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<body class="book toc2 toc-left">
<div id="header">
<h1>Spring Cloud Zookeeper</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#spring-cloud-zookeeper-install">Install Zookeeper</a></li>
<li><a href="#spring-cloud-zookeeper-discovery">Service Discovery with Zookeeper</a>
<ul class="sectlevel2">
<li><a href="#_activating">Activating</a></li>
<li><a href="#_registering_with_zookeeper">Registering with Zookeeper</a></li>
<li><a href="#_using_the_discoveryclient">Using the DiscoveryClient</a></li>
</ul>
</li>
<li><a href="#spring-cloud-zookeeper-netflix">Using Spring Cloud Zookeeper with Spring Cloud Netflix Components</a>
<ul class="sectlevel2">
<li><a href="#_ribbon_with_zookeeper">Ribbon with Zookeeper</a></li>
</ul>
</li>
<li><a href="#spring-cloud-zookeeper-service-registry">Spring Cloud Zookeeper and Service Registry</a>
<ul class="sectlevel2">
<li><a href="#_instance_status">Instance Status</a></li>
</ul>
</li>
<li><a href="#spring-cloud-zookeeper-dependencies">Zookeeper Dependencies</a>
<ul class="sectlevel2">
<li><a href="#spring-cloud-zookeeper-dependencies-using">Using the Zookeeper Dependencies</a></li>
<li><a href="#spring-cloud-zookeeper-dependencies-activating">Activating Zookeeper Dependencies</a></li>
<li><a href="#spring-cloud-zookeeper-dependencies-setting-up">Setting up Zookeeper Dependencies</a></li>
<li><a href="#spring-cloud-zookeeper-dependencies-configuring">Configuring Spring Cloud Zookeeper Dependencies</a></li>
</ul>
</li>
<li><a href="#spring-cloud-zookeeper-dependency-watcher">Spring Cloud Zookeeper Dependency Watcher</a>
<ul class="sectlevel2">
<li><a href="#_activating_2">Activating</a></li>
<li><a href="#_registering_a_listener">Registering a Listener</a></li>
<li><a href="#spring-cloud-zookeeper-dependency-watcher-presence-checker">Using the Presence Checker</a></li>
</ul>
</li>
<li><a href="#spring-cloud-zookeeper-config">Distributed Configuration with Zookeeper</a>
<ul class="sectlevel2">
<li><a href="#_activating_3">Activating</a></li>
<li><a href="#_customizing">Customizing</a></li>
<li><a href="#_access_control_lists_acls">Access Control Lists (ACLs)</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>This project provides Zookeeper integrations for Spring Boot applications through
autoconfiguration and binding to the Spring Environment and other Spring programming model
idioms. With a few annotations, you can quickly enable and configure the common patterns
inside your application and build large distributed systems with Zookeeper based
components. The provided patterns include Service Discovery and Configuration. Integration
with Spring Cloud Netflix provides Intelligent Routing (Zuul), Client Side Load Balancing
(Ribbon), and Circuit Breaker (Hystrix).</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-install"><a class="link" href="#spring-cloud-zookeeper-install">Install Zookeeper</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>See the <a href="https://zookeeper.apache.org/doc/current/zookeeperStarted.html">installation
documentation</a> for instructions on how to install Zookeeper.</p>
</div>
<div class="paragraph">
<p>Spring Cloud Zookeeper uses Apache Curator behind the scenes.
While Zookeeper 3.5.x is still considered "beta" by the Zookeeper development team,
the reality is that it is used in production by many users.
However, Zookeeper 3.4.x is also used in production.
Prior to Apache Curator 4.0, both versions of Zookeeper were supported via two versions of Apache Curator.
Starting with Curator 4.0 both versions of Zookeeper are supported via the same Curator libraries.</p>
</div>
<div class="paragraph">
<p>In case you are integrating with version 3.4 you need to change the Zookeeper dependency
that comes shipped with <code>curator</code>, and thus <code>spring-cloud-zookeeper</code>.
To do so simply exclude that dependency and add the 3.4.x version like shown below.</p>
</div>
<div class="listingblock">
<div class="title">maven</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml">&lt;dependency&gt;
&lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
&lt;artifactId&gt;spring-cloud-starter-zookeeper-all&lt;/artifactId&gt;
&lt;exclusions&gt;
&lt;exclusion&gt;
&lt;groupId&gt;org.apache.zookeeper&lt;/groupId&gt;
&lt;artifactId&gt;zookeeper&lt;/artifactId&gt;
&lt;/exclusion&gt;
&lt;/exclusions&gt;
&lt;/dependency&gt;
&lt;dependency&gt;
&lt;groupId&gt;org.apache.zookeeper&lt;/groupId&gt;
&lt;artifactId&gt;zookeeper&lt;/artifactId&gt;
&lt;version&gt;3.4.12&lt;/version&gt;
&lt;exclusions&gt;
&lt;exclusion&gt;
&lt;groupId&gt;org.slf4j&lt;/groupId&gt;
&lt;artifactId&gt;slf4j-log4j12&lt;/artifactId&gt;
&lt;/exclusion&gt;
&lt;/exclusions&gt;
&lt;/dependency&gt;</code></pre>
</div>
</div>
<div class="listingblock">
<div class="title">gradle</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-groovy hljs" data-lang="groovy">compile('org.springframework.cloud:spring-cloud-starter-zookeeper-all') {
exclude group: 'org.apache.zookeeper', module: 'zookeeper'
}
compile('org.apache.zookeeper:zookeeper:3.4.12') {
exclude group: 'org.slf4j', module: 'slf4j-log4j12'
}</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-discovery"><a class="link" href="#spring-cloud-zookeeper-discovery">Service Discovery with Zookeeper</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Service Discovery is one of the key tenets of a microservice based architecture. Trying to
hand-configure each client or some form of convention can be difficult to do and can be
brittle. <a href="https://curator.apache.org">Curator</a>(A Java library for Zookeeper) provides Service
Discovery through a <a href="https://curator.apache.org/curator-x-discovery/">Service Discovery
Extension</a>. Spring Cloud Zookeeper uses this extension for service registration and
discovery.</p>
</div>
<div class="sect2">
<h3 id="_activating"><a class="link" href="#_activating">Activating</a></h3>
<div class="paragraph">
<p>Including a dependency on
<code>org.springframework.cloud:spring-cloud-starter-zookeeper-discovery</code> enables
autoconfiguration that sets up Spring Cloud Zookeeper Discovery.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
For web functionality, you still need to include
<code>org.springframework.boot:spring-boot-starter-web</code>.
</td>
</tr>
</table>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<i class="fa icon-caution" title="Caution"></i>
</td>
<td class="content">
When working with version 3.4 of Zookeeper you need to change
the way you include the dependency as described <a href="#spring-cloud-zookeeper-install">here</a>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_registering_with_zookeeper"><a class="link" href="#_registering_with_zookeeper">Registering with Zookeeper</a></h3>
<div class="paragraph">
<p>When a client registers with Zookeeper, it provides metadata (such as host and port, ID,
and name) about itself.</p>
</div>
<div class="paragraph">
<p>The following example shows a Zookeeper client:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@SpringBootApplication
@RestController
public class Application {
@RequestMapping("/")
public String home() {
return "Hello world";
}
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class).web(true).run(args);
}
}</code></pre>
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The preceding example is a normal Spring Boot application.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>If Zookeeper is located somewhere other than <code>localhost:2181</code>, the configuration must
provide the location of the server, as shown in the following example:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yml hljs" data-lang="yml">spring:
cloud:
zookeeper:
connect-string: localhost:2181</code></pre>
</div>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<i class="fa icon-caution" title="Caution"></i>
</td>
<td class="content">
If you use <a href="#spring-cloud-zookeeper-config">Spring Cloud Zookeeper Config</a>, the
values shown in the preceding example need to be in <code>bootstrap.yml</code> instead of
<code>application.yml</code>.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>The default service name, instance ID, and port (taken from the <code>Environment</code>) are
<code>${spring.application.name}</code>, the Spring Context ID, and <code>${server.port}</code>, respectively.</p>
</div>
<div class="paragraph">
<p>Having <code>spring-cloud-starter-zookeeper-discovery</code> on the classpath makes the app into both
a Zookeeper &#8220;service&#8221; (that is, it registers itself) and a &#8220;client&#8221; (that is, it can
query Zookeeper to locate other services).</p>
</div>
<div class="paragraph">
<p>If you would like to disable the Zookeeper Discovery Client, you can set
<code>spring.cloud.zookeeper.discovery.enabled</code> to <code>false</code>.</p>
</div>
</div>
<div class="sect2">
<h3 id="_using_the_discoveryclient"><a class="link" href="#_using_the_discoveryclient">Using the DiscoveryClient</a></h3>
<div class="paragraph">
<p>Spring Cloud has support for
<a href="https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/asciidoc/spring-cloud-netflix.adoc#spring-cloud-feign">Feign</a>
(a REST client builder) and
<a href="https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/asciidoc/spring-cloud-netflix.adoc#spring-cloud-ribbon">Spring
<code>RestTemplate</code></a>, using logical service names instead of physical URLs.</p>
</div>
<div class="paragraph">
<p>You can also use the <code>org.springframework.cloud.client.discovery.DiscoveryClient</code>, which
provides a simple API for discovery clients that is not specific to Netflix, 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">@Autowired
private DiscoveryClient discoveryClient;
public String serviceUrl() {
List&lt;ServiceInstance&gt; list = discoveryClient.getInstances("STORES");
if (list != null &amp;&amp; list.size() &gt; 0 ) {
return list.get(0).getUri().toString();
}
return null;
}</code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-netflix"><a class="link" href="#spring-cloud-zookeeper-netflix">Using Spring Cloud Zookeeper with Spring Cloud Netflix Components</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Netflix supplies useful tools that work regardless of which <code>DiscoveryClient</code>
implementation you use. Feign, Turbine, Ribbon, and Zuul all work with Spring Cloud
Zookeeper.</p>
</div>
<div class="sect2">
<h3 id="_ribbon_with_zookeeper"><a class="link" href="#_ribbon_with_zookeeper">Ribbon with Zookeeper</a></h3>
<div class="paragraph">
<p>Spring Cloud Zookeeper provides an implementation of Ribbon&#8217;s <code>ServerList</code>. When you use
the <code>spring-cloud-starter-zookeeper-discovery</code>, Ribbon is autoconfigured to use the
<code>ZookeeperServerList</code> by default.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-service-registry"><a class="link" href="#spring-cloud-zookeeper-service-registry">Spring Cloud Zookeeper and Service Registry</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Zookeeper implements the <code>ServiceRegistry</code> interface, letting developers
register arbitrary services in a programmatic way.</p>
</div>
<div class="paragraph">
<p>The <code>ServiceInstanceRegistration</code> class offers a <code>builder()</code> method to create a
<code>Registration</code> object that can be used by the <code>ServiceRegistry</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">@Autowired
private ZookeeperServiceRegistry serviceRegistry;
public void registerThings() {
ZookeeperRegistration registration = ServiceInstanceRegistration.builder()
.defaultUriSpec()
.address("anyUrl")
.port(10)
.name("/a/b/c/d/anotherservice")
.build();
this.serviceRegistry.register(registration);
}</code></pre>
</div>
</div>
<div class="sect2">
<h3 id="_instance_status"><a class="link" href="#_instance_status">Instance Status</a></h3>
<div class="paragraph">
<p>Netflix Eureka supports having instances that are <code>OUT_OF_SERVICE</code> registered with the
server. These instances are not returned as active service instances. This is useful for
behaviors such as blue/green deployments. (Note that the Curator Service Discovery recipe
does not support this behavior.) Taking advantage of the flexible payload has let Spring
Cloud Zookeeper implement <code>OUT_OF_SERVICE</code> by updating some specific metadata and then
filtering on that metadata in the Ribbon <code>ZookeeperServerList</code>. The <code>ZookeeperServerList</code>
filters out all non-null instance statuses that do not equal <code>UP</code>. If the instance status
field is empty, it is considered to be <code>UP</code> for backwards compatibility. To change the
status of an instance, make a <code>POST</code> with <code>OUT_OF_SERVICE</code> to the <code>ServiceRegistry</code>
instance status actuator endpoint, as shown in the following example:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-sh hljs" data-lang="sh">$ http POST http://localhost:8081/service-registry status=OUT_OF_SERVICE</code></pre>
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The preceding example uses the <code>http</code> command from <a href="https://httpie.org" class="bare">https://httpie.org</a>.
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-dependencies"><a class="link" href="#spring-cloud-zookeeper-dependencies">Zookeeper Dependencies</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>The following topics cover how to work with Spring Cloud Zookeeper dependencies:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="#spring-cloud-zookeeper-dependencies-using">Using the Zookeeper Dependencies</a></p>
</li>
<li>
<p><a href="#spring-cloud-zookeeper-dependencies-activating">Activating Zookeeper Dependencies</a></p>
</li>
<li>
<p><a href="#spring-cloud-zookeeper-dependencies-setting-up">Setting up Zookeeper Dependencies</a></p>
</li>
<li>
<p><a href="#spring-cloud-zookeeper-dependencies-configuring">Configuring Spring Cloud Zookeeper Dependencies</a></p>
</li>
</ul>
</div>
<div class="sect2">
<h3 id="spring-cloud-zookeeper-dependencies-using"><a class="link" href="#spring-cloud-zookeeper-dependencies-using">Using the Zookeeper Dependencies</a></h3>
<div class="paragraph">
<p>Spring Cloud Zookeeper gives you a possibility to provide dependencies of your application
as properties. As dependencies, you can understand other applications that are registered
in Zookeeper and which you would like to call through
<a href="https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/asciidoc/spring-cloud-netflix.adoc#spring-cloud-feign">Feign</a>
(a REST client builder) and <a href="https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/asciidoc/spring-cloud-netflix.adoc#spring-cloud-ribbon">Spring <code>RestTemplate</code></a>.</p>
</div>
<div class="paragraph">
<p>You can also use the Zookeeper Dependency Watchers functionality to control and monitor
the state of your dependencies.</p>
</div>
</div>
<div class="sect2">
<h3 id="spring-cloud-zookeeper-dependencies-activating"><a class="link" href="#spring-cloud-zookeeper-dependencies-activating">Activating Zookeeper Dependencies</a></h3>
<div class="paragraph">
<p>Including a dependency on
<code>org.springframework.cloud:spring-cloud-starter-zookeeper-discovery</code> enables
autoconfiguration that sets up Spring Cloud Zookeeper Dependencies. Even if you provide
the dependencies in your properties, you can turn off the dependencies. To do so, set the
<code>spring.cloud.zookeeper.dependency.enabled</code> property to false (it defaults to <code>true</code>).</p>
</div>
</div>
<div class="sect2">
<h3 id="spring-cloud-zookeeper-dependencies-setting-up"><a class="link" href="#spring-cloud-zookeeper-dependencies-setting-up">Setting up Zookeeper Dependencies</a></h3>
<div class="paragraph">
<p>Consider the following example of dependency representation:</p>
</div>
<div class="listingblock">
<div class="title">application.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yml hljs" data-lang="yml">spring.application.name: yourServiceName
spring.cloud.zookeeper:
dependencies:
newsletter:
path: /path/where/newsletter/has/registered/in/zookeeper
loadBalancerType: ROUND_ROBIN
contentTypeTemplate: application/vnd.newsletter.$version+json
version: v1
headers:
header1:
- value1
header2:
- value2
required: false
stubs: org.springframework:foo:stubs
mailing:
path: /path/where/mailing/has/registered/in/zookeeper
loadBalancerType: ROUND_ROBIN
contentTypeTemplate: application/vnd.mailing.$version+json
version: v1
required: true</code></pre>
</div>
</div>
<div class="paragraph">
<p>The next few sections go through each part of the dependency one by one. The root property
name is <code>spring.cloud.zookeeper.dependencies</code>.</p>
</div>
<div class="sect3">
<h4 id="spring-cloud-zookeeper-dependencies-setting-up-aliases"><a class="link" href="#spring-cloud-zookeeper-dependencies-setting-up-aliases">Aliases</a></h4>
<div class="paragraph">
<p>Below the root property you have to represent each dependency as an alias. This is due to
the constraints of Ribbon, which requires that the application ID be placed in the URL.
Consequently, you cannot pass any complex path, suchas <code>/myApp/myRoute/name</code>). The alias
is the name you use instead of the <code>serviceId</code> for <code>DiscoveryClient</code>, <code>Feign</code>, or
<code>RestTemplate</code>.</p>
</div>
<div class="paragraph">
<p>In the previous examples, the aliases are <code>newsletter</code> and <code>mailing</code>. The following
example shows Feign usage with a <code>newsletter</code> alias:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@FeignClient("newsletter")
public interface NewsletterService {
@RequestMapping(method = RequestMethod.GET, value = "/newsletter")
String getNewsletters();
}</code></pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="_path"><a class="link" href="#_path">Path</a></h4>
<div class="paragraph">
<p>The path is represented by the <code>path</code> YAML property and is the path under which the
dependency is registered under Zookeeper. As described in the
<a href="#spring-cloud-zookeeper-dependencies-setting-up-aliases">previous section</a>, Ribbon
operates on URLs. As a result, this path is not compliant with its requirement.
That is why Spring Cloud Zookeeper maps the alias to the proper path.</p>
</div>
</div>
<div class="sect3">
<h4 id="_load_balancer_type"><a class="link" href="#_load_balancer_type">Load Balancer Type</a></h4>
<div class="paragraph">
<p>The load balancer type is represented by <code>loadBalancerType</code> YAML property.</p>
</div>
<div class="paragraph">
<p>If you know what kind of load-balancing strategy has to be applied when calling this
particular dependency, you can provide it in the YAML file, and it is automatically
applied. You can choose one of the following load balancing strategies:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>STICKY: Once chosen, the instance is always called.</p>
</li>
<li>
<p>RANDOM: Picks an instance randomly.</p>
</li>
<li>
<p>ROUND_ROBIN: Iterates over instances over and over again.</p>
</li>
</ul>
</div>
</div>
<div class="sect3">
<h4 id="_content_type_template_and_version"><a class="link" href="#_content_type_template_and_version"><code>Content-Type</code> Template and Version</a></h4>
<div class="paragraph">
<p>The <code>Content-Type</code> template and version are represented by the <code>contentTypeTemplate</code> and
<code>version</code> YAML properties.</p>
</div>
<div class="paragraph">
<p>If you version your API in the <code>Content-Type</code> header, you do not want to add this header
to each of your requests. Also, if you want to call a new version of the API, you do not
want to roam around your code to bump up the API version. That is why you can provide a
<code>contentTypeTemplate</code> with a special <code>$version</code> placeholder. That placeholder will be filled by the value of the
<code>version</code> YAML property. Consider the following example of a <code>contentTypeTemplate</code>:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>application/vnd.newsletter.$version+json</pre>
</div>
</div>
<div class="paragraph">
<p>Further consider the following <code>version</code>:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>v1</pre>
</div>
</div>
<div class="paragraph">
<p>The combination of <code>contentTypeTemplate</code> and version results in the creation of a
<code>Content-Type</code> header for each request, as follows:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>application/vnd.newsletter.v1+json</pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="_default_headers"><a class="link" href="#_default_headers">Default Headers</a></h4>
<div class="paragraph">
<p>Default headers are represented by the <code>headers</code> map in YAML.</p>
</div>
<div class="paragraph">
<p>Sometimes, each call to a dependency requires setting up of some default headers. To not
do that in code, you can set them up in the YAML file, as shown in the following example
<code>headers</code> section:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-yml hljs" data-lang="yml">headers:
Accept:
- text/html
- application/xhtml+xml
Cache-Control:
- no-cache</code></pre>
</div>
</div>
<div class="paragraph">
<p>That <code>headers</code> section results in adding the <code>Accept</code> and <code>Cache-Control</code> headers with
appropriate list of values in your HTTP request.</p>
</div>
</div>
<div class="sect3">
<h4 id="_required_dependencies"><a class="link" href="#_required_dependencies">Required Dependencies</a></h4>
<div class="paragraph">
<p>Required dependencies are represented by <code>required</code> property in YAML.</p>
</div>
<div class="paragraph">
<p>If one of your dependencies is required to be up when your application boots, you can set
the <code>required: true</code> property in the YAML file.</p>
</div>
<div class="paragraph">
<p>If your application cannot localize the required dependency during boot time, it throws an
exception, and the Spring Context fails to set up. In other words, your application cannot
start if the required dependency is not registered in Zookeeper.</p>
</div>
<div class="paragraph">
<p>You can read more about Spring Cloud Zookeeper Presence Checker
<a href="#spring-cloud-zookeeper-dependency-watcher-presence-checker">later in this document</a>.</p>
</div>
</div>
<div class="sect3">
<h4 id="_stubs"><a class="link" href="#_stubs">Stubs</a></h4>
<div class="paragraph">
<p>You can provide a colon-separated path to the JAR containing stubs of the dependency, as
shown in the following example:</p>
</div>
<div class="paragraph">
<p><code>stubs: org.springframework:myApp:stubs</code></p>
</div>
<div class="paragraph">
<p>where:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>org.springframework</code> is the <code>groupId</code>.</p>
</li>
<li>
<p><code>myApp</code> is the <code>artifactId</code>.</p>
</li>
<li>
<p><code>stubs</code> is the classifier. (Note that <code>stubs</code> is the default value.)</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Because <code>stubs</code> is the default classifier, the preceding example is equal to the following
example:</p>
</div>
<div class="paragraph">
<p><code>stubs: org.springframework:myApp</code></p>
</div>
</div>
</div>
<div class="sect2">
<h3 id="spring-cloud-zookeeper-dependencies-configuring"><a class="link" href="#spring-cloud-zookeeper-dependencies-configuring">Configuring Spring Cloud Zookeeper Dependencies</a></h3>
<div class="paragraph">
<p>You can set the following properties to enable or disable parts of Zookeeper Dependencies
functionalities:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>spring.cloud.zookeeper.dependencies</code>: If you do not set this property, you cannot use
Zookeeper Dependencies.</p>
</li>
<li>
<p><code>spring.cloud.zookeeper.dependency.ribbon.enabled</code> (enabled by default): Ribbon requires
either explicit global configuration or a particular one for a dependency. By turning on
this property, runtime load balancing strategy resolution is possible, and you can use the
<code>loadBalancerType</code> section of the Zookeeper Dependencies. The configuration that needs
this property has an implementation of <code>LoadBalancerClient</code> that delegates to the
<code>ILoadBalancer</code> presented in the next bullet.</p>
</li>
<li>
<p><code>spring.cloud.zookeeper.dependency.ribbon.loadbalancer</code> (enabled by default): Thanks to
this property, the custom <code>ILoadBalancer</code> knows that the part of the URI passed to Ribbon
might actually be the alias that has to be resolved to a proper path in Zookeeper. Without
this property, you cannot register applications under nested paths.</p>
</li>
<li>
<p><code>spring.cloud.zookeeper.dependency.headers.enabled</code> (enabled by default): This property
registers a <code>RibbonClient</code> that automatically appends appropriate headers and content
types with their versions, as presented in the Dependency configuration. Without this
setting, those two parameters do not work.</p>
</li>
<li>
<p><code>spring.cloud.zookeeper.dependency.resttemplate.enabled</code> (enabled by default): When
enabled, this property modifies the request headers of a <code>@LoadBalanced</code>-annotated
<code>RestTemplate</code> such that it passes headers and content type with the version set in
dependency configuration. Without this setting, those two parameters do not work.</p>
</li>
</ul>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-dependency-watcher"><a class="link" href="#spring-cloud-zookeeper-dependency-watcher">Spring Cloud Zookeeper Dependency Watcher</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Dependency Watcher mechanism lets you register listeners to your dependencies. The
functionality is, in fact, an implementation of the <code>Observator</code> pattern. When a
dependency changes, its state (to either UP or DOWN), some custom logic can be applied.</p>
</div>
<div class="sect2">
<h3 id="_activating_2"><a class="link" href="#_activating_2">Activating</a></h3>
<div class="paragraph">
<p>Spring Cloud Zookeeper Dependencies functionality needs to be enabled for you to use the
Dependency Watcher mechanism.</p>
</div>
</div>
<div class="sect2">
<h3 id="_registering_a_listener"><a class="link" href="#_registering_a_listener">Registering a Listener</a></h3>
<div class="paragraph">
<p>To register a listener, you must implement an interface called
<code>org.springframework.cloud.zookeeper.discovery.watcher.DependencyWatcherListener</code> and
register it as a bean. The interface gives you one method:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">void stateChanged(String dependencyName, DependencyState newState);</code></pre>
</div>
</div>
<div class="paragraph">
<p>If you want to register a listener for a particular dependency, the <code>dependencyName</code> would
be the discriminator for your concrete implementation. <code>newState</code> provides you with
information about whether your dependency has changed to <code>CONNECTED</code> or <code>DISCONNECTED</code>.</p>
</div>
</div>
<div class="sect2">
<h3 id="spring-cloud-zookeeper-dependency-watcher-presence-checker"><a class="link" href="#spring-cloud-zookeeper-dependency-watcher-presence-checker">Using the Presence Checker</a></h3>
<div class="paragraph">
<p>Bound with the Dependency Watcher is the functionality called Presence Checker. It lets
you provide custom behavior when your application boots, to react according to the state
of your dependencies.</p>
</div>
<div class="paragraph">
<p>The default implementation of the abstract
<code>org.springframework.cloud.zookeeper.discovery.watcher.presence.DependencyPresenceOnStartupVerifier</code>
class is the
<code>org.springframework.cloud.zookeeper.discovery.watcher.presence.DefaultDependencyPresenceOnStartupVerifier</code>,
which works in the following way.</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>If the dependency is marked us <code>required</code> and is not in Zookeeper, when your application
boots, it throws an exception and shuts down.</p>
</li>
<li>
<p>If the dependency is not <code>required</code>, the
<code>org.springframework.cloud.zookeeper.discovery.watcher.presence.LogMissingDependencyChecker</code>
logs that the dependency is missing at the <code>WARN</code> level.</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>Because the <code>DefaultDependencyPresenceOnStartupVerifier</code> is registered only when there is
no bean of type <code>DependencyPresenceOnStartupVerifier</code>, this functionality can be
overridden.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-cloud-zookeeper-config"><a class="link" href="#spring-cloud-zookeeper-config">Distributed Configuration with Zookeeper</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Zookeeper provides a
<a href="https://zookeeper.apache.org/doc/current/zookeeperOver.html#sc_dataModelNameSpace">hierarchical namespace</a>
that lets clients store arbitrary data, such as configuration data. Spring Cloud Zookeeper
Config is an alternative to the
<a href="https://github.com/spring-cloud/spring-cloud-config">Config Server and Client</a>.
Configuration is loaded into the Spring Environment during the special &#8220;bootstrap&#8221;
phase. Configuration is stored in the <code>/config</code> namespace by default. Multiple
<code>PropertySource</code> instances are created, based on the application&#8217;s name and the active
profiles, to mimic the Spring Cloud Config order of resolving properties. For example, an
application with a name of <code>testApp</code> and with the <code>dev</code> profile has the following property
sources created for it:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>config/testApp,dev</code></p>
</li>
<li>
<p><code>config/testApp</code></p>
</li>
<li>
<p><code>config/application,dev</code></p>
</li>
<li>
<p><code>config/application</code></p>
</li>
</ul>
</div>
<div class="paragraph">
<p>The most specific property source is at the top, with the least specific at the bottom.
Properties in the <code>config/application</code> namespace apply to all applications that use
zookeeper for configuration. Properties in the <code>config/testApp</code> namespace are available
only to the instances of the service named <code>testApp</code>.</p>
</div>
<div class="paragraph">
<p>Configuration is currently read on startup of the application. Sending a HTTP <code>POST</code>
request to <code>/refresh</code> causes the configuration to be reloaded. Watching the configuration
namespace (which Zookeeper supports) is not currently implemented.</p>
</div>
<div class="sect2">
<h3 id="_activating_3"><a class="link" href="#_activating_3">Activating</a></h3>
<div class="paragraph">
<p>Including a dependency on
<code>org.springframework.cloud:spring-cloud-starter-zookeeper-config</code> enables
autoconfiguration that sets up Spring Cloud Zookeeper Config.</p>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<i class="fa icon-caution" title="Caution"></i>
</td>
<td class="content">
When working with version 3.4 of Zookeeper you need to change
the way you include the dependency as described <a href="#spring-cloud-zookeeper-install">here</a>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_customizing"><a class="link" href="#_customizing">Customizing</a></h3>
<div class="paragraph">
<p>Zookeeper Config may be customized by setting the following properties:</p>
</div>
<div class="listingblock">
<div class="title">bootstrap.yml</div>
<div class="content">
<pre class="highlightjs highlight"><code class="language-yml hljs" data-lang="yml">spring:
cloud:
zookeeper:
config:
enabled: true
root: configuration
defaultContext: apps
profileSeparator: '::'</code></pre>
</div>
</div>
<div class="ulist">
<ul>
<li>
<p><code>enabled</code>: Setting this value to <code>false</code> disables Zookeeper Config.</p>
</li>
<li>
<p><code>root</code>: Sets the base namespace for configuration values.</p>
</li>
<li>
<p><code>defaultContext</code>: Sets the name used by all applications.</p>
</li>
<li>
<p><code>profileSeparator</code>: Sets the value of the separator used to separate the profile name in
property sources with profiles.</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_access_control_lists_acls"><a class="link" href="#_access_control_lists_acls">Access Control Lists (ACLs)</a></h3>
<div class="paragraph">
<p>You can add authentication information for Zookeeper ACLs by calling the <code>addAuthInfo</code>
method of a <code>CuratorFramework</code> bean. One way to accomplish this is to provide your own
<code>CuratorFramework</code> bean, 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">@BoostrapConfiguration
public class CustomCuratorFrameworkConfig {
@Bean
public CuratorFramework curatorFramework() {
CuratorFramework curator = new CuratorFramework();
curator.addAuthInfo("digest", "user:password".getBytes());
return curator;
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Consult
<a href="https://github.com/spring-cloud/spring-cloud-zookeeper/blob/master/spring-cloud-zookeeper-core/src/main/java/org/springframework/cloud/zookeeper/ZookeeperAutoConfiguration.java">the ZookeeperAutoConfiguration class</a>
to see how the <code>CuratorFramework</code> bean&#8217;s default configuration.</p>
</div>
<div class="paragraph">
<p>Alternatively, you can add your credentials from a class that depends on the existing
<code>CuratorFramework</code> bean, 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">@BoostrapConfiguration
public class DefaultCuratorFrameworkConfig {
public ZookeeperConfig(CuratorFramework curator) {
curator.addAuthInfo("digest", "user:password".getBytes());
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>The creation of this bean must occur during the boostrapping phase. You can register
configuration classes to run during this phase by annotating them with
<code>@BootstrapConfiguration</code> and including them in a comma-separated list that you set as the
value of the <code>org.springframework.cloud.bootstrap.BootstrapConfiguration</code> property in the
<code>resources/META-INF/spring.factories</code> file, as shown in the following example:</p>
</div>
<div class="listingblock">
<div class="title">resources/META-INF/spring.factories</div>
<div class="content">
<pre>org.springframework.cloud.bootstrap.BootstrapConfiguration=\
my.project.CustomCuratorFrameworkConfig,\
my.project.DefaultCuratorFrameworkConfig</pre>
</div>
</div>
</div>
</div>
</div>
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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
spring-cloud-zookeeper/2.2.0.M1/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
spring-cloud-zookeeper/2.2.0.M1/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;
}

83
spring-cloud-zookeeper/2.2.0.M1/js/highlight/styles/monokai-sublime.min.css vendored Normal file
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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
spring-cloud-zookeeper/2.2.0.M1/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;
}

84
spring-cloud-zookeeper/2.2.0.M1/js/highlight/styles/solarized-light.min.css vendored Normal file
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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
spring-cloud-zookeeper/2.2.0.M1/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;
}

107
spring-cloud-zookeeper/2.2.0.M1/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' +
'<path class="st0" d="M55.2,30.9c-0.5-0.3-0.9-0.9-0.9-1.6c0-1.1,0.8-1.9,1.9-1.9c0.4,0,0.7,0.1,1,0.3c2,1.3,4.1,2,5.9,2\n' +
'c2,0,3.2-0.9,3.2-2.2v-0.1c0-1.6-2.2-2.2-4.6-2.9c-3-0.9-6.5-2.1-6.5-6.1v-0.1c0-3.9,3.2-6.3,7.4-6.3c2.2,0,4.5,0.6,6.5,1.7\n' +
'c0.7,0.4,1.1,1,1.1,1.8c0,1.1-0.9,1.9-2,1.9c-0.4,0-0.6-0.1-0.9-0.2c-1.7-0.9-3.4-1.4-4.9-1.4c-1.8,0-2.9,0.9-2.9,2v0.1\n' +
'c0,1.5,2.2,2.2,4.7,2.9c3,0.9,6.4,2.3,6.4,6v0.1c0,4.3-3.4,6.5-7.7,6.5C60.4,33.3,57.6,32.5,55.2,30.9z"/>\n' +
'<path class="st0" d="M72.5,14.3c0-1.3,1-2.4,2.3-2.4c1.3,0,2.4,1.1,2.4,2.4v1.4c1.5-2.2,3.7-3.9,7-3.9c4.8,0,9.6,3.8,9.6,10.7\n' +
'v0.1c0,6.8-4.7,10.7-9.6,10.7c-3.4,0-5.6-1.7-7-3.6V37c0,1.3-1.1,2.4-2.4,2.4c-1.3,0-2.3-1-2.3-2.4V14.3z M89.1,22.7L89.1,22.7\n' +
'c0-4.1-2.7-6.7-5.9-6.7c-3.2,0-6,2.7-6,6.6v0.1c0,4,2.8,6.6,6,6.6C86.4,29.3,89.1,26.7,89.1,22.7z"/>\n' +
'<path class="st0" d="M95.7,14.3c0-1.3,1-2.4,2.3-2.4c1.3,0,2.4,1.1,2.4,2.4v1.1c0.2-1.8,3.1-3.5,5.2-3.5c1.5,0,2.3,1,2.3,2.3\n' +
'c0,1.3-0.8,2.1-1.9,2.3c-3.4,0.6-5.7,3.5-5.7,7.6V31c0,1.3-1.1,2.3-2.4,2.3c-1.3,0-2.3-1-2.3-2.3V14.3z"/>\n' +
'<path class="st0" d="M109.7,14.3c0-1.3,1-2.4,2.3-2.4c1.3,0,2.4,1.1,2.4,2.4V31c0,1.3-1.1,2.3-2.4,2.3c-1.3,0-2.3-1-2.3-2.3V14.3\n' +
'z"/>\n' +
'<path class="st0" d="M116.9,14.3c0-1.3,1-2.4,2.3-2.4c1.3,0,2.4,1.1,2.4,2.4v1c1.3-1.9,3.2-3.4,6.5-3.4c4.7,0,7.4,3.1,7.4,7.9V31\n' +
'c0,1.3-1,2.3-2.3,2.3c-1.3,0-2.4-1-2.4-2.3v-9.7c0-3.2-1.6-5-4.4-5c-2.7,0-4.7,1.9-4.7,5.1V31c0,1.3-1.1,2.3-2.4,2.3\n' +
'c-1.3,0-2.3-1-2.3-2.3V14.3z"/>\n' +
'<path class="st0" d="M156.2,11.9c-1.3,0-2.4,1.1-2.4,2.4v1.4c-1.5-2.2-3.7-3.9-7-3.9c-4.9,0-9.6,3.8-9.6,10.7v0.1\n' +
'c0,6.8,4.7,10.7,9.6,10.7c3.4,0,5.6-1.7,7-3.6c-0.2,3.7-2.5,5.7-6.5,5.7c-2.4,0-4.5-0.6-6.3-1.6c-0.2-0.1-0.5-0.2-0.9-0.2\n' +
'c-1.1,0-2,0.9-2,2c0,0.9,0.5,1.6,1.3,1.9c2.5,1.2,5.1,1.8,8,1.8c3.7,0,6.6-0.9,8.5-2.8c1.7-1.7,2.7-4.3,2.7-7.8V14.3\n' +
'C158.5,13,157.5,11.9,156.2,11.9z M147.9,29.2c-3.2,0-5.9-2.5-5.9-6.6v-0.1c0-4,2.7-6.6,5.9-6.6c3.2,0,6,2.7,6,6.6v0.1\n' +
'C153.9,26.6,151.1,29.2,147.9,29.2z"/>\n' +
'<path class="st0" d="M114.5,6.3c0,1.3-1.1,2.4-2.4,2.4c-1.3,0-2.4-1.1-2.4-2.4c0-1.3,1.1-2.4,2.4-2.4\n' +
'C113.4,3.9,114.5,4.9,114.5,6.3z"/>\n' +
'</g>\n' +
'</g>\n' +
'<g class="st1">\n' +
'<g>\n' +
'<g>\n' +
'<g>\n' +
'<path class="st2" d="M200.1,21.1H198V19h2.1V21.1z M200.1,32.9H198V22.6h2.1V32.9z"/>\n' +
'</g>\n' +
'<g>\n' +
'<g>\n' +
'<path class="st2" d="M212.5,22.6l-3,8.9c-0.5,1.5-1.4,1.6-2.2,1.6c-1.1,0-1.8-0.5-2.2-1.6l-2.5-7.4h-1v-1.5h2.6l2.6,8.3\n' +
'c0.1,0.4,0.2,0.6,0.5,0.6c0.3,0,0.4-0.2,0.5-0.6l2.6-8.3H212.5z"/>\n' +
'<path class="st2" d="M217.8,22.6c2.8,0,4.7,1.8,4.7,4.5v1.6c0,2.6-1.9,4.5-4.7,4.5c-2.8,0-4.7-1.8-4.7-4.5v-1.6\n' +
'C213,24.4,215,22.6,217.8,22.6 M217.8,31.4c1.7,0,2.7-1.3,2.7-2.8v-1.6c0-1.5-1-2.8-2.7-2.8c-1.8,0-2.7,1.3-2.7,2.8v1.6\n' +
'C215.1,30.2,216,31.4,217.8,31.4"/>\n' +
'<path class="st2" d="M239.6,22.9c-1.1-0.3-2.7-0.5-4-0.5c-2.8,0-4.6,1.8-4.6,4.6v1.1c0,2.9,1.7,4.7,4.6,4.7c0.1,0,0.6,0,0.8,0\n' +
'v-1.7c-0.1,0-0.7,0-0.8,0c-1.5,0-2.6-1.2-2.6-2.9v-1.1c0-1.8,1-2.9,2.6-2.9c0.7,0,1.7,0.1,2.1,0.1l0.1,0l0,8.6h2.1v-9.6\n' +
'C240,23.1,240,23,239.6,22.9"/>\n' +
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