-meta {
color: #75715e;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-doctag,
.hljs-title,
.hljs-section,
.hljs-type,
.hljs-selector-id {
font-weight: bold;
}

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/*
Orginal Style from ethanschoonover.com/solarized (c) Jeremy Hull <sourdrums@gmail.com>
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #fdf6e3;
color: #657b83;
}
.hljs-comment,
.hljs-quote {
color: #93a1a1;
}
/* Solarized Green */
.hljs-keyword,
.hljs-selector-tag,
.hljs-addition {
color: #859900;
}
/* Solarized Cyan */
.hljs-number,
.hljs-string,
.hljs-meta .hljs-meta-string,
.hljs-literal,
.hljs-doctag,
.hljs-regexp {
color: #2aa198;
}
/* Solarized Blue */
.hljs-title,
.hljs-section,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class {
color: #268bd2;
}
/* Solarized Yellow */
.hljs-attribute,
.hljs-attr,
.hljs-variable,
.hljs-template-variable,
.hljs-class .hljs-title,
.hljs-type {
color: #b58900;
}
/* Solarized Orange */
.hljs-symbol,
.hljs-bullet,
.hljs-subst,
.hljs-meta,
.hljs-meta .hljs-keyword,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-link {
color: #cb4b16;
}
/* Solarized Red */
.hljs-built_in,
.hljs-deletion {
color: #dc322f;
}
.hljs-formula {
background: #eee8d5;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

80
js/highlight/styles/zenburn.min.css vendored Normal file
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/*
Zenburn style from voldmar.ru (c) Vladimir Epifanov <voldmar@voldmar.ru>
based on dark.css by Ivan Sagalaev
*/
.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #3f3f3f;
color: #dcdcdc;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-tag {
color: #e3ceab;
}
.hljs-template-tag {
color: #dcdcdc;
}
.hljs-number {
color: #8cd0d3;
}
.hljs-variable,
.hljs-template-variable,
.hljs-attribute {
color: #efdcbc;
}
.hljs-literal {
color: #efefaf;
}
.hljs-subst {
color: #8f8f8f;
}
.hljs-title,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class,
.hljs-section,
.hljs-type {
color: #efef8f;
}
.hljs-symbol,
.hljs-bullet,
.hljs-link {
color: #dca3a3;
}
.hljs-deletion,
.hljs-string,
.hljs-built_in,
.hljs-builtin-name {
color: #cc9393;
}
.hljs-addition,
.hljs-comment,
.hljs-quote,
.hljs-meta {
color: #7f9f7f;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}

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js/toc.js Normal file
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var toctitle = document.getElementById('toctitle');
var path = window.location.pathname;
if (toctitle != null) {
var oldtoc = toctitle.nextElementSibling;
var newtoc = document.createElement('div');
newtoc.setAttribute('id', 'tocbot');
newtoc.setAttribute('class', 'js-toc desktop-toc');
oldtoc.setAttribute('class', 'mobile-toc');
oldtoc.parentNode.appendChild(newtoc);
tocbot.init({
contentSelector: '#content',
headingSelector: 'h1, h2, h3, h4, h5',
positionFixedSelector: 'body',
fixedSidebarOffset: 90,
smoothScroll: false
});
if (!path.endsWith("index.html") && !path.endsWith("/")) {
var link = document.createElement("a");
link.setAttribute("href", "index.html");
link.innerHTML = "<span><i class=\"fa fa-chevron-left\" aria-hidden=\"true\"></i></span> Back to index";
var block = document.createElement("div");
block.setAttribute('class', 'back-action');
block.appendChild(link);
var toc = document.getElementById('toc');
var next = document.getElementById('toctitle').nextElementSibling;
toc.insertBefore(block, next);
}
}
var headerHtml = '<div id="header-spring">\n' +
'<h1>\n' +
'<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0" y="0"\n' +
'viewBox="0 0 245.8 45.3" style="enable-background:new 0 0 245.8 45.3;" xml:space="preserve">\n' +
'<g id="logos">\n' +
'<g>\n' +
'<path class="st0" d="M39.4,3.7c-0.6,1.5-1.4,2.8-2.3,4c-3.9-4-9.3-6.4-15.2-6.4c-11.7,0-21.3,9.5-21.3,21.3\n' +
'c0,6.2,2.6,11.7,6.8,15.6l0.8,0.7c3.7,3.1,8.5,5,13.7,5c11.2,0,20.4-8.7,21.2-19.8C43.7,18.7,42.1,11.8,39.4,3.7z M10.5,38.3\n' +
'c-0.6,0.8-1.8,0.9-2.6,0.3C7.1,37.9,7,36.8,7.6,36c0.6-0.8,1.8-0.9,2.6-0.3C11,36.4,11.1,37.5,10.5,38.3z M39.3,31.9\n' +
'c-5.2,7-16.5,4.6-23.6,5c0,0-1.3,0.1-2.6,0.3c0,0,0.5-0.2,1.1-0.4c5-1.7,7.4-2.1,10.5-3.7c5.8-3,11.5-9.4,12.7-16.1\n' +
'c-2.2,6.4-8.9,12-14.9,14.2c-4.2,1.5-11.7,3-11.7,3c0,0-0.3-0.2-0.3-0.2c-5.1-2.5-5.3-13.6,4-17.1c4.1-1.6,8-0.7,12.4-1.8\n' +
'C31.6,14.1,37,10.6,39.2,6C41.7,13.3,44.7,24.8,39.3,31.9z"/>\n' +
'<g>\n' +
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<title>Spring Cloud Bus</title>
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@@ -504,47 +83,414 @@ $(addBlockSwitches);
</script>
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<pre>:linkcss:
:stylesdir: css
:stylesheet: manual-singlepage.css</pre>
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<div class="content">
<pre>= {docs-main}</pre>
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<pre>{spring-cloud-version}</pre>
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<div class="literalblock">
<div class="content">
<pre>== Pick The Documentation Option</pre>
</div>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="single/spring-cloud-bus.html">Single
HTML</a></p>
<h1>Spring Cloud Bus</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_quick_start">Quick Start</a></li>
<li><a href="#_bus_endpoints">Bus Endpoints</a>
<ul class="sectlevel2">
<li><a href="#_bus_refresh_endpoint">Bus Refresh Endpoint</a></li>
<li><a href="#_bus_env_endpoint">Bus Env Endpoint</a></li>
</ul>
</li>
<li>
<p><a href="multi/multi_spring-cloud-bus.html">Multi
HTML</a></p>
<li><a href="#_addressing_an_instance">Addressing an Instance</a></li>
<li><a href="#_addressing_all_instances_of_a_service">Addressing All Instances of a Service</a></li>
<li><a href="#_service_id_must_be_unique">Service ID Must Be Unique</a></li>
<li><a href="#_customizing_the_message_broker">Customizing the Message Broker</a></li>
<li><a href="#_tracing_bus_events">Tracing Bus Events</a></li>
<li><a href="#_broadcasting_your_own_events">Broadcasting Your Own Events</a>
<ul class="sectlevel2">
<li><a href="#_registering_events_in_custom_packages">Registering events in custom packages</a></li>
</ul>
</li>
</ul>
</div>
</div>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prettify/r298/prettify.min.css">
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<script>prettyPrint()</script>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Bus links the nodes of a distributed system with a lightweight message
broker. This broker can then be used to broadcast state changes (such as configuration
changes) or other management instructions. A key idea is that the bus is like a
distributed actuator for a Spring Boot application that is scaled out. However, it can
also be used as a communication channel between apps. This project provides starters for
either an AMQP broker or Kafka as the transport.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Spring Cloud is released under the non-restrictive Apache 2.0 license. If you would like to contribute to this section of the documentation or if you find an error, please find the source code and issue trackers in the project at <a href="https://github.com/spring-cloud/spring-cloud-config/tree/master/docs/src/main/asciidoc">github</a>.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_quick_start"><a class="link" href="#_quick_start">Quick Start</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Bus works by adding Spring Boot autconfiguration if it detects itself on the
classpath. To enable the bus, add <code>spring-cloud-starter-bus-amqp</code> or
<code>spring-cloud-starter-bus-kafka</code> to your dependency management. Spring Cloud takes care of
the rest. Make sure the broker (RabbitMQ or Kafka) is available and configured. When
running on localhost, you need not do anything. If you run remotely, use Spring Cloud
Connectors or Spring Boot conventions to define the broker credentials, as shown in the
following example for Rabbit:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre>spring:
rabbitmq:
host: mybroker.com
port: 5672
username: user
password: secret</pre>
</div>
</div>
<div class="paragraph">
<p>The bus currently supports sending messages to all nodes listening or all nodes for a
particular service (as defined by Eureka). The <code>/bus/*</code> actuator namespace has some HTTP
endpoints. Currently, two are implemented. The first, <code>/bus/env</code>, sends key/value pairs to
update each node&#8217;s Spring Environment. The second, <code>/bus/refresh</code>, reloads each
application&#8217;s configuration, as though they had all been pinged on their <code>/refresh</code>
endpoint.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The Spring Cloud Bus starters cover Rabbit and Kafka, because those are the two most
common implementations. However, Spring Cloud Stream is quite flexible, and the binder
works with <code>spring-cloud-bus</code>.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_bus_endpoints"><a class="link" href="#_bus_endpoints">Bus Endpoints</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Bus provides two endpoints, <code>/actuator/bus-refresh</code> and <code>/actuator/bus-env</code>
that correspond to individual actuator endpoints in Spring Cloud Commons,
<code>/actuator/refresh</code> and <code>/actuator/env</code> respectively.</p>
</div>
<div class="sect2">
<h3 id="_bus_refresh_endpoint"><a class="link" href="#_bus_refresh_endpoint">Bus Refresh Endpoint</a></h3>
<div class="paragraph">
<p>The <code>/actuator/bus-refresh</code> endpoint clears the <code>RefreshScope</code> cache and rebinds
<code>@ConfigurationProperties</code>. See the <a href="#refresh-scope">Refresh Scope</a> documentation for
more information.</p>
</div>
<div class="paragraph">
<p>To expose the <code>/actuator/bus-refresh</code> endpoint, you need to add following configuration to your
application:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-properties hljs" data-lang="properties">management.endpoints.web.exposure.include=bus-refresh</code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_bus_env_endpoint"><a class="link" href="#_bus_env_endpoint">Bus Env Endpoint</a></h3>
<div class="paragraph">
<p>The <code>/actuator/bus-env</code> endpoint updates each instances environment with the specified
key/value pair across multiple instances.</p>
</div>
<div class="paragraph">
<p>To expose the <code>/actuator/bus-env</code> endpoint, you need to add following configuration to your
application:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-properties hljs" data-lang="properties">management.endpoints.web.exposure.include=bus-env</code></pre>
</div>
</div>
<div class="paragraph">
<p>The <code>/actuator/bus-env</code> endpoint accepts <code>POST</code> requests with the following shape:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-json hljs" data-lang="json">{
"name": "key1",
"value": "value1"
}</code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_addressing_an_instance"><a class="link" href="#_addressing_an_instance">Addressing an Instance</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Each instance of the application has a service ID, whose value can be set with
<code>spring.cloud.bus.id</code> and whose value is expected to be a colon-separated list of
identifiers, in order from least specific to most specific. The default value is
constructed from the environment as a combination of the <code>spring.application.name</code> and
<code>server.port</code> (or <code>spring.application.index</code>, if set). The default value of the ID is
constructed in the form of <code>app:index:id</code>, where:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>app</code> is the <code>vcap.application.name</code>, if it exists, or <code>spring.application.name</code></p>
</li>
<li>
<p><code>index</code> is the <code>vcap.application.instance_index</code>, if it exists,
<code>spring.application.index</code>, <code>local.server.port</code>, <code>server.port</code>, or <code>0</code> (in that order).</p>
</li>
<li>
<p><code>id</code> is the <code>vcap.application.instance_id</code>, if it exists, or a random value.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>The HTTP endpoints accept a &#8220;destination&#8221; path parameter, such as
<code>/bus-refresh/customers:9000</code>, where <code>destination</code> is a service ID. If the ID
is owned by an instance on the bus, it processes the message, and all other instances
ignore it.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_addressing_all_instances_of_a_service"><a class="link" href="#_addressing_all_instances_of_a_service">Addressing All Instances of a Service</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>The &#8220;destination&#8221; parameter is used in a Spring <code>PathMatcher</code> (with the path separator
as a colon&#8201;&#8212;&#8201;<code>:</code>) to determine if an instance processes the message. Using the example
from earlier, <code>/bus-env/customers:**</code> targets all instances of the
&#8220;customers&#8221; service regardless of the rest of the service ID.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_service_id_must_be_unique"><a class="link" href="#_service_id_must_be_unique">Service ID Must Be Unique</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>The bus tries twice to eliminate processing an event&#8201;&#8212;&#8201;once from the original
<code>ApplicationEvent</code> and once from the queue. To do so, it checks the sending service ID
against the current service ID. If multiple instances of a service have the same ID,
events are not processed. When running on a local machine, each service is on a different
port, and that port is part of the ID. Cloud Foundry supplies an index to differentiate.
To ensure that the ID is unique outside Cloud Foundry, set <code>spring.application.index</code> to
something unique for each instance of a service.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_customizing_the_message_broker"><a class="link" href="#_customizing_the_message_broker">Customizing the Message Broker</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Bus uses <a href="https://cloud.spring.io/spring-cloud-stream">Spring Cloud Stream</a> to
broadcast the messages. So, to get messages to flow, you need only include the binder
implementation of your choice in the classpath. There are convenient starters for the bus
with AMQP (RabbitMQ) and Kafka (<code>spring-cloud-starter-bus-[amqp|kafka]</code>). Generally
speaking, Spring Cloud Stream relies on Spring Boot autoconfiguration conventions for
configuring middleware. For instance, the AMQP broker address can be changed with
<code>spring.rabbitmq.*</code> configuration properties. Spring Cloud Bus has a handful of
native configuration properties in <code>spring.cloud.bus.*</code> (for example,
<code>spring.cloud.bus.destination</code> is the name of the topic to use as the external
middleware). Normally, the defaults suffice.</p>
</div>
<div class="paragraph">
<p>To learn more about how to customize the message broker settings, consult the Spring Cloud
Stream documentation.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_tracing_bus_events"><a class="link" href="#_tracing_bus_events">Tracing Bus Events</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Bus events (subclasses of <code>RemoteApplicationEvent</code>) can be traced by setting
<code>spring.cloud.bus.trace.enabled=true</code>. If you do so, the Spring Boot <code>TraceRepository</code>
(if it is present) shows each event sent and all the acks from each service instance. The
following example comes from the <code>/trace</code> endpoint:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-json hljs" data-lang="json">{
"timestamp": "2015-11-26T10:24:44.411+0000",
"info": {
"signal": "spring.cloud.bus.ack",
"type": "RefreshRemoteApplicationEvent",
"id": "c4d374b7-58ea-4928-a312-31984def293b",
"origin": "stores:8081",
"destination": "*:**"
}
},
{
"timestamp": "2015-11-26T10:24:41.864+0000",
"info": {
"signal": "spring.cloud.bus.sent",
"type": "RefreshRemoteApplicationEvent",
"id": "c4d374b7-58ea-4928-a312-31984def293b",
"origin": "customers:9000",
"destination": "*:**"
}
},
{
"timestamp": "2015-11-26T10:24:41.862+0000",
"info": {
"signal": "spring.cloud.bus.ack",
"type": "RefreshRemoteApplicationEvent",
"id": "c4d374b7-58ea-4928-a312-31984def293b",
"origin": "customers:9000",
"destination": "*:**"
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>The preceding trace shows that a <code>RefreshRemoteApplicationEvent</code> was sent from
<code>customers:9000</code>, broadcast to all services, and received (acked) by <code>customers:9000</code> and
<code>stores:8081</code>.</p>
</div>
<div class="paragraph">
<p>To handle the ack signals yourself, you could add an <code>@EventListener</code> for the
<code>AckRemoteApplicationEvent</code> and <code>SentApplicationEvent</code> types to your app (and enable
tracing). Alternatively, you could tap into the <code>TraceRepository</code> and mine the data from
there.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Any Bus application can trace acks. However, sometimes, it is
useful to do this in a central service that can do more complex
queries on the data or forward it to a specialized tracing service.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_broadcasting_your_own_events"><a class="link" href="#_broadcasting_your_own_events">Broadcasting Your Own Events</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Bus can carry any event of type <code>RemoteApplicationEvent</code>. The default transport is
JSON, and the deserializer needs to know which types are going to be used ahead of time.
To register a new type, you must put it in a subpackage of
<code>org.springframework.cloud.bus.event</code>.</p>
</div>
<div class="paragraph">
<p>To customise the event name, you can use <code>@JsonTypeName</code> on your custom class or rely on
the default strategy, which is to use the simple name of the class.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Both the producer and the consumer need access to the class definition.
</td>
</tr>
</table>
</div>
<div class="sect2">
<h3 id="_registering_events_in_custom_packages"><a class="link" href="#_registering_events_in_custom_packages">Registering events in custom packages</a></h3>
<div class="paragraph">
<p>If you cannot or do not want to use a subpackage of <code>org.springframework.cloud.bus.event</code>
for your custom events, you must specify which packages to scan for events of type
<code>RemoteApplicationEvent</code> by using the <code>@RemoteApplicationEventScan</code> annotation. Packages
specified with <code>@RemoteApplicationEventScan</code> include subpackages.</p>
</div>
<div class="paragraph">
<p>For example, consider the following custom event, called <code>MyEvent</code>:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">package com.acme;
public class MyEvent extends RemoteApplicationEvent {
...
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>You can register that event with the deserializer in the following way:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">package com.acme;
@Configuration
@RemoteApplicationEventScan
public class BusConfiguration {
...
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Without specifying a value, the package of the class where <code>@RemoteApplicationEventScan</code>
is used is registered. In this example, <code>com.acme</code> is registered by using the package of
<code>BusConfiguration</code>.</p>
</div>
<div class="paragraph">
<p>You can also explicitly specify the packages to scan by using the <code>value</code>, <code>basePackages</code>
or <code>basePackageClasses</code> properties on <code>@RemoteApplicationEventScan</code>, as shown in the
following example:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">package com.acme;
@Configuration
//@RemoteApplicationEventScan({"com.acme", "foo.bar"})
//@RemoteApplicationEventScan(basePackages = {"com.acme", "foo.bar", "fizz.buzz"})
@RemoteApplicationEventScan(basePackageClasses = BusConfiguration.class)
public class BusConfiguration {
...
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>All of the preceding examples of <code>@RemoteApplicationEventScan</code> are equivalent, in that the
<code>com.acme</code> package is registered by explicitly specifying the packages on
<code>@RemoteApplicationEventScan</code>.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
You can specify multiple base packages to scan.
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
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