diff --git a/cozo-lib-java/Cargo.toml b/cozo-lib-java/Cargo.toml
index 5bd35a63..62328778 100644
--- a/cozo-lib-java/Cargo.toml
+++ b/cozo-lib-java/Cargo.toml
@@ -12,6 +12,7 @@ description = "Java bindings for CozoDB"
 crate-type = ["cdylib"]
 
 [features]
+storage-rocksdb = ["cozo/storage-rocksdb"]
 jemalloc = ["cozo/jemalloc"]
 io-uring = ["cozo/io-uring"]
 
@@ -19,5 +20,6 @@ io-uring = ["cozo/io-uring"]
 
 [dependencies]
 robusta_jni = "0.2.0"
-cozo = { version = "0.1.3", path = "../cozo-core" }
+# , features = ["compact"]
+cozo = { version = "0.1.3", path = "../cozo-core", default_features = false }
 lazy_static = "1.4.0"
diff --git a/cozo-lib-java/build.sh b/cozo-lib-java/build.sh
new file mode 100755
index 00000000..c90852d9
--- /dev/null
+++ b/cozo-lib-java/build.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+export ANDROID_HOME=/Users/$USER/Library/Android/sdk
+export NDK_HOME=/Users/$USER/Library/Android/sdk/ndk/23.1.7779620/
+export PATH=$PATH:$HOME/Library/Android/sdk/ndk/23.1.7779620/toolchains/llvm/prebuilt/darwin-x86_64/bin/
+export CC=aarch64-linux-android23-clang
+export CXX=aarch64-linux-android23-clang++
+export LD=$HOME/Library/Android/sdk/ndk/23.1.7779620/toolchains/llvm/prebuilt/darwin-x86_64/bin/ld
+export LD_LIBRARY_PATH=/Users/zh217/Library/Android/sdk/ndk/23.1.7779620/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/aarch64-linux-android/26
+cargo build --release -p cozo_c --target=aarch64-linux-android
\ No newline at end of file
diff --git a/cozo-lib-java/src/lib.rs b/cozo-lib-java/src/lib.rs
index 18090058..31ce0768 100644
--- a/cozo-lib-java/src/lib.rs
+++ b/cozo-lib-java/src/lib.rs
@@ -11,23 +11,32 @@ use std::sync::Mutex;
 
 use lazy_static::lazy_static;
 use robusta_jni::bridge;
+use robusta_jni::jni::errors::Error as JniError;
+use robusta_jni::jni::errors::Result as JniResult;
 
-use cozo::Db;
-use cozo::RocksDbStorage;
+use cozo::*;
 
 #[derive(Default)]
-struct Handles<S> {
+struct Handles {
     current: AtomicI32,
-    dbs: Mutex<BTreeMap<i32, Db<S>>>,
+    dbs: Mutex<BTreeMap<i32, DbInstance>>,
 }
 
 lazy_static! {
-    static ref HANDLES: Handles<RocksDbStorage> = Handles {
+    static ref HANDLES: Handles = Handles {
         current: Default::default(),
         dbs: Mutex::new(Default::default())
     };
 }
 
+fn get_db(id: i32) -> JniResult<DbInstance> {
+    let db_ref = {
+        let dbs = HANDLES.dbs.lock().unwrap();
+        dbs.get(&id).cloned()
+    };
+    db_ref.ok_or_else(|| JniError::from("database already closed"))
+}
+
 #[bridge]
 mod jni {
     use std::sync::atomic::Ordering;
@@ -37,9 +46,9 @@ mod jni {
     use robusta_jni::jni::errors::Result as JniResult;
     use robusta_jni::jni::objects::AutoLocal;
 
-    use cozo::{new_cozo_rocksdb};
+    use cozo::*;
 
-    use crate::HANDLES;
+    use crate::{get_db, HANDLES};
 
     #[derive(Signature, TryIntoJavaValue, IntoJavaValue, TryFromJavaValue)]
     #[package(org.cozodb)]
@@ -49,8 +58,8 @@ mod jni {
     }
 
     impl<'env: 'borrow, 'borrow> CozoDb<'env, 'borrow> {
-        pub extern "jni" fn openDb(path: String) -> JniResult<i32> {
-            match new_cozo_rocksdb(path) {
+        pub extern "jni" fn openDb(kind: String, path: String) -> JniResult<i32> {
+            match DbInstance::new(&kind, &path, Default::default()) {
                 Ok(db) => {
                     let id = HANDLES.current.fetch_add(1, Ordering::AcqRel);
                     let mut dbs = HANDLES.dbs.lock().unwrap();
@@ -72,15 +81,24 @@ mod jni {
             script: String,
             params_str: String,
         ) -> JniResult<String> {
-            let db = {
-                let db_ref = {
-                    let dbs = HANDLES.dbs.lock().unwrap();
-                    dbs.get(&id).cloned()
-                };
-                let db = db_ref.ok_or_else(|| JniError::from("database already closed"))?;
-                db
-            };
+            let db = get_db(id)?;
             Ok(db.run_script_str(&script, &params_str))
         }
+        pub extern "jni" fn exportRelations(id: i32, relations_str: String) -> JniResult<String> {
+            let db = get_db(id)?;
+            Ok(db.export_relations_str(&relations_str))
+        }
+        pub extern "jni" fn importRelation(id: i32, data: String) -> JniResult<String> {
+            let db = get_db(id)?;
+            Ok(db.import_relation_str(&data))
+        }
+        pub extern "jni" fn backup(id: i32, out_file: String) -> JniResult<String> {
+            let db = get_db(id)?;
+            Ok(db.backup_db_str(&out_file))
+        }
+        pub extern "jni" fn restore(id: i32, in_file: String) -> JniResult<String> {
+            let db = get_db(id)?;
+            Ok(db.restore_backup_str(&in_file))
+        }
     }
 }
diff --git a/cozo-lib-swift/Cargo.toml b/cozo-lib-swift/Cargo.toml
index 7f1c66ce..d2ee49eb 100644
--- a/cozo-lib-swift/Cargo.toml
+++ b/cozo-lib-swift/Cargo.toml
@@ -10,6 +10,8 @@ crate-type = ["staticlib"]
 
 [features]
 storage-rocksdb = ["cozo/storage-rocksdb"]
+jemalloc = ["cozo/jemalloc"]
+io-uring = ["cozo/io-uring"]
 
 [build-dependencies]
 swift-bridge-build = "0.1.41"