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112 lines
2.4 KiB
112 lines
2.4 KiB
package broker
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import (
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"crypto/md5"
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"fmt"
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"io"
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"github.com/golang/protobuf/proto"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
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)
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func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_PublishServer) error {
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// process initial request
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in, err := stream.Recv()
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if err == io.EOF {
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return nil
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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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// TODO look it up
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topicConfig := &messaging_pb.TopicConfiguration{
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// IsTransient: true,
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}
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// send init response
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initResponse := &messaging_pb.PublishResponse{
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Config: nil,
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Redirect: nil,
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}
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err = stream.Send(initResponse)
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if err != nil {
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return err
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}
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if initResponse.Redirect != nil {
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return nil
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}
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// get lock
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tp := TopicPartition{
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Namespace: in.Init.Namespace,
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Topic: in.Init.Topic,
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Partition: in.Init.Partition,
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}
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tpDir := fmt.Sprintf("%s/%s/%s", filer.TopicsDir, tp.Namespace, tp.Topic)
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md5File := fmt.Sprintf("p%02d.md5", tp.Partition)
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// println("chan data stored under", tpDir, "as", md5File)
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if exists, err := filer_pb.Exists(broker, tpDir, md5File, false); err == nil && exists {
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return fmt.Errorf("channel is already closed")
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}
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tl := broker.topicManager.RequestLock(tp, topicConfig, true)
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defer broker.topicManager.ReleaseLock(tp, true)
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md5hash := md5.New()
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// process each message
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for {
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// println("recv")
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in, err := stream.Recv()
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// glog.V(0).Infof("recieved %v err: %v", in, err)
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if err == io.EOF {
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return nil
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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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if in.Data == nil {
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continue
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}
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// fmt.Printf("received: %d : %s\n", len(in.Data.Value), string(in.Data.Value))
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data, err := proto.Marshal(in.Data)
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if err != nil {
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glog.Errorf("marshall error: %v\n", err)
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continue
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}
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tl.logBuffer.AddToBuffer(in.Data.Key, data, in.Data.EventTimeNs)
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if in.Data.IsClose {
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// println("server received closing")
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break
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}
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md5hash.Write(in.Data.Value)
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}
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if err := broker.appendToFile(tpDir+"/"+md5File, topicConfig, md5hash.Sum(nil)); err != nil {
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glog.V(0).Infof("err writing %s: %v", md5File, err)
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}
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// fmt.Printf("received md5 %X\n", md5hash.Sum(nil))
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// send the close ack
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// println("server send ack closing")
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if err := stream.Send(&messaging_pb.PublishResponse{IsClosed: true}); err != nil {
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glog.V(0).Infof("err sending close response: %v", err)
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}
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return nil
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}
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