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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
package registry
import (
* -----------------------------------NOTICE---------------------------------------------
* If there is no special case, you'd better inherit BaseRegistry and implement the
* FacadeBasedRegistry interface instead of directly implementing the Registry interface.
* --------------------------------------------------------------------------------------
// Registry Extension - Registry
type Registry interface {
// Register is used for service provider calling, register services
// to registry. And it is also used for service consumer calling, register
// services cared about, for dubbo's admin monitoring.
Register(url common.URL) error
// UnRegister is required to support the contract:
// 1. If it is the persistent stored data of dynamic=false, the
// registration data can not be found, then the IllegalStateException
// is thrown, otherwise it is ignored.
// 2. Unregister according to the full url match.
// url Registration information, is not allowed to be empty, e.g:
// dubbo://
UnRegister(url common.URL) error
// Subscribe is required to support the contract:
// When creating new registry extension, pls select one of the
// following modes.
// Will remove in dubbogo version v1.1.0
// mode1: return Listener with Next function which can return
// subscribe service event from registry
// Deprecated!
// subscribe(event.URL) (Listener, error)
// Will replace mode1 in dubbogo version v1.1.0
// mode2: callback mode, subscribe with notify(notify listener).
Subscribe(*common.URL, NotifyListener) error
// UnSubscribe is required to support the contract:
// 1. If don't subscribe, ignore it directly.
// 2. Unsubscribe by full URL match.
// url Subscription condition, not allowed to be empty, e.g.
// consumer://
// listener A listener of the change event, not allowed to be empty
UnSubscribe(*common.URL, NotifyListener) error
// nolint
type NotifyListener interface {
// Notify supports notifications on the service interface and the dimension of the data type. When a list of
// events are passed in, it's considered as a complete list, on the other side, if one single event is
// passed in, then it's a incremental event. Pls. note when a list (instead of single event) comes,
// the impl of NotifyListener may abandon the accumulated result from previous notifications.
// Listener Deprecated!
type Listener interface {
// Next returns next service event once received
Next() (*ServiceEvent, error)
// Close closes this listener