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import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import org.aspectj.lang.reflect.FieldSignature;
@Retention(RetentionPolicy.RUNTIME)
@interface Marker {
String message();
}
public class AnnoBinding {
public static void main(String[] argv) {
long stime = System.nanoTime();
// 10,000 or 100,000 rounds are too quick, making the test flaky on rare occasions
final int ROUNDS = 1000 * 1000;
for (int i = 0; i < ROUNDS; i++) {
runOne();
}
long etime = System.nanoTime();
long reflective = (etime - stime);
stime = System.nanoTime();
for (int i = 0; i < ROUNDS; i++) {
runTwo();
}
etime = System.nanoTime();
long bound = (etime - stime);
String result = String.format("bound = %,d, reflective = %,d", bound, reflective);
System.out.println(result);
if (bound > reflective) {
throw new RuntimeException(
"Accessing annotation via bound parameter should be faster than reflective access: " + result
);
}
if (X.sumReflective != X.sumBound) {
throw new RuntimeException(
String.format("Sums of @Marker message lengths should be equal: reflective = %,d, bound = %,d", X.sumReflective, X.sumBound)
);
}
}
@Marker(message = "string")
static int field1;
@Marker(message = "string")
static int field2;
public static void runOne() {
field1 = field1 * 2; // set and get jps
}
public static void runTwo() {
field1 = field1 * 2; // set and get jps
}
}
aspect X {
pointcut pReflective(): withincode(* runOne(..)) && get(@Marker * *);
pointcut pBound(Marker marker): withincode(* runTwo(..)) && get(@Marker * * ) && @annotation(marker);
public static int sumReflective, sumBound;
before(): pReflective() {
Marker marker = (Marker) ((FieldSignature) thisJoinPointStaticPart.getSignature()).getField().getAnnotation(Marker.class);
sumReflective += marker.message().length();
}
before(Marker marker): pBound(marker) {
sumBound += marker.message().length();
}
}
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