Examples with InstancesChangeEvent com.alibaba.nacos.client.naming.event.InstancesChangeEvent used on opensource projects

Example 1 with InstancesChangeEvent

use of com.alibaba.nacos.client.naming.event.InstancesChangeEvent in project muses by acgist.

the class ShutdownListener method init.

@PostConstruct
public void init() {
    if (!this.shutdownEnable) {
        log.info("服务没有配置自动关机：{}", this.serviceName);
        return;
    }
    log.info("启动服务关机配置：{}-{}", this.serviceName, this.shutdownGracefully);
    NotifyCenter.registerSubscriber(new Subscriber<InstancesChangeEvent>() {

        /**
         * 锁
         */
        private final Lock lock = new ReentrantLock();

        /**
         * 条件
         */
        private final Condition condition = this.lock.newCondition();

        @Override
        public void onEvent(InstancesChangeEvent event) {
            final Optional<Instance> optional = event.getHosts().stream().filter(ShutdownListener.this::self).findFirst().or(ShutdownListener.this::findSelf);
            if (optional.isPresent()) {
                this.up();
            } else {
                this.down();
            }
        }

        /**
         * 启动
         */
        private void up() {
            if (!ShutdownListener.this.shutdown) {
                log.debug("实例有效：已经生效：{}", ShutdownListener.this.serviceName);
                return;
            }
            log.debug("实例有效：重置关闭事件：{}", ShutdownListener.this.serviceName);
            ShutdownListener.this.shutdown = false;
            try {
                this.lock.lock();
                this.condition.signalAll();
            } finally {
                this.lock.unlock();
            }
        }

        /**
         * 关闭
         */
        private void down() {
            if (ShutdownListener.this.shutdown) {
                log.debug("实例无效：已经启动关闭事件：{}", ShutdownListener.this.serviceName);
                return;
            }
            log.debug("实例无效：启动关闭事件：{}-{}", ShutdownListener.this.serviceName, ShutdownListener.this.shutdownGracefully);
            ShutdownListener.this.shutdown = true;
            ShutdownListener.this.taskExecutor.execute(() -> {
                try {
                    this.lock.lock();
                    final long remaing = this.condition.awaitNanos(TimeUnit.SECONDS.toNanos(ShutdownListener.this.shutdownGracefully));
                    if (ShutdownListener.this.shutdown) {
                        log.info("实例无效：关闭实例：{}", ShutdownListener.this.serviceName);
                        // 关闭NacosServiceManager.nacosServiceShutDown()会出现空指针异常：2021-08以后版本已经修复
                        // 阻塞关闭：不用再次等待
                        ShutdownListener.this.context.close();
                        // System.exit(0);
                        // 强制关机
                        Runtime.getRuntime().halt(0);
                    } else {
                        log.debug("实例有效：忽略关闭事件：{}-{}", ShutdownListener.this.serviceName, TimeUnit.NANOSECONDS.toSeconds(remaing));
                    }
                } catch (InterruptedException e) {
                    log.error("关闭实例异常", e);
                } finally {
                    this.lock.unlock();
                }
            });
        }

        @Override
        public Class<? extends Event> subscribeType() {
            return InstancesChangeEvent.class;
        }
    });
}

Example 2 with InstancesChangeEvent

use of com.alibaba.nacos.client.naming.event.InstancesChangeEvent in project nacos by alibaba.

the class ServiceInfoHolder method processServiceInfo.

/**
 * Process service info.
 *
 * @param serviceInfo new service info
 * @return service info
 */
public ServiceInfo processServiceInfo(ServiceInfo serviceInfo) {
    String serviceKey = serviceInfo.getKey();
    if (serviceKey == null) {
        return null;
    }
    ServiceInfo oldService = serviceInfoMap.get(serviceInfo.getKey());
    if (isEmptyOrErrorPush(serviceInfo)) {
        // empty or error push, just ignore
        return oldService;
    }
    serviceInfoMap.put(serviceInfo.getKey(), serviceInfo);
    boolean changed = isChangedServiceInfo(oldService, serviceInfo);
    if (StringUtils.isBlank(serviceInfo.getJsonFromServer())) {
        serviceInfo.setJsonFromServer(JacksonUtils.toJson(serviceInfo));
    }
    MetricsMonitor.getServiceInfoMapSizeMonitor().set(serviceInfoMap.size());
    if (changed) {
        NAMING_LOGGER.info("current ips:({}) service: {} -> {}", serviceInfo.ipCount(), serviceInfo.getKey(), JacksonUtils.toJson(serviceInfo.getHosts()));
        NotifyCenter.publishEvent(new InstancesChangeEvent(serviceInfo.getName(), serviceInfo.getGroupName(), serviceInfo.getClusters(), serviceInfo.getHosts()));
        DiskCache.write(serviceInfo, cacheDir);
    }
    return serviceInfo;
}