springcloud之eureka server启动原理

/org/springframework/cloud/spring-cloud-netflix-eureka-server/2.1.0.RELEASE/spring-cloud-netflix-eureka-server-2.1.0.RELEASE.jar!/META-INF/spring.factories中 

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\ org.springframework.cloud.netflix.eureka.server.EurekaServerAutoConfiguration

进入EurekaServerAutoConfiguration类,看到

@Bean
    @ConditionalOnProperty(
        prefix = "eureka.dashboard",
        name = {"enabled"},
        matchIfMissing = true
    )
    public EurekaController eurekaController() {
        return new EurekaController(this.applicationInfoManager);
    }



    @Bean
    public Application jerseyApplication(Environment environment, ResourceLoader resourceLoader) {
        ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false, environment);
        provider.addIncludeFilter(new AnnotationTypeFilter(Path.class));
        provider.addIncludeFilter(new AnnotationTypeFilter(Provider.class));
        Set<Class<?>> classes = new HashSet();
        String[] var5 = EUREKA_PACKAGES;
        int var6 = var5.length;

        for(int var7 = 0; var7 < var6; ++var7) {
            String basePackage = var5[var7];
            Set<BeanDefinition> beans = provider.findCandidateComponents(basePackage);
            Iterator var10 = beans.iterator();

            while(var10.hasNext()) {
                BeanDefinition bd = (BeanDefinition)var10.next();
                Class<?> cls = ClassUtils.resolveClassName(bd.getBeanClassName(), resourceLoader.getClassLoader());
                classes.add(cls);
            }
        }

        Map<String, Object> propsAndFeatures = new HashMap();
        propsAndFeatures.put("com.sun.jersey.config.property.WebPageContentRegex", "/eureka/(fonts|images|css|js)/.*");
        DefaultResourceConfig rc = new DefaultResourceConfig(classes);
        rc.setPropertiesAndFeatures(propsAndFeatures);
        return rc;
    }

进入EurekaController类,作用:对控制面板页面的跳转的controller层的web对象

@Controller
@RequestMapping({"${eureka.dashboard.path:/}"})
public class EurekaController {
    @Value("${eureka.dashboard.path:/}")
    private String dashboardPath = "";
    ...
    @RequestMapping(
        value = {"/lastn"},
        method = {RequestMethod.GET}
    )
    public String lastn(HttpServletRequest request, Map<String, Object> model) {
        this.populateBase(request, model);
        PeerAwareInstanceRegistryImpl registry = (PeerAwareInstanceRegistryImpl)this.getRegistry();
        ArrayList<Map<String, Object>> lastNCanceled = new ArrayList();
        List<Pair<Long, String>> list = registry.getLastNCanceledInstances();
        Iterator var6 = list.iterator();

        while(var6.hasNext()) {
            Pair<Long, String> entry = (Pair)var6.next();
            lastNCanceled.add(this.registeredInstance((String)entry.second(), (Long)entry.first()));
        }

        model.put("lastNCanceled", lastNCanceled);
        list = registry.getLastNRegisteredInstances();
        ArrayList<Map<String, Object>> lastNRegistered = new ArrayList();
        Iterator var10 = list.iterator();

        while(var10.hasNext()) {
            Pair<Long, String> entry = (Pair)var10.next();
            lastNRegistered.add(this.registeredInstance((String)entry.second(), (Long)entry.first()));
        }

        model.put("lastNRegistered", lastNRegistered);
        return "eureka/lastn";
    }

jerseyApplication:初始化jersey的有关配置,通过jersey快速搭建满足restful的web程序,看到

EUREKA_PACKAGES点进去

private static final String[] EUREKA_PACKAGES = new String[]{"com.netflix.discovery", "com.netflix.eureka"};

扫描{"com.netflix.discovery", "com.netflix.eureka"}包下的

@Path @Provider,@Produces注解