| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.atlas.metrics; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class Metrics { |
| private static final Logger METRICS = LoggerFactory.getLogger("METRICS"); |
| |
| private final Map<String, Metric> metrics = new LinkedHashMap<>(); |
| |
| |
| public MetricRecorder getMetricRecorder(String name) { |
| return METRICS.isDebugEnabled() ? new MetricRecorder(name) : null; |
| } |
| |
| public void recordMetric(MetricRecorder recorder) { |
| if (recorder != null) { |
| final String name = recorder.name; |
| final long timeTaken = recorder.getElapsedTime(); |
| |
| Metric metric = metrics.get(name); |
| |
| if (metric == null) { |
| metric = new Metric(name); |
| |
| metrics.put(name, metric); |
| } |
| |
| metric.invocations++; |
| metric.totalTimeMSecs += timeTaken; |
| } |
| } |
| |
| public void clear() { |
| metrics.clear(); |
| } |
| |
| public boolean isEmpty() { |
| return metrics.isEmpty(); |
| } |
| |
| public Set<String> getMetricsNames() { |
| return metrics.keySet(); |
| } |
| |
| public Metric getMetric(String name) { |
| return metrics.get(name); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append("{"); |
| |
| if (!metrics.isEmpty()) { |
| for (Metric metric : metrics.values()) { |
| sb.append("\"").append(metric.getName()).append("\":{\"count\":").append(metric.getInvocations()).append(",\"timeTaken\":").append(metric.getTotalTimeMSecs()).append("},"); |
| } |
| |
| sb.setLength(sb.length() - 1); // remove last "," |
| } |
| |
| sb.append("}"); |
| |
| return sb.toString(); |
| } |
| |
| public class MetricRecorder { |
| private final String name; |
| private final long startTimeMs = System.currentTimeMillis(); |
| |
| MetricRecorder(String name) { |
| this.name = name; |
| } |
| |
| long getElapsedTime() { |
| return System.currentTimeMillis() - startTimeMs; |
| } |
| } |
| |
| public static class Metric { |
| private final String name; |
| private short invocations = 0; |
| private long totalTimeMSecs = 0; |
| |
| public Metric(String name) { |
| this.name = name; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public short getInvocations() { |
| return invocations; |
| } |
| |
| public long getTotalTimeMSecs() { |
| return totalTimeMSecs; |
| } |
| } |
| } |