edge/pkg/storage/rpc/client/blob_store.go

package client

import (
	"context"
	"net/url"

	"github.com/keegancsmith/rpc"
	"gitlab.com/wpetit/goweb/logger"

	"forge.cadoles.com/arcad/edge/pkg/storage"
	"forge.cadoles.com/arcad/edge/pkg/storage/rpc/server/blob"
	"github.com/pkg/errors"
)

type BlobStore struct {
	serverURL *url.URL
}

// DeleteBucket implements storage.BlobStore.
func (s *BlobStore) DeleteBucket(ctx context.Context, name string) error {
	args := &blob.DeleteBucketArgs{
		BucketName: name,
	}

	if err := s.call(ctx, "Service.DeleteBucket", args, nil); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

// ListBuckets implements storage.BlobStore.
func (s *BlobStore) ListBuckets(ctx context.Context) ([]string, error) {
	args := &blob.ListBucketsArgs{}

	reply := blob.ListBucketsReply{}

	if err := s.call(ctx, "Service.ListBuckets", args, &reply); err != nil {
		return nil, errors.WithStack(err)
	}

	return reply.Buckets, nil
}

// OpenBucket implements storage.BlobStore.
func (s *BlobStore) OpenBucket(ctx context.Context, name string) (storage.BlobBucket, error) {
	args := &blob.OpenBucketArgs{
		BucketName: name,
	}
	reply := &blob.OpenBucketReply{}

	if err := s.call(ctx, "Service.OpenBucket", args, reply); err != nil {
		return nil, errors.WithStack(err)
	}

	return &BlobBucket{
		name: name,
		id:   reply.BucketID,
		call: s.call,
	}, nil
}

func (s *BlobStore) call(ctx context.Context, serviceMethod string, args any, reply any) error {
	err := s.withClient(ctx, func(ctx context.Context, client *rpc.Client) error {
		if err := client.Call(ctx, serviceMethod, args, reply); err != nil {
			return errors.WithStack(err)
		}

		return nil
	})
	if err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func (s *BlobStore) withClient(ctx context.Context, fn func(ctx context.Context, client *rpc.Client) error) error {
	client, err := rpc.DialHTTPPath("tcp", s.serverURL.Host, s.serverURL.Path+"?"+s.serverURL.RawQuery)
	if err != nil {
		return errors.WithStack(err)
	}

	defer func() {
		if err := client.Close(); err != nil {
			logger.Error(ctx, "could not close rpc client", logger.E(errors.WithStack(err)))
		}
	}()

	if err := fn(ctx, client); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func NewBlobStore(serverURL *url.URL) *BlobStore {
	return &BlobStore{serverURL}
}

var _ storage.BlobStore = &BlobStore{}