// differs from the live one and so loses the prompt cache.
//
// The summarizer builds the nodes in the queue in the background. The start
-// reads the log and the tree once to fill the queue again. After that, only a
-// new message or a new node adds work.
+// reads the indexes once to fill the queue again. After that, only a new
+// message or a new node adds work. Memory keeps the nodes of the views and the
+// tasks of the running builds. It reads all other messages and nodes from their
+// day files through the indexes.
type Memory struct {
mutex sync.Mutex
root string
// builds each node that needs no model call and that a crash left out.
func (m *Memory) restoreQueue() error {
for id := range m.chat.end {
- if m.tree.Built(0, id) {
+ built, err := m.tree.Built(0, id)
+ if err != nil {
+ return err
+ }
+
+ if built {
continue
}
- leaf, free := freeLeaf(m.log.Message(id))
+ message, err := m.log.Message(id)
+ if err != nil {
+ return err
+ }
+
+ leaf, free := freeLeaf(message)
if !free {
m.queue.AddLeaf(id)
continue
}
- err := m.build(leaf)
+ err = m.build(leaf)
if err != nil {
return err
}
}
- for _, node := range m.tree.Nodes() {
- if node.Index%2 != 0 {
+ keys, err := m.tree.Keys()
+ if err != nil {
+ return err
+ }
+
+ for _, key := range keys {
+ if key.index%2 != 0 {
continue
}
- err := m.settle(node)
+ err = m.settle(key)
if err != nil {
return err
}
}
for m.chat.end < m.log.Len() {
- err := m.addMessage(m.log.Message(m.chat.end))
+ message, err := m.log.Message(m.chat.end)
+ if err != nil {
+ return err
+ }
+
+ err = m.addMessage(message)
if err != nil {
return err
}
m.queue.AddLeaf(message.ID)
}
- merged := m.chat.Append(m.tree)
- m.cview.Append(m.tree)
- if merged {
- m.cview.Coarsen(m.chat, m.tree)
+ merged, err := m.chat.Append(m.tree)
+ if err != nil {
+ return fmt.Errorf("append to chat view: %w", err)
+ }
+
+ _, err = m.cview.Append(m.tree)
+ if err == nil && merged {
+ err = m.cview.Coarsen(m.chat, m.tree)
+ }
+
+ if err != nil {
+ return fmt.Errorf("append to compaction view: %w", err)
}
return nil
}
-// build adds node to the tree and settles its parent.
+// build adds node to the tree, keeps it in the views when it is a pending line,
+// and settles its parent.
func (m *Memory) build(node Node) error {
err := m.tree.Add(node)
if err != nil {
return err
}
- return m.settle(node)
+ m.chat.Refresh(node)
+ m.cview.Refresh(node)
+
+ return m.settle(nodeKey{node.Level, node.Index})
}
-// settle looks at the parent of node when both children are built. It builds
-// each parent that needs no model call, up the tree, and adds the first other
-// parent to the queue.
-func (m *Memory) settle(node Node) error {
+// settle looks at the parent of the built node key when both children are
+// built. It builds each parent that needs no model call, up the tree, and adds
+// the first other parent to the queue.
+func (m *Memory) settle(key nodeKey) error {
for {
- sibling, built := m.tree.Node(node.Level, node.Index^1)
- if !built || m.tree.Built(node.Level+1, node.Index/2) {
- return nil
+ parent := nodeKey{key.level + 1, key.index / 2}
+ ready, err := m.ready(parent)
+ if err != nil || !ready {
+ return err
}
- left, right := node, sibling
- if node.Index%2 != 0 {
- left, right = sibling, node
+ left, right, err := m.children(parent)
+ if err != nil {
+ return err
}
- parent, free := freeMerge(left, right)
+ node, free := freeMerge(left, right)
if !free {
- m.queue.AddMerge(nodeKey{node.Level + 1, node.Index / 2})
+ m.queue.AddMerge(parent)
return nil
}
- err := m.tree.Add(parent)
+ err = m.tree.Add(node)
if err != nil {
return err
}
- node = parent
+ key = parent
+ }
+}
+
+// ready tells if both children of the node key are built and the node is not.
+func (m *Memory) ready(key nodeKey) (bool, error) {
+ for _, index := range []int{2 * key.index, 2*key.index + 1} {
+ built, err := m.tree.Built(key.level-1, index)
+ if err != nil || !built {
+ return false, err
+ }
+ }
+
+ built, err := m.tree.Built(key.level, key.index)
+
+ return !built, err
+}
+
+// children reads the two children of the node key.
+func (m *Memory) children(key nodeKey) (Node, Node, error) {
+ var children [2]Node
+ for n := range children {
+ child, built, err := m.tree.Node(key.level-1, 2*key.index+n)
+ if err != nil {
+ return Node{}, Node{}, err
+ }
+
+ if !built {
+ return Node{}, Node{}, fmt.Errorf("node (%d, %d) is not built", key.level-1, 2*key.index+n)
+ }
+
+ children[n] = child
}
+
+ return children[0], children[1], nil
}
-// dispatch starts the builds that are ready, up to the limit.
+// dispatch starts the builds that are ready, up to the limit. A build whose
+// input cannot be read fails and waits for the next message.
func (m *Memory) dispatch() {
for m.ctx.Err() == nil {
key, ready := m.queue.Next()
return
}
- task := m.task(key)
+ task, err := m.task(key)
+ if err != nil {
+ m.queue.Fail(key)
+ continue
+ }
+
m.workers.Add(1)
go m.run(key, task)
}
}
-// task returns the build task of the node key.
-func (m *Memory) task(key nodeKey) Task {
+// task returns the build task of the node key, with its input read from the log
+// or the tree.
+func (m *Memory) task(key nodeKey) (Task, error) {
task := Task{
Level: key.level,
Index: key.index,
}
if key.level == 0 {
- task.Input = []string{leafSource(m.log.Message(key.index))}
- return task
+ message, err := m.log.Message(key.index)
+ if err != nil {
+ return Task{}, err
+ }
+
+ task.Input = []string{leafSource(message)}
+
+ return task, nil
}
- for _, index := range []int{2 * key.index, 2*key.index + 1} {
- child, _ := m.tree.Node(key.level-1, index)
+ left, right, err := m.children(key)
+ if err != nil {
+ return Task{}, err
+ }
+
+ for _, child := range []Node{left, right} {
task.Input = append(task.Input, strings.ReplaceAll(child.Text, "\n", " "))
}
- return task
+ return task, nil
}
// run builds one node with the summarizer. A failed build stays in the queue
m.mutex.Lock()
defer m.mutex.Unlock()
- return m.chat.Render(m.tree)
+ return m.chat.Render()
}
// Context returns the compaction view for the build of node (l, i). It ends
end = nodeEnd(level, index)
}
- return m.cview.Context(m.tree, end)
-}
-
-// writeFileAtomic replaces the file at path with data. A reader or a crash sees
-// the old file or the new file, never a part of one.
-func writeFileAtomic(path string, data []byte) error {
- dir := filepath.Dir(path)
- file, err := os.CreateTemp(dir, "."+filepath.Base(path)+".*")
- if err != nil {
- return fmt.Errorf("create temporary file: %w", err)
- }
-
- _, err = file.Write(data)
- if err == nil {
- err = file.Sync()
- }
-
- err = errors.Join(err, file.Close())
- if err == nil {
- err = os.Rename(file.Name(), path)
- }
-
- if err != nil {
- return errors.Join(fmt.Errorf("replace file: %w", err), os.Remove(file.Name()))
- }
-
- return syncDir(dir)
-}
-
-// syncDir flushes the entries of dir to the disk.
-func syncDir(dir string) (err error) {
- handle, err := os.Open(dir)
- if err != nil {
- return fmt.Errorf("open directory: %w", err)
- }
-
- defer func() {
- err = errors.Join(err, handle.Close())
- }()
-
- err = handle.Sync()
- if err != nil {
- return fmt.Errorf("flush directory: %w", err)
- }
-
- return nil
+ return m.cview.Context(end)
}
projects / onechat / blobdiff