objectstore/mix: Separate

1 files changed, 0 insertions, 257 deletions

diff --git a/objectstore/mix/mix.go b/objectstore/mix/mix.go
index 00b2a4af..e2757705 100644
--- a/objectstore/mix/mix.go
+++ b/objectstore/mix/mix.go
@@ -3,14 +3,9 @@
 package mix
 
 import (
-	"errors"
-	"fmt"
-	"io"
 	"sync"
 
-	"codeberg.org/lindenii/furgit/objectid"
 	"codeberg.org/lindenii/furgit/objectstore"
-	"codeberg.org/lindenii/furgit/objecttype"
 )
 
 // Mix queries multiple object databases with an MRU backend preference.
@@ -21,255 +16,3 @@ type Mix struct {
 	backendTail        *backendNode
 	backendNodeByStore map[objectstore.Store]*backendNode
 }
-
-// New creates a Mix from backends.
-func New(backends ...objectstore.Store) *Mix {
-	nodeByStore := make(map[objectstore.Store]*backendNode, len(backends))
-
-	var (
-		head *backendNode
-		tail *backendNode
-	)
-
-	for _, backend := range backends {
-		if backend == nil {
-			continue
-		}
-
-		node := &backendNode{
-			backend: backend,
-			prev:    tail,
-		}
-		if tail != nil {
-			tail.next = node
-		}
-
-		if head == nil {
-			head = node
-		}
-
-		tail = node
-		nodeByStore[backend] = node
-	}
-
-	return &Mix{
-		backendHead:        head,
-		backendTail:        tail,
-		backendNodeByStore: nodeByStore,
-	}
-}
-
-// ReadBytesFull reads a full serialized object from one backend that has it.
-func (mix *Mix) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		full, err := backend.ReadBytesFull(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return full, nil
-		}
-
-		if errors.Is(err, objectstore.ErrObjectNotFound) {
-			continue
-		}
-
-		return nil, fmt.Errorf("objectstore: backend %d read bytes full: %w", i, err)
-	}
-
-	return nil, objectstore.ErrObjectNotFound
-}
-
-// ReadBytesContent reads an object's type and content bytes from one backend
-// that has it.
-func (mix *Mix) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		ty, content, err := backend.ReadBytesContent(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return ty, content, nil
-		}
-
-		if errors.Is(err, objectstore.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, nil, fmt.Errorf("objectstore: backend %d read bytes content: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, nil, objectstore.ErrObjectNotFound
-}
-
-// ReadReaderFull reads a full serialized object stream from one backend that
-// has it.
-func (mix *Mix) ReadReaderFull(id objectid.ObjectID) (io.ReadCloser, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		reader, err := backend.ReadReaderFull(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return reader, nil
-		}
-
-		if errors.Is(err, objectstore.ErrObjectNotFound) {
-			continue
-		}
-
-		return nil, fmt.Errorf("objectstore: backend %d read reader full: %w", i, err)
-	}
-
-	return nil, objectstore.ErrObjectNotFound
-}
-
-// ReadReaderContent reads an object's type, declared content length, and
-// content stream from one backend that has it.
-func (mix *Mix) ReadReaderContent(id objectid.ObjectID) (objecttype.Type, int64, io.ReadCloser, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		ty, size, reader, err := backend.ReadReaderContent(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return ty, size, reader, nil
-		}
-
-		if errors.Is(err, objectstore.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, 0, nil, fmt.Errorf("objectstore: backend %d read reader content: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, 0, nil, objectstore.ErrObjectNotFound
-}
-
-// ReadSize reads object content length from one backend that has it.
-func (mix *Mix) ReadSize(id objectid.ObjectID) (int64, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		size, err := backend.ReadSize(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return size, nil
-		}
-
-		if errors.Is(err, objectstore.ErrObjectNotFound) {
-			continue
-		}
-
-		return 0, fmt.Errorf("objectstore: backend %d read size: %w", i, err)
-	}
-
-	return 0, objectstore.ErrObjectNotFound
-}
-
-// ReadHeader reads object header data from one backend that has it.
-func (mix *Mix) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
-	for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
-		ty, size, err := backend.ReadHeader(id)
-		if err == nil {
-			mix.touchBackend(backend)
-
-			return ty, size, nil
-		}
-
-		if errors.Is(err, objectstore.ErrObjectNotFound) {
-			continue
-		}
-
-		return objecttype.TypeInvalid, 0, fmt.Errorf("objectstore: backend %d read header: %w", i, err)
-	}
-
-	return objecttype.TypeInvalid, 0, objectstore.ErrObjectNotFound
-}
-
-// Close closes all backends and joins close errors.
-func (mix *Mix) Close() error {
-	mix.mu.RLock()
-
-	backends := make([]objectstore.Store, 0, len(mix.backendNodeByStore))
-	for node := mix.backendHead; node != nil; node = node.next {
-		backends = append(backends, node.backend)
-	}
-
-	mix.mu.RUnlock()
-
-	var errs []error
-
-	for _, backend := range backends {
-		err := backend.Close()
-		if err != nil {
-			errs = append(errs, err)
-		}
-	}
-
-	return errors.Join(errs...)
-}
-
-type backendNode struct {
-	backend objectstore.Store
-	prev    *backendNode
-	next    *backendNode
-}
-
-func (mix *Mix) firstBackend() objectstore.Store {
-	mix.mu.RLock()
-	defer mix.mu.RUnlock()
-
-	if mix.backendHead == nil {
-		return nil
-	}
-
-	return mix.backendHead.backend
-}
-
-func (mix *Mix) nextBackend(current objectstore.Store) objectstore.Store {
-	mix.mu.RLock()
-	defer mix.mu.RUnlock()
-
-	node := mix.backendNodeByStore[current]
-	if node == nil || node.next == nil {
-		return nil
-	}
-
-	return node.next.backend
-}
-
-func (mix *Mix) touchBackend(backend objectstore.Store) {
-	if backend == nil {
-		return
-	}
-
-	if !mix.mu.TryLock() {
-		return
-	}
-	defer mix.mu.Unlock()
-
-	node := mix.backendNodeByStore[backend]
-	if node == nil || node == mix.backendHead {
-		return
-	}
-
-	if node.prev != nil {
-		node.prev.next = node.next
-	}
-
-	if node.next != nil {
-		node.next.prev = node.prev
-	}
-
-	if mix.backendTail == node {
-		mix.backendTail = node.prev
-	}
-
-	node.prev = nil
-
-	node.next = mix.backendHead
-	if mix.backendHead != nil {
-		mix.backendHead.prev = node
-	}
-
-	mix.backendHead = node
-	if mix.backendTail == nil {
-		mix.backendTail = node
-	}
-}