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

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Norman Maurer 2012-04-19 11:58:33 +02:00
parent 2cea0dee73
commit 1a53f9e0bd
1 changed files with 10 additions and 0 deletions
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src/main/java/org/jboss/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 * Utility that detects various properties specific to the current runtime
* environment, such as Java version and the availability of the * environment, such as Java version and the availability of the
* {@code sun.misc.Unsafe} object. * {@code sun.misc.Unsafe} object.
*
* <br>
* You can disable the use of {@code sun.misc.Unsafe} if you specify
* the System property <strong>org.jboss.netty.tryUnsafe</strong> with
* value of <code>false</code>. Default is <code>true</code>.
*/ */
public final class DetectionUtil { public final class DetectionUtil {
@ -41,6 +46,11 @@ public final class DetectionUtil {
} }
private static boolean hasUnsafe(ClassLoader loader) { private static boolean hasUnsafe(ClassLoader loader) {
boolean useUnsafe = Boolean.valueOf(SystemPropertyUtil.get("org.jboss.netty.tryUnsafe", "true"));
if (!useUnsafe) {
return false;
}
try { try {
Class<?> unsafeClazz = Class.forName("sun.misc.Unsafe", true, loader); Class<?> unsafeClazz = Class.forName("sun.misc.Unsafe", true, loader);
return hasUnsafeField(unsafeClazz); return hasUnsafeField(unsafeClazz);