| /* |
| * 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.slider.core.zk; |
| |
| import com.google.common.net.HostAndPort; |
| import org.apache.hadoop.util.StringUtils; |
| import org.apache.slider.common.tools.SliderUtils; |
| import org.apache.slider.core.exceptions.BadConfigException; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class ZookeeperUtils { |
| |
| public static String buildConnectionString(String zkHosts, int port) { |
| String zkPort = Integer.toString(port); |
| //parse the hosts |
| String[] hostlist = zkHosts.split(",", 0); |
| String quorum = SliderUtils.join(hostlist, ":" + zkPort + ",", false); |
| return quorum; |
| } |
| |
| /** |
| * Take a quorum list and split it to (trimmed) pairs |
| * @param hostPortQuorumList list of form h1:port, h2:port2,... |
| * @return a possibly empty list of values between commas. They may not be |
| * valid hostname:port pairs |
| */ |
| public static List<String> splitToPairs(String hostPortQuorumList) { |
| // split an address hot |
| String[] strings = StringUtils.getStrings(hostPortQuorumList); |
| List<String> tuples = new ArrayList<>(strings.length); |
| for (String s : strings) { |
| tuples.add(s.trim()); |
| } |
| return tuples; |
| } |
| |
| /** |
| * Split a quorum list into a list of hostnames and ports |
| * @param hostPortQuorumList split to a list of hosts and ports |
| * @return a list of values |
| */ |
| public static List<HostAndPort> splitToHostsAndPorts(String hostPortQuorumList) { |
| // split an address hot |
| String[] strings = StringUtils.getStrings(hostPortQuorumList); |
| List<HostAndPort> list = new ArrayList<>(strings.length); |
| for (String s : strings) { |
| list.add(HostAndPort.fromString(s.trim())); |
| } |
| return list; |
| } |
| |
| /** |
| * Build up to a hosts only list |
| * @param hostAndPorts |
| * @return a list of the hosts only |
| */ |
| public static String buildHostsOnlyList(List<HostAndPort> hostAndPorts) { |
| StringBuilder sb = new StringBuilder(); |
| for (HostAndPort hostAndPort : hostAndPorts) { |
| sb.append(hostAndPort.getHostText()).append(","); |
| } |
| if (sb.length() > 0) { |
| sb.delete(sb.length() - 1, sb.length()); |
| } |
| return sb.toString(); |
| } |
| |
| public static String buildQuorumEntry(HostAndPort hostAndPort, |
| int defaultPort) { |
| String s = hostAndPort.toString(); |
| if (hostAndPort.hasPort()) { |
| return s; |
| } else { |
| return s + ":" + defaultPort; |
| } |
| } |
| |
| /** |
| * Build a quorum list, injecting a ":defaultPort" ref if needed on |
| * any entry without one |
| * @param hostAndPorts |
| * @param defaultPort |
| * @return |
| */ |
| public static String buildQuorum(List<HostAndPort> hostAndPorts, int defaultPort) { |
| List<String> entries = new ArrayList<>(hostAndPorts.size()); |
| for (HostAndPort hostAndPort : hostAndPorts) { |
| entries.add(buildQuorumEntry(hostAndPort, defaultPort)); |
| } |
| return SliderUtils.join(entries, ",", false); |
| } |
| |
| public static String convertToHostsOnlyList(String quorum) throws |
| BadConfigException { |
| List<HostAndPort> hostAndPorts = splitToHostsAndPortsStrictly(quorum); |
| return ZookeeperUtils.buildHostsOnlyList(hostAndPorts); |
| } |
| |
| public static List<HostAndPort> splitToHostsAndPortsStrictly(String quorum) throws |
| BadConfigException { |
| List<HostAndPort> hostAndPorts = |
| ZookeeperUtils.splitToHostsAndPorts(quorum); |
| if (hostAndPorts.isEmpty()) { |
| throw new BadConfigException("empty zookeeper quorum"); |
| } |
| return hostAndPorts; |
| } |
| |
| public static int getFirstPort(String quorum, int defVal) throws |
| BadConfigException { |
| List<HostAndPort> hostAndPorts = splitToHostsAndPortsStrictly(quorum); |
| int port = hostAndPorts.get(0).getPortOrDefault(defVal); |
| return port; |
| |
| } |
| } |