Examples with FakeDNSServer io.vertx.test.fakedns.FakeDNSServer used on opensource projects

Example 6 with FakeDNSServer

use of io.vertx.test.fakedns.FakeDNSServer in project vert.x by eclipse.

the class HostnameResolutionTest method testServerFailover.

@Test
public void testServerFailover() throws Exception {
    FakeDNSServer server = new FakeDNSServer(FakeDNSServer.A_store(Collections.singletonMap("vertx.io", "127.0.0.1"))).port(FakeDNSServer.PORT + 2);
    try {
        AddressResolverOptions options = new AddressResolverOptions();
        options.setOptResourceEnabled(false);
        // 2 + 2
        options.setMaxQueries(4);
        server.start();
        InetSocketAddress dnsServerAddress = server.localAddress();
        // First server is unreachable
        options.addServer(dnsServerAddress.getAddress().getHostAddress() + ":" + (FakeDNSServer.PORT + 1));
        // Second server is the failed over server
        options.addServer(dnsServerAddress.getAddress().getHostAddress() + ":" + dnsServerAddress.getPort());
        AddressResolver resolver = new AddressResolver((VertxImpl) vertx, options);
        CompletableFuture<InetAddress> result = new CompletableFuture<>();
        resolver.resolveHostname("vertx.io", ar -> {
            if (ar.succeeded()) {
                result.complete(ar.result());
            } else {
                result.completeExceptionally(ar.cause());
            }
        });
        String resolved = result.get(10, TimeUnit.SECONDS).getHostAddress();
        assertEquals("127.0.0.1", resolved);
    } finally {
        server.stop();
    }
}