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repository.go
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repository.go
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package rest
import (
"github.com/getkin/kin-openapi/openapi3"
"go.uber.org/fx"
"golang.org/x/net/context"
)
type ResourceRepositoryParams struct {
fx.In
EventStore EventStore
Projections []Projection `group:"projections"`
DefaultProjection Projection `name:"defaultProjection" optional:"true"`
Config *openapi3.T
}
type ResourceRepositoryResult struct {
fx.Out
Repository *ResourceRepository
}
// NewResourceRepository creates a new resource repository and registers all the event handlers
func NewResourceRepository(p ResourceRepositoryParams) (ResourceRepositoryResult, error) {
repo := &ResourceRepository{
eventStore: p.EventStore,
defaultProjection: p.DefaultProjection,
projections: p.Projections,
config: p.Config,
}
if p.DefaultProjection != nil {
for _, handler := range p.DefaultProjection.GetEventHandlers() {
err := p.EventStore.AddSubscriber(handler)
if err != nil {
return ResourceRepositoryResult{}, err
}
}
}
for _, projection := range p.Projections {
for _, handler := range projection.GetEventHandlers() {
err := p.EventStore.AddSubscriber(handler)
if err != nil {
return ResourceRepositoryResult{}, err
}
}
}
return ResourceRepositoryResult{
Repository: repo,
}, nil
}
type ResourceRepository struct {
eventStore EventStore
defaultProjection Projection
projections []Projection
config *openapi3.T
}
func (r *ResourceRepository) Initialize(ctxt context.Context, logger Log, payload []byte) (resource Resource, err error) {
//try to get the resource from the default projection and if it doesn't exist create it
resource, err = r.defaultProjection.GetByURI(ctxt, logger, "")
if err != nil {
logger.Debugf("error encountered getting resource from default projection '%s'", err)
return nil, err
}
if resource == nil {
resource = new(BasicResource)
}
resource, err = resource.FromBytes(r.config, payload)
return resource, err
}
func (r *ResourceRepository) Persist(ctxt context.Context, logger Log, resources []Resource) []error {
var errs []error
for _, resource := range resources {
r.eventStore.Persist(ctxt, logger, resource.GetNewChanges())
}
return errs
}
func (r *ResourceRepository) Remove(ctxt context.Context, logger Log, resources []Resource) error {
//TODO implement me
panic("implement me")
}
func (r *ResourceRepository) GetProjections() []Projection {
return r.projections
}
func (r *ResourceRepository) GetDefaultProjection() Projection {
return r.defaultProjection
}