import com.google.common.hash.Hashing;
import com.google.common.primitives.UnsignedBytes;
import com.google.common.util.concurrent.SettableFuture;
import java.util.Comparator;

/** Three Guava features whose implementations have an Unsafe fast path (see output/11): hashing, byte comparison, futures. Needs guava on the class path. */
public class GuavaProbe {
    public static void main(String[] args) throws Exception {
        byte[] data = "unsafe-migration".getBytes();
        System.out.println("murmur3_128 = " + Hashing.murmur3_128().hashBytes(data));
        Comparator<byte[]> cmp = UnsignedBytes.lexicographicalComparator();
        System.out.println("comparator   = " + cmp.getClass().getName());
        System.out.println("compare      = " + Integer.signum(cmp.compare(new byte[] {1, 2, 3}, new byte[] {1, 2, 4})));
        SettableFuture<String> f = SettableFuture.create();
        f.set("ok");
        System.out.println("future       = " + f.get());
    }
}