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