horizonzy commented on code in PR #3824:
URL: https://github.com/apache/bookkeeper/pull/3824#discussion_r1122600375
##########
bookkeeper-server/src/main/java/org/apache/bookkeeper/util/PageCacheUtil.java:
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@@ -18,41 +18,37 @@
package org.apache.bookkeeper.util;
-import com.sun.jna.LastErrorException;
-import com.sun.jna.Native;
import java.io.FileDescriptor;
import java.lang.reflect.Field;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.experimental.UtilityClass;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.bookkeeper.common.util.nativeio.NativeIO;
+import org.apache.bookkeeper.common.util.nativeio.NativeIOImpl;
/**
* Native I/O operations.
*/
-public final class NativeIO {
- private static final Logger LOG = LoggerFactory.getLogger(NativeIO.class);
+@UtilityClass
+@Slf4j
+public final class PageCacheUtil {
private static final int POSIX_FADV_DONTNEED = 4; /* fadvise.h */
- private static boolean initialized = false;
private static boolean fadvisePossible = true;
+ private static final NativeIO NATIVE_IO;
+
static {
+ NativeIO nativeIO = null;
try {
- Native.register("c");
- initialized = true;
- } catch (NoClassDefFoundError e) {
- LOG.info("JNA not found. Native methods will be disabled.");
- } catch (UnsatisfiedLinkError e) {
- LOG.info("Unable to link C library. Native methods will be
disabled.");
- } catch (NoSuchMethodError e) {
- LOG.warn("Obsolete version of JNA present; unable to register C
library");
+ nativeIO = new NativeIOImpl();
Review Comment:
We should check if `nativeIO.posix_fdavise` works or not. `new
NativeIOImpl()` din't ensure `posix_fdavise` work
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