content: /*
   * 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.cassandra.sidecar.metrics;
  
  import com.codahale.metrics.MetricRegistry;
  import org.apache.cassandra.sidecar.exceptions.CassandraUnavailableException;
  import org.apache.cassandra.sidecar.exceptions.NoSuchCassandraInstanceException;
  import org.apache.cassandra.sidecar.metrics.instance.InstanceMetrics;
  import org.apache.cassandra.sidecar.metrics.server.ServerMetrics;
  import org.apache.cassandra.sidecar.metrics.server.ServerMetricsImpl;
  import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher;
  import org.jetbrains.annotations.NotNull;
  
  /**
   * Tracks both server metrics and Cassandra instance specific metrics that Sidecar maintains.
   */
  public class SidecarMetricsImpl implements SidecarMetrics
  {
      protected final MetricRegistryFactory registryFactory;
      protected final InstanceMetadataFetcher instanceMetadataFetcher;
      protected final ServerMetrics serverMetrics;
  
      public SidecarMetricsImpl(MetricRegistryFactory registryFactory, InstanceMetadataFetcher instanceMetadataFetcher)
      {
          this.registryFactory = registryFactory;
          this.instanceMetadataFetcher = instanceMetadataFetcher;
  
          MetricRegistry globalMetricRegistry = registryFactory.getOrCreate();
          this.serverMetrics = new ServerMetricsImpl(globalMetricRegistry);
      }
  
      @Override
      public ServerMetrics server()
      {
          return serverMetrics;
      }
  
      @Override
      public InstanceMetrics instance(int instanceId)
      {
          return instanceMetadataFetcher.instance(instanceId).metrics();
      }
  
      @Override
      public InstanceMetrics instance(@NotNull String host) throws NoSuchCassandraInstanceException, CassandraUnavailableException
      {
          return instanceMetadataFetcher.instance(host).metrics();
      }
  }
  