
nl.talsmasoftware.context.Timing Maven / Gradle / Ivy
/*
* Copyright 2016-2018 Talsma ICT
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package nl.talsmasoftware.context;
import nl.talsmasoftware.context.timing.ContextTimer;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Singleton initialized to lookup all {@link ContextTimer} delegates.
*
* @author Sjoerd Talsma
*/
final class Timing {
private static final Logger LOGGER = Logger.getLogger(Timing.class.getName());
/**
* Singleton containing resolved ContextTimer delegates.
*/
private enum Singleton {
INSTANCE;
private final ContextTimer[] delegates;
Singleton() {
List delegates = new ArrayList();
for (ContextTimer delegate : new PriorityServiceLoader(ContextTimer.class)) {
delegates.add(delegate);
}
this.delegates = delegates.toArray(new ContextTimer[0]);
}
}
static void timed(long durationNanos, Class> type, String method) {
for (ContextTimer delegate : Singleton.INSTANCE.delegates) {
delegate.update(type, method, durationNanos, TimeUnit.NANOSECONDS);
}
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "{0}.{1}: {2,number}ns", new Object[]{type.getName(), method, durationNanos});
}
}
}
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