mirror of
https://github.com/MariaDB/server.git
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116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
/* Copyright (C) 2003 MySQL AB
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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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 <Properties.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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ConfigRetriever();
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ConfigRetriever(const int id, const char* remoteHost, const int port);
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~ConfigRetriever();
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/**
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* Read local config
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* @return Own node id, -1 means fail
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*/
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int init(bool onlyNodeId = false);
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/**
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* Get configuration for current (nodeId given in local config file) 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 Properties object if succeeded,
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* NULL if erroneous local config file or configuration error.
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*/
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class Properties * getConfig(const char * nodeType, int versionId);
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const char * getErrorString();
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/**
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* Sets connectstring which can be used instead of local config file
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*/
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void setConnectString(const char * connectString);
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/**
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* Sets name of local config file (usually not needed)
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*/
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void setLocalConfigFileName(const char * connectString);
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/**
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* Sets connectstring which can be used instead of local config file
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* environment variables and Ndb.cfg has precidence over this
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*/
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void setDefaultConnectString(const char * defaultConnectString);
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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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inline Uint32 getOwnNodeId() { return _ownNodeId; }
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/**
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* Get configuration object
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*/
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class Properties * getConfig(int versionId);
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/**
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* Get config using socket
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*/
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class Properties * getConfig(const char * mgmhost, unsigned int port,
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Uint32 nodeId, int versionId);
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/**
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* Get config from file
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*/
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class Properties * getConfig(const char * filename, Uint32 nodeId,
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int versionId);
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private:
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char * errorString;
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enum ErrorType {
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CR_ERROR = 0,
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CR_RETRY = 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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/**
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* Verifies that received configuration is correct
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*/
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bool verifyProperties(const char* nodeType, Properties *p,
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Uint32 nodeId, int versionId);
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char * _localConfigFileName;
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struct LocalConfig * _localConfig;
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int _ownNodeId;
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char * m_connectString;
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char * m_defaultConnectString;
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};
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#endif
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