Restructure Java API

.github/workflows/ci-workflow.yml

@@ -34,6 +34,9 @@ jobs:
       - name: Node.js test
         run: CC=gcc CXX=g++ make nodejstest NUM_THREADS=32
 
+      - name: Java test
+        run: CC=gcc CXX=g++ make javatest NUM_THREADS=32
+
       - name: Rust test
         run: CC=gcc CXX=g++ make rusttest NUM_THREADS=32
 
@@ -109,6 +112,9 @@ jobs:
 
       - name: Node.js test
         run: CC=clang-14 CXX=clang++-14 make nodejstest NUM_THREADS=32
+
+      - name: Java test
+        run: CC=clang-14 CXX=clang++-14 make javatest NUM_THREADS=32
 
   msvc-build-test:
     name: msvc build & test

.gitignore

@@ -41,21 +41,8 @@ scripts/pre-compiled-bins/lib*
 scripts/pre-compiled-bins/kuzu*
 
 # Java API
-tools/java_api/CMakeFiles/
-tools/java_api/Testing/
-tools/java_api/testdb/
-tools/java_api/testdb/
-tools/java_api_falied/
-tools/test_java_api/
-tools/java_api/cmake_install.cmake
-tools/java_api/Notes.txt
-tools/java_api/CMakeCache.txt
-tools/java_api/CTestTestfile.cmake
-tools/java_api/*.log
+tools/java_api/build
+tools/java_api/test_db/
 tools/java_api/*.jar
-tools/java_api/*.dylib
-tools/java_api/test.java
 tools/java_api/*.class
-tools/java_api/KuzuNative.h
-tools/java_api/error.txt
-tools/java_api/Makefile
+tools/java_api/*.log

CMakeLists.txt

@@ -9,6 +9,28 @@ set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
+# Detect OS and architecture, copied from DuckDB
+set(OS_NAME "unknown")
+set(OS_ARCH "amd64")
+
+string(REGEX MATCH "(arm64|aarch64)" IS_ARM "${CMAKE_SYSTEM_PROCESSOR}")
+if(IS_ARM)
+  set(OS_ARCH "arm64")
+elseif(FORCE_32_BIT)
+  set(OS_ARCH "i386")
+endif()
+
+if(APPLE)
+  set(OS_NAME "osx")
+endif()
+if(WIN32)
+  set(OS_NAME "windows")
+endif()
+if(UNIX AND NOT APPLE)
+  set(OS_NAME "linux") # sorry BSD
+endif()
+
+
 if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Release)
 endif()

Makefile

@@ -94,6 +94,11 @@ nodejs: arrow
 	cmake $(GENERATOR) $(FORCE_COLOR) $(SANITIZER_FLAG) -DCMAKE_BUILD_TYPE=Release -DBUILD_NODEJS=TRUE ../.. && \
 	cmake --build . --config Release -- -j $(NUM_THREADS)
 
+java:
+	$(call mkdirp,build/release) && cd build/release && \
+	cmake $(GENERATOR) $(FORCE_COLOR) $(SANITIZER_FLAG) -DCMAKE_BUILD_TYPE=Release -DBUILD_JAVA=TRUE ../.. && \
+	cmake --build . --config Release -- -j $(NUM_THREADS)
+
 test: arrow
 	$(call mkdirp,build/release) && cd build/release && \
 	cmake $(GENERATOR) $(FORCE_COLOR) $(SANITIZER_FLAG) -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTS=TRUE ../.. && \
@@ -118,6 +123,19 @@ nodejstest: arrow
 	cd $(ROOT_DIR)/tools/nodejs_api/ && \
 	npm test
 
+javatest: arrow
+ifeq ($(OS),Windows_NT)
+	$(MAKE) java
+	$(call mkdirp,tools/java_api/build/test)  && cd tools/java_api/ && \
+	javac -d build/test -cp ".;build/kuzu_java.jar;third_party/junit-platform-console-standalone-1.9.3.jar"  -sourcepath src/test/java/com/kuzudb/test/*.java && \
+	java -jar third_party/junit-platform-console-standalone-1.9.3.jar -cp ".;build/kuzu_java.jar;build/test/" --scan-classpath --include-package=com.kuzudb.java_test --details=verbose
+else
+	$(MAKE) java
+	$(call mkdirp,tools/java_api/build/test)  && cd tools/java_api/ && \
+	javac -d build/test -cp ".:build/kuzu_java.jar:third_party/junit-platform-console-standalone-1.9.3.jar"  -sourcepath src/test/java/com/kuzudb/test/*.java && \
+	java -jar third_party/junit-platform-console-standalone-1.9.3.jar -cp ".:build/kuzu_java.jar:build/test/" --scan-classpath --include-package=com.kuzudb.java_test --details=verbose
+endif
+
 rusttest:
 ifeq ($(OS),Windows_NT)
 	cd $(ROOT_DIR)/tools/rust_api && \
@@ -137,14 +155,21 @@ else
 	rm -rf tools/python_api/build
 endif
 
+clean-java:
+ifeq ($(OS),Windows_NT)
+	if exist tools\java_api\build rmdir /s /q tools\java_api\build
+else
+	rm -rf tools/java_api/build
+endif
+
 clean-external:
 ifeq ($(OS),Windows_NT)
 	if exist external\build rmdir /s /q external\build
 else
 	rm -rf external/build
 endif
 
-clean: clean-python-api
+clean: clean-python-api clean-java
 ifeq ($(OS),Windows_NT)
 	if exist build rmdir /s /q build
 else

scripts/dockerized-ci-tests-runner/Dockerfile

@@ -4,8 +4,9 @@ ENV DEBIAN_FRONTEND=noninteractive
 # Install dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends apt-utils curl ca-certificates apt-transport-https gnupg software-properties-common
 RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
-RUN apt-get update && apt-get install -y g++ gcc clang-14 python3-dev python3-pip python-is-python3 cmake nodejs jq curl sudo git clang-format-11 lsb-release wget lcov libssl-dev libcurl4-openssl-dev rustfmt rustc cargo
+RUN apt-get update && apt-get install -y g++ gcc clang-14 python3-dev python3-pip python-is-python3 cmake nodejs jq curl sudo git clang-format-11 lsb-release wget lcov libssl-dev libcurl4-openssl-dev rustfmt rustc cargo openjdk-17-jdk
 
+ENV JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
 RUN useradd --create-home runner
 USER runner
 

third_party/antlr4_runtime/CMakeLists.txt

@@ -320,6 +320,7 @@ if (WIN32)
         -DANTLR4CPP_EXPORTS
         -DANTLR4CPP_STATIC
     )
+    set_property(TARGET ${ANTLR4_RUNTIME} PROPERTY CXX_STANDARD 17)
 endif()
 
 

tools/CMakeLists.txt

@@ -1,4 +1,7 @@
 add_subdirectory(shell)
+if(${BUILD_JAVA})
+    add_subdirectory(java_api)
+endif()
 if(${BUILD_NODEJS})
     add_subdirectory(nodejs_api)
 endif()

tools/java_api/CMakeLists.txt

@@ -12,47 +12,38 @@ find_package(JNI REQUIRED)
 if (JNI_FOUND)
     message (STATUS "JNI_INCLUDE_DIRS=${JNI_INCLUDE_DIRS}")
     message (STATUS "JNI_LIBRARIES=${JNI_LIBRARIES}")
+else()
+    message (FATAL_ERROR "Java/JNI not found")
 endif()
 include(UseJava)
 
-enable_testing()
-
-file(GLOB JAVA_SRC_FILES *.java)
+file(GLOB JAVA_SRC_FILES src/main/java/com/kuzudb/*.java)
 
 set(CMAKE_JAVA_COMPILE_FLAGS -source 1.8 -target 1.8 -encoding utf-8)
-add_jar(kuzu_java ${JAVA_SRC_FILES})
+add_jar(kuzu_java ${JAVA_SRC_FILES} 
+    OUTPUT_DIR "${PROJECT_SOURCE_DIR}/build" 
+    GENERATE_NATIVE_HEADERS kuzu_native_header)
 get_target_property(_jarFile kuzu_java JAR_FILE)
 get_target_property(_classDir kuzu_java CLASSDIR)
 
 set (_stubDir "${CMAKE_CURRENT_BINARY_DIR}")
-add_custom_command(
-        OUTPUT KuzuNative.h
-        COMMAND ${Java_JAVAC_EXECUTABLE} 
-        -h .
-        ${JAVA_SRC_FILES}
-)
-
-# generate libfoo.jnilib
-include_directories(${JNI_INCLUDE_DIRS} ${_classDir} ${_stubDir} ../../src/include)
-include_directories(../../third_party/antlr4_cypher/include)
-include_directories(../../third_party/antlr4_runtime/src)
-include_directories(../../third_party/spdlog)
-include_directories(../../third_party/nlohmann_json)
-include_directories(../../third_party/pyparse)
-include_directories(../../third_party/utf8proc/include)
-include_directories(../../third_party/pybind11/include)
-include_directories(../../third_party/re2/include)
-include_directories(../../third_party/concurrentqueue)
-
-find_library(KUZU NAMES kuzu PATHS ../../build/release/src)
-
-add_library(kuzu_java_native MODULE kuzu_java.cpp KuzuNative.h)
-set_target_properties(kuzu_java_native PROPERTIES SUFFIX ".dylib")
-target_link_libraries(kuzu_java_native ${JNI_LIBRARIES} ${KUZU})
-
-# add test to run JNIFoo
-add_test(NAME Test
-        COMMAND ${Java_JAVA_EXECUTABLE}
-        -ea
-        -Djava.library.path=${CMAKE_CURRENT_BINARY_DIR}
-        -cp ${_jarFile} tools.java_api.test)
+
+include_directories(${JNI_INCLUDE_DIRS} ${_classDir} ${_stubDir})
+add_library(kuzu_java_native SHARED src/jni/kuzu_java.cpp)
+target_link_libraries(kuzu_java_native PRIVATE kuzu_native_header kuzu)
+
+string(JOIN "_" LIB_SUFFIX ".so" ${OS_NAME} ${OS_ARCH})
+set_target_properties(kuzu_java_native PROPERTIES SUFFIX ${LIB_SUFFIX})
+set_target_properties(kuzu_java_native PROPERTIES PREFIX "lib")
+set_target_properties(kuzu_java_native
+        PROPERTIES
+        LIBRARY_OUTPUT_DIRECTORY "${PROJECT_SOURCE_DIR}/build"
+        RUNTIME_OUTPUT_DIRECTORY "${PROJECT_SOURCE_DIR}/build"
+        ARCHIVE_OUTPUT_DIRECTORY "${PROJECT_SOURCE_DIR}/build")
+
+add_custom_command(OUTPUT dummy_jar_target
+    DEPENDS kuzu_java_native kuzu_java
+    COMMAND ${Java_JAR_EXECUTABLE} uf ${_jarFile} -C 
+            $<TARGET_FILE_DIR:kuzu_java_native> $<TARGET_FILE_NAME:kuzu_java_native>)
+
+add_custom_target(kuzu_java_api ALL DEPENDS dummy_jar_target)

tools/java_api/README.md

@@ -0,0 +1,24 @@
+# Kùzu Java API
+
+## Requirements
+Java 11 or higher
+
+## Build
+
+```
+cd ../.. && make java NUM_THREADS=X 
+```
+
+## Run test
+
+```
+cd ../.. && make javatest NUM_THREADS=X 
+```
+
+## Run `test.java` example
+
+First, build the Java API as described above. Then, run the following command:
+
+```
+java -cp ".:build/kuzu_java.jar" test.java 
+```