Example #1
0
func CreateOrUpdate(zconn zkhelper.Conn, zkPath, value string, flags int, aclv []topo.ACL, recursive bool) (pathCreated string, err error) {
	if recursive {
		pathCreated, err = CreateRecursive(zconn, zkPath, value, flags, aclv)
	} else {
		pathCreated, err = zconn.Create(zkPath, []byte(value), int32(flags), aclv)
	}
	if err != nil && zkhelper.ZkErrorEqual(err, topo.ErrNodeExists) {
		pathCreated = ""
		_, err = zconn.Set(zkPath, []byte(value), -1)
	}
	return
}
Example #2
0
func SetProxyStatus(zkConn zkhelper.Conn, productName string, proxyName string, status string) error {
	p, err := GetProxyInfo(zkConn, productName, proxyName)
	if err != nil {
		return errors.Trace(err)
	}

	if status != PROXY_STATE_ONLINE && status != PROXY_STATE_MARK_OFFLINE && status != PROXY_STATE_OFFLINE {
		return errors.Errorf("%v, %s", ErrUnknownProxyStatus, status)
	}

	// check slot status before setting proxy online
	if status == PROXY_STATE_ONLINE {
		slots, err := Slots(zkConn, productName)
		if err != nil {
			return errors.Trace(err)
		}
		for _, slot := range slots {
			if slot.State.Status != SLOT_STATUS_ONLINE && slot.State.Status != SLOT_STATUS_MIGRATE {
				return errors.Errorf("slot %v is not online or migrate", slot)
			}
			if slot.GroupId == INVALID_ID {
				return errors.Errorf("slot %v has invalid group id", slot)
			}
		}
	}

	p.State = status
	b, _ := json.Marshal(p)

	_, err = zkConn.Set(path.Join(GetProxyPath(productName), proxyName), b, -1)
	if err != nil {
		return errors.Trace(err)
	}

	if status == PROXY_STATE_MARK_OFFLINE {
		// wait for the proxy down
		for {
			_, _, c, err := zkConn.GetW(path.Join(GetProxyPath(productName), proxyName))
			if zkhelper.ZkErrorEqual(err, zk.ErrNoNode) {
				return nil
			} else if err != nil {
				return errors.Trace(err)
			}
			<-c
			info, err := GetProxyInfo(zkConn, productName, proxyName)
			log.Info("mark_offline, check proxy status:", proxyName, info, err)
			if zkhelper.ZkErrorEqual(err, zk.ErrNoNode) {
				log.Info("shutdown proxy successful")
				return nil
			} else if err != nil {
				return errors.Trace(err)
			}
			if info.State == PROXY_STATE_OFFLINE {
				log.Infof("proxy: %s offline success!", proxyName)
				return nil
			}
		}
	}

	return nil
}