io.netty.channel.local.LocalServerChannel Java Examples

@Test
public void testAsyncResolutionSuccess() throws Exception {
    final Bootstrap bootstrapA = new Bootstrap();
    bootstrapA.group(groupA);
    bootstrapA.channel(LocalChannel.class);
    bootstrapA.resolver(new TestAddressResolverGroup(true));
    bootstrapA.handler(dummyHandler);

    final ServerBootstrap bootstrapB = new ServerBootstrap();
    bootstrapB.group(groupB);
    bootstrapB.channel(LocalServerChannel.class);
    bootstrapB.childHandler(dummyHandler);
    SocketAddress localAddress = bootstrapB.bind(LocalAddress.ANY).sync().channel().localAddress();

    // Connect to the server using the asynchronous resolver.
    bootstrapA.connect(localAddress).sync();
}
 

@Test
public void testAsyncResolutionFailure() throws Exception {
    final Bootstrap bootstrapA = new Bootstrap();
    bootstrapA.group(groupA);
    bootstrapA.channel(LocalChannel.class);
    bootstrapA.resolver(new TestAddressResolverGroup(false));
    bootstrapA.handler(dummyHandler);

    final ServerBootstrap bootstrapB = new ServerBootstrap();
    bootstrapB.group(groupB);
    bootstrapB.channel(LocalServerChannel.class);
    bootstrapB.childHandler(dummyHandler);
    SocketAddress localAddress = bootstrapB.bind(LocalAddress.ANY).sync().channel().localAddress();

    // Connect to the server using the asynchronous resolver.
    ChannelFuture connectFuture = bootstrapA.connect(localAddress);

    // Should fail with the UnknownHostException.
    assertThat(connectFuture.await(10000), is(true));
    assertThat(connectFuture.cause(), is(instanceOf(UnknownHostException.class)));
    assertThat(connectFuture.channel().isOpen(), is(false));
}
 

public TestServer(
    EventLoopGroup eventLoopGroup,
    LocalAddress localAddress,
    ImmutableList<? extends ChannelHandler> handlers) {
  // Creates ChannelInitializer with handlers specified
  ChannelInitializer<LocalChannel> serverInitializer =
      new ChannelInitializer<LocalChannel>() {
        @Override
        protected void initChannel(LocalChannel ch) {
          for (ChannelHandler handler : handlers) {
            ch.pipeline().addLast(handler);
          }
        }
      };
  // Sets up serverBootstrap with specified initializer, eventLoopGroup, and using
  // LocalServerChannel class
  ServerBootstrap serverBootstrap =
      new ServerBootstrap()
          .group(eventLoopGroup)
          .channel(LocalServerChannel.class)
          .childHandler(serverInitializer);

  ChannelFuture unusedFuture = serverBootstrap.bind(localAddress).syncUninterruptibly();
}
 

/** Sets up a server channel bound to the given local address. */
public void setUpServer(LocalAddress localAddress, ChannelHandler... handlers) {
  checkState(echoHandler == null, "Can't call setUpServer twice");
  echoHandler = new EchoHandler();
  ChannelInitializer<LocalChannel> serverInitializer =
      new ChannelInitializer<LocalChannel>() {
        @Override
        protected void initChannel(LocalChannel ch) {
          // Add the given handler
          ch.pipeline().addLast(handlers);
          // Add the "echoHandler" last to log the incoming message and send it back
          ch.pipeline().addLast(echoHandler);
          serverChannel = ch;
        }
      };
  ServerBootstrap sb =
      new ServerBootstrap()
          .group(eventLoopGroup)
          .channel(LocalServerChannel.class)
          .childHandler(serverInitializer);
  ChannelFuture unusedFuture = sb.bind(localAddress).syncUninterruptibly();
}
 

@Test
public void assertEventLoopsAndChannelType_allProvided() {
  EventLoopGroup mockEventLoopGroup = mock(EventLoopGroup.class);

  builder.bossEventLoopGroup(mockEventLoopGroup);
  builder.workerEventLoopGroup(mockEventLoopGroup);
  builder.channelType(LocalServerChannel.class);

  builder.assertEventLoopsAndChannelType();
}
 

@Override
protected AbstractServerImplBuilder<?> getServerBuilder() {
  return NettyServerBuilder
      .forAddress(new LocalAddress("in-process-1"))
      .flowControlWindow(65 * 1024)
      .maxInboundMessageSize(AbstractInteropTest.MAX_MESSAGE_SIZE)
      .channelType(LocalServerChannel.class);
}
 

@Test
public void assertEventLoopsAndChannelType_onlyTypeProvided() {
  builder.channelType(LocalServerChannel.class);
  thrown.expect(IllegalStateException.class);
  thrown.expectMessage(
      "All of BossEventLoopGroup, WorkerEventLoopGroup and ChannelType should be provided");

  builder.assertEventLoopsAndChannelType();
}
 

@Test
public void waitUntilActiveHandler_channelActive() throws Exception {
  final CountDownLatch latch = new CountDownLatch(1);
  WaitUntilActiveHandler handler =
      new WaitUntilActiveHandler(new ChannelHandlerAdapter() {
        @Override
        public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
          assertTrue(ctx.channel().isActive());
          latch.countDown();
          super.handlerAdded(ctx);
        }
      });

  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  assertEquals(1, latch.getCount());

  chan.connect(addr).sync();
  chan.pipeline().fireUserEventTriggered(ProtocolNegotiationEvent.DEFAULT);
  assertTrue(latch.await(TIMEOUT_SECONDS, TimeUnit.SECONDS));
  assertNull(chan.pipeline().context(WaitUntilActiveHandler.class));
}
 

@Test
public void uncaughtReadFails() throws Exception {
  WriteBufferingAndExceptionHandler handler =
      new WriteBufferingAndExceptionHandler(new ChannelHandlerAdapter() {});
  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  cf.sync();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  ChannelFuture wf = chan.writeAndFlush(new Object());
  chan.connect(addr);
  chan.pipeline().fireChannelRead(Unpooled.copiedBuffer(new byte[] {'a'}));

  try {
    wf.sync();
    fail();
  } catch (Exception e) {
    Status status = Status.fromThrowable(e);
    assertThat(status.getCode()).isEqualTo(Code.INTERNAL);
    assertThat(status.getDescription()).contains("channelRead() missed");
  }
}
 

@Test
public void handlerRemovedFailuresPropagated() throws Exception {
  WriteBufferingAndExceptionHandler handler =
      new WriteBufferingAndExceptionHandler(new ChannelHandlerAdapter() {
        @Override
        public void handlerRemoved(ChannelHandlerContext ctx) {
          ctx.pipeline().remove(
              ctx.pipeline().context(WriteBufferingAndExceptionHandler.class).name());
        }
      });
  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  cf.sync();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  chan.connect(addr);
  ChannelFuture wf = chan.writeAndFlush(new Object());
  chan.pipeline().removeFirst();

  try {
    wf.sync();
    fail();
  } catch (Exception e) {
    Status status = Status.fromThrowable(e);
    assertThat(status.getCode()).isEqualTo(Code.INTERNAL);
    assertThat(status.getDescription()).contains("Buffer removed");
  }
}
 

@Test
public void uncaughtException_closeAtMostOnce() throws Exception {
  final AtomicInteger closes = new AtomicInteger();
  WriteBufferingAndExceptionHandler handler =
      new WriteBufferingAndExceptionHandler(new ChannelDuplexHandler() {
        @Override
        public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
          closes.getAndIncrement();
          // Simulates a loop between this handler and the WriteBufferingAndExceptionHandler.
          ctx.fireExceptionCaught(Status.ABORTED.withDescription("zap").asRuntimeException());
          super.close(ctx, promise);
        }
      });
  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  cf.sync();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  chan.connect(addr).sync();
  chan.close().sync();
  assertEquals(1, closes.get());
}
 

@Test
public void uncaughtExceptionFailuresPropagated() throws Exception {
  WriteBufferingAndExceptionHandler handler =
      new WriteBufferingAndExceptionHandler(new ChannelHandlerAdapter() {});
  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  cf.sync();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  ChannelFuture wf = chan.writeAndFlush(new Object());
  chan.connect(addr);
  chan.pipeline().fireExceptionCaught(Status.ABORTED.withDescription("zap").asRuntimeException());

  try {
    wf.sync();
    fail();
  } catch (Exception e) {
    Status status = Status.fromThrowable(e);
    assertThat(status.getCode()).isEqualTo(Code.ABORTED);
    assertThat(status.getDescription()).contains("zap");
  }
}
 

@Test
public void channelCloseFailuresPropagated() throws Exception {
  WriteBufferingAndExceptionHandler handler =
      new WriteBufferingAndExceptionHandler(new ChannelHandlerAdapter() {});
  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  cf.sync();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  ChannelFuture wf = chan.writeAndFlush(new Object());
  chan.connect(addr);
  chan.close();

  try {
    wf.sync();
    fail();
  } catch (Exception e) {
    Status status = Status.fromThrowable(e);
    assertThat(status.getCode()).isEqualTo(Code.UNAVAILABLE);
    assertThat(status.getDescription())
        .contains("Connection closing while performing protocol negotiation");
  }
}
 

@Test
public void channelInactiveFailuresPropagated() throws Exception {
  WriteBufferingAndExceptionHandler handler =
      new WriteBufferingAndExceptionHandler(new ChannelHandlerAdapter() {});
  LocalAddress addr = new LocalAddress("local");
  ChannelFuture cf = new Bootstrap()
      .channel(LocalChannel.class)
      .handler(handler)
      .group(group)
      .register();
  chan = cf.channel();
  cf.sync();
  ChannelFuture sf = new ServerBootstrap()
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelHandlerAdapter() {})
      .group(group)
      .bind(addr);
  server = sf.channel();
  sf.sync();

  ChannelFuture wf = chan.writeAndFlush(new Object());
  chan.connect(addr);
  chan.pipeline().fireChannelInactive();

  try {
    wf.sync();
    fail();
  } catch (Exception e) {
    Status status = Status.fromThrowable(e);
    assertThat(status.getCode()).isEqualTo(Code.UNAVAILABLE);
    assertThat(status.getDescription())
        .contains("Connection closed while performing protocol negotiation");
  }
}
 

@Override
protected AbstractServerImplBuilder<?> getServerBuilder() {
  return NettyServerBuilder
      .forAddress(new LocalAddress("in-process-1"))
      .flowControlWindow(65 * 1024)
      .maxInboundMessageSize(AbstractInteropTest.MAX_MESSAGE_SIZE)
      .channelType(LocalServerChannel.class)
      .workerEventLoopGroup(eventLoopGroup)
      .bossEventLoopGroup(eventLoopGroup);
}
 

ServerBootstrap getLocalServerBootstrap() {
    EventLoopGroup serverGroup = new LocalEventLoopGroup();
    ServerBootstrap sb = new ServerBootstrap();
    sb.group(serverGroup);
    sb.channel(LocalServerChannel.class);
    sb.childHandler(new ChannelInitializer<LocalChannel>() {
        @Override
        public void initChannel(LocalChannel ch) throws Exception {
        }
    });

    return sb;
}
 

@Test
public void testTryWithResourcesShouldCloseAllClustersButNotEventLoopAndTimerIfProvided()
    throws Exception {
  EventLoopGroup eventLoop = new DefaultEventLoopGroup();
  Timer timer = new HashedWheelTimer();
  BoundCluster cluster;
  MockClient client;

  try (Server server =
      Server.builder()
          .withAddressResolver(localAddressResolver)
          .withTimer(timer)
          .withEventLoopGroup(eventLoop, LocalServerChannel.class)
          .build()) {

    cluster = server.register(ClusterSpec.builder().withNodes(5));
    BoundNode node = cluster.node(0);
    SocketAddress address = node.getAddress();
    client = new MockClient(eventLoop);
    client.connect(address);
  }

  // event loop should not have been closed.
  assertThat(eventLoop.isShutdown()).isFalse();
  // timer should not have since a custom one was not provided.
  cluster
      .getServer()
      .timer
      .newTimeout(
          timeout -> {
            // noop
          },
          1,
          TimeUnit.SECONDS);

  eventLoop.shutdownGracefully(0, 0, TimeUnit.SECONDS);
  timer.stop();
}
 

@Test
public void testTryWithResourcesShouldCloseAllClustersButNotEventLoopIfProvided()
    throws Exception {
  EventLoopGroup eventLoop = new DefaultEventLoopGroup();
  BoundCluster cluster;
  MockClient client;

  try (Server server =
      Server.builder()
          .withAddressResolver(localAddressResolver)
          .withEventLoopGroup(eventLoop, LocalServerChannel.class)
          .build()) {

    cluster = server.register(ClusterSpec.builder().withNodes(5));
    BoundNode node = cluster.node(0);
    SocketAddress address = node.getAddress();
    client = new MockClient(eventLoop);
    client.connect(address);
  }

  // event loop should not have been closed.
  assertThat(eventLoop.isShutdown()).isFalse();
  // timer should have since a custom one was not provided.
  try {
    cluster
        .getServer()
        .timer
        .newTimeout(
            timeout -> {
              // noop
            },
            1,
            TimeUnit.SECONDS);
    fail("Expected IllegalStateException");
  } catch (IllegalStateException ise) {
    // expected
  }
  eventLoop.shutdownGracefully(0, 0, TimeUnit.SECONDS);
}
 

@Test(timeout = 5000)
public void testHandlerRegister() throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
    LocalEventLoopGroup group = new LocalEventLoopGroup(1);
    try {
        ServerBootstrap sb = new ServerBootstrap();
        sb.channel(LocalServerChannel.class)
          .group(group)
          .childHandler(new ChannelInboundHandlerAdapter())
          .handler(new ChannelHandlerAdapter() {
              @Override
              public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
                  try {
                      assertTrue(ctx.executor().inEventLoop());
                  } catch (Throwable cause) {
                      error.set(cause);
                  } finally {
                      latch.countDown();
                  }
              }
          });
        sb.register().syncUninterruptibly();
        latch.await();
        assertNull(error.get());
    } finally {
        group.shutdownGracefully();
    }
}
 

ServerBootstrap getLocalServerBootstrap() {
    EventLoopGroup serverGroup = new DefaultEventLoopGroup();
    ServerBootstrap sb = new ServerBootstrap();
    sb.group(serverGroup);
    sb.channel(LocalServerChannel.class);
    sb.childHandler(new ChannelInitializer<LocalChannel>() {
        @Override
        public void initChannel(LocalChannel ch) throws Exception {
        }
    });

    return sb;
}
 

/**
 * Tests that the acquiredChannelCount is not added up several times for the same channel acquire request.
 * @throws Exception
 */
@Test
public void testAcquireNewConnectionWhen() throws Exception {
    LocalAddress addr = new LocalAddress(LOCAL_ADDR_ID);
    Bootstrap cb = new Bootstrap();
    cb.remoteAddress(addr);
    cb.group(group)
      .channel(LocalChannel.class);

    ServerBootstrap sb = new ServerBootstrap();
    sb.group(group)
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelInitializer<LocalChannel>() {
          @Override
          public void initChannel(LocalChannel ch) throws Exception {
              ch.pipeline().addLast(new ChannelInboundHandlerAdapter());
          }
      });

    // Start server
    Channel sc = sb.bind(addr).syncUninterruptibly().channel();
    ChannelPoolHandler handler = new TestChannelPoolHandler();
    ChannelPool pool = new FixedChannelPool(cb, handler, 1);
    Channel channel1 = pool.acquire().syncUninterruptibly().getNow();
    channel1.close().syncUninterruptibly();
    pool.release(channel1);

    Channel channel2 = pool.acquire().syncUninterruptibly().getNow();

    assertNotSame(channel1, channel2);
    sc.close().syncUninterruptibly();
    channel2.close().syncUninterruptibly();
}
 

/**
 * Tests that if channel was unhealthy it is was offered back to the pool because
 * it was requested not to validate channel health on release.
 *
 * @throws Exception
 */
@Test
public void testUnhealthyChannelIsOfferedWhenNoHealthCheckRequested() throws Exception {
    EventLoopGroup group = new LocalEventLoopGroup();
    LocalAddress addr = new LocalAddress(LOCAL_ADDR_ID);
    Bootstrap cb = new Bootstrap();
    cb.remoteAddress(addr);
    cb.group(group)
      .channel(LocalChannel.class);

    ServerBootstrap sb = new ServerBootstrap();
    sb.group(group)
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelInitializer<LocalChannel>() {
          @Override
          public void initChannel(LocalChannel ch) throws Exception {
              ch.pipeline().addLast(new ChannelInboundHandlerAdapter());
          }
      });

    // Start server
    Channel sc = sb.bind(addr).syncUninterruptibly().channel();
    ChannelPoolHandler handler = new CountingChannelPoolHandler();
    ChannelPool pool = new SimpleChannelPool(cb, handler, ChannelHealthChecker.ACTIVE, false);
    Channel channel1 = pool.acquire().syncUninterruptibly().getNow();
    channel1.close().syncUninterruptibly();
    Future<Void> releaseFuture =
            pool.release(channel1, channel1.eventLoop().<Void>newPromise()).syncUninterruptibly();
    assertThat(releaseFuture.isSuccess(), CoreMatchers.is(true));

    Channel channel2 = pool.acquire().syncUninterruptibly().getNow();
    //verifying that in fact the channel2 is different that means is not pulled from the pool
    assertNotSame(channel1, channel2);
    sc.close().syncUninterruptibly();
    channel2.close().syncUninterruptibly();
    group.shutdownGracefully();
}
 

/**
 * Tests that if channel was unhealthy it is not offered back to the pool.
 *
 * @throws Exception
 */
@Test
public void testUnhealthyChannelIsNotOffered() throws Exception {
    EventLoopGroup group = new LocalEventLoopGroup();
    LocalAddress addr = new LocalAddress(LOCAL_ADDR_ID);
    Bootstrap cb = new Bootstrap();
    cb.remoteAddress(addr);
    cb.group(group)
      .channel(LocalChannel.class);

    ServerBootstrap sb = new ServerBootstrap();
    sb.group(group)
      .channel(LocalServerChannel.class)
      .childHandler(new ChannelInitializer<LocalChannel>() {
          @Override
          public void initChannel(LocalChannel ch) throws Exception {
              ch.pipeline().addLast(new ChannelInboundHandlerAdapter());
          }
      });

    // Start server
    Channel sc = sb.bind(addr).syncUninterruptibly().channel();
    ChannelPoolHandler handler = new CountingChannelPoolHandler();
    ChannelPool pool = new SimpleChannelPool(cb, handler);
    Channel channel1 = pool.acquire().syncUninterruptibly().getNow();
    pool.release(channel1).syncUninterruptibly();
    Channel channel2 = pool.acquire().syncUninterruptibly().getNow();
    //first check that when returned healthy then it actually offered back to the pool.
    assertSame(channel1, channel2);

    channel1.close().syncUninterruptibly();

    pool.release(channel1).syncUninterruptibly();
    Channel channel3 = pool.acquire().syncUninterruptibly().getNow();
    //channel1 was not healthy anymore so it should not get acquired anymore.
    assertNotSame(channel1, channel3);
    sc.close().syncUninterruptibly();
    channel3.close().syncUninterruptibly();
    group.shutdownGracefully();
}
 

@Before
public void setUp() {
    group = new DefaultEventLoopGroup(1);
    server = new ServerBootstrap()
            .group(group)
            .channel(LocalServerChannel.class)
            .localAddress(SERVER_ADDRESS);
    client = new Bootstrap()
            .group(group)
            .channel(LocalChannel.class)
            .handler(new ChannelInboundHandlerAdapter());
    testHandler = new InspectableHandler();
}
 

private static Channel newServer(EventLoopGroup group, SocketAddress address,
        SslContext context, byte[] response, ChannelHandler handler) {

    ServerBootstrap bootstrap = new ServerBootstrap()
            .channel(LocalServerChannel.class)
            .group(group)
            .childHandler(newServerHandler(context, response, handler));

    return bootstrap.bind(address)
            .syncUninterruptibly()
            .channel();
}
 

@Test
public void testRegisterClusterFailsWhenBindTimesOut() throws Exception {
  // Designated address to be slow to bind.
  SocketAddress slowAddr = localAddressResolver.get();

  // create a bootstrap with a handler that delays binding by 1 second for designated address.
  ServerBootstrap serverBootstrap =
      new ServerBootstrap()
          .group(eventLoop)
          .channel(LocalServerChannel.class)
          .handler(new SlowBindHandler(slowAddr))
          .childHandler(new Server.Initializer());

  // Define server with 500ms timeout, which should cause binding of slow address to timeout and
  // fail register.
  Server flakyServer =
      new Server(
          localAddressResolver,
          eventLoop,
          true,
          new HashedWheelTimer(),
          false,
          TimeUnit.NANOSECONDS.convert(500, TimeUnit.MILLISECONDS),
          new StubStore(),
          false,
          serverBootstrap);

  // Create a 2 node cluster with 1 node having the slow address.
  ClusterSpec cluster = ClusterSpec.builder().build();
  DataCenterSpec dc = cluster.addDataCenter().build();
  dc.addNode().withAddress(slowAddr).build();
  dc.addNode().build();

  // Attempt to register which should fail.
  try {
    flakyServer.register(cluster);
    fail();
  } catch (Exception e) {
    // Expect a timeout exception.
    assertThat(e.getCause()).isInstanceOf(TimeoutException.class);
  }
}
 

@Test
public void waitUntilActiveHandler_firesNegotiation() throws Exception {
  EventLoopGroup elg = new DefaultEventLoopGroup(1);
  SocketAddress addr = new LocalAddress("addr");
  final AtomicReference<Object> event = new AtomicReference<>();
  ChannelHandler next = new ChannelInboundHandlerAdapter() {
    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
      event.set(evt);
      ctx.close();
    }
  };
  Channel s = new ServerBootstrap()
      .childHandler(new ChannelInboundHandlerAdapter())
      .group(elg)
      .channel(LocalServerChannel.class)
      .bind(addr)
      .sync()
      .channel();
  Channel c = new Bootstrap()
      .handler(new WaitUntilActiveHandler(next))
      .channel(LocalChannel.class).group(group)
      .connect(addr)
      .sync()
      .channel();
  c.pipeline().fireUserEventTriggered(ProtocolNegotiationEvent.DEFAULT);
  SocketAddress localAddr = c.localAddress();
  ProtocolNegotiationEvent expectedEvent = ProtocolNegotiationEvent.DEFAULT
      .withAttributes(
          Attributes.newBuilder()
              .set(Grpc.TRANSPORT_ATTR_LOCAL_ADDR, localAddr)
              .set(Grpc.TRANSPORT_ATTR_REMOTE_ADDR, addr)
              .set(GrpcAttributes.ATTR_SECURITY_LEVEL, SecurityLevel.NONE)
              .build());

  c.closeFuture().sync();
  assertThat(event.get()).isInstanceOf(ProtocolNegotiationEvent.class);
  ProtocolNegotiationEvent actual = (ProtocolNegotiationEvent) event.get();
  assertThat(actual).isEqualTo(expectedEvent);

  s.close();
  elg.shutdownGracefully();
}
 

@Test
public void clientTlsHandler_firesNegotiation() throws Exception {
  SelfSignedCertificate cert = new SelfSignedCertificate("authority");
  SslContext clientSslContext =
      GrpcSslContexts.configure(SslContextBuilder.forClient().trustManager(cert.cert())).build();
  SslContext serverSslContext =
      GrpcSslContexts.configure(SslContextBuilder.forServer(cert.key(), cert.cert())).build();
  FakeGrpcHttp2ConnectionHandler gh = FakeGrpcHttp2ConnectionHandler.newHandler();
  ClientTlsProtocolNegotiator pn = new ClientTlsProtocolNegotiator(clientSslContext, null);
  WriteBufferingAndExceptionHandler clientWbaeh =
      new WriteBufferingAndExceptionHandler(pn.newHandler(gh));

  SocketAddress addr = new LocalAddress("addr");

  ChannelHandler sh =
      ProtocolNegotiators.serverTls(serverSslContext)
          .newHandler(FakeGrpcHttp2ConnectionHandler.noopHandler());
  WriteBufferingAndExceptionHandler serverWbaeh = new WriteBufferingAndExceptionHandler(sh);
  Channel s = new ServerBootstrap()
      .childHandler(serverWbaeh)
      .group(group)
      .channel(LocalServerChannel.class)
      .bind(addr)
      .sync()
      .channel();
  Channel c = new Bootstrap()
      .handler(clientWbaeh)
      .channel(LocalChannel.class)
      .group(group)
      .register()
      .sync()
      .channel();
  ChannelFuture write = c.writeAndFlush(NettyClientHandler.NOOP_MESSAGE);
  c.connect(addr).sync();
  write.sync();

  boolean completed = gh.negotiated.await(TIMEOUT_SECONDS, TimeUnit.SECONDS);
  if (!completed) {
    assertTrue("failed to negotiated", write.await(TIMEOUT_SECONDS, TimeUnit.SECONDS));
    // sync should fail if we are in this block.
    write.sync();
    throw new AssertionError("neither wrote nor negotiated");
  }
  c.close();
  s.close();
  pn.close();

  assertThat(gh.securityInfo).isNotNull();
  assertThat(gh.securityInfo.tls).isNotNull();
  assertThat(gh.attrs.get(GrpcAttributes.ATTR_SECURITY_LEVEL))
      .isEqualTo(SecurityLevel.PRIVACY_AND_INTEGRITY);
  assertThat(gh.attrs.get(Grpc.TRANSPORT_ATTR_SSL_SESSION)).isInstanceOf(SSLSession.class);
  // This is not part of the ClientTls negotiation, but shows that the negotiation event happens
  // in the right order.
  assertThat(gh.attrs.get(Grpc.TRANSPORT_ATTR_REMOTE_ADDR)).isEqualTo(addr);
}
 

private static void testSniClient(SslProvider sslClientProvider, SslProvider sslServerProvider) throws Exception {
    final String sniHost = "sni.netty.io";
    LocalAddress address = new LocalAddress("test");
    EventLoopGroup group = new DefaultEventLoopGroup(1);
    Channel sc = null;
    Channel cc = null;
    try {
        SelfSignedCertificate cert = new SelfSignedCertificate();
        final SslContext sslServerContext = SslContextBuilder.forServer(cert.key(), cert.cert())
                .sslProvider(sslServerProvider).build();

        final Promise<String> promise = group.next().newPromise();
        ServerBootstrap sb = new ServerBootstrap();
        sc = sb.group(group).channel(LocalServerChannel.class).childHandler(new ChannelInitializer<Channel>() {
            @Override
            protected void initChannel(Channel ch) throws Exception {
                ch.pipeline().addFirst(new SniHandler(new Mapping<String, SslContext>() {
                    @Override
                    public SslContext map(String input) {
                        promise.setSuccess(input);
                        return sslServerContext;
                    }
                }));
            }
        }).bind(address).syncUninterruptibly().channel();

        SslContext sslContext = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE)
                .sslProvider(sslClientProvider).build();
        Bootstrap cb = new Bootstrap();
        cc = cb.group(group).channel(LocalChannel.class).handler(new SslHandler(
                sslContext.newEngine(ByteBufAllocator.DEFAULT, sniHost, -1)))
                .connect(address).syncUninterruptibly().channel();
        Assert.assertEquals(sniHost, promise.syncUninterruptibly().getNow());
    } finally {
        if (cc != null) {
            cc.close().syncUninterruptibly();
        }
        if (sc != null) {
            sc.close().syncUninterruptibly();
        }
        group.shutdownGracefully();
    }
}