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package messaging
import (
"context"
"fmt"
"time"
"google.golang.org/grpc"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
)
type MessageBrokerOption struct {
Filers []string
DefaultReplication string
MaxMB int
Port int
Cipher bool
}
type MessageBroker struct {
option *MessageBrokerOption
grpcDialOption grpc.DialOption
}
func NewMessageBroker(option *MessageBrokerOption, grpcDialOption grpc.DialOption) (messageBroker *MessageBroker, err error) {
messageBroker = &MessageBroker{
option: option,
grpcDialOption: grpcDialOption,
}
go messageBroker.loopForEver()
return messageBroker, nil
}
func (broker *MessageBroker) loopForEver() {
for {
broker.checkPeers()
time.Sleep(3 * time.Second)
}
}
func (broker *MessageBroker) checkPeers() {
// contact a filer about masters
var masters []string
for _, filer := range broker.option.Filers {
err := broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error {
resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
if err != nil {
return err
}
masters = append(masters, resp.Masters...)
return nil
})
if err != nil {
fmt.Printf("failed to read masters from %+v: %v\n", broker.option.Filers, err)
return
}
}
// contact each masters for filers
var filers []string
for _, master := range masters {
err := broker.withMasterClient(master, func(client master_pb.SeaweedClient) error {
resp, err := client.ListMasterClients(context.Background(), &master_pb.ListMasterClientsRequest{
ClientType: "filer",
})
if err != nil {
return err
}
fmt.Printf("filers: %+v\n", resp.GrpcAddresses)
filers = append(filers, resp.GrpcAddresses...)
return nil
})
if err != nil {
fmt.Printf("failed to list filers: %v\n", err)
return
}
}
// contact each filer about brokers
for _, filer := range filers {
err := broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error {
resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
if err != nil {
return err
}
masters = append(masters, resp.Masters...)
return nil
})
if err != nil {
fmt.Printf("failed to read masters from %+v: %v\n", broker.option.Filers, err)
return
}
}
}
func (broker *MessageBroker) withFilerClient(filer string, fn func(filer_pb.SeaweedFilerClient) error) error {
return pb.WithFilerClient(filer, broker.grpcDialOption, fn)
}
func (broker *MessageBroker) withMasterClient(master string, fn func(client master_pb.SeaweedClient) error) error {
return pb.WithMasterClient(master, broker.grpcDialOption, func(client master_pb.SeaweedClient) error {
return fn(client)
})
}
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