98 lines
4.2 KiB
Java
98 lines
4.2 KiB
Java
/**
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* Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
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*/
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package docs.io;
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import akka.actor.ActorRef;
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import akka.actor.ActorSystem;
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import akka.actor.Props;
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import akka.io.Udp;
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import akka.testkit.JavaTestKit;
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import docs.AbstractJavaTest;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import java.net.Inet6Address;
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import java.net.InetAddress;
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import java.net.NetworkInterface;
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import java.util.*;
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public class JavaUdpMulticastTest extends AbstractJavaTest {
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static ActorSystem system;
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@BeforeClass
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public static void setup() {
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system = ActorSystem.create("JavaUdpMulticastTest");
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}
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@Test
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public void testUdpMulticast() throws Exception {
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new JavaTestKit(system) {{
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List<NetworkInterface> ipv6Ifaces = new ArrayList<>();
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for (Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); interfaces.hasMoreElements(); ) {
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NetworkInterface interf = interfaces.nextElement();
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if (interf.isUp() && interf.supportsMulticast()) {
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for (Enumeration<InetAddress> addresses = interf.getInetAddresses(); addresses.hasMoreElements(); ) {
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InetAddress address = addresses.nextElement();
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if (address instanceof Inet6Address) {
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ipv6Ifaces.add(interf);
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}
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}
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}
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}
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if (ipv6Ifaces.isEmpty()) {
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system.log().info("JavaUdpMulticastTest skipped since no ipv6 interface supporting multicast could be found");
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} else {
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// lots of problems with choosing the wrong interface for this test depending
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// on the platform (awsdl0 can't be used on OSX, docker[0-9] can't be used in a docker machine etc.)
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// therefore: try hard to find an interface that _does_ work, and only fail if there was any potentially
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// working interfaces but all failed
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for (Iterator<NetworkInterface> interfaceIterator = ipv6Ifaces.iterator(); interfaceIterator.hasNext(); ) {
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NetworkInterface ipv6Iface = interfaceIterator.next();
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// host assigned link local multicast address http://tools.ietf.org/html/rfc3307#section-4.3.2
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// generate a random 32 bit multicast address with the high order bit set
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final String randomAddress = Long.toHexString(((long) Math.abs(new Random().nextInt())) | (1L << 31)).toUpperCase();
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final StringBuilder groupBuilder = new StringBuilder("FF02:");
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for (int i = 0; i < 2; i += 1) {
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groupBuilder.append(":");
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groupBuilder.append(randomAddress.subSequence(i * 4, i * 4 + 4));
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}
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final String group = groupBuilder.toString();
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final Integer port = TestUtils.temporaryUdpIpv6Port(ipv6Iface);
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final String msg = "ohi";
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final ActorRef sink = getRef();
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final String iface = ipv6Iface.getName();
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final ActorRef listener = system.actorOf(Props.create(JavaUdpMulticast.Listener.class, iface, group, port, sink));
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try {
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expectMsgClass(Udp.Bound.class);
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final ActorRef sender = system.actorOf(Props.create(JavaUdpMulticast.Sender.class, iface, group, port, msg));
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expectMsgEquals(msg);
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// success with one interface is enough
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break;
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} catch (AssertionError ex) {
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if (!interfaceIterator.hasNext()) throw ex;
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else {
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system.log().info("Failed to run test on interface {}", ipv6Iface.getDisplayName());
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}
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} finally {
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// unbind
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system.stop(listener);
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}
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}
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}
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}};
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}
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@AfterClass
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public static void tearDown() {
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JavaTestKit.shutdownActorSystem(system);
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system = null;
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}
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}
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