Examples with ResourceEventListener com.tencent.polaris.api.plugin.registry.ResourceEventListener used on opensource projects

Example 1 with ResourceEventListener

use of com.tencent.polaris.api.plugin.registry.ResourceEventListener in project polaris-java by polarismesh.

the class CacheObject method onEventUpdate.

@Override
public boolean onEventUpdate(ServerEvent event) {
    ServiceEventKey serviceEventKey = event.getServiceEventKey();
    PolarisException error = event.getError();
    remoteUpdated.set(true);
    boolean svcDeleted = false;
    Collection<ResourceEventListener> resourceEventListeners = registry.getResourceEventListeners();
    if (null != error) {
        // 收取消息有出错
        RegistryCacheValue registryCacheValue = loadValue(false);
        // 没有服务信息直接删除
        if (error.getCode() == ErrorCode.SERVICE_NOT_FOUND) {
            if (deleted.compareAndSet(false, true)) {
                registry.removeCache(serviceEventKey);
                for (ResourceEventListener listener : resourceEventListeners) {
                    listener.onResourceDeleted(svcEventKey, registryCacheValue);
                }
                svcDeleted = true;
            }
        } else {
            LOG.error(String.format("received error notify for service %s", serviceEventKey), error);
        }
    } else {
        Object message = event.getValue();
        RegistryCacheValue cachedValue = value.get();
        CachedStatus cachedStatus = cacheHandler.compareMessage(cachedValue, message);
        if (cachedStatus == CachedStatus.CacheChanged || cachedStatus == CachedStatus.CacheNotExists) {
            LOG.info("OnServiceUpdate: cache {} is pending to update", svcEventKey);
            this.registry.saveMessageToFile(serviceEventKey, (Message) message);
            RegistryCacheValue newCachedValue = cacheHandler.messageToCacheValue(cachedValue, message, false);
            setValue(newCachedValue);
            if (cachedStatus == CachedStatus.CacheChanged) {
                for (ResourceEventListener listener : resourceEventListeners) {
                    listener.onResourceUpdated(svcEventKey, cachedValue, newCachedValue);
                }
            }
        } else if (cachedStatus == CachedStatus.CacheEmptyButNoData) {
            LOG.error("OnServiceUpdate: {} is empty, but discover returns no data", svcEventKey);
        }
        boolean newRemoteCache = null == cachedValue || cachedValue.isLoadedFromFile();
        if (newRemoteCache && serviceEventKey.getEventType() == EventType.INSTANCE) {
            // 设置就绪状态
            registry.setServerServiceReady(serviceEventKey);
        }
    }
    synchronized (lock) {
        if (error != null && ErrorCode.SERVICE_NOT_FOUND.equals(error.getCode())) {
            notifyEvent(null);
        }
        notifyEvent(error);
    }
    return svcDeleted;
}