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82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright 2015 Cloudius Systems
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*
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* Modified by Cloudius Systems
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*/
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#pragma once
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#include "gms/inet_address.hh"
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namespace service {
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/**
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* Interface on which interested parties can be notified of high level endpoint
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* state changes.
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*
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* Note that while IEndpointStateChangeSubscriber notify about gossip related
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* changes (IEndpointStateChangeSubscriber.onJoin() is called when a node join
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* gossip), this interface allows to be notified about higher level events.
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*/
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class endpoint_lifecycle_subscriber {
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public:
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virtual ~endpoint_lifecycle_subscriber()
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{ }
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/**
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* Called when a new node joins the cluster, i.e. either has just been
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* bootstrapped or "instajoins".
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*
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* @param endpoint the newly added endpoint.
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*/
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virtual void on_join_cluster(const gms::inet_address& endpoint) = 0;
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/**
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* Called when a new node leave the cluster (decommission or removeToken).
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*
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* @param endpoint the endpoint that is leaving.
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*/
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virtual void on_leave_cluster(const gms::inet_address& endpoint) = 0;
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/**
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* Called when a node is marked UP.
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*
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* @param endpoint the endpoint marked UP.
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*/
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virtual void on_up(const gms::inet_address& endpoint) = 0;
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/**
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* Called when a node is marked DOWN.
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*
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* @param endpoint the endpoint marked DOWN.
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*/
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virtual void on_down(const gms::inet_address& endpoint) = 0;
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/**
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* Called when a node has moved (to a new token).
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*
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* @param endpoint the endpoint that has moved.
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*/
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virtual void on_move(const gms::inet_address& endpoint) = 0;
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};
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}
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