seaweedfs/weed/topology/cluster_commands.go

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package topology
import (
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"encoding/json"
"fmt"
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"github.com/chrislusf/raft"
"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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hashicorpRaft "github.com/hashicorp/raft"
)
type MaxVolumeIdCommand struct {
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MaxVolumeId needle.VolumeId `json:"maxVolumeId"`
}
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func NewMaxVolumeIdCommand(value needle.VolumeId) *MaxVolumeIdCommand {
return &MaxVolumeIdCommand{
MaxVolumeId: value,
}
}
func (c *MaxVolumeIdCommand) CommandName() string {
return "MaxVolumeId"
}
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// deprecatedCommandApply represents the old interface to apply a command to the server.
func (c *MaxVolumeIdCommand) Apply(server raft.Server) (interface{}, error) {
topo := server.Context().(*Topology)
before := topo.GetMaxVolumeId()
topo.UpAdjustMaxVolumeId(c.MaxVolumeId)
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glog.V(1).Infoln("max volume id", before, "==>", topo.GetMaxVolumeId())
return nil, nil
}
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func (s *MaxVolumeIdCommand) Persist(sink hashicorpRaft.SnapshotSink) error {
b, err := json.Marshal(s)
if err != nil {
return fmt.Errorf("marshal: %v", err)
}
_, err = sink.Write(b)
if err != nil {
sink.Cancel()
return fmt.Errorf("sink.Write(): %v", err)
}
return sink.Close()
}
func (s *MaxVolumeIdCommand) Release() {
}