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| <h1 id="java-chassis-spring-boot">java chassis 与 Spring Boot 集成介绍</h1> |
| <p><a href="https://projects.spring.io/spring-boot/">Spring Boot</a>可以让开发者能够更加快速的构建Spring应用。主要提供了如下功能：</p> |
| <ol> |
| <li> |
| <p>创建独立可执行的Spring应用。通过将应用程序打包为jar，就可以通过java -jar来执行应用程序。</p> |
| </li> |
| <li> |
| <p>内嵌Tomcat, Jetty等WEB服务器，而不需要开发者打包war。</p> |
| </li> |
| <li> |
| <p>提供starter简化maven依赖关系配置。</p> |
| </li> |
| </ol> |
| <p>将Spring Boot用于微服务开发，可以极大的简化开发者配置和部署。java-chassis提供了完善的的服务治理能力、良好的跨语言特性和高效的异步通信能力，通过使用java chassis，可以快速启用各种满足商业运维需要的功能。</p> |
| <p>开发者通常会以如下几种方式使用Spring Boot：</p> |
| <ol> |
| <li> |
| <p>JAVA应用方式：引入spring-boot-starter，开发普通JAVA应用，该应用不会启动WEB服务器。</p> |
| </li> |
| <li> |
| <p>Web开发方式：引入spring-boot-starter-web，开发Web应用，该应用会包含一个内嵌的Tomcat或者Jetty服务器，并且使用The Spring Web MVC framework（简称Spring MVC）开发REST接口。</p> |
| </li> |
| </ol> |
| <p>在两种情况下，都可以集成java chassis，原理图如下：</p> |
| <ul> |
| <li>JAVA应用方式</li> |
| </ul> |
| <p><img alt="" src="../assets/using-java-chassis-in-spring-boot-002.png" /></p> |
| <p>这种集成方式相对简单，相当于直接将java-chassis通过Spring Boot应用拉起，通过java-chassis 提供REST/RPC服务。</p> |
| <ul> |
| <li>Web开发方式</li> |
| </ul> |
| <p><img alt="" src="../assets/using-java-chassis-in-spring-boot-001.png" /></p> |
| <p>该集成方式的本质是将Spring MVC的DispatcherServlet替换为java chassis的RestServlet，通过java-chassis提供REST/RPC服务。</p> |
| <p>两种开发方式都会启用java chassis的全量功能，JAVA应用方式运行于独立的HTTP服务器（基于vert.x构建）上，性能上存在很大的优势。Web开发方式运行于Tomcat或者其他内置的Web服务器之上，作为一个Servlet接收请求，因此在开发过程中，可以使用Web容器提供的一些功能，比如提供页面服务，使用Filter等。当应用只需要提供REST服务，并且对性能要求很高的场景，建议使用JAVA应用方式。</p> |
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