《SpringBoot揭秘 快速构建微服务体系》读后感（三）

 

 

 

 

 

 

 

 

 

 

SpringApplication：SpringBoot程序启动的一站式解决方案

深入探索SpringApplication执行流程

因为书上的版本是1.2的，比较老，这里参考http://blog.csdn.net/zxzzxzzxz123/article/details/69941910

public ConfigurableApplicationContext run(String... args) {
        StopWatch stopWatch = new StopWatch();
        stopWatch.start();
        ConfigurableApplicationContext context = null;
        FailureAnalyzers analyzers = null;
        configureHeadlessProperty();
        SpringApplicationRunListeners listeners = getRunListeners(args);
        listeners.starting();
        try {
            ApplicationArguments applicationArguments = new DefaultApplicationArguments(
                    args);
            ConfigurableEnvironment environment = prepareEnvironment(listeners,
                    applicationArguments);
            Banner printedBanner = printBanner(environment);
            context = createApplicationContext();
            analyzers = new FailureAnalyzers(context);
            prepareContext(context, environment, listeners, applicationArguments,
                    printedBanner);
            refreshContext(context);
            afterRefresh(context, applicationArguments);
            listeners.finished(context, null);
            stopWatch.stop();
            if (this.logStartupInfo) {
                new StartupInfoLogger(this.mainApplicationClass)
                        .logStarted(getApplicationLog(), stopWatch);
            }
            return context;
        }
        catch (Throwable ex) {
            handleRunFailure(context, listeners, analyzers, ex);
            throw new IllegalStateException(ex);
        }
    }

 

SpringApplicationRunListener

SpringApplicationRunListener是一个只有SpringBoot应用的main方法执行过程中接收不同执行时点时间通知的监听者

ApplicationListener

ApplicationContextInitializer

 

CommandLineRunner