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14f1930004
* Make interfaces more specific than "MDS" - Introduce `dax.Schemar` interface - Introduce `dax.Noder` interface - The rest is generally to standardize on the new interfaces. - Remove `pilosa.SchemaInfoAPI` interface - Move `TranslateNode` and `ComputeNode` types from controller to dax package - Remove `queryer.FeatureBaseImporter` - Remove `queryer.MDS` interface - Remove `queryer.Importer` interface - Identify types using an "MDS" interface and split into Noder/Schemar as necessary - Changed `Queryer.orchestrator` to a `map[qual]*qualifiedOrchestrator` because we can't share an orchestrator across quals * Convert orchestrator to use TableKeyer
101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
package dax
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import (
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"context"
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"fmt"
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"github.com/molecula/featurebase/v3/errors"
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)
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// Node is used in API requests, like RegisterNode (before being assigned
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// roles).
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type Node struct {
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Address Address `json:"address"`
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RoleTypes []RoleType `json:"role-types"`
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}
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// AssignedNode is used in API responses.
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type AssignedNode struct {
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Address Address `json:"address"`
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Role Role `json:"role"`
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}
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// NodeService represents a service for managing Nodes.
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type NodeService interface {
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CreateNode(context.Context, Address, *Node) error
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ReadNode(context.Context, Address) (*Node, error)
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DeleteNode(context.Context, Address) error
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Nodes(context.Context) ([]*Node, error)
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}
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// ComputeNode represents a compute node and the table/shards for which it is
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// responsible.
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type ComputeNode struct {
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Address Address `json:"address"`
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Table TableKey `json:"table"`
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Shards ShardNums `json:"shards"`
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}
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// TranslateNode represents a translate node and the table/partitions for which
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// it is responsible.
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type TranslateNode struct {
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Address Address `json:"address"`
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Table TableKey `json:"table"`
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Partitions PartitionNums `json:"partitions"`
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}
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type Noder interface {
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ComputeNodes(ctx context.Context, qtid QualifiedTableID, shards ...ShardNum) ([]ComputeNode, error)
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TranslateNodes(ctx context.Context, qtid QualifiedTableID, partitions ...PartitionNum) ([]TranslateNode, error)
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// IngestPartition is effectively the "write" version of TranslateNodes. Its
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// implementations will return the same Address that TranslateNodes would,
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// but it includes the logic to create/assign the partition if it is not
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// already being handled by a computer.
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IngestPartition(ctx context.Context, qtid QualifiedTableID, partition PartitionNum) (Address, error)
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// IngestShard is effectively the "write" version of ComputeNodes. Its
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// implementations will return the same Address that ComputeNodes would, but
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// it includes the logic to create/assign the shard if it is not already
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// being handled by a computer.
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IngestShard(ctx context.Context, qtid QualifiedTableID, shard ShardNum) (Address, error)
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}
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// Ensure type implements interface.
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var _ Noder = &nopNoder{}
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// NopMDS is a no-op implementation of the MDS interface.
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type nopNoder struct{}
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func NewNopNoder() *nopNoder {
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return &nopNoder{}
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}
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func (n *nopNoder) ComputeNodes(ctx context.Context, qtid QualifiedTableID, shards ...ShardNum) ([]ComputeNode, error) {
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return nil, nil
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}
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func (n *nopNoder) IngestPartition(ctx context.Context, qtid QualifiedTableID, partition PartitionNum) (Address, error) {
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return "", nil
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}
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func (n *nopNoder) IngestShard(ctx context.Context, qtid QualifiedTableID, shard ShardNum) (Address, error) {
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return "", nil
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}
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func (n *nopNoder) TranslateNodes(ctx context.Context, qtid QualifiedTableID, partitions ...PartitionNum) ([]TranslateNode, error) {
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return nil, nil
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}
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////////////////////////////////////////////////////
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// Errors
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////////////////////////////////////////////////////
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const (
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ErrNodeDoesNotExist errors.Code = "NodeDoesNotExist"
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)
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func NewErrNodeDoesNotExist(addr Address) error {
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return errors.New(
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ErrNodeDoesNotExist,
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fmt.Sprintf("node '%s' does not exist", addr),
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)
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}
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