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122 lines
2.8 KiB
122 lines
2.8 KiB
package broker
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import (
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"context"
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"time"
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"google.golang.org/grpc"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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)
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type MessageBrokerOption struct {
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Filers []string
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DefaultReplication string
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MaxMB int
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Port int
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Cipher bool
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}
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type MessageBroker struct {
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option *MessageBrokerOption
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grpcDialOption grpc.DialOption
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topicLocks *TopicLocks
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}
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func NewMessageBroker(option *MessageBrokerOption, grpcDialOption grpc.DialOption) (messageBroker *MessageBroker, err error) {
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messageBroker = &MessageBroker{
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option: option,
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grpcDialOption: grpcDialOption,
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}
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messageBroker.topicLocks = NewTopicLocks(messageBroker)
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messageBroker.checkPeers()
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// go messageBroker.loopForEver()
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return messageBroker, nil
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}
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func (broker *MessageBroker) loopForEver() {
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for {
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broker.checkPeers()
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time.Sleep(3 * time.Second)
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}
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}
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func (broker *MessageBroker) checkPeers() {
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// contact a filer about masters
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var masters []string
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found := false
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for !found {
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for _, filer := range broker.option.Filers {
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err := broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error {
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resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
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if err != nil {
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return err
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}
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masters = append(masters, resp.Masters...)
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return nil
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})
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if err == nil {
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found = true
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break
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}
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glog.V(0).Infof("failed to read masters from %+v: %v", broker.option.Filers, err)
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time.Sleep(time.Second)
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}
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}
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glog.V(0).Infof("received master list: %s", masters)
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// contact each masters for filers
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var filers []string
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found = false
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for !found {
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for _, master := range masters {
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err := broker.withMasterClient(master, func(client master_pb.SeaweedClient) error {
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resp, err := client.ListMasterClients(context.Background(), &master_pb.ListMasterClientsRequest{
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ClientType: "filer",
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})
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if err != nil {
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return err
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}
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filers = append(filers, resp.GrpcAddresses...)
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return nil
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})
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if err == nil {
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found = true
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break
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}
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glog.V(0).Infof("failed to list filers: %v", err)
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time.Sleep(time.Second)
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}
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}
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glog.V(0).Infof("received filer list: %s", filers)
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broker.option.Filers = filers
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}
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func (broker *MessageBroker) withFilerClient(filer string, fn func(filer_pb.SeaweedFilerClient) error) error {
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return pb.WithFilerClient(filer, broker.grpcDialOption, fn)
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}
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func (broker *MessageBroker) withMasterClient(master string, fn func(client master_pb.SeaweedClient) error) error {
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return pb.WithMasterClient(master, broker.grpcDialOption, func(client master_pb.SeaweedClient) error {
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return fn(client)
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})
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}
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