spring boot启动源码分析 afterRefresh

 1     protected void afterRefresh(ConfigurableApplicationContext context,
 2             ApplicationArguments args) {
 3         callRunners(context, args);
 4     }
 5 
 6     private void callRunners(ApplicationContext context, ApplicationArguments args) {
 7         List<Object> runners = new ArrayList<Object>();
 8         runners.addAll(context.getBeansOfType(ApplicationRunner.class).values());
 9         runners.addAll(context.getBeansOfType(CommandLineRunner.class).values());
10         AnnotationAwareOrderComparator.sort(runners);
11         for (Object runner : new LinkedHashSet<Object>(runners)) {
12             if (runner instanceof ApplicationRunner) {
13                 callRunner((ApplicationRunner) runner, args);
14             }
15             if (runner instanceof CommandLineRunner) {
16                 callRunner((CommandLineRunner) runner, args);
17             }
18         }
19     }
20 
21     private void callRunner(ApplicationRunner runner, ApplicationArguments args) {
22         try {
23             (runner).run(args);
24         }
25         catch (Exception ex) {
26             throw new IllegalStateException("Failed to execute ApplicationRunner", ex);
27         }
28     }

上下文刷新结束后，能够实现ApplicationRunner或者CommandLineRunner接口来实现上下文成功初始化后的一些操做。

最终调用

1 listeners.finished(context, null);

通知全部监听器，上下文初始化结束。

 

applicationrunner commandlinerunner两种runner除了参数类型不同，其余的没有区别，执行顺序也是一块儿排序使用order控制。使用的排序规则是AnnotationAwareOrderComparator。