| /* |
| * 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.ignite.internal.processors.metric.impl; |
| |
| import java.util.concurrent.atomic.AtomicLongArray; |
| import org.apache.ignite.internal.processors.metric.AbstractMetric; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.spi.metric.HistogramMetric; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Histogram metric implementation. |
| */ |
| public class HistogramMetricImpl extends AbstractMetric implements HistogramMetric { |
| /** Holder of measurements. */ |
| private volatile HistogramHolder holder; |
| |
| /** |
| * @param name Name. |
| * @param desc Description. |
| * @param bounds Bounds. |
| */ |
| public HistogramMetricImpl(String name, @Nullable String desc, long[] bounds) { |
| super(name, desc); |
| |
| holder = new HistogramHolder(bounds); |
| } |
| |
| /** |
| * Sets value. |
| * |
| * @param x Value. |
| */ |
| public void value(long x) { |
| assert x >= 0; |
| |
| HistogramHolder h = holder; |
| |
| //Expect arrays of few elements. |
| for (int i = 0; i < h.bounds.length; i++) { |
| if (x <= h.bounds[i]) { |
| h.measurements.incrementAndGet(i); |
| |
| return; |
| } |
| } |
| |
| h.measurements.incrementAndGet(h.bounds.length); |
| } |
| |
| /** |
| * Resets histogram state with the specified bounds. |
| * |
| * @param bounds Bounds. |
| */ |
| public void reset(long[] bounds) { |
| holder = new HistogramHolder(bounds); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void reset() { |
| reset(holder.bounds); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public long[] value() { |
| HistogramHolder h = holder; |
| |
| long[] res = new long[h.measurements.length()]; |
| |
| for (int i = 0; i < h.measurements.length(); i++) |
| res[i] = h.measurements.get(i); |
| |
| return res; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public long[] bounds() { |
| return holder.bounds; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Class<long[]> type() { |
| return long[].class; |
| } |
| |
| /** Histogram holder. */ |
| private static class HistogramHolder { |
| /** Count of measurement for each bound. */ |
| public final AtomicLongArray measurements; |
| |
| /** Bounds of measurements. */ |
| public final long[] bounds; |
| |
| /** |
| * @param bounds Bounds of measurements. |
| */ |
| public HistogramHolder(long[] bounds) { |
| assert !F.isEmpty(bounds) && F.isSorted(bounds); |
| |
| this.bounds = bounds; |
| |
| this.measurements = new AtomicLongArray(bounds.length + 1); |
| } |
| } |
| } |