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Posted to commits@servicecomb.apache.org by ni...@apache.org on 2017/12/12 09:18:10 UTC
[13/57] [partial] incubator-servicecomb-website git commit: Generated
the static pages for asf-site
http://git-wip-us.apache.org/repos/asf/incubator-servicecomb-website/blob/08e1b43f/content/docs/quick-start/index.html
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+
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+
+ </div>
+ </nav>
+ </div>
+ </div>
+</div>
+
+
+
+
+
+
+<div id="main" role="main">
+
+ <div class="sidebar sticky">
+
+ <div class="back-to-home">Home > <a href="/">ServiceComb</a></div>
+
+
+
+
+
+
+
+
+
+
+
+<nav class="nav__list">
+
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+ <ul class="nav__items">
+
+ <li>
+
+
+
+
+ <a href="/docs/quick-start/"><span class="nav__sub-title nav__sub-title-with-url">Quick Start</span></a>
+
+
+
+ </li>
+
+ <li>
+
+
+
+
+ <a href="/docs/quick-start-bmi/"><span class="nav__sub-title nav__sub-title-with-url">Develop microservice application in minutes</span></a>
+
+
+
+ </li>
+
+ <li>
+
+
+
+
+ <a href="/docs/quick-start-advance/"><span class="nav__sub-title nav__sub-title-with-url">Advance microservice development</span></a>
+
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+ <ul>
+
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+
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+ <li><a href="/docs/quick-start-advance/load-balance/" class="">Load Balance</a></li>
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+ <li><a href="/docs/quick-start-advance/distributed-tracing/" class="">Distributed Tracing</a></li>
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+ <a href="/docs/quick-start-dataconsistency/"><span class="nav__sub-title nav__sub-title-with-url">Data Consistency Solution</span></a>
+
+
+
+ </li>
+
+ </ul>
+</nav>
+
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+ </div>
+
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+ <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+ <meta itemprop="headline" content="Quick Start">
+ <meta itemprop="description" content="Introduce how to run microservice applications using ServiceComb">
+
+ <meta itemprop="dateModified" content="September 06, 2017">
+
+ <div class="page__inner-wrap">
+
+
+ <header>
+ <h1 class="page__title" itemprop="headline">Quick Start
+</h1>
+
+ </header>
+
+
+
+ <section class="page__content" itemprop="text">
+ <aside class="sidebar__right">
+<nav class="toc">
+ <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+ <li><a href="#install-java-development-environment" id="markdown-toc-install-java-development-environment">Install Java development environment</a></li>
+ <li><a href="#run-service-center" id="markdown-toc-run-service-center">Run Service Center</a></li>
+ <li><a href="#create-your-first-microservice-application" id="markdown-toc-create-your-first-microservice-application">Create your first microservice application</a></li>
+ <li><a href="#run-microservice-application" id="markdown-toc-run-microservice-application">Run microservice application</a></li>
+ <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+ </nav>
+</aside>
+
+<h2 id="install-java-development-environment">Install Java development environment</h2>
+
+<ul>
+ <li>
+ <p>Install Git, details can refer to <a href="https://git-scm.com/book/en/v2/Getting-Started-Installing-Git" target="_blank">Git Installing Guide</a>.</p>
+ </li>
+ <li>
+ <p>Install JDK 1.8, details can refer to <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">JDK Installing Guide</a>.</p>
+ </li>
+ <li>
+ <p>Install Maven 3.x, details can refer to <a href="https://maven.apache.org/install.html" target="_blank">Maven Installing Guide</a>.</p>
+ </li>
+ <li>
+ <p>Install ServiceComb Java Chassis(SDK) by executing the following commands.</p>
+
+ <div class="language-bash highlighter-rouge"><pre class="highlight"><code> git clone https://github.com/ServiceComb/ServiceComb-Java-Chassis.git
+ <span class="nb">cd </span>ServiceComb-Java-Chassis
+ mvn clean install -DskipTests
+</code></pre>
+ </div>
+ </li>
+</ul>
+
+<h2 id="run-service-center">Run Service Center</h2>
+<p><strong>Service Center</strong> enables capabilities of service registration and service discovery in <strong>ServiceComb</strong>. It can run inside docker.</p>
+<div class="language-bash highlighter-rouge"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run -d -p 30100:30100 servicecomb/service-center:latest
+</code></pre>
+</div>
+<p><em>Reference to <a href="/users/setup-environment/#运行service-center">service center deployment</a> to learn deploying Service Center as a local binary.</em></p>
+
+<h2 id="create-your-first-microservice-application">Create your first microservice application</h2>
+<p>Let's start the journey of microservice with a simple <strong>Body Mass Index(BMI)</strong> application. The <a href="https://en.wikipedia.org/wiki/Body_mass_index" target="_blank">BMI</a> is an attempt to quantify the amount of tissue mass in an individual. This application contains two separate microservices:</p>
+
+<ul>
+ <li>
+ <p><strong>BMI calculator service</strong>：A microservice provides calculation of BMI.</p>
+ </li>
+ <li>
+ <p><strong>Web service</strong>：A microservice provides both user interface and gateway service.</p>
+ </li>
+</ul>
+
+<p>The workflow of the application is shown as follows:<br />
+<img src="/assets/images/quick-start-sample-workflow-en.png" alt="workflow of BMI" class="align-center" /></p>
+
+<p>Note that the dotted lines indicate the process of service registration and discovery.</p>
+
+<h2 id="run-microservice-application">Run microservice application</h2>
+
+<ol>
+ <li>
+ <p>Enter BMI codes directory.</p>
+
+ <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="nb">cd </span>samples/bmi
+</code></pre>
+ </div>
+
+ <p><strong>Note</strong>: In windows development environment, the docker runs inside the virtual machine. The IP address of <strong>Service Center</strong> needs to be modified as the virtual machine's IP address. Modify the 2 configuration files [calculator|webapp]/src/main/resources/microservice.yaml, changed <a>http://127.0.0.1:30100</a> to <a>http://192.168.99.100:30100</a> , where 192.168.99.100 is the virtual machine's IP address.</p>
+ </li>
+ <li>
+ <p>Run microservices.</p>
+
+ <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="nb">cd </span>calculator; mvn spring-boot:run
+<span class="nb">cd </span>webapp; mvn spring-boot:run
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Verify the application. Visit <a>http://localhost:8889</a> in browser. Then input your height and weight to verify.</p>
+
+ <p><img src="/assets/images/bmi-interface.png" alt="BMI user interface" class="align-center" /></p>
+ </li>
+</ol>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+ <li>Learn how to <a href="/docs/quick-start-bmi/">develop microservice application in minutes</a>.</li>
+</ul>
+
+
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+ <p class="header">Resources</p>
+ <li><a href="/docs/quick-start/">Quick Start</a></li>
+ <li><a href="/users/user-guide/">User Guide</a></li>
+ <li><a href="/slides/">Slides</a></li>
+ <li><a href="/users/faq/">Common Questions</a></li>
+ </ul>
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+ <div class="col">
+ <ul>
+ <p class="header">Contribute</p>
+ <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/issues/new?title=Issue with _docs/quick-start.md">Report a Doc Issue</a></li>
+ <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/edit/master/_docs/quick-start.md">Edit This Page on Github</a></li>
+ <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
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+ <div class="col">
+ <ul class="social-icons">
+ <p class="header">Community</p>
+ <li>
+ <a href="https://groups.google.com/forum/#!forum/servicecomb-developers" target="_blank"><span class="group">Dev</span></a> |
+ <a href="https://groups.google.com/forum/#!forum/servicecomb-users" target="_blank">User</span></a>
+ </li>
+ <li>
+ <a href="http://github.com/ServiceComb" target="_blank"><span class="github">Github</span></a>
+ </li>
+ <li>
+ <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
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http://git-wip-us.apache.org/repos/asf/incubator-servicecomb-website/blob/08e1b43f/content/docs/seckill-development-journey-part-I/index.html
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+ <meta itemprop="headline" content="SecKill Development Journey (I)">
+ <meta itemprop="description" content="an introduction of how to build seckill demo project step by step">
+ <meta itemprop="datePublished" content="August 26, 2017">
+ <meta itemprop="dateModified" content="September 13, 2017">
+
+ <div class="page__inner-wrap">
+
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+ <header>
+ <h1 class="page__title" itemprop="headline">SecKill Development Journey (I)
+</h1>
+
+ <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i>
+
+
+
+
+ 2 minute read
+
+</p>
+
+ </header>
+
+
+
+ <section class="page__content" itemprop="text">
+ <h2 id="overview">Overview</h2>
+<p>SecKill is a demo project that our ServiceComb team try to build a micro-service architecture from the perspective of domain-driven design (<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>).</p>
+
+<h2 id="background">Background</h2>
+
+<p>SecKill idea comments from the Internet popular promotions, using coupons to obtain some discounts; because the number of coupons is limited, so we must provide a platform for everyone who wants to get it fair competition.</p>
+
+<p>As a demo project, so we don’t want make the SecKill too complicated; we just use the most primitive strategy - first come first get. It is quite simple if you want to implements other strategies by yourself.</p>
+
+<h2 id="first-design">First Design</h2>
+<p>Now let’s analyze requirement in customer bounded context:</p>
+<ol>
+ <li>Customer try to grab a coupon, SecKill return the coupon according to the coupon in inventory;</li>
+ <li>Customer cannot get the coupon anymore if he already send the request to the system.</li>
+ <li>Customer can query how many coupons he owned.</li>
+</ol>
+
+<p>Let’s go! what? you say this description is to simple? because they are no registration system, and promotion is how come, how to start? which coupon the customer request for? Is the discount all same? etc.</p>
+
+<p>Actually, we are accustomed to thinking a lot at the beginning, so some larger system, the design stage may be a few months, but this time you can’t consider too much, because we believe:</p>
+
+<ol>
+ <li>Over-design can’t guarantee fully meeting the demand after construction completed, the only constant is the demand is always changing, so don’t over-design;</li>
+ <li>The principle of the microservice architecture is that service provides single function, so each components(microservices) only need to provide small service, without having to design all the services in system one-time;</li>
+ <li>Should be solve the problem of the core domain as soon as possible.</li>
+</ol>
+
+<p>Then, we can follow the many principles of domain-driven design (<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>). The core task of the design process is identify entities, value objects, services and other elements, and further search aggregation; because our requirements are very simple, so it’s easy find them out:</p>
+<ul>
+ <li>Entities:Promotion</li>
+ <li>Value-Object:Coupon,PromotionEvent</li>
+ <li>Domain Service:SecKill</li>
+</ul>
+
+<p>Now we can find the aggregation between them, separated two microservice, now we direct use MySQL database for shared data (although microservice recommend use independent storage for each, we can revisit it in the next iteration)</p>
+<ol>
+ <li>Command : for SecKill domain service</li>
+ <li>Query : for query Coupon Value-Object</li>
+</ol>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-arth-en.png" alt="Fig-1 Architecture" class="align-center" /></p>
+
+<h2 id="core-domain-implement">Core Domain Implement</h2>
+<p>The source code at <a href="https://github.com/ServiceComb/seckill">Github</a>, Welcome to Watch and Star : )</p>
+<h3 id="implement-of-command-micro-service">Implement of Command micro-service</h3>
+<p>We create two class “SecKillCommandService” and “SecKillPersistentRunner” to accept seckill request and persist seckill result, considering persistence is slow, we use BlockQueue temporary cache requests. another class “SecKillCommandRestController” act as Endpoint; ServiceComb support a variety of programming models and communication model, also well support Spring Boot, and easy deploy to Huawei cloud.</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-command-en.png" alt="Fig-2 Command micro-service components" class="align-center" /></p>
+
+<h3 id="implement-of-query-microservice">Implement of Query microService</h3>
+<p>Query logic is relatively simple, because PromotionEvent is Value-Object, we use PromotionEvent records to get Coupon Value-Object, you can read the source code and understand this process.</p>
+
+<h2 id="support-domain-implement">Support Domain Implement</h2>
+<p>As promotion is entity and seckill need it as preconditions, we need build and manage it in another domain, because it’s not so urgent at current stage, we can use Spring injection autowire fix objects.</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-spring.png" alt="Fig-3 Support domain object injection" class="align-center" /></p>
+
+<h2 id="function-verification">Function Verification</h2>
+<p>Finally, we use PostMan to check completed functions, Please ensure request body fill with JSON format, and set Content-Type to application/json:</p>
+
+<h3 id="request-seckill">Request SecKill</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-request-seckill.png" alt="Fig-4 Request seckill" class="align-center" /></p>
+
+<h3 id="query-owned-coupons">Query owned coupons</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-query-coupons.png" alt="Fig-5 Query owned coupons" class="align-center" /></p>
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+ <meta itemprop="description" content="an introduction how to build seckill demo project step by step">
+ <meta itemprop="datePublished" content="August 30, 2017">
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+ <header>
+ <h1 class="page__title" itemprop="headline">SecKill Develop Journey (II)
+</h1>
+
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+
+
+
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+ 1 minute read
+
+</p>
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+ <section class="page__content" itemprop="text">
+ <p><a href="/docs/seckill-development-journey-part/">Previous article</a> We only built a core function seckill demo, this article we will gradually improve more features in order to let it had complete function.</p>
+
+<h2 id="problems">Problems</h2>
+<p>Review what we has been done, we can find that:</p>
+<ol>
+ <li>Service for Promotion entity is not provided (inject by Spring);</li>
+ <li>Lack some base check and features, include:
+ <ul>
+ <li>One customer can only grab one coupon per promotion</li>
+ <li>Support multi promotion activing (discount of each promotion is different)</li>
+ </ul>
+ </li>
+ <li>If Command micro-service down, it will recovery all uncompleted promotions immediately before start-up again.</li>
+</ol>
+
+<p>Maybe you would say that customer management and customer login function are not listed? Indeed, the customer is indispensable in our scenario, in order to simply design, we don’t include login and token authentication etc., if you are interesting about this, you can see ServiceComb’s <a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop">Company</a> demo application to get more information.</p>
+
+<h2 id="improvement-design">Improvement Design</h2>
+<p>For entity, domain-driven design (<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>) recommended to use a separate interface, so we design a new Admin micro-service to provide service:</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-arth-en.png" alt="Fig-1 Architecture after Admin micro-service added" class="align-center" /></p>
+
+<h2 id="improvement-implement">Improvement Implement</h2>
+<h3 id="implement-of-admin-micro-service">Implement of Admin micro-service</h3>
+<p>Admin micro-service only provide services for promotion entity, we can map this function to REST method:</p>
+<ul>
+ <li>New promotion map to Post;</li>
+ <li>Modify promotion map to Put; </li>
+ <li>Query promotion map to Get; </li>
+ <li>
+ <p>Delete promotion map to Delete. </p>
+
+ <p>To match current requirement we only need implement Post and Get, In addition, already started promotion should not be able to modify, so we increased the corresponding check.</p>
+ </li>
+</ul>
+
+<h3 id="new-check-and-features-implement">New check and features Implement</h3>
+<p>Add a HashSet per promotion to check whether customer had grab coupon; <br />
+ Add “SecKillPromotionBootstrap” class as promotion bootstrap manager for support multi active, “SecKillCommandService” and “SecKillPersistentRunner” now managed(create) by it。</p>
+
+<h3 id="command-micro-service-auto-recovery-implement">Command micro-service auto recovery Implement</h3>
+<p>Add “SecKillRecoveryService” class to check state of promotion, uncomplement promotions whether unstart or activing all need check by it to init start-up information including left coupons, grabbed customers list, etc.</p>
+
+<h2 id="function-verification">Function Verification</h2>
+<p>Finally, we use PostMan to check completed functions, Please ensure request body fill with JSON format, and set Content-Type to application/json：</p>
+<h3 id="create-promotion">Create Promotion</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-create-promotion.png" alt="Fig-2 Create promotion" class="align-center" /></p>
+
+<h3 id="query-activing-promotions">Query Activing Promotions</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-query-active-promotion.png" alt="Fig-3 Query activing promotions" class="align-center" /></p>
+
+<h3 id="reject-duplicate-grab">Reject duplicate Grab</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-reject-duplicate-grab.png" alt="Fig-4 Reject duplicate grab" class="align-center" /></p>
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+ ga('create', 'UA-101622733-1', 'auto');
+ ga('send', 'pageview');
+</script>
+
+
+
+
+
+
+
+
+ <script>
+ (function ($) {
+ var $comments = $('.js-comments');
+
+ $('#new_comment').submit(function () {
+ var form = this;
+
+ $(form).addClass('disabled');
+ $('#comment-form-submit').html('<i class="fa fa-spinner fa-spin fa-fw"></i> Loading...');
+
+ $.ajax({
+ type: $(this).attr('method'),
+ url: $(this).attr('action'),
+ data: $(this).serialize(),
+ contentType: 'application/x-www-form-urlencoded',
+ success: function (data) {
+ $('#comment-form-submit').html('Submitted');
+ $('.page__comments-form .js-notice').removeClass('notice--danger');
+ $('.page__comments-form .js-notice').addClass('notice--success');
+ showAlert('Thanks for your comment! It will show on the site once it has been approved.');
+ },
+ error: function (err) {
+ console.log(err);
+ $('#comment-form-submit').html('Submit Comment');
+ $('.page__comments-form .js-notice').removeClass('notice--success');
+ $('.page__comments-form .js-notice').addClass('notice--danger');
+ showAlert('Sorry, there was an error with your submission. Please make sure all required fields have been completed and try again.');
+ $(form).removeClass('disabled');
+ }
+ });
+
+ return false;
+ });
+
+ function showAlert(message) {
+ $('.page__comments-form .js-notice').removeClass('hidden');
+ $('.page__comments-form .js-notice-text').html(message);
+ }
+ })(jQuery);
+ </script>
+
+
+
+
+
+
+
+ </body>
+</html>