com.firefly.net.tcp.secure.openssl.nativelib.CleanerJava9 Maven / Gradle / Ivy
package com.firefly.net.tcp.secure.openssl.nativelib;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
/**
* Provide a way to clean a ByteBuffer on Java9+.
*/
final class CleanerJava9 implements Cleaner {
private static final Logger logger = LoggerFactory.getLogger("firefly-system");
private static final Method INVOKE_CLEANER;
static {
final Method method;
final Throwable error;
if (PlatformDependent0.hasUnsafe()) {
ByteBuffer buffer = ByteBuffer.allocateDirect(1);
Object maybeInvokeMethod;
try {
// See https://bugs.openjdk.java.net/browse/JDK-8171377
Method m = PlatformDependent0.UNSAFE.getClass().getDeclaredMethod("invokeCleaner", ByteBuffer.class);
m.invoke(PlatformDependent0.UNSAFE, buffer);
maybeInvokeMethod = m;
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
maybeInvokeMethod = e;
}
if (maybeInvokeMethod instanceof Throwable) {
method = null;
error = (Throwable) maybeInvokeMethod;
} else {
method = (Method) maybeInvokeMethod;
error = null;
}
} else {
method = null;
error = new UnsupportedOperationException("sun.misc.Unsafe unavailable");
}
if (error == null) {
logger.debug("java.nio.ByteBuffer.cleaner(): available");
} else {
logger.debug("java.nio.ByteBuffer.cleaner(): unavailable", error);
}
INVOKE_CLEANER = method;
}
static boolean isSupported() {
return INVOKE_CLEANER != null;
}
@Override
public void freeDirectBuffer(ByteBuffer buffer) {
try {
INVOKE_CLEANER.invoke(PlatformDependent0.UNSAFE, buffer);
} catch (Throwable cause) {
PlatformDependent0.throwException(cause);
}
}
}