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MXS-2273 Move constants to more appropriate locations

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Constants now used in the context of MXS_MONITORED_SERVER or
Monitor are now moved from SERVER to MXS_MONITORED_SERVER or
Monitor, respectively.
This commit is contained in:
Johan Wikman 2019-01-28 14:52:08 +02:00
parent 57a94b417d
commit 159d9ccba9
3 changed files with 29 additions and 25 deletions
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16
include/maxscale/monitor.hh
View File

@ -131,6 +131,13 @@ class MXS_MONITORED_SERVER
public:
MXS_MONITORED_SERVER(SERVER* server);
/**
* Maintenance mode request constants.
*/
static const int MAINTENANCE_OFF = -100;
static const int MAINTENANCE_NO_CHANGE = 0;
static const int MAINTENANCE_ON = 100;
SERVER* server = nullptr; /**< The server being monitored */
MYSQL* con = nullptr; /**< The MySQL connection */
bool log_version_err = true;
@ -138,8 +145,8 @@ public:
uint64_t mon_prev_status = -1; /**< Status before starting the current monitor loop */
uint64_t pending_status = 0; /**< Status during current monitor loop */
int64_t disk_space_checked = 0; /**< When was the disk space checked the last time */
int maint_request = SERVER::MAINTENANCE_NO_CHANGE; /**< Is admin requesting Maintenance=ON/OFF on the
* server? */
int maint_request = MAINTENANCE_NO_CHANGE; /**< Is admin requesting Maintenance=ON/OFF on the
* server? */
};
#define MAX_MONITOR_USER_LEN 512
@ -155,6 +162,9 @@ public:
virtual ~Monitor();
virtual bool configure(const MXS_CONFIG_PARAMETER* params) = 0;
static const int MAINTENANCE_FLAG_NOCHECK = 0;
static const int MAINTENANCE_FLAG_CHECK = -1;
/**
* Starts the monitor. If the monitor requires polling of the servers, it should create
* a separate monitoring thread.
@ -230,7 +240,7 @@ public:
/** The state of the monitor. This should ONLY be written to by the admin thread. */
monitor_state_t m_state {MONITOR_STATE_STOPPED};
/** Set when admin requests a maintenance status change. */
int m_check_maintenance_flag {SERVER::MAINTENANCE_FLAG_NOCHECK};
int check_maintenance_flag = MAINTENANCE_FLAG_NOCHECK;
uint64_t m_ticks {0}; /**< Number of performed monitoring intervals */
uint8_t m_journal_hash[SHA_DIGEST_LENGTH]; /**< SHA1 hash of the latest written journal */

9
include/maxscale/server.hh
View File

@ -131,15 +131,6 @@ public:
static const int MAX_VERSION_LEN = 256;
static const int RLAG_UNDEFINED = -1; // Default replication lag value
/**
* Maintenance mode request constants.
*/
static const int MAINTENANCE_OFF = -100;
static const int MAINTENANCE_NO_CHANGE = 0;
static const int MAINTENANCE_ON = 100;
static const int MAINTENANCE_FLAG_NOCHECK = 0;
static const int MAINTENANCE_FLAG_CHECK = -1;
// A mapping from a path to a percentage, e.g.: "/disk" -> 80.
typedef std::unordered_map<std::string, int32_t> DiskSpaceLimits;

29
server/core/monitor.cc
View File

@ -1588,20 +1588,21 @@ void monitor_check_maintenance_requests(Monitor* monitor)
{
/* In theory, the admin may be modifying the server maintenance status during this function. The overall
* maintenance flag should be read-written atomically to prevent missing a value. */
int flags_changed = atomic_exchange_int(&monitor->m_check_maintenance_flag,
SERVER::MAINTENANCE_FLAG_NOCHECK);
if (flags_changed != SERVER::MAINTENANCE_FLAG_NOCHECK)
int flags_changed = atomic_exchange_int(&monitor->check_maintenance_flag,
Monitor::MAINTENANCE_FLAG_NOCHECK);
if (flags_changed != Monitor::MAINTENANCE_FLAG_NOCHECK)
{
for (auto ptr : monitor->m_servers)
{
// The only server status bit the admin may change is the [Maintenance] bit.
int admin_msg = atomic_exchange_int(&ptr->maint_request, SERVER::MAINTENANCE_NO_CHANGE);
if (admin_msg == SERVER::MAINTENANCE_ON)
int admin_msg = atomic_exchange_int(&ptr->maint_request,
MXS_MONITORED_SERVER::MAINTENANCE_NO_CHANGE);
if (admin_msg == MXS_MONITORED_SERVER::MAINTENANCE_ON)
{
// TODO: Change to writing MONITORED_SERVER->pending status instead once cleanup done.
ptr->server->set_status(SERVER_MAINT);
}
else if (admin_msg == SERVER::MAINTENANCE_OFF)
else if (admin_msg == MXS_MONITORED_SERVER::MAINTENANCE_OFF)
{
ptr->server->clear_status(SERVER_MAINT);
}
@ -2386,15 +2387,16 @@ bool Monitor::set_server_status(SERVER* srv, int bit, string* errmsg_out)
{
/* Maintenance is set/cleared using a special variable which the monitor reads when
* starting the next update cycle. */
int previous_request = atomic_exchange_int(&msrv->maint_request, SERVER::MAINTENANCE_ON);
int previous_request = atomic_exchange_int(&msrv->maint_request,
MXS_MONITORED_SERVER::MAINTENANCE_ON);
written = true;
// Warn if the previous request hasn't been read.
if (previous_request != SERVER::MAINTENANCE_NO_CHANGE)
if (previous_request != MXS_MONITORED_SERVER::MAINTENANCE_NO_CHANGE)
{
MXS_WARNING(WRN_REQUEST_OVERWRITTEN);
}
// Also set a flag so the next loop happens sooner.
atomic_store_int(&this->check_maintenance_flag, SERVER::MAINTENANCE_FLAG_CHECK);
atomic_store_int(&this->check_maintenance_flag, Monitor::MAINTENANCE_FLAG_CHECK);
}
else
{
@ -2440,13 +2442,14 @@ bool Monitor::clear_server_status(SERVER* srv, int bit, string* errmsg_out)
else if (bit & SERVER_MAINT)
{
// Warn if the previous request hasn't been read.
int previous_request = atomic_exchange_int(&msrv->maint_request, SERVER::MAINTENANCE_OFF);
int previous_request = atomic_exchange_int(&msrv->maint_request,
MXS_MONITORED_SERVER::MAINTENANCE_OFF);
written = true;
if (previous_request != SERVER::MAINTENANCE_NO_CHANGE)
if (previous_request != MXS_MONITORED_SERVER::MAINTENANCE_NO_CHANGE)
{
MXS_WARNING(WRN_REQUEST_OVERWRITTEN);
}
atomic_store_int(&this->check_maintenance_flag, SERVER::MAINTENANCE_FLAG_CHECK);
atomic_store_int(&this->check_maintenance_flag, Monitor::MAINTENANCE_FLAG_CHECK);
}
else
{
@ -2917,7 +2920,7 @@ bool MonitorWorker::call_run_one_tick(Worker::Call::action_t action)
// Enough time has passed,
if ((now - m_loop_called > m_settings.interval)
// or maintenance flag is set,
|| atomic_load_int(&m_check_maintenance_flag) == SERVER::MAINTENANCE_FLAG_CHECK
|| atomic_load_int(&this->check_maintenance_flag) == Monitor::MAINTENANCE_FLAG_CHECK
// or a monitor-specific condition is met.
|| immediate_tick_required())
{