| /* |
| * 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.solr.core; |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import org.apache.solr.metrics.SolrMetricManager; |
| import org.apache.solr.metrics.SolrMetricProducer; |
| import org.apache.solr.metrics.SolrMetricsContext; |
| import org.apache.solr.util.stats.MetricUtils; |
| |
| /** |
| * Interface for getting various ui friendly strings |
| * for use by objects which are 'pluggable' to make server administration |
| * easier. |
| */ |
| public interface SolrInfoBean { |
| |
| /** |
| * Category of Solr component. |
| */ |
| enum Category { CONTAINER, ADMIN, CORE, QUERY, UPDATE, CACHE, HIGHLIGHTER, QUERYPARSER, SPELLCHECKER, |
| SEARCHER, REPLICATION, TLOG, INDEX, DIRECTORY, HTTP, SECURITY, OTHER } |
| |
| /** |
| * Top-level group of beans or metrics for a subsystem. |
| */ |
| enum Group { jvm, jetty, node, core, collection, shard, cluster, overseer } |
| |
| /** |
| * Simple common usage name, e.g. BasicQueryHandler, |
| * or fully qualified class name. |
| */ |
| String getName(); |
| /** Simple one or two line description */ |
| String getDescription(); |
| /** Category of this component */ |
| Category getCategory(); |
| |
| /** Optionally return a snapshot of metrics that this component reports, or null. |
| * Default implementation requires that both {@link #getMetricNames()} and |
| * {@link #getMetricRegistry()} return non-null values. |
| */ |
| default Map<String, Object> getMetricsSnapshot() { |
| if (getMetricRegistry() == null || getMetricNames() == null) { |
| return null; |
| } |
| return MetricUtils.convertMetrics(getMetricRegistry(), getMetricNames()); |
| } |
| |
| /** |
| * Modifiable set of metric names that this component reports (default is null, |
| * which means none). If not null then this set is used by {@link #registerMetricName(String)} |
| * to capture what metrics names are reported from this component. |
| * <p><b>NOTE: this set has to allow iteration under modifications.</b></p> |
| */ |
| default Set<String> getMetricNames() { |
| return null; |
| } |
| |
| /** |
| * An instance of {@link MetricRegistry} that this component uses for metrics reporting |
| * (default is null, which means no registry). |
| */ |
| default MetricRegistry getMetricRegistry() { |
| if (this instanceof SolrMetricProducer) { |
| SolrMetricsContext context = ((SolrMetricProducer)this).getSolrMetricsContext(); |
| return context != null ? context.getMetricRegistry() : null; |
| } |
| return null; |
| } |
| |
| /** Register a metric name that this component reports. This method is called by various |
| * metric registration methods in {@link org.apache.solr.metrics.SolrMetricManager} in order |
| * to capture what metric names are reported from this component (which in turn is called |
| * from {@link org.apache.solr.metrics.SolrMetricProducer#initializeMetrics(SolrMetricManager, String, String, String)}). |
| * <p>Default implementation registers all metrics added by a component. Implementations may |
| * override this to avoid reporting some or all metrics returned by {@link #getMetricsSnapshot()}</p> |
| */ |
| default void registerMetricName(String name) { |
| Set<String> names = getMetricNames(); |
| if (names != null) { |
| names.add(name); |
| } |
| } |
| } |