Method open_tree

graphlite/src/storage/persistent/memory.rs:122–139

(&self, name: &str)

    }

    fn open_tree(&self, name: &str) -> StorageResult<Self::Tree> {
        let mut trees = self.trees.write();

        if let Some(tree) = trees.get(name) {
            Ok(Box::new(MemoryTree {
                data: tree.data.clone(),
            }) as Box<dyn StorageTree>)
        } else {
            let tree = Arc::new(MemoryTree {
                data: Arc::new(RwLock::new(HashMap::new())),
            });
            trees.insert(name.to_string(), tree.clone());

            Ok(Box::new(MemoryTree {
                data: tree.data.clone(),
            }) as Box<dyn StorageTree>)
        }
    }

    fn list_trees(&self) -> StorageResult<Vec<String>> {
        Ok(self.trees.read().keys().cloned().collect())