test_status_var_service.cc

/* Copyright (c) 2017, 2025, Oracle and/or its affiliates.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.

This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.

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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301 USA */

/**
 This file contains a test (example) component, which tests the apis of
 "status_variable_registration" service provided by the
 "mysql_server" component.
*/

#include<mysql/components/component_implementation.h>
#include<mysql/components/services/component_status_var_service.h>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<vector>

#defineMAX_BUFFER_LENGTH100
int log_text_len = 0;
char log_text[MAX_BUFFER_LENGTH];
FILE *outfile;
constchar *filename = "test_component_status_var_service.log";
classTHD;

#defineWRITE_LOG(format, lit_log_text) \
 log_text_len = sprintf(log_text, format, lit_log_text); \
if (fwrite((unsignedchar *)log_text, sizeof(char), log_text_len, \
 outfile) != static_cast<size_t>(log_text_len)) \
returntrue;

REQUIRES_SERVICE_PLACEHOLDER(status_variable_registration);

staticint int_variable_value = 7;
staticbool bool_variable_value = true;
staticlong long_variable_value = 1234567;
staticdouble double_variable_value = 8.0;
staticlonglong longlong_variable_value = 123456789;
staticchar char_variable_value[] = "Testing CHAR status variable";
staticchar *char_ptr_variable_value = nullptr;

using std::swap;
staticvoidchar_ptr_foo() {
char char_buff[50];
char *char_ptr;

snprintf(char_buff, sizeof(char_buff), "Testing CHAR_PTR for status vars");
 char_ptr = strdup(char_buff);
swap(char_ptr, char_ptr_variable_value);

if (char_ptr) free(char_ptr);
}

/*
 Constructing the status variable objects for different types, used to pass
 as a parameter to register_variable()/unregister_variable() apis.
*/
static SHOW_VAR status_int_var[] = {
 {"test_component.int_var", (char *)&int_variable_value, SHOW_INT,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_bool_var[] = {
 {"test_component.bool_var", (char *)&bool_variable_value, SHOW_BOOL,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_long_var[] = {
 {"test_component.long_var", (char *)&long_variable_value, SHOW_LONG,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_longlong_var[] = {
 {"test_component.longlong_var", (char *)&longlong_variable_value,
 SHOW_LONGLONG, SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_char_var[] = {
 {"test_component.char_var", (char *)&char_variable_value, SHOW_CHAR,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_char_ptr_var[] = {
 {"test_component.char_ptr_var", (char *)&char_ptr_variable_value,
 SHOW_CHAR_PTR, SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_double_var[] = {
 {"test_component.double_var", (char *)&double_variable_value, SHOW_DOUBLE,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};

staticintshow_func_example(THD *, SHOW_VAR *var, char *buf) {
 var->type = SHOW_CHAR;
 var->value = buf;
snprintf(buf, 100, "Testing SHOW_FUNC type for component status variables");
return0;
}
static SHOW_VAR status_func_var[] = {
 {"test_component.func_var", (char *)show_func_example, SHOW_FUNC,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};

structexample_vars_t {
char var1[10];
double var2;
};
example_vars_t example_vars = {"MySQL", 8.0};
static SHOW_VAR array_value[] = {
 {"var1", (char *)&example_vars.var1, SHOW_CHAR, SHOW_SCOPE_GLOBAL},
 {"var2", (char *)&example_vars.var2, SHOW_DOUBLE, SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};
static SHOW_VAR status_array_var[] = {
 {"test_component.array", (char *)array_value, SHOW_ARRAY,
 SHOW_SCOPE_GLOBAL},
 {nullptr, nullptr, SHOW_UNDEF,
 SHOW_SCOPE_UNDEF} // null terminator required
};

/**
 Initialization entry method for test component. It executes the tests of
 the service.
*/
staticmysql_service_status_ttest_component_status_var_service_init() {
 outfile = fopen(filename, "w+");
 char_ptr_variable_value = nullptr;

WRITE_LOG("%s\n", "test_component_status_var init:");
char_ptr_foo();

if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_int_var)) {
WRITE_LOG("%s\n", "integer register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_bool_var)) {
WRITE_LOG("%s\n", "bool register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_long_var)) {
WRITE_LOG("%s\n", "long register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_longlong_var)) {
WRITE_LOG("%s\n", "longlong register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_char_var)) {
WRITE_LOG("%s\n", "char register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_char_ptr_var)) {
WRITE_LOG("%s\n", "char_ptr register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_double_var)) {
WRITE_LOG("%s\n", "double register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_func_var)) {
WRITE_LOG("%s\n", "func register_variable failed.");
 }
if (mysql_service_status_variable_registration->register_variable(
 (SHOW_VAR *)&status_array_var)) {
WRITE_LOG("%s\n", "array register_variable failed.");
 }
WRITE_LOG("%s\n", "test_component_status_var end of init:");
fclose(outfile);

returnfalse;
}

/**
 De-initialization method for Component.
*/
staticmysql_service_status_ttest_component_status_var_service_deinit() {
 outfile = fopen(filename, "a+");

WRITE_LOG("%s\n", "test_component_status_var deinit:");

if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_int_var)) {
WRITE_LOG("%s\n", "integer unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_bool_var)) {
WRITE_LOG("%s\n", "bool unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_long_var)) {
WRITE_LOG("%s\n", "long unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_longlong_var)) {
WRITE_LOG("%s\n", "longlong unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_char_var)) {
WRITE_LOG("%s\n", "char unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_char_ptr_var)) {
WRITE_LOG("%s\n", "char_ptr unregister_variable failed.");
 }
free(char_ptr_variable_value);
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_double_var)) {
WRITE_LOG("%s\n", "double unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_func_var)) {
WRITE_LOG("%s\n", "func unregister_variable failed.");
 }
if (mysql_service_status_variable_registration->unregister_variable(
 (SHOW_VAR *)&status_array_var)) {
WRITE_LOG("%s\n", "array unregister_variable failed.");
 }
WRITE_LOG("%s\n", "test_component_status_var_service end of deinit:");

fclose(outfile);
returnfalse;
}

/* An empty list as no service is provided. */
BEGIN_COMPONENT_PROVIDES(test_component_status_var_service)
END_COMPONENT_PROVIDES();

/* A list of required services. */
BEGIN_COMPONENT_REQUIRES(test_component_status_var_service)
REQUIRES_SERVICE(status_variable_registration), END_COMPONENT_REQUIRES();

/* A list of metadata to describe the Component. */
BEGIN_COMPONENT_METADATA(test_component_status_var_service)
METADATA("mysql.author", "Oracle Corporation"),
 METADATA("mysql.license", "GPL"),
 METADATA("test_component_status_var_service", "1"),
 END_COMPONENT_METADATA();

/* Declaration of the Component. */
DECLARE_COMPONENT(test_component_status_var_service,
"mysql:test_component_status_var_service")
test_component_status_var_service_init,
 test_component_status_var_service_deinit END_DECLARE_COMPONENT();

/* Defines list of Components contained in this library. Note that for now
 we assume that library will have exactly one Component. */
DECLARE_LIBRARY_COMPONENTS &COMPONENT_REF(test_component_status_var_service)
 END_DECLARE_LIBRARY_COMPONENTS