// NewRowcacheInvalidator creates a new RowcacheInvalidator.
// Just like QueryEngine, this is a singleton class.
// You must call this only once.
func NewRowcacheInvalidator(qe *QueryEngine) *RowcacheInvalidator {
rci := &RowcacheInvalidator{qe: qe}
stats.Publish("RowcacheInvalidatorState", stats.StringFunc(rci.svm.StateName))
stats.Publish("RowcacheInvalidatorPosition", stats.StringFunc(rci.PositionString))
stats.Publish("RowcacheInvalidatorLagSeconds", stats.IntFunc(rci.lagSeconds.Get))
return rci
}
func NewSchemaInfo(queryCacheSize int, reloadTime time.Duration, idleTimeout time.Duration) *SchemaInfo {
si := &SchemaInfo{
queries: cache.NewLRUCache(int64(queryCacheSize)),
connPool: dbconnpool.NewConnectionPool("", 2, idleTimeout),
ticks: timer.NewTimer(reloadTime),
}
stats.Publish("QueryCacheLength", stats.IntFunc(si.queries.Length))
stats.Publish("QueryCacheSize", stats.IntFunc(si.queries.Size))
stats.Publish("QueryCacheCapacity", stats.IntFunc(si.queries.Capacity))
stats.Publish("QueryCacheOldest", stats.StringFunc(func() string {
return fmt.Sprintf("%v", si.queries.Oldest())
}))
stats.Publish("SchemaReloadTime", stats.DurationFunc(si.ticks.Interval))
_ = stats.NewMultiCountersFunc("TableStats", []string{"Table", "Stats"}, si.getTableStats)
_ = stats.NewMultiCountersFunc("TableInvalidations", []string{"Table"}, si.getTableInvalidations)
_ = stats.NewMultiCountersFunc("QueryCounts", []string{"Table", "Plan"}, si.getQueryCount)
_ = stats.NewMultiCountersFunc("QueryTimesNs", []string{"Table", "Plan"}, si.getQueryTime)
_ = stats.NewMultiCountersFunc("QueryRowCounts", []string{"Table", "Plan"}, si.getQueryRowCount)
_ = stats.NewMultiCountersFunc("QueryErrorCounts", []string{"Table", "Plan"}, si.getQueryErrorCount)
http.Handle("/debug/query_plans", si)
http.Handle("/debug/query_stats", si)
http.Handle("/debug/table_stats", si)
http.Handle("/debug/schema", si)
return si
}
// NewSqlQuery creates an instance of SqlQuery. Only one instance
// of SqlQuery can be created per process.
func NewSqlQuery(config Config) *SqlQuery {
sq := &SqlQuery{}
sq.qe = NewQueryEngine(config)
stats.Publish("TabletState", stats.IntFunc(sq.state.Get))
stats.Publish("TabletStateName", stats.StringFunc(sq.GetState))
return sq
}
func (s *MemcacheStats) publishMainStats() {
s.mu.Lock()
defer s.mu.Unlock()
s.main = make(map[string]string)
for key, isstr := range mainStringMetrics {
key := key
if isstr {
s.main[key] = ""
stats.Publish(s.cachePool.name+"Memcache"+formatKey(key), stats.StringFunc(func() string {
s.mu.Lock()
defer s.mu.Unlock()
return s.main[key]
}))
} else {
s.main[key] = "0"
stats.Publish(s.cachePool.name+"Memcache"+formatKey(key), stats.IntFunc(func() int64 {
s.mu.Lock()
defer s.mu.Unlock()
ival, err := strconv.ParseInt(s.main[key], 10, 64)
if err != nil {
log.Errorf("value '%v' for key %v is not an int", s.main[key], key)
internalErrors.Add("MemcacheStats", 1)
return -1
}
return ival
}))
}
}
}
func newZkCell(name, zkaddr string, zkrstats *zkrStats) *zkCell {
result := &zkCell{cellName: name, zkAddr: zkaddr, zcache: newZkCache(), zkrStats: zkrstats}
result.ready = sync.NewCond(&result.mutex)
stats.Publish("Zcell"+name, stats.StringFunc(func() string {
result.mutex.Lock()
defer result.mutex.Unlock()
return stateNames[result.state]
}))
go result.backgroundRefresher()
return result
}
// RegisterUpdateStreamService needs to be called to start listening
// to clients
func RegisterUpdateStreamService(mycnf *mysqlctl.Mycnf) {
// check we haven't been called already
if UpdateStreamRpcService != nil {
panic("Update Stream service already initialized")
}
// create the singleton
UpdateStreamRpcService = &UpdateStream{mycnf: mycnf}
stats.Publish("UpdateStreamState", stats.StringFunc(func() string {
return usStateNames[UpdateStreamRpcService.state.Get()]
}))
// and register all the instances
for _, f := range RegisterUpdateStreamServices {
f(UpdateStreamRpcService)
}
}