Sync docs from master to gh-pages
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Ben Klein
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cloudfoundry-connector.html
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cloudfoundry-connector.html
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<!DOCTYPE html>
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<title>Spring Cloud Cloud Foundry Connector</title>
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|
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|
||||
</head>
|
||||
<body class="book">
|
||||
<div id="header">
|
||||
<h1>Spring Cloud Cloud Foundry Connector</h1>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div id="preamble">
|
||||
<div class="sectionbody">
|
||||
<div id="spring-cloud-connectors-install" class="paragraph">
|
||||
<p>This connector will discover services bound to an application running in Cloud Foundry. It currently knows about:</p>
|
||||
</div>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p>PostgreSQL</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>MySQL</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Oracle</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Redis</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>MongoDB</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>RabbitMQ</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>SMTP gateway</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>application monitoring (New Relic)</p>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Since Cloud Foundry enumerates each service in a consistent format, Spring Cloud does not care which service provider is providing it.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_supporting_new_service_types">Supporting new service types</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>Extend <code>CloudFoundryServiceInfoCreator</code> with a creator for your service’s <code>ServiceInfo</code> class.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Add the fully-qualified class name for your creator to</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>META-INF/service/org.springframework.cloud.cloudfoundry.CloudFoundryServiceInfoCreator</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2015-07-30 08:41:48 CDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
496
heroku-connector.html
Normal file
496
heroku-connector.html
Normal file
@@ -0,0 +1,496 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
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||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
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<meta name="generator" content="Asciidoctor 1.5.0">
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<title>Spring Cloud Heroku Connector</title>
|
||||
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic|Noto+Serif:400,400italic,700,700italic|Droid+Sans+Mono:400">
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<style>
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body{margin:0}
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a{background:transparent}
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a:focus{outline:thin dotted}
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sup{top:-.5em}
|
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sub{bottom:-.25em}
|
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svg:not(:root){overflow:hidden}
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figure{margin:0}
|
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button,input{line-height:normal}
|
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button,select{text-transform:none}
|
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button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer}
|
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button[disabled],html input[disabled]{cursor:default}
|
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|
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a:hover{cursor:pointer}
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|
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ul.square{list-style-type:square}
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abbr{text-transform:none}
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table tr th,table tr td{padding:.5625em .625em;font-size:inherit;color:rgba(0,0,0,.8)}
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table tr.even,table tr.alt,table tr:nth-of-type(even){background:#f8f8f7}
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kbd{display:inline-block;color:rgba(0,0,0,.8);font-size:.75em;line-height:1.4;background-color:#f7f7f7;border:1px solid #ccc;-webkit-border-radius:3px;border-radius:3px;-webkit-box-shadow:0 1px 0 rgba(0,0,0,.2),0 0 0 .1em white inset;box-shadow:0 1px 0 rgba(0,0,0,.2),0 0 0 .1em #fff inset;margin:-.15em .15em 0 .15em;padding:.2em .6em .2em .5em;vertical-align:middle;white-space:nowrap}
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.keyseq kbd:first-child{margin-left:0}
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.keyseq kbd:last-child{margin-right:0}
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b.button:before,b.button:after{position:relative;top:-1px;font-weight:400}
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b.button:before{content:"[";padding:0 3px 0 2px}
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p a>code:hover{color:rgba(0,0,0,.9)}
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|
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#header:before,#header:after,#content:before,#content:after,#footnotes:before,#footnotes:after,#footer:before,#footer:after{content:" ";display:table}
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#toc{border-bottom:1px solid #efefed;padding-bottom:.5em}
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body.toc2.toc-right{padding-left:0;padding-right:15em}
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body.toc2.toc-right #toc.toc2{border-right-width:0;border-left:1px solid #efefed;left:auto;right:0}}@media only screen and (min-width:1280px){body.toc2{padding-left:20em;padding-right:0}
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#toc.toc2{width:20em}
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#content #toc>:first-child{margin-top:0}
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#content h1:hover>a.anchor,#content h1>a.anchor:hover,h2:hover>a.anchor,h2>a.anchor:hover,h3:hover>a.anchor,#toctitle:hover>a.anchor,.sidebarblock>.content>.title:hover>a.anchor,h3>a.anchor:hover,#toctitle>a.anchor:hover,.sidebarblock>.content>.title>a.anchor:hover,h4:hover>a.anchor,h4>a.anchor:hover,h5:hover>a.anchor,h5>a.anchor:hover,h6:hover>a.anchor,h6>a.anchor:hover{visibility:visible}
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#content h1>a.link,h2>a.link,h3>a.link,#toctitle>a.link,.sidebarblock>.content>.title>a.link,h4>a.link,h5>a.link,h6>a.link{color:#ba3925;text-decoration:none}
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table.tableblock>caption.title{white-space:nowrap;overflow:visible;max-width:0}
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table.tableblock #preamble>.sectionbody>.paragraph:first-of-type p{font-size:inherit}
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.exampleblock>.content{border-style:solid;border-width:1px;border-color:#e6e6e6;margin-bottom:1.25em;padding:1.25em;background:#fff;-webkit-border-radius:4px;border-radius:4px}
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.exampleblock>.content>:first-child{margin-top:0}
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.exampleblock>.content>:last-child{margin-bottom:0}
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.sidebarblock{border-style:solid;border-width:1px;border-color:#e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;-webkit-border-radius:4px;border-radius:4px}
|
||||
.sidebarblock>:first-child{margin-top:0}
|
||||
.sidebarblock>:last-child{margin-bottom:0}
|
||||
.sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
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.literalblock pre,.listingblock pre:not(.highlight),.listingblock pre[class="highlight"],.listingblock pre[class^="highlight "],.listingblock pre.CodeRay,.listingblock pre.prettyprint{background:#f7f7f8}
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.sidebarblock .literalblock pre,.sidebarblock .listingblock pre:not(.highlight),.sidebarblock .listingblock pre[class="highlight"],.sidebarblock .listingblock pre[class^="highlight "],.sidebarblock .listingblock pre.CodeRay,.sidebarblock .listingblock pre.prettyprint{background:#f2f1f1}
|
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.literalblock pre,.literalblock pre[class],.listingblock pre,.listingblock pre[class]{-webkit-border-radius:4px;border-radius:4px;word-wrap:break-word;padding:1em;font-size:.8125em}
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.listingblock pre.prettyprint{border-width:0}
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.listingblock:hover code[data-lang]:before{display:block}
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|
||||
<body class="book">
|
||||
<div id="header">
|
||||
<h1>Spring Cloud Heroku Connector</h1>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div id="preamble">
|
||||
<div class="sectionbody">
|
||||
<div id="spring-cloud-connectors-install" class="paragraph">
|
||||
<p>This connector will discover services bound to an application running in Heroku. It currently knows about:</p>
|
||||
</div>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p>PostgreSQL (Heroku)</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>MySQL (ClearDB)</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Redis (RedisToGo, Redis Cloud, RedisGreen, openredis)</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>MongoDB (MongoLab, MongoHQ, MongoSoup)</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>RabbitMQ (CloudAMQP)</p>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Pull requests for adding additional services are welcome.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_supporting_additional_providers_for_existing_service_types">Supporting additional providers for existing service types</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>To add support for discovering a new provider for a service already listed above, add the provider’s environment prefix to the list in <code>getEnvPrefixes()</code> on the <code>ServiceInfoCreator</code> class.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_supporting_new_service_types">Supporting new service types</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>Extend <code>HerokuServiceInfoCreator</code> with a creator for your service’s <code>ServiceInfo</code> class.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Add the fully-qualified class name for your creator to</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>META-INF/service/org.springframework.cloud.heroku.HerokuServiceInfoCreator</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_limitations">Limitations</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>Unlike CloudFoundry, Heroku exposes very little information about the app that is retrievable from within a running instance. For example, there is no good way to find the name of the application. Therefore, if an app desires such info, it needs to make it available through environment variables.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>To have sensible app name available through <code>ApplicationInstanceInfo</code>, set the <code>SPRING_CLOUD_APP_NAME</code> environment variable</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>heroku config:add SPRING_CLOUD_APP_NAME=myappname --app myappname</pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>If this env variable is not set, the app name will be set to <code><unknown></code>.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2015-07-30 08:44:05 CDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
536
localconfig-connector.html
Normal file
536
localconfig-connector.html
Normal file
@@ -0,0 +1,536 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
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|
||||
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|
||||
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<meta name="generator" content="Asciidoctor 1.5.0">
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<title>Spring Cloud local-configuration Connector</title>
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#toc{border-bottom:1px solid #efefed;padding-bottom:.5em}
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body.toc2{padding-left:15em;padding-right:0}
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|
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body.toc2.toc-right{padding-left:0;padding-right:15em}
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body.toc2.toc-right #toc.toc2{border-right-width:0;border-left:1px solid #efefed;left:auto;right:0}}@media only screen and (min-width:1280px){body.toc2{padding-left:20em;padding-right:0}
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|
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#content #toc>:first-child{margin-top:0}
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.exampleblock>.content>:last-child{margin-bottom:0}
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.sidebarblock{border-style:solid;border-width:1px;border-color:#e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;-webkit-border-radius:4px;border-radius:4px}
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.sidebarblock>:first-child{margin-top:0}
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.sidebarblock>:last-child{margin-bottom:0}
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.sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
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.literalblock pre,.listingblock pre:not(.highlight),.listingblock pre[class="highlight"],.listingblock pre[class^="highlight "],.listingblock pre.CodeRay,.listingblock pre.prettyprint{background:#f7f7f8}
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.sidebarblock .literalblock pre,.sidebarblock .listingblock pre:not(.highlight),.sidebarblock .listingblock pre[class="highlight"],.sidebarblock .listingblock pre[class^="highlight "],.sidebarblock .listingblock pre.CodeRay,.sidebarblock .listingblock pre.prettyprint{background:#f2f1f1}
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.literalblock pre,.literalblock pre[class],.listingblock pre,.listingblock pre[class]{-webkit-border-radius:4px;border-radius:4px;word-wrap:break-word;padding:1em;font-size:.8125em}
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.listingblock>.content{position:relative}
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|
||||
</head>
|
||||
<body class="book">
|
||||
<div id="header">
|
||||
<h1>Spring Cloud local-configuration Connector</h1>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div id="preamble">
|
||||
<div class="sectionbody">
|
||||
<div id="spring-cloud-connectors-install" class="paragraph">
|
||||
<p>This connector provides the ability to configure Spring Cloud services locally for development or testing. The current implementation reads from Java properties only. Pull requests for also inspecting environment variables are welcome.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_quick_start">Quick start</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>Since service URIs contain passwords and should not be stored in code, this connector does not attempt to read service definitions out of the classpath. You can provide service definitions as system properties</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>java -Dspring.cloud.database='mysql://user:pass@host:1234/dbname' -jar my-app.jar</pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>and from a configuration properties file either by setting the <code>spring.cloud.propertiesFile</code> system property</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>java -Dspring.cloud.propertiesFile=/path/to/spring-cloud.properties -jar my-app.jar</pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>or by providing a <strong>bootstrap</strong> properties file on the runtime classpath named <code>spring-cloud-bootstrap.properties</code>. This file will be inspected for only the property named <code>spring.cloud.propertiesFile</code>, and its value will be interpolated from the system properties.</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-properties" data-lang="properties">spring.cloud.propertiesFile: ${user.home}/.config/myApp/spring-cloud.properties</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>The system properties or the configuration properties file should contain an application ID and the desired services in this format:</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-properties" data-lang="properties">spring.cloud.appId: myApp
|
||||
; spring.cloud.{id}: URI
|
||||
spring.cloud.database: mysql://user:pass@host:1234/dbname</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Service type is determined by the URI scheme. The connector will activate if it finds a property (in the system properties or the configuration properties file) named <code>spring.cloud.appId</code>.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_property_sources">Property sources</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>This connector first attempts to read the system properties generally and a system property named <code>spring.cloud.propertiesFile</code> specifically. If the system properties are not readable (the security manager denies <code>checkPropertiesAccess</code>), then they will be treated as empty. If a system property named <code>spring.cloud.propertiesFile</code> is found, that file will be loaded as a property list.</p>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_providing_a_bootstrap_properties_file">Providing a bootstrap properties file</h3>
|
||||
<div class="paragraph">
|
||||
<p>To avoid having to manually configure run configurations or test runners with the path to the configuration properties file, the connector supports reading a templated filename out of the runtime classpath. This file must be named <code>spring-cloud-bootstrap.properties</code> and located at the classpath root, and for security the connector will not attempt to read any service URIs out of it. If the connector does find the file, it will read the property <code>spring.cloud.propertiesFile</code> and substitute the pattern <code>${system.property}</code> with the appropriate value from the system properties. The most useful option is generally <code>${user.home}</code>.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>A configuration properties file specified in the system properties will override any bootstrap file that may be available on the classpath.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_property_precedence">Property precedence</h3>
|
||||
<div class="paragraph">
|
||||
<p>To provide the maximum configuration flexibility, the connector will override any properties (both application ID and service definitions) specified in the file at <code>spring.cloud.propertiesFile</code> with system properties defined at runtime. The connector will log a message at <code>WARN</code> if you override a service ID.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_activating_the_connector">Activating the connector</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>The Spring Cloud core expects exactly one cloud connector match the runtime environment. This connector identifies the "local cloud" by the presence of a property named <code>spring.cloud.appId</code> in a configuration properties file or the system properties, which will be used in the <code>ApplicationInstanceInfo</code>.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_service_definitions">Service definitions</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>If the connector is activated, it will iterate through all the available properties for keys matching the pattern <code>spring.cloud.{serviceId}</code>. Each value is interpreted as a URI to the services, and the type of service is determined from the scheme. All of the standard `UriBasedServiceInfo`s are supported.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_supporting_additional_services">Supporting additional services</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>Extend <code>LocalConfigServiceInfoCreator</code> with a creator for your service’s <code>ServiceInfo</code> class.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Add the fully-qualified class name for your creator to</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>META-INF/service/org.springframework.cloud.localconfig.LocalConfigServiceInfoCreator</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_instance_id">Instance ID</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>This connector will create a UUID for use as the instance ID, as Java does not provide any portable mechanism for reliably determining hostnames or PIDs.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2015-07-30 08:54:03 CDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
568
spring-cloud-connectors.html
Normal file
568
spring-cloud-connectors.html
Normal file
@@ -0,0 +1,568 @@
|
||||
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||||
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<body class="book">
|
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<div id="header">
|
||||
<h1>Spring Cloud Connectors</h1>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div id="preamble">
|
||||
<div class="sectionbody">
|
||||
<div id="spring-cloud-connectors-install" class="paragraph">
|
||||
<p>Spring Cloud Connectors provides a simple abstraction for JVM-based applications running on cloud platforms to discover bound services and deployment information at runtime and provides support for registering discovered services as Spring beans. It is based on a plugin model so that the identical compiled application can be deployed locally or on multiple clouds, and it supports custom service definitions through Java SPI.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Spring Cloud Connectors provides out-of-the-box support for discovering common services on Heroku and Cloud Foundry clouds as well as a properties-based configuration for development and testing.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>The core concepts used in this project are:</p>
|
||||
</div>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p><strong>Cloud connector</strong>: An interface specific to a cloud platform that identifies the presence of the platform and discovers any services bound to the application deployment.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Service connector</strong>: An object, such as a <code>javax.sql.DataSource</code>, that represents a runtime connection to a service.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Service information</strong>: Information about the underlying service such as host, port, and credentials.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Application information</strong>: Information about the application and the particular running instance.</p>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>The project contains three major submodules:</p>
|
||||
</div>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p><a href="spring-cloud-core.html"><strong>core</strong></a>: The core library, cloud- and Spring-agnostic, that provides a programmatic entry point for developers who prefer to access cloud services and application information manually. It also provides basic service definitions for several common services (databases, message queues) and an SPI-based extension mechanism to contribute cloud and service connectors.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><a href="spring-cloud-spring-service-connector.html"><strong>spring-service-connector</strong></a>: A Spring Library that exposes application and cloud information and discovered services as Spring beans of the appropriate type. For example, SQL services will be exposed as <code>javax.sql.DataSource</code> s with optional connection pooling.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Cloud connectors:</p>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p><a href="cloudfoundry-connector.html"><strong>cloudfoundry-connector</strong></a>: Connector for Cloud Foundry.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><a href="heroku-connector.html"><strong>heroku-connector</strong></a>: Connector for Heroku.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><a href="localconfig-connector.html"><strong>localconfig-connector</strong></a>: Properties-based connector for manually providing configuration information for development or testing. Allows the use of the same Spring Cloud configuration wiring in all stages of application deployment.</p>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_getting_started">Getting Started</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>The following examples are written for Maven; simply include the appropriate dependencies for your build system.</p>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_including_cloud_connectors">Including cloud connectors</h3>
|
||||
<div class="paragraph">
|
||||
<p>Include the connector for each cloud platform you want to be discoverable. Including multiple connectors is perfectly fine; each connector will determine whether it should be active in a particular environment.</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-xml" data-lang="xml"><!-- to use Spring Cloud Connectors for development -->
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-localconfig-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency>
|
||||
|
||||
<!-- If you intend to deploy the app to Cloud Foundry -->
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-cloudfoundry-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency>
|
||||
|
||||
<!-- If you intend to deploy the app to Heroku -->
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-heroku-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency></code></pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_spring_applications">Spring applications</h3>
|
||||
<div class="paragraph">
|
||||
<p>Add the spring-service-connector in addition to your cloud connectors:</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-xml" data-lang="xml"><dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-spring-service-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency>
|
||||
|
||||
<!-- to use Spring Cloud for development -->
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-localconfig-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency>
|
||||
|
||||
<!-- If you intend to deploy the app to Cloud Foundry -->
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-cloudfoundry-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency>
|
||||
|
||||
<!-- If you intend to deploy the app to Heroku -->
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-heroku-connector</artifactId>
|
||||
<version>1.1.1.RELEASE</version>
|
||||
</dependency></code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Then follow the instructions on Spring configuration using Java configuration or the <code><cloud></code> namespace.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_non_spring_applications">Non-Spring applications</h3>
|
||||
<div class="paragraph">
|
||||
<p>The <code>spring-cloud-core</code> dependency is included by each cloud connector, so simply include the connectors for the platforms you want.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Then follow the instructions on using the Spring Cloud Connectors API.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2015-07-30 08:59:19 CDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
585
spring-cloud-core.html
Normal file
585
spring-cloud-core.html
Normal file
@@ -0,0 +1,585 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
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|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<meta name="generator" content="Asciidoctor 1.5.0">
|
||||
<title>Spring Cloud Core</title>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
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|
||||
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|
||||
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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|
||||
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|
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|
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|
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|
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|
||||
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|
||||
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
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|
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|
||||
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|
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|
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||||
a[href^="http:"]:not(.bare):after,a[href^="https:"]:not(.bare):after,a[href^="mailto:"]:not(.bare):after{content:"(" attr(href) ")";display:inline-block;font-size:.875em;padding-left:.25em}
|
||||
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|
||||
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|
||||
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|
||||
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|
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|
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||||
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#header>h1:first-child{margin-top:1.25rem}
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||||
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||||
body.book #toc{border:0!important;text-align:left!important;padding:0!important;margin:0!important}
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||||
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||||
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|
||||
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|
||||
</style>
|
||||
</head>
|
||||
<body class="book">
|
||||
<div id="header">
|
||||
<h1>Spring Cloud Core</h1>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div id="preamble">
|
||||
<div class="sectionbody">
|
||||
<div id="spring-cloud-connectors-install" class="paragraph">
|
||||
<p>This core library provides programmatic access to application and service information. This library has no Spring dependencies and may be used in non-Spring applications.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>This library requires Java 6 or newer.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>This library is cloud-agnostic. Using Java SPI, it supports pluggable cloud and service connectors; support for Cloud Foundry and Heroku is available out-of-the-box, in addition to locally-provided configuration for development and testing.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_connecting_to_a_cloud">Connecting to a cloud</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="admonitionblock note">
|
||||
<table>
|
||||
<tr>
|
||||
<td class="icon">
|
||||
<div class="title">Note</div>
|
||||
</td>
|
||||
<td class="content">
|
||||
<div class="paragraph">
|
||||
<p>If you are using Spring Cloud in a Spring application, you should consider automatically injecting Spring beans instead.</p>
|
||||
</div>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
</div>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p>Include the desired cloud connectors on the runtime classpath as described in the main documentation.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Create a <code>CloudFactory</code> instance. Creation of a <code>CloudFactory</code> instance is a bit expensive, so using a singleton instance is recommended. If you are using a dependency injection framework such as Spring, create a bean for the <code>CloudFactory</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">CloudFactory cloudFactory = new CloudFactory();</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="ulist">
|
||||
<ul>
|
||||
<li>
|
||||
<p>Obtain the <code>Cloud</code> object for the environment in which the application is running.</p>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">Cloud cloud = cloudFactory.getCloud();</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Note that you must have a <code>CloudConnector</code> suitable for your deployment environment on your classpath. For example, if you are deploying the application to Cloud Foundry, you must add cloudfoundry-connector to your classpath. If no suitable <code>CloudConnctor</code> is found, the <code>getCloud()</code> method will throw a <code>CloudException</code>.</p>
|
||||
</div>
|
||||
</li>
|
||||
<li>
|
||||
<p>Use the <code>Cloud</code> instance to access application and service information and to create service connectors.</p>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">// ServiceInfo has all the information necessary to connect to the underlying service
|
||||
List<ServiceInfo> serviceInfos = cloud.getServiceInfos();</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">// find the `ServiceInfo` definitions suitable for connecting to a particular service type
|
||||
List<ServiceInfo> databaseInfos = cloud.getServiceInfos(DataSource.class);</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">// Alternately, let Spring Cloud create a service connector for you
|
||||
String serviceId = "inventory-db";
|
||||
DataSource ds = cloud.getServiceConnector(serviceId, DataSource.class, null /* default config */);</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_adding_cloud_connectors">Adding cloud connectors</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>A cloud provider may extend Spring Cloud by adding a new <code>CloudConnector</code> to make Spring Cloud work with a new cloud platform. The connector is responsible for telling whether the application is running in the specific cloud, identifying application information (such as the name and instance ID of the particular running instance), and mapping bound services (such as URIs exposed in environment variables) as <code>ServiceInfo</code> objects.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>See the Cloud Foundry and Heroku connectors for examples.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Spring Cloud uses the Java SPI to discover available connectors. New cloud connectors should list the fully-qualified class name in the provider-configuration file at</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>META-INF/services/org.springframework.cloud.CloudConnector</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_adding_service_discovery">Adding service discovery</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>To allow Spring Cloud to discover a new type of service (<code>HelloWorldService</code>), create a <code>ServiceInfo</code> class containing the information necessary to connect to your service. If your service can be specified via a URI, extend <code>UriBasedServiceInfo</code> and provide the URI scheme in a call to the <code>super</code> constructor.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>This class will expose information for a service available at</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>helloworld://username:password@host:port/Bonjour</pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">public class HelloWorldServiceInfo extends UriBasedServiceInfo {
|
||||
public static final String URI_SCHEME = "helloworld";
|
||||
|
||||
// needed to support structured service definitions like Cloud Foundry
|
||||
public HelloWorldServiceInfo(String id, String host, int port, String username, String password, String greeting) {
|
||||
super(id, URI_SCHEME, host, port, username, password, greeting);
|
||||
}
|
||||
|
||||
// needed to support URI-based service definitions like Heroku
|
||||
public HelloWorldServiceInfo(String id, String uri) {
|
||||
super(id, uri);
|
||||
}
|
||||
}</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Then you will need to create a <code>ServiceInfoCreator</code> for each cloud platform you want to support. You will probably want to extend the appropriate creator base class(es), such as <code>HerokuServiceInfoCreator</code>. This is often as simple as writing a method that instantiates a new <code>HelloWorldServiceInfo</code>.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Register your <code>ServiceInfoCreator</code> classes in the appropriate provider-configuration file for your cloud’s <code>ServiceInfoCreator</code> base class.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_adding_service_connectors">Adding service connectors</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>A service connector consumes a <code>ServiceInfo</code> discovered by the cloud connector and converts it into the appropriate service object, such as a <code>DataSource</code> for a service definition representing a SQL database.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Service connectors may be tightly bound to the framework whose service objects they are creating; for example, some connectors in the Spring service connector create connection factories defined by Spring Data, for use in building Spring Data templates.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>To add new service connectors, implement <code>ServiceConnectorCreator</code> in your connector classes and list the fully-qualified class names in the provider-configuration file at</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>META-INF/services/org.springframework.cloud.service.ServiceConnectorCreator</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2015-07-30 09:13:08 CDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
621
spring-cloud-spring-service-connector.html
Normal file
621
spring-cloud-spring-service-connector.html
Normal file
@@ -0,0 +1,621 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
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|
||||
<meta charset="UTF-8">
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||||
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||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<meta name="generator" content="Asciidoctor 1.5.0">
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||||
<title>Spring Cloud Spring Service Connector</title>
|
||||
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||||
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|
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|
||||
.show-for-print{display:inherit!important}}
|
||||
</style>
|
||||
</head>
|
||||
<body class="book">
|
||||
<div id="header">
|
||||
<h1>Spring Cloud Spring Service Connector</h1>
|
||||
</div>
|
||||
<div id="content">
|
||||
<div id="preamble">
|
||||
<div class="sectionbody">
|
||||
<div id="spring-cloud-connectors-install" class="paragraph">
|
||||
<p>Provides <code>ServiceConnectorCreator</code> implementation for <code>javax.sql.DataSource</code> and various spring-data connector factories.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Also provides Java config and the XML namespace support for connecting to cloud services as well as accessing cloud services and application properties.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_the_java_config">The Java Config</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="paragraph">
|
||||
<p>Typical use of Java config involves extending the <code>AbstractCloudConfig</code> class and adding methods with the <code>@Bean</code> annotation to create beans for services. Apps migrating from auto-reconfguration might first try the service-scanning approach until they need more explicit control. Java config also offers a way to expose application and service properties, should you choose to take a lower level access in creating service connectors yourself (or for debugging purposes, etc.).</p>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_creating_service_beans">Creating Service Beans</h3>
|
||||
<div class="paragraph">
|
||||
<p>In the following example, the configuration creates a <code>DataSource</code> bean connecting to the only relational database service bound to the app (it will fail if there is no such unique service). It also creates a <code>MongoDbFactory</code> bean, again, connecting to the only mongodb service bound to the app. Please check Javadoc for <code>AbstractCloudConfig</code> for ways to connect to other services.</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">class CloudConfig extends AbstractCloudConfig {
|
||||
@Bean
|
||||
public DataSource inventoryDataSource() {
|
||||
return connectionFactory().dataSource();
|
||||
}
|
||||
|
||||
@Bean
|
||||
public MongoDbFactory documentMongoDbFactory() {
|
||||
return connectionFactory().mongoDbFactory();
|
||||
}
|
||||
|
||||
//... more beans to obtain service connectors
|
||||
}</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>The bean names will match the method names unless you specify an explicit value to the annotation such as <code>@Bean("inventory-service")</code> (this just follows how Spring’s Java configuration works).</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>If you have more than one service of a type bound to the app or want to have an explicit control over the services to which a bean is bound, you can pass the service names to methods such as <code>dataSource()</code> and <code>mongoDbFactory()</code> as follows:</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">class CloudConfig extends AbstractCloudConfig {
|
||||
@Bean
|
||||
public DataSource inventoryDataSource() {
|
||||
return connectionFactory().dataSource("inventory-db-service");
|
||||
}
|
||||
|
||||
@Bean
|
||||
public MongoDbFactory documentMongoDbFactory() {
|
||||
return connectionFactory().mongoDbFactory("document-service");
|
||||
}
|
||||
|
||||
//... more beans to obtain service connectors
|
||||
}</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Method such as <code>dataSource()</code> come in a additional overloaded variant that offer specifying configuration options such as the pooling parameters. Please see Javadoc for more details.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_connecting_to_generic_services">Connecting to Generic Services</h3>
|
||||
<div class="paragraph">
|
||||
<p>Java config supports access to generic services (that don’t have a directly mapped method—​typical for a newly introduced service or connecting to a private service in private PaaS) through the <code>service()</code> method. It follows the same pattern as the <code>dataSource()</code> etc, except it allows supplying the connector type as an additional parameters.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_scanning_for_services">Scanning for Services</h3>
|
||||
<div class="paragraph">
|
||||
<p>You can scan for each bound service using the <code>@ServiceScan</code> annotation as follows (conceptually similar to the @ComponentScan annotation in Spring):</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">@Configuration
|
||||
@ServiceScan
|
||||
class CloudConfig {
|
||||
}</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Here, one bean of the appropriate type (<code>DataSource</code> for a relational database service, for example) will be created. Each created bean will have the <code>id</code> matching the corresponding service name. You can then inject such beans using auto-wiring:</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>@Autowired DataSource inventoryDb;</pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>If the app is bound to more than one services of a type, you can use the <code>@Qualifier</code> annotation supplying it the name of the service as in the following code:</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre>@Autowired @Qualifier("inventory-db") DataSource inventoryDb;
|
||||
@Autowired @Qualifier("shipping-db") DataSource shippingDb;</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_accessing_service_properties">Accessing Service Properties</h3>
|
||||
<div class="paragraph">
|
||||
<p>You can expose raw properties for all services and the app throught a bean as follows:</p>
|
||||
</div>
|
||||
<div class="listingblock">
|
||||
<div class="content">
|
||||
<pre class="highlight"><code class="language-java" data-lang="java">class CloudPropertiesConfig extends AbstractCloudConfig {
|
||||
@Bean
|
||||
public Properties cloudProperties() {
|
||||
return properties();
|
||||
}
|
||||
}</code></pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect1">
|
||||
<h2 id="_the_code_cloud_code_namespace">The <code><cloud></code> Namespace</h2>
|
||||
<div class="sectionbody">
|
||||
<div class="sect2">
|
||||
<h3 id="_setting_up">Setting Up</h3>
|
||||
<div class="paragraph">
|
||||
<p>The <code><cloud></code> namespace offers a simple way for Spring application to connect to cloud services. To use this namespace, add a declaration for the cloud namespace:</p>
|
||||
</div>
|
||||
<div class="literalblock">
|
||||
<div class="content">
|
||||
<pre><?xml version="1.0" encoding="UTF-8"?>
|
||||
<beans xmlns="http://www.springframework.org/schema/beans"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xmlns:cloud="http://www.springframework.org/schema/cloud"
|
||||
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
|
||||
http://www.springframework.org/schema/cloud http://www.springframework.org/schema/cloud/spring-cloud.xsd"></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="literalblock">
|
||||
<div class="content">
|
||||
<pre><!-- <cloud> namespace usage here --></pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_creating_service_beans_2">Creating Service Beans</h3>
|
||||
<div class="paragraph">
|
||||
<p>Each namespace element that creates a bean corresponding to a service follows the following pattern (example is for a relational service):</p>
|
||||
</div>
|
||||
<div class="literalblock">
|
||||
<div class="content">
|
||||
<pre><cloud:data-source id="inventory-db" service-name="inventory-db-service">
|
||||
<cloud:connection properties="sessionVariables=sql_mode='ANSI';characterEncoding=UTF-8"/>
|
||||
<cloud:pool pool-size="20" max-wait-time="200"/>
|
||||
</cloud></pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>This creates a <code>javax.sql.DataSource</code> bean with the <code>inventory-db</code> id, binding it to <code>inventory-db-service</code>. The created <code>DataSource</code> bean is configured with connection and pool properties as specified in the nested elements.
|
||||
When the <code>id</code> attribute is not specified, the service name is used as the <code>id</code>. When the <code>service-name</code> is not specified, the bean is bound to the only service in the corresponding category (relational database, in this case). If no unique service is found, a runtime exception is thrown.</p>
|
||||
</div>
|
||||
<div class="paragraph">
|
||||
<p>Other namespace elements that create service connector include:</p>
|
||||
</div>
|
||||
<div class="literalblock">
|
||||
<div class="content">
|
||||
<pre><cloud:mongo-db-factory/>
|
||||
<cloud:redis-connection-factory/>
|
||||
<cloud:rabbit-connection-factory/></pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_connecting_to_generic_services_2">Connecting to Generic Services</h3>
|
||||
<div class="paragraph">
|
||||
<p>We also supports a generic <code><cloud:service></code> namespace to allow connecting to a service that doesn’t have directly mapped element (typical for a newly introduced service or connecting to a private service in private PaaS). You must specify either the <code>connector-type</code> attribute (so that it can find a unique service matching that type) or the <code>service-name</code> attribute.</p>
|
||||
</div>
|
||||
<div class="literalblock">
|
||||
<div class="content">
|
||||
<pre><cloud:service id="email" service-name="email-service" connector-type="com.something.EmailConnectory/></pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_scanning_for_services_2">Scanning for Services</h3>
|
||||
<div class="paragraph">
|
||||
<p>Besides these element that create one bean per element, we also support the <code><cloud:service-scan></code> element in the same spirit as the <code><context:component-scan></code> element. It scans for all the services bound to the app and creates a bean corresponding to each service. Each created bean has id that matches the service name to allow the use of the @Qualifier annotation along with @Autowired when more than one bean of the same type is introduced.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="sect2">
|
||||
<h3 id="_accessing_service_properties_2">Accessing Service Properties</h3>
|
||||
<div class="paragraph">
|
||||
<p>Lastly, we support <code><cloud:properties></code> that exposes properties for the app and services.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
<div id="footer-text">
|
||||
Last updated 2015-07-30 09:49:01 CDT
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user