| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.geronimo.microprofile.metrics.common; |
| |
| import org.eclipse.microprofile.metrics.SimpleTimer; |
| |
| import java.time.Clock; |
| import java.time.Duration; |
| import java.time.Instant; |
| import java.time.ZoneId; |
| import java.util.concurrent.Callable; |
| |
| public class SimpleTimerImpl implements SimpleTimer { |
| private static final Clock MINUTE_CLOCK = Clock.tickMinutes(ZoneId.of("UTC")); |
| private static final Clock CLOCK = Clock.systemUTC(); |
| |
| // same logic than ConcurrentGaugeImpl |
| private volatile Instant currentMinute = CLOCK.instant(); |
| |
| private volatile Duration current; |
| private volatile Duration min; |
| private volatile Duration max; |
| private volatile Duration previousMin; |
| private volatile Duration previousMax; |
| private volatile long count; |
| |
| private final String unit; |
| |
| public SimpleTimerImpl(final String unit) { |
| this.unit = unit; |
| } |
| |
| public String getUnit() { |
| return unit; |
| } |
| |
| @Override |
| public void update(final Duration duration) { |
| if (duration.isNegative() || duration.isZero()) { |
| return; |
| } |
| maybeRotate(); |
| synchronized (this) { |
| count++; |
| current = duration; |
| if (max == null || duration.toMillis() > max.toMillis()) { |
| max = duration; |
| } |
| if (min == null || duration.toMillis() < min.toMillis()) { |
| min = duration; |
| } |
| } |
| } |
| |
| @Override |
| public <T> T time(final Callable<T> callable) throws Exception { |
| final Instant startTime = CLOCK.instant(); |
| try { |
| return callable.call(); |
| } finally { |
| update(Duration.between(startTime, CLOCK.instant())); |
| } |
| } |
| |
| @Override |
| public void time(final Runnable runnable) { |
| try { |
| time(() -> { |
| runnable.run(); |
| return null; |
| }); |
| } catch (final RuntimeException re) { |
| throw re; |
| } catch (Exception e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| @Override |
| public Context time() { |
| return new ContextImpl(); |
| } |
| |
| @Override |
| public Duration getElapsedTime() { |
| return current; |
| } |
| |
| @Override |
| public long getCount() { |
| return count; |
| } |
| |
| @Override |
| public Duration getMaxTimeDuration() { |
| maybeRotate(); |
| return max; |
| } |
| |
| @Override |
| public Duration getMinTimeDuration() { |
| maybeRotate(); |
| return min; |
| } |
| |
| private void maybeRotate() { |
| final Instant now = MINUTE_CLOCK.instant(); |
| if (now.isAfter(currentMinute)) { |
| synchronized (this) { |
| if (now.isAfter(currentMinute)) { |
| rotate(now); |
| } |
| } |
| } |
| } |
| |
| private void rotate(final Instant now) { |
| previousMax = max; |
| previousMin = min; |
| max = min = null; |
| currentMinute = now; |
| } |
| |
| private class ContextImpl implements Context { |
| private final Instant start = CLOCK.instant(); |
| |
| @Override |
| public long stop() { |
| final Duration duration = Duration.between(start, CLOCK.instant()); |
| update(duration); |
| return duration.toNanos(); |
| } |
| |
| @Override |
| public void close() { |
| stop(); |
| } |
| } |
| } |