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doc,io #16262 UDP multicast tests work on all platforms (#20290)

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Johan Andrén 2016-04-13 13:30:04 +02:00 • committed by Konrad Malawski
parent f3ac18a362
commit 55e08682c5
2 changed files with 90 additions and 61 deletions
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83
akka-docs/rst/java/code/docs/io/JavaUdpMulticastTest.java
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@ -17,13 +17,10 @@ import org.junit.Test;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import java.util.Random;
import java.util.*;
// not part of the test suite because we have not figured out
// a way to find an interface that is sure to work on all platforms
// to listen for udp on
public class JavaUdpMulticastTest {
public class JavaUdpMulticastTest extends AbstractJavaTest {
static ActorSystem system;
@ -35,43 +32,61 @@ public class JavaUdpMulticastTest {
@Test
public void testUdpMulticast() throws Exception {
new JavaTestKit(system) {{
NetworkInterface ipv6Iface = null;
for (Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); interfaces.hasMoreElements() && ipv6Iface == null;) {
List<NetworkInterface> ipv6Ifaces = new ArrayList<>();
for (Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); interfaces.hasMoreElements(); ) {
NetworkInterface interf = interfaces.nextElement();
// awdl0 is a special interface on OSX that we cannot use
if (!interf.getDisplayName().equals("awdl0") &&
// we do not want to use virtual docker interfaces
!interf.getDisplayName().contains("docker")) {
for (Enumeration<InetAddress> addresses = interf.getInetAddresses(); addresses.hasMoreElements() && ipv6Iface == null; ) {
if (interf.isUp() && interf.supportsMulticast()) {
for (Enumeration<InetAddress> addresses = interf.getInetAddresses(); addresses.hasMoreElements(); ) {
InetAddress address = addresses.nextElement();
if (address instanceof Inet6Address) {
ipv6Iface = interf;
ipv6Ifaces.add(interf);
}
}
}
}
if (ipv6Ifaces.isEmpty()) {
system.log().info("JavaUdpMulticastTest skipped since no ipv6 interface supporting multicast could be found");
} else {
// lots of problems with choosing the wrong interface for this test depending
// on the platform (awsdl0 can't be used on OSX, docker[0-9] can't be used in a docker machine etc.)
// therefore: try hard to find an interface that _does_ work, and only fail if there was any potentially
// working interfaces but all failed
for (Iterator<NetworkInterface> interfaceIterator = ipv6Ifaces.iterator(); interfaceIterator.hasNext(); ) {
NetworkInterface ipv6Iface = interfaceIterator.next();
// host assigned link local multicast address http://tools.ietf.org/html/rfc3307#section-4.3.2
// generate a random 32 bit multicast address with the high order bit set
final String randomAddress = Long.toHexString(((long) Math.abs(new Random().nextInt())) | (1L << 31)).toUpperCase();
final StringBuilder groupBuilder = new StringBuilder("FF02:");
for (int i = 0; i < 2; i += 1) {
groupBuilder.append(":");
groupBuilder.append(randomAddress.subSequence(i * 4, i * 4 + 4));
}
final String group = groupBuilder.toString();
final Integer port = TestUtils.temporaryUdpIpv6Port(ipv6Iface);
final String msg = "ohi";
final ActorRef sink = getRef();
final String iface = ipv6Iface.getName();
// host assigned link local multicast address http://tools.ietf.org/html/rfc3307#section-4.3.2
// generate a random 32 bit multicast address with the high order bit set
final String randomAddress = Long.toHexString(((long) Math.abs(new Random().nextInt())) | (1L << 31)).toUpperCase();
final StringBuilder groupBuilder = new StringBuilder("FF02:");
for (int i = 0; i < 2; i += 1) {
groupBuilder.append(":");
groupBuilder.append(randomAddress.subSequence(i * 4, i * 4 + 4));
final ActorRef listener = system.actorOf(Props.create(JavaUdpMulticast.Listener.class, iface, group, port, sink));
try {
expectMsgClass(Udp.Bound.class);
final ActorRef sender = system.actorOf(Props.create(JavaUdpMulticast.Sender.class, iface, group, port, msg));
expectMsgEquals(msg);
// success with one interface is enough
break;
} catch (AssertionError ex) {
if (!interfaceIterator.hasNext()) throw ex;
else {
system.log().info("Failed to run test on interface {}", ipv6Iface.getDisplayName());
}
} finally {
// unbind
system.stop(listener);
}
}
}
final String group = groupBuilder.toString();
final Integer port = TestUtils.temporaryUdpIpv6Port(ipv6Iface);
final String msg = "ohi";
final ActorRef sink = getRef();
final String iface = ipv6Iface.getName();
final ActorRef listener = system.actorOf(Props.create(JavaUdpMulticast.Listener.class, iface, group, port, sink));
expectMsgClass(Udp.Bound.class);
final ActorRef sender = system.actorOf(Props.create(JavaUdpMulticast.Sender.class, iface, group, port, msg));
expectMsgEquals(msg);
// unbind
system.stop(listener);
}};
}