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82 lines
1.5 KiB
82 lines
1.5 KiB
package tidb |
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import ( |
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"time" |
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"go-common/library/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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