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/* Copyright (c) 2003-2007 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; version 2 of the License.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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,
const char * _bind_address = 0,
int timeout_ms = 30000);
~ConfigRetriever();
int do_connect(int no_retries, int retry_delay_in_seconds, int verbose);
int disconnect();
/**
* 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;
NdbMgmHandle get_mgmHandle() { return m_handle; };
NdbMgmHandle* get_mgmHandlePtr() { return &m_handle; };
void end_session(bool end) { m_end_session= end; };
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;
bool m_end_session;
/*
Uint32 m_mgmd_port;
const char *m_mgmd_host;
*/
Uint32 m_version;
Uint32 m_node_type;
NdbMgmHandle m_handle;
};
#endif
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