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 com.datastax.oss.driver.internal.core.metrics;
  
  import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
  import com.datastax.oss.driver.api.core.context.DriverContext;
  import com.datastax.oss.driver.api.core.metadata.Node;
  import com.datastax.oss.driver.api.core.metrics.NodeMetric;
  import com.datastax.oss.driver.api.core.metrics.SessionMetric;
  import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableMap;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.Objects;
  
  /**
   * The default {@link MetricIdGenerator}.
   *
   * <p>This generator generates unique names, containing the session name, the node endpoint (for
   * node metrics), and the metric prefix. It does not generate tags.
   */
  public class DefaultMetricIdGenerator implements MetricIdGenerator {
  
    private final String sessionPrefix;
    private final String nodePrefix;
  
    @SuppressWarnings("unused")
    public DefaultMetricIdGenerator(DriverContext context) {
      String sessionName = context.getSessionName();
      String prefix =
          Objects.requireNonNull(
              context
                  .getConfig()
                  .getDefaultProfile()
                  .getString(DefaultDriverOption.METRICS_ID_GENERATOR_PREFIX, ""));
      sessionPrefix = prefix.isEmpty() ? sessionName + '.' : prefix + '.' + sessionName + '.';
      nodePrefix = sessionPrefix + "nodes.";
    }
  
    @NonNull
    @Override
    public MetricId sessionMetricId(@NonNull SessionMetric metric) {
      return new DefaultMetricId(sessionPrefix + metric.getPath(), ImmutableMap.of());
    }
  
    @NonNull
    @Override
    public MetricId nodeMetricId(@NonNull Node node, @NonNull NodeMetric metric) {
      return new DefaultMetricId(
          nodePrefix + node.getEndPoint().asMetricPrefix() + '.' + metric.getPath(),
          ImmutableMap.of());
    }
  }
  