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import org.aspectj.lang.*;
import org.aspectj.lang.reflect.*;
import java.lang.annotation.*;
@Retention(RetentionPolicy.RUNTIME)
@interface Marker {
String message();
}
public class Perf {
public static void main(String []argv) {
run(true);
run(false);
}
public static void run(boolean warmup) {
long stime = System.currentTimeMillis();
for (int i=0;i<1000000;i++) {
runOne();
}
long etime = System.currentTimeMillis();
long manual = (etime-stime);
stime = System.currentTimeMillis();
for (int i=0;i<1000000;i++) {
runTwo();
}
etime = System.currentTimeMillis();
long woven = (etime-stime);
stime = System.currentTimeMillis();
for (int i=0;i<1000000;i++) {
runThree();
}
etime = System.currentTimeMillis();
long optimal = (etime-stime);
if (!warmup) {
System.out.println("Manually fetching annotation with getAnnotation(): "+manual+"ms");
System.out.println("Binding annotation with @annotation(Marker): "+woven+"ms");
System.out.println("Binding annotation value with @annotation(Marker(message)): "+optimal+"ms");
}
if (woven>manual) {
throw new RuntimeException("woven = "+woven+" manual = "+manual);
}
if (optimal>woven) {
throw new RuntimeException("optimal = "+optimal+" woven = "+woven);
}
}
@Marker(message="string")
public static void runOne() {
}
@Marker(message="string")
public static void runTwo() {
}
@Marker(message="string")
public static void runThree() {
}
}
aspect X {
public static int a,b,c;
// CaseOne: annotation fetching is done in the advice:
pointcut adviceRetrievesAnnotation(): execution(@Marker * runOne(..));
before(): adviceRetrievesAnnotation() {
Marker marker = (Marker) ((MethodSignature) thisJoinPointStaticPart.getSignature()).getMethod().getAnnotation(Marker.class);
String s = marker.message();
a+=s.length();
}
// CaseTwo: annotation binding is done in the pointcut, advice retrieves message
pointcut pointcutBindsAnnotation(Marker l): execution(@Marker * runTwo(..)) && @annotation(l);
before(Marker l): pointcutBindsAnnotation(l) {
String s = l.message();
b+=s.length();
}
// CaseThree: annotation binding directly targets the message value in the annotation
pointcut pointcutBindsAnnotationValue(String msg): execution(@Marker * runThree(..)) && @annotation(Marker(msg));
before(String s): pointcutBindsAnnotationValue(s) {
c+=s.length();
}
}
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