116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2020-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include "utilities.hh"
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#include <inttypes.h>
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#include <limits>
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#include <stdio.h>
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#include <string>
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#include <sstream>
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#include <maxscale/dcb.h>
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#include <maxscale/debug.h>
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#include <maxscale/mysql_utils.h>
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/** Server id default value */
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const int64_t SERVER_ID_UNKNOWN = -1;
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int64_t scan_server_id(const char* id_string)
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{
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int64_t server_id = SERVER_ID_UNKNOWN;
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ss_debug(int rv = ) sscanf(id_string, "%" PRId64, &server_id);
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ss_dassert(rv == 1);
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// Server id can be 0, which was even the default value until 10.2.1.
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// KB is a bit hazy on this, but apparently when replicating, the server id should not be 0. Not sure,
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// so MaxScale allows this.
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#if defined(SS_DEBUG)
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const int64_t SERVER_ID_MIN = std::numeric_limits<uint32_t>::min();
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const int64_t SERVER_ID_MAX = std::numeric_limits<uint32_t>::max();
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#endif
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ss_dassert(server_id >= SERVER_ID_MIN && server_id <= SERVER_ID_MAX);
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return server_id;
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}
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bool query_one_row(MXS_MONITORED_SERVER *database, const char* query, unsigned int expected_cols,
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StringVector* output)
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{
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bool rval = false;
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MYSQL_RES *result;
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if (mxs_mysql_query(database->con, query) == 0 && (result = mysql_store_result(database->con)) != NULL)
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{
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unsigned int columns = mysql_field_count(database->con);
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if (columns != expected_cols)
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{
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mysql_free_result(result);
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MXS_ERROR("Unexpected result for '%s'. Expected %d columns, got %d. Server version: %s",
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query, expected_cols, columns, database->server->version_string);
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}
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else
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{
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MYSQL_ROW row = mysql_fetch_row(result);
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if (row)
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{
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for (unsigned int i = 0; i < columns; i++)
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{
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output->push_back((row[i] != NULL) ? row[i] : "");
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}
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rval = true;
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}
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else
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{
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MXS_ERROR("Query '%s' returned no rows.", query);
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}
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mysql_free_result(result);
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}
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}
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else
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{
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mon_report_query_error(database);
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}
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return rval;
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}
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string get_connection_errors(const ServerVector& servers)
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{
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// Get errors from all connections, form a string.
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std::stringstream ss;
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for (ServerVector::const_iterator iter = servers.begin(); iter != servers.end(); iter++)
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{
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const char* error = mysql_error((*iter)->con);
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ss_dassert(*error); // Every connection should have an error.
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ss << (*iter)->server->unique_name << ": '" << error << "'";
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if (iter + 1 != servers.end())
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{
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ss << ", ";
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}
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}
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return ss.str();
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}
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string monitored_servers_to_string(const ServerVector& array)
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{
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string rval;
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size_t array_size = array.size();
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if (array_size > 0)
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{
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const char* separator = "";
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for (size_t i = 0; i < array_size; i++)
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{
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rval += separator;
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rval += array[i]->server->unique_name;
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separator = ",";
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}
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}
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return rval;
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}
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