3 files changed, 14 insertions, 3 deletions
diff --git a/database/src/backends/memory.rs b/database/src/backends/memory.rs
index 2f19ce6..f1952a3 100644
--- a/database/src/backends/memory.rs
+++ b/database/src/backends/memory.rs
@@ -20,7 +20,7 @@ impl KV for Memory {
         self.0.write().unwrap().insert(key.to_vec(), value.to_vec());
         Ok(())
     }
-    fn get<'a>(&'a self, key: &[u8]) -> Result<Option<Vec<u8>>> {
+    fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>> {
         Ok(self.0.read().unwrap().get(key).cloned())
     }
     fn del(&self, key: &[u8]) -> Result<()> {
diff --git a/database/src/backends/mod.rs b/database/src/backends/mod.rs
index b6d3770..814cc50 100644
--- a/database/src/backends/mod.rs
+++ b/database/src/backends/mod.rs
@@ -8,7 +8,9 @@ pub mod memory;
 pub mod redb;
 pub mod rocksdb;
 
-use anyhow::Result;
+use crate::backends::{memory::Memory, redb::Redb, rocksdb::Rocksdb};
+use anyhow::{Result, bail};
+use std::{path::Path, sync::Arc};
 
 pub trait KV {
     fn set(&self, key: &[u8], value: &[u8]) -> Result<()>;
@@ -17,3 +19,12 @@ pub trait KV {
     fn next(&self, key: &[u8]) -> Result<Option<Vec<u8>>>;
     fn prev(&self, key: &[u8]) -> Result<Option<Vec<u8>>>;
 }
+
+pub fn create_backend(driver: &str, path: &Path) -> Result<Arc<dyn KV>> {
+    Ok(match driver {
+        "rocksdb" => Arc::new(Rocksdb::new(path)?),
+        "redb" => Arc::new(Redb::new(path)?),
+        "memory" => Arc::new(Memory::new()),
+        _ => bail!("unknown db driver"),
+    })
+}
diff --git a/database/src/backends/rocksdb.rs b/database/src/backends/rocksdb.rs
index f4ed55b..31229a9 100644
--- a/database/src/backends/rocksdb.rs
+++ b/database/src/backends/rocksdb.rs
@@ -25,7 +25,7 @@ impl KV for Rocksdb {
     fn set(&self, key: &[u8], value: &[u8]) -> Result<()> {
         Ok(self.db.put(key, value)?)
     }
-    fn get<'a>(&'a self, key: &[u8]) -> Result<Option<Vec<u8>>> {
+    fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>> {
         Ok(self.db.get(key)?)
     }
     fn del(&self, key: &[u8]) -> Result<()> {