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package broker
import (
"context"
"github.com/seaweedfs/seaweedfs/weed/filer_client"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/mq/pub_balancer"
"github.com/seaweedfs/seaweedfs/weed/mq/sub_coordinator"
"github.com/seaweedfs/seaweedfs/weed/mq/topic"
"sync"
"time"
"github.com/seaweedfs/seaweedfs/weed/cluster"
"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
"github.com/seaweedfs/seaweedfs/weed/wdclient"
"google.golang.org/grpc"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/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
VolumeServerAccess string // how to access volume servers
}
func (option *MessageQueueBrokerOption) BrokerAddress() pb.ServerAddress {
return pb.NewServerAddress(option.Ip, option.Port, 0)
}
type MessageQueueBroker struct {
mq_pb.UnimplementedSeaweedMessagingServer
option *MessageQueueBrokerOption
grpcDialOption grpc.DialOption
MasterClient *wdclient.MasterClient
filers map[pb.ServerAddress]struct{}
currentFiler pb.ServerAddress
localTopicManager *topic.LocalTopicManager
PubBalancer *pub_balancer.PubBalancer
lockAsBalancer *cluster.LiveLock
SubCoordinator *sub_coordinator.SubCoordinator
accessLock sync.Mutex
fca *filer_client.FilerClientAccessor
}
func NewMessageBroker(option *MessageQueueBrokerOption, grpcDialOption grpc.DialOption) (mqBroker *MessageQueueBroker, err error) {
pubBalancer := pub_balancer.NewPubBalancer()
subCoordinator := sub_coordinator.NewSubCoordinator()
mqBroker = &MessageQueueBroker{
option: option,
grpcDialOption: grpcDialOption,
MasterClient: wdclient.NewMasterClient(grpcDialOption, option.FilerGroup, cluster.BrokerType, option.BrokerAddress(), option.DataCenter, option.Rack, *pb.NewServiceDiscoveryFromMap(option.Masters)),
filers: make(map[pb.ServerAddress]struct{}),
localTopicManager: topic.NewLocalTopicManager(),
PubBalancer: pubBalancer,
SubCoordinator: subCoordinator,
}
fca := &filer_client.FilerClientAccessor{
GetFiler: mqBroker.GetFiler,
GetGrpcDialOption: mqBroker.GetGrpcDialOption,
}
mqBroker.fca = fca
subCoordinator.FilerClientAccessor = fca
mqBroker.MasterClient.SetOnPeerUpdateFn(mqBroker.OnBrokerUpdate)
pubBalancer.OnPartitionChange = mqBroker.SubCoordinator.OnPartitionChange
go mqBroker.MasterClient.KeepConnectedToMaster(context.Background())
existingNodes := cluster.ListExistingPeerUpdates(mqBroker.MasterClient.GetMaster(context.Background()), grpcDialOption, option.FilerGroup, cluster.FilerType)
for _, newNode := range existingNodes {
mqBroker.OnBrokerUpdate(newNode, time.Now())
}
// keep connecting to balancer
go func() {
for mqBroker.currentFiler == "" {
time.Sleep(time.Millisecond * 237)
}
self := option.BrokerAddress()
glog.V(0).Infof("broker %s found filer %s", self, mqBroker.currentFiler)
newBrokerBalancerCh := make(chan string, 1)
lockClient := cluster.NewLockClient(grpcDialOption, mqBroker.currentFiler)
mqBroker.lockAsBalancer = lockClient.StartLongLivedLock(pub_balancer.LockBrokerBalancer, string(self), func(newLockOwner string) {
glog.V(0).Infof("broker %s found balanacer %s", self, newLockOwner)
newBrokerBalancerCh <- newLockOwner
})
mqBroker.KeepConnectedToBrokerBalancer(newBrokerBalancerCh)
}()
return mqBroker, nil
}
func (b *MessageQueueBroker) OnBrokerUpdate(update *master_pb.ClusterNodeUpdate, startFrom time.Time) {
if update.NodeType != cluster.FilerType {
return
}
address := pb.ServerAddress(update.Address)
if update.IsAdd {
b.filers[address] = struct{}{}
if b.currentFiler == "" {
b.currentFiler = address
}
} else {
delete(b.filers, address)
if b.currentFiler == address {
for filer := range b.filers {
b.currentFiler = filer
break
}
}
}
}
func (b *MessageQueueBroker) GetGrpcDialOption() grpc.DialOption {
return b.grpcDialOption
}
func (b *MessageQueueBroker) GetFiler() pb.ServerAddress {
return b.currentFiler
}
func (b *MessageQueueBroker) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error {
return pb.WithFilerClient(streamingMode, 0, b.GetFiler(), b.grpcDialOption, fn)
}
func (b *MessageQueueBroker) AdjustedUrl(location *filer_pb.Location) string {
return location.Url
}
func (b *MessageQueueBroker) GetDataCenter() string {
return ""
}
func (b *MessageQueueBroker) withMasterClient(streamingMode bool, master pb.ServerAddress, fn func(client master_pb.SeaweedClient) error) error {
return pb.WithMasterClient(streamingMode, master, b.grpcDialOption, false, func(client master_pb.SeaweedClient) error {
return fn(client)
})
}
func (b *MessageQueueBroker) withBrokerClient(streamingMode bool, server pb.ServerAddress, fn func(client mq_pb.SeaweedMessagingClient) error) error {
return pb.WithBrokerGrpcClient(streamingMode, server.String(), b.grpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
return fn(client)
})
}
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