服務網關zuul之七：zuul中的動態刷新路由配置

《spring擴展點之三：Spring 的監聽事件 ApplicationListener 和 ApplicationEvent 用法，在spring啟動后做些事情》

《服務網關zuul之七：zuul中的動態刷新路由配置》

《ApplicationEvent事件機制源碼分析》

在spring-cloud-netflix-core-1.4.4.RELEASE.jar中org.springframework.cloud.netflix.zuul.RoutesRefreshedEvent.java

@SuppressWarnings("serial")
public class RoutesRefreshedEvent extends ApplicationEvent {

    private RouteLocator locator;

    public RoutesRefreshedEvent(RouteLocator locator) {
        super(locator);
        this.locator = locator;
    }

    public RouteLocator getLocator() {
        return this.locator;
    }

}

在spring-cloud-netflix-core-1.4.4.RELEASE-sources.jar中的org.springframework.cloud.netflix.zuul.zuulZuulServerAutoConfiguration.java配置了監聽事件。

    private static class ZuulRefreshListener
            implements ApplicationListener<ApplicationEvent> {

        @Autowired
        private ZuulHandlerMapping zuulHandlerMapping;

        private HeartbeatMonitor heartbeatMonitor = new HeartbeatMonitor();

        @Override
        public void onApplicationEvent(ApplicationEvent event) {
            if (event instanceof ContextRefreshedEvent
                    || event instanceof RefreshScopeRefreshedEvent
                    || event instanceof RoutesRefreshedEvent) {
                this.zuulHandlerMapping.setDirty(true);
            }
            else if (event instanceof HeartbeatEvent) {
                if (this.heartbeatMonitor.update(((HeartbeatEvent) event).getValue())) {
                    this.zuulHandlerMapping.setDirty(true);
                }
            }
        }

    }

關於spring的ApplicationEvent見《spring擴展點之三：Spring 的監聽事件 ApplicationListener 和 ApplicationEvent 用法，在spring啟動后做些事情》