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120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2021, OpenNebula Project, OpenNebula Systems */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* 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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#ifndef REPLICA_MANAGER_H_
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#define REPLICA_MANAGER_H_
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#include <string>
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#include <map>
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#include <vector>
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class ReplicaThread;
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// Replication Manager. This is a generic replication manager it starts, stops
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// and send control events to replica threads.
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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class ReplicaManager
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{
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public:
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/**
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* Start the replication threads, one for each server in the zone
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*/
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void start_replica_threads(std::vector<int>& fids);
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/**
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* Stop the replication threads (leader becomes follower)
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*/
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void stop_replica_threads();
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/**
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* Triggers a replication event on the replica threads
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*/
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void replicate();
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/**
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* Triggers a replication event on the follower thread
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* @param follower id
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*/
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void replicate(int follower);
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/**
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* Deletes a replication thread for a follower (e.g. server deleted)
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* @param follower_id server id
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*/
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void delete_replica_thread(int follower_id);
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/**
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* Adds a replication thread for a follower (e.g. server add)
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* @param follower_id server id
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*/
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void add_replica_thread(int follower_id);
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protected:
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ReplicaManager(){};
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virtual ~ReplicaManager()
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{
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stop_replica_threads();
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};
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virtual ReplicaThread * thread_factory(int follower_id) = 0;
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private:
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/**
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* The replication thread pool
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*/
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std::map<int, ReplicaThread *> thread_pool;
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/**
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* @param server_id of the follower
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* @return pointer to the replica thread associated to a follower
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*/
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ReplicaThread * get_thread(int server_id);
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};
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// RaftReplicaManager to manage the raft replication thread pool
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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class RaftReplicaManager : public ReplicaManager
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{
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public:
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RaftReplicaManager():ReplicaManager(){};
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virtual ~RaftReplicaManager(){};
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private:
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ReplicaThread * thread_factory(int follower_id);
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};
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class HeartBeatManager : public ReplicaManager
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{
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public:
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HeartBeatManager():ReplicaManager(){};
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virtual ~HeartBeatManager(){};
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private:
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ReplicaThread * thread_factory(int follower_id);
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};
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#endif /*REPLICA_MANAGER_H_*/
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