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.api.core.metadata;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  
  /**
   * Encapsulates the information needed to open connections to a node.
   *
   * <p>By default, the driver assumes plain TCP connections, and this is just a wrapper around an
   * {@link InetSocketAddress}. However, more complex deployment scenarios might use a custom
   * implementation that contains additional information; for example, if the nodes are accessed
   * through a proxy with SNI routing, an SNI server name is needed in addition to the proxy address.
   */
  public interface EndPoint {
  
    /**
     * Resolves this instance to a socket address.
     *
     * <p>This will be called each time the driver opens a new connection to the node. The returned
     * address cannot be null.
     */
    @NonNull
    SocketAddress resolve();
  
    /**
     * Returns an alternate string representation for use in node-level metric names.
     *
     * <p>Because metrics names are path-like, dot-separated strings, raw IP addresses don't make very
     * good identifiers. So this method will typically replace the dots by another character, for
     * example {@code 127_0_0_1_9042}.
     */
    @NonNull
    String asMetricPrefix();
  }
  