/** Usually returns MAC address (48 bits = 6 bytes). */
public static byte[] getMacAddress(final InetAddress addr) {
if (SystemUtils.getJavaVersion() < 1.6f) {
return null; // getHardwareAddress is not supported
}
final NetworkInterface ni;
try {
ni = NetworkInterface.getByInetAddress(addr);
} catch (SocketException e) {
return null;
}
if (ni != null) {
final byte[] mac;
try {
mac = ni.getHardwareAddress();
} catch (SocketException e) {
return null;
}
return mac;
}
return null;
}
static {
final String counter = System.getProperty("xbird.counter");
if ("cliffc".equals(counter)) {
counterType = CounterType.cliffc;
} else if ("stripe".equals(counter)) {
counterType = CounterType.stripe;
} else if ("stripe2".equals(counter)) {
counterType = CounterType.stripe2;
} else if ("stripe3".equals(counter)) {
counterType = CounterType.stripe3;
} else if ("atomic".equals(counter)) {
counterType = CounterType.atomic;
} else {
counterType = CounterType.auto;
}
int nstripe = Integer.parseInt(Settings.get("xbird.util.counter.nstripe", "-1"));
if (nstripe == -1) {
int procs = SystemUtils.availableProcessors();
nstripe = Math.max(4, procs >> 3); // 4 < x < 8
}
NSTRIPE = nstripe;
}
public static ICounter createIntCounter(int nstripe) {
final int procs = SystemUtils.availableProcessors();
switch (counterType) {
case cliffc:
return new HighScalableIntCounter();
case stripe:
return new StripeAtomicIntCounter(nstripe);
case stripe2:
return new StripeAtomicIntCounter2(nstripe);
case stripe3:
return new StripeAtomicIntCounter3(nstripe);
case atomic:
return new AtomicIntCounter();
case auto:
default:
if (procs > 64) {
return new HighScalableIntCounter();
} else if (procs > 32) {
return new StripeAtomicIntCounter(nstripe);
} else {
return new AtomicIntCounter();
}
}
}