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commandstore.go
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commandstore.go
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// Copyright 2023 The PipeCD Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package datastore
import (
"context"
"encoding/json"
"fmt"
"time"
"github.com/pipe-cd/pipecd/pkg/model"
)
type commandCollection struct {
requestedBy Commander
}
func (c *commandCollection) Kind() string {
return "Command"
}
func (c *commandCollection) Factory() Factory {
return func() interface{} {
return &model.Command{}
}
}
func (c *commandCollection) ListInUsedShards() []Shard {
return []Shard{
AgentShard,
OpsShard,
}
}
func (c *commandCollection) GetUpdatableShard() (Shard, error) {
switch c.requestedBy {
case PipedCommander:
return AgentShard, nil
case OpsCommander:
return OpsShard, nil
default:
return "", ErrUnsupported
}
}
func (c *commandCollection) Decode(e interface{}, parts map[Shard][]byte) error {
if len(parts) != len(c.ListInUsedShards()) {
return fmt.Errorf("failed while decode Command object: shards count not matched")
}
cmd, ok := e.(*model.Command)
if !ok {
return fmt.Errorf("failed while decode Command object: type not matched")
}
var (
status model.CommandStatus
updatedAt int64
)
for _, p := range parts {
if err := json.Unmarshal(p, &cmd); err != nil {
return err
}
if updatedAt < cmd.UpdatedAt {
updatedAt = cmd.UpdatedAt
}
if status < cmd.Status {
status = cmd.Status
}
}
cmd.Status = status
cmd.UpdatedAt = updatedAt
return nil
}
func (c *commandCollection) Encode(e interface{}) (map[Shard][]byte, error) {
const errFmt = "failed while encode Command object: %s"
me, ok := e.(*model.Command)
if !ok {
return nil, fmt.Errorf(errFmt, "type not matched")
}
agentShardStruct := me
adata, err := json.Marshal(&agentShardStruct)
if err != nil {
return nil, fmt.Errorf(errFmt, "unable to marshal entity data")
}
opsShardStruct := model.Command{
// Required fields to pass validation on update.
Id: me.Id,
PipedId: me.PipedId,
CreatedAt: me.CreatedAt,
UpdatedAt: me.UpdatedAt,
// Fields which in both shards, but the higher value has
// a higher priority on merge.
Status: me.Status,
}
odata, err := json.Marshal(&opsShardStruct)
if err != nil {
return nil, fmt.Errorf(errFmt, "unable to marshal entity data")
}
return map[Shard][]byte{
AgentShard: adata,
OpsShard: odata,
}, nil
}
type CommandStore interface {
Add(ctx context.Context, cmd *model.Command) error
Get(ctx context.Context, id string) (*model.Command, error)
List(ctx context.Context, opts ListOptions) ([]*model.Command, error)
UpdateStatus(ctx context.Context, id string, status model.CommandStatus, metadata map[string]string, handledAt int64) error
}
type commandStore struct {
backend
commander Commander
nowFunc func() time.Time
}
func NewCommandStore(ds DataStore, c Commander) CommandStore {
return &commandStore{
backend: backend{
ds: ds,
col: &commandCollection{requestedBy: c},
},
commander: c,
nowFunc: time.Now,
}
}
func (s *commandStore) Add(ctx context.Context, cmd *model.Command) error {
now := s.nowFunc().Unix()
if cmd.CreatedAt == 0 {
cmd.CreatedAt = now
}
if cmd.UpdatedAt == 0 {
cmd.UpdatedAt = now
}
if err := cmd.Validate(); err != nil {
return err
}
return s.ds.Create(ctx, s.col, cmd.Id, cmd)
}
func (s *commandStore) Get(ctx context.Context, id string) (*model.Command, error) {
var entity model.Command
if err := s.ds.Get(ctx, s.col, id, &entity); err != nil {
return nil, err
}
return &entity, nil
}
func (s *commandStore) List(ctx context.Context, opts ListOptions) ([]*model.Command, error) {
it, err := s.ds.Find(ctx, s.col, opts)
if err != nil {
return nil, err
}
cmds := make([]*model.Command, 0)
for {
var cmd model.Command
err := it.Next(&cmd)
if err == ErrIteratorDone {
break
}
if err != nil {
return nil, err
}
cmds = append(cmds, &cmd)
}
return cmds, nil
}
func (s *commandStore) update(ctx context.Context, id string, updater func(piped *model.Command) error) error {
now := s.nowFunc().Unix()
return s.ds.Update(ctx, s.col, id, func(e interface{}) error {
p := e.(*model.Command)
if err := updater(p); err != nil {
return err
}
p.UpdatedAt = now
return p.Validate()
})
}
func (s *commandStore) UpdateStatus(ctx context.Context, id string, status model.CommandStatus, metadata map[string]string, handledAt int64) error {
return s.update(ctx, id, func(c *model.Command) error {
c.Status = status
c.Metadata = metadata
c.HandledAt = handledAt
return nil
})
}