| /* |
| * 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.samza.util; |
| |
| import java.net.Inet4Address; |
| import java.net.InetAddress; |
| import java.net.NetworkInterface; |
| import java.net.SocketException; |
| import java.net.UnknownHostException; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.stream.Collectors; |
| import com.google.common.collect.Lists; |
| import org.apache.samza.SamzaException; |
| import org.apache.samza.config.ApplicationConfig; |
| import org.apache.samza.config.Config; |
| import org.apache.samza.config.TaskConfig; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public class Util { |
| private static final Logger LOG = LoggerFactory.getLogger(Util.class); |
| |
| static final String FALLBACK_VERSION = "0.0.1"; |
| |
| /** |
| * Make an environment variable string safe to pass. |
| */ |
| public static String envVarEscape(String str) { |
| return str |
| .replace("\\", "\\\\") |
| .replace("\"", "\\\"") |
| .replace("`", "\\`"); |
| } |
| |
| public static String getSamzaVersion() { |
| return Optional.ofNullable(Util.class.getPackage().getImplementationVersion()).orElseGet(() -> { |
| LOG.warn("Unable to find implementation samza version in jar's meta info. Defaulting to {}", FALLBACK_VERSION); |
| return FALLBACK_VERSION; |
| }); |
| } |
| |
| public static String getTaskClassVersion(Config config) { |
| try { |
| Optional<String> appClass = Optional.ofNullable(new ApplicationConfig(config).getAppClass()); |
| if (appClass.isPresent()) { |
| return Optional.ofNullable(Class.forName(appClass.get()).getPackage().getImplementationVersion()) |
| .orElse(FALLBACK_VERSION); |
| } else { |
| Optional<String> taskClass = new TaskConfig(config).getTaskClass(); |
| if (taskClass.isPresent()) { |
| return Optional.ofNullable(Class.forName(taskClass.get()).getPackage().getImplementationVersion()) |
| .orElse(FALLBACK_VERSION); |
| } else { |
| LOG.warn("Unable to find app class or task class. Defaulting to {}", FALLBACK_VERSION); |
| return FALLBACK_VERSION; |
| } |
| } |
| } catch (Exception e) { |
| LOG.warn(String.format("Ran into exception while trying to get version of app or task. Defaulting to %s", |
| FALLBACK_VERSION), e); |
| return FALLBACK_VERSION; |
| } |
| } |
| |
| /** |
| * Returns the the first host address which is not the loopback address, or {@link InetAddress#getLocalHost} as a |
| * fallback. |
| * |
| * @return the {@link InetAddress} which represents the localhost |
| */ |
| public static InetAddress getLocalHost() { |
| try { |
| return doGetLocalHost(); |
| } catch (Exception e) { |
| throw new SamzaException("Error while getting localhost", e); |
| } |
| } |
| |
| private static InetAddress doGetLocalHost() throws UnknownHostException, SocketException { |
| InetAddress localHost = InetAddress.getLocalHost(); |
| if (localHost.isLoopbackAddress()) { |
| LOG.debug("Hostname {} resolves to a loopback address, trying to resolve an external IP address.", |
| localHost.getHostName()); |
| List<NetworkInterface> networkInterfaces; |
| if (System.getProperty("os.name").startsWith("Windows")) { |
| networkInterfaces = Collections.list(NetworkInterface.getNetworkInterfaces()); |
| } else { |
| networkInterfaces = Lists.reverse(Collections.list(NetworkInterface.getNetworkInterfaces())); |
| } |
| for (NetworkInterface networkInterface : networkInterfaces) { |
| List<InetAddress> addresses = Collections.list(networkInterface.getInetAddresses()) |
| .stream() |
| .filter(address -> !(address.isLinkLocalAddress() || address.isLoopbackAddress())) |
| .collect(Collectors.toList()); |
| if (!addresses.isEmpty()) { |
| InetAddress address = addresses.stream() |
| .filter(addr -> addr instanceof Inet4Address) |
| .findFirst() |
| .orElseGet(() -> addresses.get(0)); |
| LOG.debug("Found an external IP address {} which represents the localhost.", address.getHostAddress()); |
| return InetAddress.getByAddress(address.getAddress()); |
| } |
| } |
| } |
| return localHost; |
| } |
| } |