| /** |
| * 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.kafka.common; |
| |
| /** |
| * Information about a Kafka node |
| */ |
| public class Node { |
| |
| private static final Node NO_NODE = new Node(-1, "", -1); |
| |
| private final int id; |
| private final String idString; |
| private final String host; |
| private final int port; |
| private final String rack; |
| |
| public Node(int id, String host, int port) { |
| this(id, host, port, null); |
| } |
| |
| public Node(int id, String host, int port, String rack) { |
| super(); |
| this.id = id; |
| this.idString = Integer.toString(id); |
| this.host = host; |
| this.port = port; |
| this.rack = rack; |
| } |
| |
| public static Node noNode() { |
| return NO_NODE; |
| } |
| |
| /** |
| * Check whether this node is empty, which may be the case if noNode() is used as a placeholder |
| * in a response payload with an error. |
| * @return true if it is, false otherwise |
| */ |
| public boolean isEmpty() { |
| return host == null || host.isEmpty() || port < 0; |
| } |
| |
| /** |
| * The node id of this node |
| */ |
| public int id() { |
| return id; |
| } |
| |
| /** |
| * String representation of the node id. |
| * Typically the integer id is used to serialize over the wire, the string representation is used as an identifier with NetworkClient code |
| */ |
| public String idString() { |
| return idString; |
| } |
| |
| /** |
| * The host name for this node |
| */ |
| public String host() { |
| return host; |
| } |
| |
| /** |
| * The port for this node |
| */ |
| public int port() { |
| return port; |
| } |
| |
| /** |
| * True if this node has a defined rack |
| */ |
| public boolean hasRack() { |
| return rack != null; |
| } |
| |
| /** |
| * The rack for this node |
| */ |
| public String rack() { |
| return rack; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((host == null) ? 0 : host.hashCode()); |
| result = prime * result + id; |
| result = prime * result + port; |
| result = prime * result + ((rack == null) ? 0 : rack.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| Node other = (Node) obj; |
| if (host == null) { |
| if (other.host != null) |
| return false; |
| } else if (!host.equals(other.host)) |
| return false; |
| if (id != other.id) |
| return false; |
| if (port != other.port) |
| return false; |
| if (rack == null) { |
| if (other.rack != null) |
| return false; |
| } else if (!rack.equals(other.rack)) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return host + ":" + port + " (id: " + idString + " rack: " + rack + ")"; |
| } |
| |
| } |