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package broker
import (
"github.com/chrislusf/seaweedfs/weed/cluster"
"github.com/chrislusf/seaweedfs/weed/pb/mq_pb"
"github.com/chrislusf/seaweedfs/weed/wdclient"
"google.golang.org/grpc"
"time"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
)
type MessageQueueBrokerOption struct {
Masters map[string]pb.ServerAddress
FilerGroup string
DataCenter string
Rack string
DefaultReplication string
MaxMB int
Ip string
Port int
Cipher bool
}
type MessageQueueBroker struct {
mq_pb.UnimplementedSeaweedMessagingServer
option *MessageQueueBrokerOption
grpcDialOption grpc.DialOption
MasterClient *wdclient.MasterClient
filers map[pb.ServerAddress]struct{}
currentFiler pb.ServerAddress
}
func NewMessageBroker(option *MessageQueueBrokerOption, grpcDialOption grpc.DialOption) (mqBroker *MessageQueueBroker, err error) {
mqBroker = &MessageQueueBroker{
option: option,
grpcDialOption: grpcDialOption,
MasterClient: wdclient.NewMasterClient(grpcDialOption, option.FilerGroup, cluster.BrokerType, pb.NewServerAddress(option.Ip, option.Port, 0), option.DataCenter, option.Rack, option.Masters),
filers: make(map[pb.ServerAddress]struct{}),
}
mqBroker.MasterClient.OnPeerUpdate = mqBroker.OnBrokerUpdate
go mqBroker.MasterClient.KeepConnectedToMaster()
existingNodes := cluster.ListExistingPeerUpdates(mqBroker.MasterClient.GetMaster(), grpcDialOption, option.FilerGroup, cluster.FilerType)
for _, newNode := range existingNodes {
mqBroker.OnBrokerUpdate(newNode, time.Now())
}
return mqBroker, nil
}
func (broker *MessageQueueBroker) OnBrokerUpdate(update *master_pb.ClusterNodeUpdate, startFrom time.Time) {
if update.NodeType != cluster.FilerType {
return
}
address := pb.ServerAddress(update.Address)
if update.IsAdd {
broker.filers[address] = struct{}{}
if broker.currentFiler == "" {
broker.currentFiler = address
}
} else {
delete(broker.filers, address)
if broker.currentFiler == address {
for filer, _ := range broker.filers {
broker.currentFiler = filer
break
}
}
}
}
func (broker *MessageQueueBroker) GetFiler() pb.ServerAddress {
return broker.currentFiler
}
func (broker *MessageQueueBroker) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error {
return pb.WithFilerClient(streamingMode, broker.GetFiler(), broker.grpcDialOption, fn)
}
func (broker *MessageQueueBroker) AdjustedUrl(location *filer_pb.Location) string {
return location.Url
}
func (broker *MessageQueueBroker) withMasterClient(streamingMode bool, master pb.ServerAddress, fn func(client master_pb.SeaweedClient) error) error {
return pb.WithMasterClient(streamingMode, master, broker.grpcDialOption, func(client master_pb.SeaweedClient) error {
return fn(client)
})
}
func (broker *MessageQueueBroker) withBrokerClient(streamingMode bool, server pb.ServerAddress, fn func(client mq_pb.SeaweedMessagingClient) error) error {
return pb.WithBrokerClient(streamingMode, server, broker.grpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
return fn(client)
})
}
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