/*
 * Copyright DataStax, Inc.
 *
 * 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 com.datastax.oss.driver.api.core.metrics;

import com.datastax.oss.driver.api.core.session.Session;
import edu.umd.cs.findbugs.annotations.NonNull;

/**
 * A node-level metric exposed through {@link Session#getMetrics()}.
 *
 * <p>All metrics exposed out of the box by the driver are instances of {@link DefaultNodeMetric} or
 * {@link com.datastax.dse.driver.api.core.metrics.DseNodeMetric DseNodeMetric} (this interface only
 * exists to allow custom metrics in driver extensions).
 *
 * @see SessionMetric
 */
public interface NodeMetric {

  @NonNull
  String getPath();
}
