Merge pull request #1 from chrislusf/master

sync

1 files changed, 121 insertions, 0 deletions

diff --git a/weed/server/msg_broker_server.go b/weed/server/msg_broker_server.go
new file mode 100644
index 000000000..a9d908581
--- /dev/null
+++ b/weed/server/msg_broker_server.go
@@ -0,0 +1,121 @@
+package weed_server
+
+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"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+type MessageBrokerOption struct {
+	Filers             []string
+	DefaultReplication string
+	MaxMB              int
+	Port               int
+}
+
+type MessageBroker struct {
+	option         *MessageBrokerOption
+	grpcDialOption grpc.DialOption
+}
+
+func NewMessageBroker(option *MessageBrokerOption) (messageBroker *MessageBroker, err error) {
+
+	messageBroker = &MessageBroker{
+		option:         option,
+		grpcDialOption: security.LoadClientTLS(util.GetViper(), "grpc.msg_broker"),
+	}
+
+	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)
+	})
+
+}