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Allow to disable the use of sun.misc.Unsafe via a System property. See #272

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This commit is contained in:
Norman Maurer 2012-04-19 12:07:17 +02:00
parent e719f23f7d
commit 2ecef07c4a
1 changed files with 14 additions and 0 deletions
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14
common/src/main/java/io/netty/util/internal/DetectionUtil.java
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@ -26,6 +26,11 @@ import java.util.zip.Deflater;
* Utility that detects various properties specific to the current runtime
* environment, such as Java version and the availability of the
* {@code sun.misc.Unsafe} object.
*
* <br>
* You can disable the use of {@code sun.misc.Unsafe} if you specify
* the System property <strong>io.netty.tryUnsafe</strong> with
* value of <code>false</code>. Default is <code>true</code>.
*/
public final class DetectionUtil {
@ -41,6 +46,15 @@ public final class DetectionUtil {
}
private static boolean hasUnsafe(ClassLoader loader) {
String value = SystemPropertyUtil.get("io.netty.tryUnsafe");
if (value == null) {
value = SystemPropertyUtil.get("org.jboss.netty.tryUnsafe", "true");
}
boolean useUnsafe = Boolean.valueOf(value);
if (!useUnsafe) {
return false;
}
try {
Class<?> unsafeClazz = Class.forName("sun.misc.Unsafe", true, loader);
return hasUnsafeField(unsafeClazz);