| | |
|---|
| | | { |
|---|
| | | Method tmpDirectBufferCleanerMethod = null; |
|---|
| | | Method tmpDirectBufferCleanerCleanMethod = null; |
|---|
| | | boolean tmpCleanSupported; |
|---|
| | | try |
|---|
| | | { |
|---|
| | | tmpDirectBufferCleanerMethod = Class.forName("java.nio.DirectByteBuffer").getMethod("cleaner"); |
|---|
| | | tmpDirectBufferCleanerMethod.setAccessible(true); |
|---|
| | | tmpDirectBufferCleanerCleanMethod = Class.forName("sun.misc.Cleaner").getMethod("clean"); |
|---|
| | | tmpDirectBufferCleanerCleanMethod.setAccessible(true); |
|---|
| | | tmpCleanSupported = true; |
|---|
| | | } |
|---|
| | | catch (Exception e) |
|---|
| | | { |
|---|
| | | tmpCleanSupported = false; |
|---|
| | | boolean tmpCleanSupported = false; |
|---|
| | | // |
|---|
| | | // We know that this will fail in Java 9+ since sun.misc.Cleaner was moved to jdk.internal.ref.Cleaner (see JDK-8148117) |
|---|
| | | // Also in Java9+, calling 'setAccessible(true)' to Java internal classes generates warnings: |
|---|
| | | // * WARNING: An illegal reflective access operation has occurred |
|---|
| | | // * WARNING: All illegal access operations will be denied in a future release |
|---|
| | | // unless the JVM is started with the 'add-opens=java.base/java.nio=ALL-UNNAMED' flag |
|---|
| | | // Since this is only an optimization, avoid it completely in Java 9+ |
|---|
| | | // |
|---|
| | | if (System.getProperty("java.version").startsWith("1.")) { |
|---|
| | | try |
|---|
| | | { |
|---|
| | | tmpDirectBufferCleanerMethod = Class.forName("java.nio.DirectByteBuffer").getMethod("cleaner"); |
|---|
| | | tmpDirectBufferCleanerMethod.setAccessible(true); |
|---|
| | | tmpDirectBufferCleanerCleanMethod = Class.forName("sun.misc.Cleaner").getMethod("clean"); |
|---|
| | | tmpDirectBufferCleanerCleanMethod.setAccessible(true); |
|---|
| | | tmpCleanSupported = true; |
|---|
| | | } |
|---|
| | | catch (Exception e) |
|---|
| | | { |
|---|
| | | tmpCleanSupported = false; |
|---|
| | | } |
|---|
| | | } |
|---|
| | | CLEAN_SUPPORTED = tmpCleanSupported; |
|---|
| | | directBufferCleanerMethod = tmpDirectBufferCleanerMethod; |
|---|
