1 /*
2 * Copyright 2010 The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package org.apache.hadoop.hbase.rest.client;
22
23 import java.util.ArrayList;
24 import java.util.Collections;
25 import java.util.List;
26
27 /**
28 * A list of 'host:port' addresses of HTTP servers operating as a single
29 * entity, for example multiple redundant web service gateways.
30 */
31 public class Cluster {
32 protected List<String> nodes =
33 Collections.synchronizedList(new ArrayList<String>());
34 protected String lastHost;
35
36 /**
37 * Constructor
38 */
39 public Cluster() {}
40
41 /**
42 * Constructor
43 * @param nodes a list of service locations, in 'host:port' format
44 */
45 public Cluster(List<String> nodes) {
46 nodes.addAll(nodes);
47 }
48
49 /**
50 * @return true if no locations have been added, false otherwise
51 */
52 public boolean isEmpty() {
53 return nodes.isEmpty();
54 }
55
56 /**
57 * Add a node to the cluster
58 * @param node the service location in 'host:port' format
59 */
60 public Cluster add(String node) {
61 nodes.add(node);
62 return this;
63 }
64
65 /**
66 * Add a node to the cluster
67 * @param name host name
68 * @param port service port
69 */
70 public Cluster add(String name, int port) {
71 StringBuilder sb = new StringBuilder();
72 sb.append(name);
73 sb.append(':');
74 sb.append(port);
75 return add(sb.toString());
76 }
77
78 /**
79 * Remove a node from the cluster
80 * @param node the service location in 'host:port' format
81 */
82 public Cluster remove(String node) {
83 nodes.remove(node);
84 return this;
85 }
86
87 /**
88 * Remove a node from the cluster
89 * @param name host name
90 * @param port service port
91 */
92 public Cluster remove(String name, int port) {
93 StringBuilder sb = new StringBuilder();
94 sb.append(name);
95 sb.append(':');
96 sb.append(port);
97 return remove(sb.toString());
98 }
99 }