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/*
* SonarQube Integration Tests :: Tests
* Copyright (C) 2009-2016 SonarSource SA
* mailto:contact AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package util;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.concurrent.atomic.AtomicInteger;
public final class NetworkUtils {
private static final int MAX_TRY = 10;
private static final AtomicInteger nextPort = new AtomicInteger(20000);
private NetworkUtils() {
}
public static int getNextAvailablePort() {
if (isOnTravisCI()) {
for (int i = 0; i < MAX_TRY; i++) {
int port = nextPort.getAndIncrement();
// Check that the port is really available.
// (On Travis, if the build is single threaded, it should be)
//
try {
Process process = new ProcessBuilder("nc", "-z", "localhost", Integer.toString(port)).start();
if (process.waitFor() == 1) {
return port;
}
} catch (Exception e) {
throw new IllegalStateException("Can't test that a network port is available", e);
}
}
throw new IllegalStateException("Can't find a free network port");
}
try (ServerSocket socket = new ServerSocket()) {
socket.bind(new InetSocketAddress("localhost", 0));
return socket.getLocalPort();
} catch (IOException e) {
throw new IllegalStateException("Can't find a free network port", e);
}
}
private static boolean isOnTravisCI() {
return "true".equals(System.getenv("TRAVIS"));
}
}
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