feat: add load package with cache API

java/Cargo.toml

@@ -9,7 +9,15 @@ doc = false
 
 [dependencies]
 jni = "0.21.1"
+prost = "0.11.8"
+prost-types = "0.11.8"
+serde_json = "1"
+indexmap = "2.2.5"
 anyhow = "1"
+serde = { version = "1", features = ["derive"] }
 kcl-lang = {path = "../"}
 once_cell = "1.19.0"
 lazy_static = "1.4.0"
+kclvm-parser = { git = "https://github.com/peefy/KCLVM", version = "0.8.1" }
+kclvm-sema = { git = "https://github.com/peefy/KCLVM", version = "0.8.1" }
+kclvm-api = { git = "https://github.com/peefy/KCLVM", version = "0.8.1" }

java/src/lib.rs

@@ -1,19 +1,31 @@
 extern crate anyhow;
 extern crate jni;
 extern crate kcl_lang;
+extern crate kclvm_api;
+extern crate kclvm_parser;
+extern crate kclvm_sema;
 extern crate lazy_static;
 extern crate once_cell;
+extern crate prost;
 
 use anyhow::Result;
 use jni::objects::{JByteArray, JClass, JObject};
 use jni::sys::jbyteArray;
 use jni::JNIEnv;
+use kcl_lang::API;
+use kclvm_api::gpyrpc::LoadPackageArgs;
+use kclvm_api::service::KclvmServiceImpl;
+use kclvm_parser::KCLModuleCache;
+use kclvm_sema::resolver::scope::KCLScopeCache;
 use lazy_static::lazy_static;
 use once_cell::sync::OnceCell;
+use prost::Message;
 use std::sync::Mutex;
 
 lazy_static! {
-    static ref API_INSTANCE: Mutex<OnceCell<kcl_lang::API>> = Mutex::new(OnceCell::new());
+    static ref API_INSTANCE: Mutex<OnceCell<API>> = Mutex::new(OnceCell::new());
+    static ref MODULE_CACHE: Mutex<OnceCell<KCLModuleCache>> = Mutex::new(OnceCell::new());
+    static ref SCOPE_CACHE: Mutex<OnceCell<KCLScopeCache>> = Mutex::new(OnceCell::new());
 }
 
 #[no_mangle]
@@ -29,6 +41,18 @@ pub extern "system" fn Java_com_kcl_api_API_callNative(
     })
 }
 
+#[no_mangle]
+pub extern "system" fn Java_com_kcl_api_API_loadPackageWithCache(
+    mut env: JNIEnv,
+    _: JClass,
+    args: JByteArray,
+) -> jbyteArray {
+    intern_load_package_with_cache(&mut env, args).unwrap_or_else(|e| {
+        let _ = throw(&mut env, e);
+        JObject::default().into_raw()
+    })
+}
+
 fn intern_call_native(env: &mut JNIEnv, name: JByteArray, args: JByteArray) -> Result<jbyteArray> {
     let binding = API_INSTANCE.lock().unwrap();
     let api = binding.get_or_init(|| kcl_lang::API::new().expect("Failed to create API instance"));
@@ -39,6 +63,25 @@ fn intern_call_native(env: &mut JNIEnv, name: JByteArray, args: JByteArray) -> R
     Ok(j_byte_array.into_raw())
 }
 
+/// This is a stateful API, so we avoid serialization overhead and directly use JVM
+/// to instantiate global variables here.
+fn intern_load_package_with_cache(env: &mut JNIEnv, args: JByteArray) -> Result<jbyteArray> {
+    // AST module cache
+    let binding = MODULE_CACHE.lock().unwrap();
+    let module_cache = binding.get_or_init(|| KCLModuleCache::default());
+    // Resolver scope cache
+    let binding = SCOPE_CACHE.lock().unwrap();
+    let scope_cache = binding.get_or_init(|| KCLScopeCache::default());
+    // Load package arguments from protobuf bytes.
+    let args = env.convert_byte_array(args)?;
+    let args: LoadPackageArgs = <LoadPackageArgs as Message>::decode(args.as_ref())?;
+    let svc = KclvmServiceImpl::default();
+    // Call load package API and decode the result to protobuf bytes.
+    let packages = svc.load_package_with_cache(&args, module_cache.clone(), scope_cache.clone())?;
+    let j_byte_array = env.byte_array_from_slice(&packages.encode_to_vec())?;
+    Ok(j_byte_array.into_raw())
+}
+
 fn throw(env: &mut JNIEnv, error: anyhow::Error) -> jni::errors::Result<()> {
     env.throw(("java/lang/Exception", error.to_string()))
 }

java/src/main/java/com/kcl/api/API.java

@@ -56,6 +56,7 @@ private static String bundledLibraryPath() {
     }
 
     private native byte[] callNative(byte[] call, byte[] args);
+    private native byte[] loadPackageWithCache(byte[] args);
 
     public API() {
     }
@@ -132,6 +133,39 @@ public LoadPackage_Result loadPackage(LoadPackage_Args args) throws Exception {
         return LoadPackage_Result.parseFrom(call("KclvmService.LoadPackage", args.toByteArray()));
     }
 
+    /**
+     * Loads KCL package with the internal cache and returns the AST, symbol, type, definition information. *
+     *
+     * <p>
+     * Example usage:
+     *
+     * <pre>
+     * {@code
+     * import com.kcl.api.*;
+     *
+     * API api = new API();
+     * LoadPackage_Result result = api.loadPackageWithCache(
+     *     LoadPackage_Args.newBuilder().setResolveAst(true).setParseArgs(
+     *     ParseProgram_Args.newBuilder().addPaths("/path/to/kcl.k").build())
+     *     .build());
+     * result.getSymbolsMap().values().forEach(s -> System.out.println(s));
+     * }
+     * </pre>
+     *
+     * @param args
+     *            the arguments specifying the file paths to be parsed and resolved.
+     * 
+     * @return the result of parsing the program and parse errors, type errors, including the AST in JSON format and
+     *         symbol, type and definition information.
+     * 
+     * @throws Exception
+     *             if an error occurs during the remote procedure call.
+     */
+    @Override
+    public LoadPackage_Result loadPackageWithCache(LoadPackage_Args args) throws Exception {
+        return LoadPackage_Result.parseFrom(callLoadPackageWithCache(args.toByteArray()));
+    }
+
     public ExecProgram_Result execProgram(ExecProgram_Args args) throws Exception {
         return ExecProgram_Result.parseFrom(call("KclvmService.ExecProgram", args.toByteArray()));
     }
@@ -194,6 +228,14 @@ private byte[] call(String name, byte[] args) throws Exception {
         return result;
     }
 
+    private byte[] callLoadPackageWithCache(byte[] args) throws Exception {
+        byte[] result = loadPackageWithCache(args);
+        if (result != null && startsWith(result, "ERROR")) {
+            throw new java.lang.Error(result.toString());
+        }
+        return result;
+    }
+
     static boolean startsWith(byte[] array, String prefix) {
         byte[] prefixBytes = prefix.getBytes();
         if (array.length < prefixBytes.length) {

java/src/main/java/com/kcl/api/Service.java

@@ -12,6 +12,9 @@ public interface Service {
     // Loads KCL package and returns the AST, symbol, type, definition information.
     LoadPackage_Result loadPackage(LoadPackage_Args args) throws Exception;
 
+    // Loads KCL package and returns the AST, symbol, type, definition information.
+    LoadPackage_Result loadPackageWithCache(LoadPackage_Args args) throws Exception;
+
     // Execute KCL file with args
     ExecProgram_Result execProgram(ExecProgram_Args args) throws Exception;
 

java/src/test/java/com/kcl/LoadPackageTest.java

@@ -51,4 +51,41 @@ public void testProgramSymbols() throws Exception {
         // Query Scope using the symbol
         Assert.assertEquals(SematicUtil.findScopeBySymbol(result, appSymbolIndex).getDefsCount(), 2);
     }
+
+    @Test
+    public void testProgramSymbolsWithCache() throws Exception {
+        // API instance
+        API api = new API();
+        // Note call `loadPackageWithCache` here.
+        LoadPackage_Result result = api.loadPackageWithCache(LoadPackage_Args.newBuilder().setResolveAst(true)
+                .setWithAstIndex(true)
+                .setParseArgs(ParseProgram_Args.newBuilder().addPaths("./src/test_data/schema.k").build()).build());
+        // Get parse errors
+        Assert.assertEquals(result.getParseErrorsList().size(), 0);
+        // Get Type errors
+        Assert.assertEquals(result.getTypeErrorsList().size(), 0);
+        // Get AST
+        Program program = JsonUtil.deserializeProgram(result.getProgram());
+        Assert.assertTrue(program.getRoot().contains("test_data"));
+        // Variable definitions in the main scope.
+        Scope mainScope = SematicUtil.findMainPackageScope(result);
+        // Child scopes of the main scope.
+        Assert.assertEquals(mainScope.getChildrenList().size(), 2);
+        // Mapping AST node to Symbol type
+        NodeRef<Stmt> stmt = program.getFirstModule().getBody().get(0);
+        Assert.assertTrue(SematicUtil.findSymbolByAstId(result, stmt.getId()).getName().contains("pkg"));
+        // Mapping symbol to AST node
+        SymbolIndex appSymbolIndex = mainScope.getDefs(1);
+        Symbol appSymbol = SematicUtil.findSymbol(result, appSymbolIndex);
+        Assert.assertEquals(appSymbol.getTy().getSchemaName(), "AppConfig");
+        // Query type symbol using variable type.
+        String schemaFullName = appSymbol.getTy().getPkgPath() + "." + appSymbol.getTy().getSchemaName();
+        Symbol appConfigSymbol = SematicUtil.findSymbol(result,
+                result.getFullyQualifiedNameMapOrDefault(schemaFullName, null));
+        Assert.assertEquals(appConfigSymbol.getTy().getSchemaName(), "AppConfig");
+        // Query AST node using the symbol
+        Assert.assertNotNull(SematicUtil.findNodeBySymbol(result, appSymbolIndex));
+        // Query Scope using the symbol
+        Assert.assertEquals(SematicUtil.findScopeBySymbol(result, appSymbolIndex).getDefsCount(), 2);
+    }
 }