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package broker
import (
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/mq/balancer"
"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// BrokerConnectToBalancer receives connections from brokers and collects stats
func (broker *MessageQueueBroker) ConnectToBalancer(stream mq_pb.SeaweedMessaging_ConnectToBalancerServer) error {
if !broker.lockAsBalancer.IsLocked() {
return status.Errorf(codes.Unavailable, "not current broker balancer")
}
req, err := stream.Recv()
if err != nil {
return err
}
// process init message
initMessage := req.GetInit()
brokerStats := balancer.NewBrokerStats()
if initMessage != nil {
broker.Balancer.Brokers.Set(initMessage.Broker, brokerStats)
} else {
return status.Errorf(codes.InvalidArgument, "balancer init message is empty")
}
defer func() {
broker.Balancer.Brokers.Remove(initMessage.Broker)
}()
// process stats message
for {
req, err := stream.Recv()
if err != nil {
return err
}
if !broker.lockAsBalancer.IsLocked() {
return status.Errorf(codes.Unavailable, "not current broker balancer")
}
if receivedStats := req.GetStats(); receivedStats != nil {
brokerStats.UpdateStats(receivedStats)
glog.V(3).Infof("broker %s stats: %+v", initMessage.Broker, brokerStats)
}
}
return nil
}
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