public void doSubscribe(final URL url, final NotifyListener listener) { String service = RedisRegistryUtil.toServicePath(url, root); RedisRegistryNotifier notifier = notifiers.get(service); if (notifier == null) { RedisRegistryNotifier newNotifier = new RedisRegistryNotifier(service, this); notifiers.putIfAbsent(service, newNotifier); notifier = notifiers.get(service); if (notifier == newNotifier) { notifier.start(); } } boolean success = false; RpcException exception = null; for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) { JedisPool jedisPool = entry.getValue(); try { Jedis jedis = jedisPool.getResource(); try { if (service.endsWith(Constants.ANY_VALUE)) { admin = true; Set<String> keys = jedis.keys(service); if (keys != null && keys.size() > 0) { Map<String, Set<String>> serviceKeys = RedisRegistryUtil.getServiceKeys(keys, root); for (Set<String> sk : serviceKeys.values()) { doNotify(jedis, sk, url, Arrays.asList(listener)); } } } else { doNotify( jedis, jedis.keys(service + Constants.PATH_SEPARATOR + Constants.ANY_VALUE), url, Arrays.asList(listener)); } success = true; break; // 只需读一个服务器的数据 } finally { jedisPool.returnResource(jedis); } } catch (Throwable t) { // 尝试下一个服务器 exception = new RpcException( "Failed to subscribe service from redis registry. registry: " + entry.getKey() + ", service: " + url + ", cause: " + t.getMessage(), t); } } if (exception != null) { if (success) { logger.warn(exception.getMessage(), exception); } else { throw exception; } } }