| /* |
| * Copyright 2018, OpenCensus Authors |
| * |
| * 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 io.opencensus.metrics; |
| |
| import io.opencensus.common.ExperimentalApi; |
| import io.opencensus.common.ToDoubleFunction; |
| import io.opencensus.common.ToLongFunction; |
| import io.opencensus.internal.Utils; |
| import java.util.List; |
| |
| /** |
| * Creates and manages your application's set of metrics. The default implementation of this creates |
| * a {@link io.opencensus.metrics.export.MetricProducer} and registers it to the global {@link |
| * io.opencensus.metrics.export.MetricProducerManager}. |
| * |
| * @since 0.17 |
| */ |
| @ExperimentalApi |
| public abstract class MetricRegistry { |
| /** |
| * Builds a new long gauge to be added to the registry. This is more convenient form when you want |
| * to manually increase and decrease values as per your service requirements. |
| * |
| * @param name the name of the metric. |
| * @param description the description of the metric. |
| * @param unit the unit of the metric. |
| * @param labelKeys the list of the label keys. |
| * @throws NullPointerException if {@code labelKeys} is null OR any element of {@code labelKeys} |
| * is null OR {@code name}, {@code description}, {@code unit} is null. |
| * @throws IllegalArgumentException if different metric with the same name already registered. |
| * @since 0.17 |
| */ |
| @ExperimentalApi |
| public abstract LongGauge addLongGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys); |
| |
| /** |
| * Builds a new double gauge to be added to the registry. This is more convenient form when you |
| * want to manually increase and decrease values as per your service requirements. |
| * |
| * @param name the name of the metric. |
| * @param description the description of the metric. |
| * @param unit the unit of the metric. |
| * @param labelKeys the list of the label keys. |
| * @throws NullPointerException if {@code labelKeys} is null OR any element of {@code labelKeys} |
| * is null OR {@code name}, {@code description}, {@code unit} is null. |
| * @throws IllegalArgumentException if different metric with the same name already registered. |
| * @since 0.17 |
| */ |
| @ExperimentalApi |
| public abstract DoubleGauge addDoubleGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys); |
| |
| /** |
| * Builds a new derived long gauge to be added to the registry. This is more convenient form when |
| * you want to define a gauge by executing a {@link ToLongFunction} on an object. |
| * |
| * @param name the name of the metric. |
| * @param description the description of the metric. |
| * @param unit the unit of the metric. |
| * @param labelKeys the list of the label keys. |
| * @throws NullPointerException if {@code labelKeys} is null OR any element of {@code labelKeys} |
| * is null OR {@code name}, {@code description}, {@code unit} is null. |
| * @throws IllegalArgumentException if different metric with the same name already registered. |
| * @since 0.17 |
| */ |
| @ExperimentalApi |
| public abstract DerivedLongGauge addDerivedLongGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys); |
| |
| /** |
| * Builds a new derived double gauge to be added to the registry. This is more convenient form |
| * when you want to define a gauge by executing a {@link ToDoubleFunction} on an object. |
| * |
| * @param name the name of the metric. |
| * @param description the description of the metric. |
| * @param unit the unit of the metric. |
| * @param labelKeys the list of the label keys. |
| * @throws NullPointerException if {@code labelKeys} is null OR any element of {@code labelKeys} |
| * is null OR {@code name}, {@code description}, {@code unit} is null. |
| * @throws IllegalArgumentException if different metric with the same name already registered. |
| * @since 0.17 |
| */ |
| @ExperimentalApi |
| public abstract DerivedDoubleGauge addDerivedDoubleGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys); |
| |
| static MetricRegistry newNoopMetricRegistry() { |
| return new NoopMetricRegistry(); |
| } |
| |
| private static final class NoopMetricRegistry extends MetricRegistry { |
| |
| @Override |
| public LongGauge addLongGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys) { |
| Utils.checkListElementNotNull( |
| Utils.checkNotNull(labelKeys, "labelKeys"), "labelKey element should not be null."); |
| return LongGauge.newNoopLongGauge( |
| Utils.checkNotNull(name, "name"), |
| Utils.checkNotNull(description, "description"), |
| Utils.checkNotNull(unit, "unit"), |
| labelKeys); |
| } |
| |
| @Override |
| public DoubleGauge addDoubleGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys) { |
| Utils.checkListElementNotNull( |
| Utils.checkNotNull(labelKeys, "labelKeys"), "labelKey element should not be null."); |
| return DoubleGauge.newNoopDoubleGauge( |
| Utils.checkNotNull(name, "name"), |
| Utils.checkNotNull(description, "description"), |
| Utils.checkNotNull(unit, "unit"), |
| labelKeys); |
| } |
| |
| @Override |
| public DerivedLongGauge addDerivedLongGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys) { |
| Utils.checkListElementNotNull( |
| Utils.checkNotNull(labelKeys, "labelKeys"), "labelKey element should not be null."); |
| return DerivedLongGauge.newNoopDerivedLongGauge( |
| Utils.checkNotNull(name, "name"), |
| Utils.checkNotNull(description, "description"), |
| Utils.checkNotNull(unit, "unit"), |
| labelKeys); |
| } |
| |
| @Override |
| public DerivedDoubleGauge addDerivedDoubleGauge( |
| String name, String description, String unit, List<LabelKey> labelKeys) { |
| Utils.checkListElementNotNull( |
| Utils.checkNotNull(labelKeys, "labelKeys"), "labelKey element should not be null."); |
| return DerivedDoubleGauge.newNoopDerivedDoubleGauge( |
| Utils.checkNotNull(name, "name"), |
| Utils.checkNotNull(description, "description"), |
| Utils.checkNotNull(unit, "unit"), |
| labelKeys); |
| } |
| } |
| } |