| // Copyright 2017 JanusGraph Authors |
| // |
| // Licensed 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.hugegraph.util; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.Socket; |
| |
| /* |
| * This doesn't really belong here. It's only used in the zipfile |
| * distribution to check whether Gremlin Server or ES are listening on |
| * their respective TCP ports. But it's so tiny that I don't want |
| * to reorganize the repo to accommodate it (yet). |
| * |
| * Many widely available *NIX programs do this task better (e.g. |
| * netcat, telnet, nmap, socat, ... we could even use netstat since |
| * we're interested only in the status of local ports). But we want |
| * to keep the JanusGraph distribution self-contained insofar as is |
| * reasonable. |
| */ |
| public final class CheckSocket { |
| |
| private static final int E_USAGE = 1; |
| private static final int E_FAILED = 2; |
| private static final String MSG_USAGE = |
| "Usage: " + CheckSocket.class.getSimpleName() + " hostname port"; |
| |
| public static void main(String[] args) { |
| if (args.length != 2) { |
| System.err.println(MSG_USAGE); |
| System.exit(E_USAGE); |
| } |
| try { |
| Socket s = new Socket(InetAddress.getByName(args[0]), |
| Integer.parseInt(args[1])); |
| s.close(); |
| System.exit(0); |
| } catch (IOException ignored) { |
| System.err.println(ignored.toString()); |
| System.exit(E_FAILED); |
| } |
| } |
| } |