/*
* Joinery -- Data frames for Java
* Copyright (c) 2014, 2015 IBM Corp.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package joinery.impl;
import java.io.File;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.ConstructorSignature;
import org.aspectj.lang.reflect.FieldSignature;
import org.aspectj.lang.reflect.MethodSignature;
import com.codahale.metrics.ConsoleReporter;
import com.codahale.metrics.CsvReporter;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.SharedMetricRegistries;
import com.codahale.metrics.Timer;
import com.codahale.metrics.annotation.Timed;
@Aspect
public class Metrics {
private static final MetricRegistry registry = SharedMetricRegistries.getOrCreate("joinery");
private static Annotation getAnnotation(final Signature signature,
final Class<? extends Annotation> annotationClass) {
if (signature instanceof ConstructorSignature) {
final Constructor<?> ctor = ConstructorSignature.class.cast(signature)
.getConstructor();
return ctor.getAnnotation(annotationClass);
} else if (signature instanceof MethodSignature) {
return MethodSignature.class.cast(signature)
.getMethod()
.getAnnotation(annotationClass);
} else if (signature instanceof FieldSignature) {
return FieldSignature.class.cast(signature)
.getField()
.getAnnotation(annotationClass);
}
throw new RuntimeException(
"Unsupported signature type " + signature.getClass().getName()
);
}
private static String name(final Signature signature, final String name,
final String suffix, final boolean absolute) {
String sig = signature.toString();
// trim return type
final int index = sig.indexOf(" ");
if (index > 0) {
sig = sig.substring(index + 1);
}
if (name.isEmpty()) {
return MetricRegistry.name(sig, suffix);
}
if (!absolute) {
return MetricRegistry.name(sig, name);
}
return name;
}
@Around("execution(@com.codahale.metrics.annotation.Timed * *(..))")
public Object injectTimer(final ProceedingJoinPoint point)
throws Throwable {
final Signature signature = point.getSignature();
final Annotation annotation = getAnnotation(signature, Timed.class);
final Timed timed = Timed.class.cast(annotation);
final String name = name(signature, timed.name(), "timer", timed.absolute());
final Timer timer = registry.timer(name);
final Timer.Context context = timer.time();
try {
return point.proceed(point.getArgs());
} finally {
context.stop();
}
}
public static void displayMetrics() {
ConsoleReporter.forRegistry(registry)
.build()
.report();
CsvReporter.forRegistry(registry)
.build(new File("target/"))
.report();
}
}