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serving_graph.go
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serving_graph.go
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package memorytopo
import (
"fmt"
"path"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
"github.com/youtube/vitess/go/vt/topo"
topodatapb "github.com/youtube/vitess/go/vt/proto/topodata"
vschemapb "github.com/youtube/vitess/go/vt/proto/vschema"
)
// GetSrvKeyspaceNames implements topo.Impl.GetSrvKeyspaceNames
func (mt *MemoryTopo) GetSrvKeyspaceNames(ctx context.Context, cell string) ([]string, error) {
children, err := mt.ListDir(ctx, cell, keyspacesPath)
switch err {
case nil:
return children, nil
case topo.ErrNoNode:
return nil, nil
default:
return nil, err
}
}
// UpdateSrvKeyspace implements topo.Impl.UpdateSrvKeyspace
func (mt *MemoryTopo) UpdateSrvKeyspace(ctx context.Context, cell, keyspace string, srvKeyspace *topodatapb.SrvKeyspace) error {
nodePath := path.Join(keyspacesPath, keyspace, topo.SrvKeyspaceFile)
data, err := proto.Marshal(srvKeyspace)
if err != nil {
return err
}
_, err = mt.Update(ctx, cell, nodePath, data, nil)
return err
}
// DeleteSrvKeyspace implements topo.Impl.DeleteSrvKeyspace
func (mt *MemoryTopo) DeleteSrvKeyspace(ctx context.Context, cell, keyspace string) error {
nodePath := path.Join(keyspacesPath, keyspace, topo.SrvKeyspaceFile)
return mt.Delete(ctx, cell, nodePath, nil)
}
// GetSrvKeyspace implements topo.Impl.GetSrvKeyspace
func (mt *MemoryTopo) GetSrvKeyspace(ctx context.Context, cell, keyspace string) (*topodatapb.SrvKeyspace, error) {
nodePath := path.Join(keyspacesPath, keyspace, topo.SrvKeyspaceFile)
data, _, err := mt.Get(ctx, cell, nodePath)
if err != nil {
return nil, err
}
srvKeyspace := &topodatapb.SrvKeyspace{}
if err := proto.Unmarshal(data, srvKeyspace); err != nil {
return nil, fmt.Errorf("SrvKeyspace unmarshal failed: %v %v", data, err)
}
return srvKeyspace, nil
}
// UpdateSrvVSchema implements topo.Impl.UpdateSrvVSchema
func (mt *MemoryTopo) UpdateSrvVSchema(ctx context.Context, cell string, srvVSchema *vschemapb.SrvVSchema) error {
nodePath := topo.SrvVSchemaFile
data, err := proto.Marshal(srvVSchema)
if err != nil {
return err
}
_, err = mt.Update(ctx, cell, nodePath, data, nil)
return err
}
// GetSrvVSchema implements topo.Impl.GetSrvVSchema
func (mt *MemoryTopo) GetSrvVSchema(ctx context.Context, cell string) (*vschemapb.SrvVSchema, error) {
nodePath := topo.SrvVSchemaFile
data, _, err := mt.Get(ctx, cell, nodePath)
if err != nil {
return nil, err
}
srvVSchema := &vschemapb.SrvVSchema{}
if err := proto.Unmarshal(data, srvVSchema); err != nil {
return nil, fmt.Errorf("SrvVSchema unmarshal failed: %v %v", data, err)
}
return srvVSchema, nil
}