浅析Tomcat的工作原理
发布时间：2023-02-20 10:53:15 所属栏目：Tomcat 来源：互联网
导读：SpringBoot 就像一条巨蟒，慢慢缠绕着我们，使我们麻痹。不得不承认，使用了 SpringBoot 确实提高了工作效率，但同时也让我们遗忘了很多技能。刚入社会的时候，我还是通过 Tomcat 手动部署 JavaWeb 项目，还经常对 Tomcat 进行性能调优。除此之外，还需要自
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this.onRefresh(); this.registerListeners(); this.finishBeanFactoryInitialization(beanFactory); this.finishRefresh(); 从 onRefresh 方法点进去，找到 ServletWebServerApplicationContext 的实现方法。在这里终于看到了希望。 protected void onRefresh() { super.onRefresh(); try { this.createWebServer(); } catch (Throwable var2) { throw new ApplicationContextException("Unable to start web server", var2); } } 从 createWebServer 方法点进去，找到从工厂类中获取 WebServer的代码。 if (webServer == null && servletContext == null) { ServletWebServerFactory factory = this.getWebServerFactory(); // 获取 web server this.webServer = factory.getWebServer(new ServletContextInitializer[]{this.getSelfInitializer()}); } else if (servletContext != null) { try { // 启动 web server this.getSelfInitializer().onStartup(servletContext); } catch (ServletException var4) { throw new ApplicationContextException("Cannot initialize servlet context", var4); } } 从 getWebServer 方法点进去，找到 TomcatServletWebServerFactory 的实现方法，与之对应的还有 Jetty 和 Undertow。这里配置了基本的连接器、引擎、虚拟站点等配置。 public WebServer getWebServer(ServletContextInitializer... initializers) { Tomcat tomcat = new Tomcat(); File baseDir = this.baseDirectory != null ? this.baseDirectory : this.createTempDir("tomcat"); tomcat.setBaseDir(baseDir.getAbsolutePath()); Connector connector = new Connector(this.protocol); tomcat.getService().addConnector(connector); this.customizeConnector(connector); tomcat.setConnector(connector); tomcat.getHost().setAutoDeploy(false); this.configureEngine(tomcat.getEngine()); Iterator var5 = this.additionalTomcatConnectors.iterator(); while(var5.hasNext()) { Connector additionalConnector = (Connector)var5.next(); tomcat.getService().addConnector(additionalConnector); } this.prepareContext(tomcat.getHost(), initializers); return this.getTomcatWebServer(tomcat); } 服务启动后会打印日志 o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8900 (http) o.apache.catalina.core.StandardService : Starting service [Tomcat] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.34 o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal ... o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 16858 ms （编辑：十堰站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
