| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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 org.onosproject.codec.impl; |
| |
| import com.codahale.metrics.Counter; |
| import com.codahale.metrics.Gauge; |
| import com.codahale.metrics.Meter; |
| import com.codahale.metrics.Metric; |
| import com.codahale.metrics.Histogram; |
| import com.codahale.metrics.Timer; |
| |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.onosproject.codec.CodecContext; |
| import org.onosproject.codec.JsonCodec; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Codec for the Metric class. |
| */ |
| public class MetricCodec extends JsonCodec<Metric> { |
| |
| // JSON field names |
| private static final String COUNTER = "counter"; |
| |
| private static final String GAUGE = "gauge"; |
| private static final String VALUE = "value"; |
| |
| private static final String METER = "meter"; |
| private static final String MEAN_RATE = "mean_rate"; |
| private static final String ONE_MIN_RATE = "1_min_rate"; |
| private static final String FIVE_MIN_RATE = "5_min_rate"; |
| private static final String FIFT_MIN_RATE = "15_min_rate"; |
| |
| private static final String HISTOGRAM = "histogram"; |
| private static final String MIN = "min"; |
| private static final String MAX = "max"; |
| private static final String MEAN = "mean"; |
| private static final String STDDEV = "stddev"; |
| |
| private static final String TIMER = "timer"; |
| |
| @Override |
| public ObjectNode encode(Metric metric, CodecContext context) { |
| checkNotNull(metric, "Metric cannot be null"); |
| |
| ObjectNode objectNode = context.mapper().createObjectNode(); |
| ObjectNode dataNode = context.mapper().createObjectNode(); |
| |
| if (metric instanceof Counter) { |
| dataNode.put(COUNTER, ((Counter) metric).getCount()); |
| objectNode.set(COUNTER, dataNode); |
| } else if (metric instanceof Gauge) { |
| objectNode.put(VALUE, ((Gauge) metric).getValue().toString()); |
| objectNode.set(GAUGE, dataNode); |
| } else if (metric instanceof Meter) { |
| dataNode.put(COUNTER, ((Meter) metric).getCount()); |
| dataNode.put(MEAN_RATE, ((Meter) metric).getMeanRate()); |
| dataNode.put(ONE_MIN_RATE, ((Meter) metric).getOneMinuteRate()); |
| dataNode.put(FIVE_MIN_RATE, ((Meter) metric).getFiveMinuteRate()); |
| dataNode.put(FIFT_MIN_RATE, ((Meter) metric).getFifteenMinuteRate()); |
| objectNode.set(METER, dataNode); |
| } else if (metric instanceof Histogram) { |
| dataNode.put(COUNTER, ((Histogram) metric).getCount()); |
| dataNode.put(MEAN, ((Histogram) metric).getSnapshot().getMean()); |
| dataNode.put(MIN, ((Histogram) metric).getSnapshot().getMin()); |
| dataNode.put(MAX, ((Histogram) metric).getSnapshot().getMax()); |
| dataNode.put(STDDEV, ((Histogram) metric).getSnapshot().getStdDev()); |
| objectNode.set(HISTOGRAM, dataNode); |
| } else if (metric instanceof Timer) { |
| dataNode.put(COUNTER, ((Timer) metric).getCount()); |
| dataNode.put(MEAN_RATE, ((Timer) metric).getMeanRate()); |
| dataNode.put(ONE_MIN_RATE, ((Timer) metric).getOneMinuteRate()); |
| dataNode.put(FIVE_MIN_RATE, ((Timer) metric).getFiveMinuteRate()); |
| dataNode.put(FIFT_MIN_RATE, ((Timer) metric).getFifteenMinuteRate()); |
| dataNode.put(MEAN, nanoToMs(((Timer) metric).getSnapshot().getMean())); |
| dataNode.put(MIN, nanoToMs(((Timer) metric).getSnapshot().getMin())); |
| dataNode.put(MAX, nanoToMs(((Timer) metric).getSnapshot().getMax())); |
| dataNode.put(STDDEV, nanoToMs(((Timer) metric).getSnapshot().getStdDev())); |
| objectNode.set(TIMER, dataNode); |
| } |
| return objectNode; |
| } |
| |
| private double nanoToMs(double nano) { |
| return TimeUnit.MILLISECONDS.convert((long) nano, TimeUnit.NANOSECONDS); |
| } |
| } |