/* * 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.zeppelin.interpreter.remote; import java.io.IOException; import java.net.InetSocketAddress; import java.net.ServerSocket; import java.net.Socket; /** * */ public class RemoteInterpreterUtils { public static int findRandomAvailablePortOnAllLocalInterfaces() throws IOException { int port; try (ServerSocket socket = new ServerSocket(0);) { port = socket.getLocalPort(); socket.close(); } return port; } public static boolean checkIfRemoteEndpointAccessible(String host, int port) { try { Socket discover = new Socket(); discover.setSoTimeout(1000); discover.connect(new InetSocketAddress(host, port), 1000); discover.close(); return true; } catch (IOException e) { return false; } } }