/
saga_instance_store.go
90 lines (72 loc) · 2.07 KB
/
saga_instance_store.go
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package edatpgx
import (
"context"
"fmt"
"github.com/rezaAmiri123/edat/core"
edatlog "github.com/rezaAmiri123/edat/log"
"github.com/rezaAmiri123/edat/saga"
)
type SagaInstanceStore struct {
tableName string
client Client
logger edatlog.Logger
}
var _ saga.InstanceStore = (*SagaInstanceStore)(nil)
func NewSagaInstanceStore(client Client, options ...SagaInstanceStoreOption) *SagaInstanceStore {
s := &SagaInstanceStore{
tableName: DefaultSagaInstanceTableName,
client: client,
logger: edatlog.DefaultLogger,
}
for _, option := range options {
option(s)
}
return s
}
func (s *SagaInstanceStore) Find(ctx context.Context, sagaName, sagaID string) (*saga.Instance, error) {
var dataName string
var data []byte
var currentStep int
var endState, compensating bool
row := s.client.QueryRow(ctx, fmt.Sprintf(findSagaInstanceSQL, s.tableName), sagaName, sagaID)
err := row.Scan(&dataName, &data, ¤tStep, &endState, &compensating)
if err != nil {
return nil, err
}
sagaData, err := core.DeserializeSagaData(dataName, data)
if err != nil {
return nil, err
}
return saga.NewSagaInstance(dataName, sagaID, sagaData, currentStep, endState, compensating), nil
}
func (s *SagaInstanceStore) Save(ctx context.Context, sagaInstance *saga.Instance) error {
data, err := core.SerializeSagaData(sagaInstance.SagaData())
if err != nil {
return err
}
_, err = s.client.Exec(ctx, fmt.Sprintf(saveSagaInstanceSQL, s.tableName),
sagaInstance.SagaName(),
sagaInstance.SagaID(),
sagaInstance.SagaData().SagaDataName(),
data,
sagaInstance.CurrentStep(),
sagaInstance.EndState(),
sagaInstance.Compensating(),
)
return err
}
func (s *SagaInstanceStore) Update(ctx context.Context, sagaInstance *saga.Instance) error {
data, err := core.SerializeSagaData(sagaInstance.SagaData())
if err != nil {
return err
}
_, err = s.client.Exec(ctx, fmt.Sprintf(updateSagaInstanceSQL, s.tableName),
data,
sagaInstance.CurrentStep(),
sagaInstance.EndState(),
sagaInstance.Compensating(),
sagaInstance.SagaName(),
sagaInstance.SagaID(),
)
return err
}