hudi-common/src/main/java/org/apache/hudi/common/util/NetworkUtils.java

/*
 * 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.hudi.common.util;

import org.apache.hudi.exception.HoodieException;

import java.io.IOException;
import java.net.ServerSocket;

/**
 * A utility class for network.
 */
public class NetworkUtils {

  public static synchronized String getHostname() {
    ServerSocket s = null;
    try {
      s = new ServerSocket(0);
      return s.getInetAddress().getHostAddress();
    } catch (IOException e) {
      throw new HoodieException("Unable to find server port", e);
    } finally {
      if (null != s) {
        try {
          s.close();
        } catch (IOException e) {
          throw new HoodieException("Unable to close server port", e);
        }
      }
    }
  }
}