rm old sync code

include/libs/sync/sync.h

-/*
- * Copyright (c) 2019 TAOS Data, Inc. <cli@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _TD_LIBS_SYNC_H
-#define _TD_LIBS_SYNC_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <stdint.h>
-#include "taosdef.h"
-
-typedef int32_t  SyncNodeId;
-typedef int32_t  SyncGroupId;
-typedef int64_t  SyncIndex;
-typedef uint64_t SyncTerm;
-
-typedef enum {
-  TAOS_SYNC_STATE_FOLLOWER = 0,
-  TAOS_SYNC_STATE_CANDIDATE = 1,
-  TAOS_SYNC_STATE_LEADER = 2,
-} ESyncState;
-
-typedef struct {
-  void*  data;
-  size_t len;
-} SSyncBuffer;
-
-typedef struct {
-  SyncNodeId nodeId;
-  uint16_t   nodePort;                 // node sync Port
-  char       nodeFqdn[TSDB_FQDN_LEN];  // node FQDN
-} SNodeInfo;
-
-typedef struct {
-  int32_t   selfIndex;
-  int32_t   replica;
-  SNodeInfo nodeInfo[TSDB_MAX_REPLICA];
-} SSyncCluster;
-
-typedef struct {
-  int32_t   selfIndex;
-  int32_t   replica;
-  SNodeInfo node[TSDB_MAX_REPLICA];
-  ESyncState role[TSDB_MAX_REPLICA];
-} SNodesRole;
-
-typedef struct SSyncFSM {
-  void* pData;
-
-  // apply committed log, bufs will be free by sync module
-  int32_t (*applyLog)(struct SSyncFSM* fsm, SyncIndex index, const SSyncBuffer* buf, void* pData);
-
-  // cluster commit callback
-  int32_t (*onClusterChanged)(struct SSyncFSM* fsm, const SSyncCluster* cluster, void* pData);
-
-  // fsm return snapshot in ppBuf, bufs will be free by sync module
-  // TODO: getSnapshot SHOULD be async?
-  int32_t (*getSnapshot)(struct SSyncFSM* fsm, SSyncBuffer** ppBuf, int32_t* objId, bool* isLast);
-
-  // fsm apply snapshot with pBuf data
-  int32_t (*applySnapshot)(struct SSyncFSM* fsm, SSyncBuffer* pBuf, int32_t objId, bool isLast);
-
-  // call when restore snapshot and log done
-  int32_t (*onRestoreDone)(struct SSyncFSM* fsm);
-
-  void (*onRollback)(struct SSyncFSM* fsm, SyncIndex index, const SSyncBuffer* buf);
-
-  void (*onRoleChanged)(struct SSyncFSM* fsm, const SNodesRole* pRole);
-
-} SSyncFSM;
-
-typedef struct SSyncLogStore {
-  void* pData;
-
-  // write log with given index
-  int32_t (*logWrite)(struct SSyncLogStore* logStore, SyncIndex index, SSyncBuffer* pBuf);
-
-  /** 
-   * read log from given index(included) with limit, return the actual num in nBuf,
-   * pBuf will be free in sync module
-   **/
-  int32_t (*logRead)(struct SSyncLogStore* logStore, SyncIndex index, int limit,
-                      SSyncBuffer* pBuf, int* nBuf);
-
-  // mark log with given index has been commtted
-  int32_t (*logCommit)(struct SSyncLogStore* logStore, SyncIndex index);
-
-  // prune log before given index(not included)
-  int32_t (*logPrune)(struct SSyncLogStore* logStore, SyncIndex index);
-
-  // rollback log after given index(included)
-  int32_t (*logRollback)(struct SSyncLogStore* logStore, SyncIndex index);
-
-  // return last index of log
-  SyncIndex (*logLastIndex)(struct SSyncLogStore* logStore);
-} SSyncLogStore;
-
-typedef struct SStateManager {
-  void* pData;
-
-  // save serialized server state data, buffer will be free by Sync
-  int32_t (*saveServerState)(struct SStateManager* stateMng, const char* buffer, int n);
-
-  // read serialized server state data, buffer will be free by Sync
-  int32_t (*readServerState)(struct SStateManager* stateMng, char** ppBuffer, int* n);
-
-  // save serialized cluster state data, buffer will be free by Sync
-  void (*saveClusterState)(struct SStateManager* stateMng, const char* buffer, int n);
-
-  // read serialized cluster state data, buffer will be free by Sync
-  int32_t (*readClusterState)(struct SStateManager* stateMng, char** ppBuffer, int* n);
-} SStateManager;
-
-typedef struct {
-  SyncGroupId   vgId;
-  SyncIndex     appliedIndex;
-  SSyncCluster  syncCfg;
-  SSyncFSM      fsm;
-  SSyncLogStore logStore;
-  SStateManager stateManager;
-} SSyncInfo;
-
-struct SSyncNode;
-typedef struct SSyncNode SSyncNode;
-
-int32_t syncInit();
-void    syncCleanUp();
-
-SSyncNode* syncStart(const SSyncInfo*);
-void       syncReconfig(const SSyncNode*, const SSyncCluster*);
-void       syncStop(const SSyncNode*);
-
-int32_t syncPropose(SSyncNode* syncNode, const SSyncBuffer* pBuf, void* pData, bool isWeak);
-
-int32_t syncAddNode(SSyncNode syncNode, const SNodeInfo *pNode);
-
-int32_t syncRemoveNode(SSyncNode syncNode, const SNodeInfo *pNode);
-
-extern int32_t sDebugFlag;
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_LIBS_SYNC_H*/