124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
/*
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Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef ConfigRetriever_H
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#define ConfigRetriever_H
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#include <ndb_types.h>
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#include <mgmapi.h>
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#include <BaseString.hpp>
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/**
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* @class ConfigRetriever
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* @brief Used by nodes (DB, MGM, API) to get their config from MGM server.
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*/
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class ConfigRetriever {
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public:
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// Deleter usable in std::unique for pointer from getConfig().
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class ConfigDeleter {
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public:
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void operator()(ndb_mgm_configuration* p);
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};
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ConfigRetriever(const char * _connect_string, int force_nodeid,
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Uint32 version, ndb_mgm_node_type nodeType,
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const char * _bind_address = 0,
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int timeout_ms = 30000);
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~ConfigRetriever();
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int do_connect(int no_retries, int retry_delay_in_seconds, int verbose);
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int disconnect();
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bool is_connected();
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/**
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* Get configuration for current node.
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*
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* Configuration is fetched from one MGM server configured in local config
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* file. The method loops over all the configured MGM servers and tries
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* to establish a connection. This is repeated until a connection is
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* established, so the function hangs until a connection is established.
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*
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* @return ndb_mgm_configuration object if succeeded,
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* NULL if erroneous local config file or configuration error.
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*/
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struct ndb_mgm_configuration * getConfig(Uint32 nodeid);
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void resetError();
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int hasError();
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const char * getErrorString();
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/**
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* @return Node id of this node (as stated in local config or connectString)
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*/
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Uint32 allocNodeId(int no_retries, int retry_delay_in_seconds);
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Uint32 allocNodeId(int no_retries, int retry_delay_in_seconds,
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int verbose, int& error);
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int setNodeId(Uint32 nodeid);
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Uint32 getNodeId();
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/**
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* Get config using socket
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*/
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struct ndb_mgm_configuration * getConfig(NdbMgmHandle handle);
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/**
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* Get config from file
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*/
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struct ndb_mgm_configuration * getConfig(const char * file);
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/**
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* Verify config
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*/
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bool verifyConfig(const struct ndb_mgm_configuration *, Uint32 nodeid);
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Uint32 get_mgmd_port() const;
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const char *get_mgmd_host() const;
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const char *get_connectstring(char *buf, int buf_sz) const;
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NdbMgmHandle get_mgmHandle() { return m_handle; }
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NdbMgmHandle* get_mgmHandlePtr() { return &m_handle; }
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void end_session(bool end) { m_end_session= end; }
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Uint32 get_configuration_nodeid() const;
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private:
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BaseString errorString;
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enum ErrorType {
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CR_NO_ERROR = 0,
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CR_ERROR = 1
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};
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ErrorType latestErrorType;
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void setError(ErrorType, const char * errorMsg);
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void setError(ErrorType, BaseString err);
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bool m_end_session;
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Uint32 m_version;
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ndb_mgm_node_type m_node_type;
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NdbMgmHandle m_handle;
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};
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#endif
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