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109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
/* Copyright (c) 2006, 2010, 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 as published by
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the Free Software Foundation; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef RPL_REPORTING_H
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#define RPL_REPORTING_H
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#include "my_sys.h" /* loglevel */
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/**
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Maximum size of an error message from a slave thread.
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*/
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#define MAX_SLAVE_ERRMSG 1024
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/**
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Mix-in to handle the message logging and reporting for relay log
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info and master log info structures.
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By inheriting from this class, the class is imbued with
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capabilities to do slave reporting.
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*/
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class Slave_reporting_capability
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{
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public:
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/** lock used to synchronize m_last_error on 'SHOW SLAVE STATUS' **/
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mutable mysql_mutex_t err_lock;
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/**
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Constructor.
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@param thread_name Printable name of the slave thread that is reporting.
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*/
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Slave_reporting_capability(char const *thread_name);
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/**
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Writes a message and, if it's an error message, to Last_Error
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(which will be displayed by SHOW SLAVE STATUS).
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@param level The severity level
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@param err_code The error code
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@param msg The message (usually related to the error
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code, but can contain more information), in
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printf() format.
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*/
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void report(loglevel level, int err_code, const char *msg, ...) const
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ATTRIBUTE_FORMAT(printf, 4, 5);
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/**
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Clear errors. They will not show up under <code>SHOW SLAVE
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STATUS</code>.
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*/
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void clear_error() {
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mysql_mutex_lock(&err_lock);
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m_last_error.clear();
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mysql_mutex_unlock(&err_lock);
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}
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/**
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Error information structure.
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*/
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class Error {
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friend class Slave_reporting_capability;
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public:
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Error()
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{
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clear();
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}
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void clear()
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{
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number= 0;
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message[0]= '\0';
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}
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/** Error code */
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uint32 number;
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/** Error message */
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char message[MAX_SLAVE_ERRMSG];
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};
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Error const& last_error() const { return m_last_error; }
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virtual ~Slave_reporting_capability()= 0;
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private:
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/**
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Last error produced by the I/O or SQL thread respectively.
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*/
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mutable Error m_last_error;
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char const *const m_thread_name;
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// not implemented
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Slave_reporting_capability(const Slave_reporting_capability& rhs);
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Slave_reporting_capability& operator=(const Slave_reporting_capability& rhs);
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};
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#endif // RPL_REPORTING_H
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