https://github.com/datastax/java-driver/java-driver-core: A driver for Apache Cassandra(R) 2.1+ that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's native protocol versions 3 and above.
  • Various (DataStax) 
/*
 * 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 session-level metric exposed through Session.getMetrics(). 
All metrics exposed out of the box by the driver are instances of DefaultSessionMetric (this interface only exists to allow custom metrics in driver extensions). 
See Also:
/**
 * A session-level metric exposed through {@link Session#getMetrics()}.
 *
 * <p>All metrics exposed out of the box by the driver are instances of {@link DefaultSessionMetric}
 * (this interface only exists to allow custom metrics in driver extensions).
 *
 * @see NodeMetric
 */
public interface SessionMetric {

  @NonNull
  String getPath();
}