/
node_proc.go
82 lines (78 loc) · 1.55 KB
/
node_proc.go
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package tidb
import (
"time"
"github.com/iwannay/kratos/pkg/log"
)
func (db *DB) nodeproc(e <-chan struct{}) {
if db.dis == nil {
return
}
for {
<-e
nodes := db.nodeList()
if len(nodes) == 0 {
continue
}
cm := make(map[string]*conn)
var conns []*conn
for _, conn := range db.conns {
cm[conn.addr] = conn
}
for _, node := range nodes {
if cm[node] != nil {
conns = append(conns, cm[node])
continue
}
c, err := db.connectDSN(genDSN(db.conf.DSN, node))
if err == nil {
conns = append(conns, c)
} else {
log.Error("tidb: connect addr: %s err: %+v", node, err)
}
}
if len(conns) == 0 {
log.Error("tidb: no nodes ignore event")
continue
}
oldConns := db.conns
db.mutex.Lock()
db.conns = conns
db.mutex.Unlock()
log.Info("tidb: new nodes: %v", nodes)
var removedConn []*conn
for _, conn := range oldConns {
var exist bool
for _, c := range conns {
if c.addr == conn.addr {
exist = true
break
}
}
if !exist {
removedConn = append(removedConn, conn)
}
}
go db.closeConns(removedConn)
}
}
func (db *DB) closeConns(conns []*conn) {
if len(conns) == 0 {
return
}
du := db.conf.QueryTimeout
if db.conf.ExecTimeout > du {
du = db.conf.ExecTimeout
}
if db.conf.TranTimeout > du {
du = db.conf.TranTimeout
}
time.Sleep(time.Duration(du))
for _, conn := range conns {
err := conn.Close()
if err != nil {
log.Error("tidb: close removed conn: %s err: %v", conn.addr, err)
} else {
log.Info("tidb: close removed conn: %s", conn.addr)
}
}
}