mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-11-27 20:59:42 +08:00
80 lines
2.9 KiB
Go
80 lines
2.9 KiB
Go
package broker
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import (
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"context"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/mq/pub_balancer"
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"github.com/seaweedfs/seaweedfs/weed/mq/schema"
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"github.com/seaweedfs/seaweedfs/weed/mq/topic"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// ConfigureTopic Runs on any broker, but proxied to the balancer if not the balancer
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// It generates an assignments based on existing allocations,
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// and then assign the partitions to the brokers.
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func (b *MessageQueueBroker) ConfigureTopic(ctx context.Context, request *mq_pb.ConfigureTopicRequest) (resp *mq_pb.ConfigureTopicResponse, err error) {
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if !b.isLockOwner() {
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proxyErr := b.withBrokerClient(false, pb.ServerAddress(b.lockAsBalancer.LockOwner()), func(client mq_pb.SeaweedMessagingClient) error {
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resp, err = client.ConfigureTopic(ctx, request)
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return nil
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})
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if proxyErr != nil {
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return nil, proxyErr
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}
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return resp, err
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}
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// validate the schema
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if request.RecordType != nil {
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if _, err = schema.NewSchema(request.RecordType); err != nil {
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return nil, status.Errorf(codes.InvalidArgument, "invalid record type %+v: %v", request.RecordType, err)
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}
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}
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t := topic.FromPbTopic(request.Topic)
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var readErr, assignErr error
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resp, readErr = b.readTopicConfFromFiler(t)
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if readErr != nil {
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glog.V(0).Infof("read topic %s conf: %v", request.Topic, readErr)
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}
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if resp != nil {
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assignErr = b.ensureTopicActiveAssignments(t, resp)
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// no need to assign directly.
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// The added or updated assignees will read from filer directly.
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// The gone assignees will die by themselves.
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}
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if readErr == nil && assignErr == nil && len(resp.BrokerPartitionAssignments) == int(request.PartitionCount) {
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glog.V(0).Infof("existing topic partitions %d: %+v", len(resp.BrokerPartitionAssignments), resp.BrokerPartitionAssignments)
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return
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}
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if resp != nil && len(resp.BrokerPartitionAssignments) > 0 {
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if cancelErr := b.assignTopicPartitionsToBrokers(ctx, request.Topic, resp.BrokerPartitionAssignments, false); cancelErr != nil {
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glog.V(1).Infof("cancel old topic %s partitions assignments %v : %v", request.Topic, resp.BrokerPartitionAssignments, cancelErr)
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}
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}
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resp = &mq_pb.ConfigureTopicResponse{}
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if b.Balancer.Brokers.IsEmpty() {
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return nil, status.Errorf(codes.Unavailable, pub_balancer.ErrNoBroker.Error())
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}
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resp.BrokerPartitionAssignments = pub_balancer.AllocateTopicPartitions(b.Balancer.Brokers, request.PartitionCount)
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resp.RecordType = request.RecordType
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// save the topic configuration on filer
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if err := b.saveTopicConfToFiler(request.Topic, resp); err != nil {
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return nil, fmt.Errorf("configure topic: %v", err)
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}
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b.Balancer.OnPartitionChange(request.Topic, resp.BrokerPartitionAssignments)
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glog.V(0).Infof("ConfigureTopic: topic %s partition assignments: %v", request.Topic, resp.BrokerPartitionAssignments)
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return resp, err
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}
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