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Load DuckDB native library by name first #421

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Load DuckDB native library by name first #421

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81 changes: 50 additions & 31 deletions src/main/java/org/duckdb/DuckDBNative.java
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Original file line number Diff line number Diff line change
Expand Up @@ -15,38 +15,48 @@

final class DuckDBNative {
static {
try {
String os_name = "";
String os_arch;
String os_name_detect = System.getProperty("os.name").toLowerCase().trim();
String os_arch_detect = System.getProperty("os.arch").toLowerCase().trim();
switch (os_arch_detect) {
case "x86_64":
case "amd64":
os_arch = "amd64";
break;
case "aarch64":
case "arm64":
os_arch = "arm64";
break;
case "i386":
os_arch = "i386";
break;
default:
throw new IllegalStateException("Unsupported system architecture");
}
if (os_name_detect.startsWith("windows")) {
os_name = "windows";
} else if (os_name_detect.startsWith("mac")) {
os_name = "osx";
os_arch = "universal";
} else if (os_name_detect.startsWith("linux")) {
os_name = "linux";
}
String lib_res_name = "/libduckdb_java.so"
+ "_" + os_name + "_" + os_arch;
String libname = "duckdb_java";
boolean loaded = loadLibraryByName(libname);
if (!loaded) {
// Fallback, load from a classpath or from a local file path
loadLibraryFromFile(libname);
}
}

Path lib_file = Files.createTempFile("libduckdb_java", ".so");
private static void loadLibraryFromFile(String libname) {
String full_libname = "lib" + libname;
String lib_suffix = ".so";
String os_name = "";
String os_arch;
String os_name_detect = System.getProperty("os.name").toLowerCase().trim();
String os_arch_detect = System.getProperty("os.arch").toLowerCase().trim();
switch (os_arch_detect) {
case "x86_64":
case "amd64":
os_arch = "amd64";
break;
case "aarch64":
case "arm64":
os_arch = "arm64";
break;
case "i386":
os_arch = "i386";
break;
default:
throw new IllegalStateException("Unsupported system architecture");
}
if (os_name_detect.startsWith("windows")) {
os_name = "windows";
} else if (os_name_detect.startsWith("mac")) {
os_name = "osx";
os_arch = "universal";
} else if (os_name_detect.startsWith("linux")) {
os_name = "linux";
}
String lib_res_name = "/" + full_libname + lib_suffix
+ "_" + os_name + "_" + os_arch;
try {
Path lib_file = Files.createTempFile(full_libname, lib_suffix);
URL lib_res = DuckDBNative.class.getResource(lib_res_name);
if (lib_res == null) {
System.load(Paths.get("build/debug", lib_res_name).normalize().toAbsolutePath().toString());
Expand All @@ -61,6 +71,15 @@ final class DuckDBNative {
throw new RuntimeException(e);
}
}

private static boolean loadLibraryByName(String libname) {
try {
System.loadLibrary(libname);
return true;
} catch (Throwable e) {
return false;
}
}
// We use zero-length ByteBuffer-s as a hacky but cheap way to pass C++ pointers
// back and forth

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