ConfigRetriever.hpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
源码类别:
MySQL数据库
开发平台:
Visual C++
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- 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. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef ConfigRetriever_H
- #define ConfigRetriever_H
- #include <ndb_types.h>
- #include <mgmapi.h>
- #include <BaseString.hpp>
- /**
- * @class ConfigRetriever
- * @brief Used by nodes (DB, MGM, API) to get their config from MGM server.
- */
- class ConfigRetriever {
- public:
- ConfigRetriever(const char * _connect_string,
- Uint32 version, Uint32 nodeType);
- ~ConfigRetriever();
- int do_connect(int no_retries, int retry_delay_in_seconds, int verbose);
- /**
- * Get configuration for current node.
- *
- * Configuration is fetched from one MGM server configured in local config
- * file. The method loops over all the configured MGM servers and tries
- * to establish a connection. This is repeated until a connection is
- * established, so the function hangs until a connection is established.
- *
- * @return ndb_mgm_configuration object if succeeded,
- * NULL if erroneous local config file or configuration error.
- */
- struct ndb_mgm_configuration * getConfig();
- void resetError();
- int hasError();
- const char * getErrorString();
- /**
- * @return Node id of this node (as stated in local config or connectString)
- */
- Uint32 allocNodeId(int no_retries, int retry_delay_in_seconds);
- int setNodeId(Uint32 nodeid);
- /**
- * Get config using socket
- */
- struct ndb_mgm_configuration * getConfig(NdbMgmHandle handle);
- /**
- * Get config from file
- */
- struct ndb_mgm_configuration * getConfig(const char * file);
- /**
- * Verify config
- */
- bool verifyConfig(const struct ndb_mgm_configuration *, Uint32 nodeid);
- Uint32 get_mgmd_port() const;
- const char *get_mgmd_host() const;
- const char *get_connectstring(char *buf, int buf_sz) const;
- Uint32 get_configuration_nodeid() const;
- private:
- BaseString errorString;
- enum ErrorType {
- CR_NO_ERROR = 0,
- CR_ERROR = 1,
- CR_RETRY = 2
- };
- ErrorType latestErrorType;
- void setError(ErrorType, const char * errorMsg);
- Uint32 _ownNodeId;
- /*
- Uint32 m_mgmd_port;
- const char *m_mgmd_host;
- */
- Uint32 m_version;
- Uint32 m_node_type;
- NdbMgmHandle m_handle;
- };
- #endif