| /* |
| * |
| * 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.qpid.server.stats; |
| |
| import java.time.Duration; |
| import java.time.Instant; |
| import java.util.Date; |
| import java.util.Map; |
| |
| import org.apache.qpid.server.model.ConfiguredObject; |
| import org.apache.qpid.server.util.Strings.Resolver; |
| |
| public class FormattingStatisticsResolver implements Resolver |
| { |
| private final Map<String, Object> _statistics; |
| static final String BYTEUNIT = "byteunit"; |
| static final String DURATION = "duration"; |
| static final String DATETIME = "datetime"; |
| |
| FormattingStatisticsResolver(final ConfiguredObject<?> object) |
| { |
| _statistics = object.getStatistics(); |
| } |
| |
| @Override |
| public String resolve(String statNameWithFormatSpecifier, final Resolver unused) |
| { |
| String[] split = statNameWithFormatSpecifier.split(":", 2); |
| String statName = split[0]; |
| |
| Object statisticValue = _statistics.get(statName); |
| |
| if (split.length > 1) |
| { |
| String formatterName = split[1].toLowerCase(); |
| if (statisticValue instanceof Number) |
| { |
| final long value = ((Number) statisticValue).longValue(); |
| switch (formatterName.toLowerCase()) |
| { |
| case BYTEUNIT: |
| statisticValue = toIEC80000BinaryPrefixedValue(value); |
| break; |
| case DURATION: |
| statisticValue = value < 0 ? "-" : Duration.ofMillis(value); |
| break; |
| case DATETIME: |
| statisticValue = value < 0 ? "-" : Instant.ofEpochMilli(value).toString(); |
| break; |
| } |
| } |
| else if (statisticValue instanceof Date) |
| { |
| switch (formatterName.toLowerCase()) |
| { |
| case DATETIME: |
| long time = ((Date) statisticValue).getTime(); |
| statisticValue = time < 0 ? "-" : Instant.ofEpochMilli(time).toString(); |
| break; |
| } |
| |
| } |
| } |
| |
| return statisticValue == null ? null : String.valueOf(statisticValue); |
| } |
| |
| private static String toIEC80000BinaryPrefixedValue(long value) |
| { |
| if (value > -1023 && value < 1024) |
| { |
| return value + " B"; |
| } |
| int exp = (int) (Math.log(Math.abs(value)) / Math.log(1024)); |
| char binaryPrefixInitialChar = "KMGTPEZY".charAt(exp - 1); |
| return String.format("%.1f %siB", value / Math.pow(1024, exp), binaryPrefixInitialChar); |
| } |
| } |