Examples with DisconnectListener org.eclipse.hono.client.DisconnectListener used on opensource projects

Example 1 with DisconnectListener

use of org.eclipse.hono.client.DisconnectListener in project hono by eclipse.

the class HonoConnectionImplTest method testOnRemoteCloseTriggeredReconnectChecksReconnectAttempts.

/**
 * Verifies that when the client tries to re-connect to a server instance if the
 * connection is closed by the peer, the configured number of reconnect attempts is taken
 * into account, skipping the reconnect if that number is zero.
 *
 * @param ctx The test context.
 */
@Test
public void testOnRemoteCloseTriggeredReconnectChecksReconnectAttempts(final VertxTestContext ctx) {
    // GIVEN a client that is connected to a server but should do no automatic reconnect
    props.setReconnectAttempts(0);
    honoConnection = new HonoConnectionImpl(vertx, connectionFactory, props);
    final Promise<HonoConnection> connected = Promise.promise();
    @SuppressWarnings("unchecked") final DisconnectListener<HonoConnection> disconnectListener = mock(DisconnectListener.class);
    honoConnection.addDisconnectListener(disconnectListener);
    final AtomicInteger reconnectListenerInvocations = new AtomicInteger();
    honoConnection.addReconnectListener(con -> reconnectListenerInvocations.incrementAndGet());
    honoConnection.connect(new ProtonClientOptions().setReconnectAttempts(0)).onComplete(connected);
    connected.future().onComplete(ctx.succeeding(c -> {
        // WHEN the peer closes the connection
        connectionFactory.getCloseHandler().handle(Future.failedFuture("shutting down for maintenance"));
        ctx.verify(() -> {
            // THEN the client invokes the registered disconnect handler
            verify(disconnectListener).onDisconnect(honoConnection);
            // and the original connection has been closed locally
            verify(con).close();
            verify(con).disconnectHandler(null);
            // and no further connect invocation has been done
            assertThat(connectionFactory.getConnectInvocations()).isEqualTo(1);
            assertThat(reconnectListenerInvocations.get()).isEqualTo(0);
        });
        ctx.completeNow();
    }));
}

Example 2 with DisconnectListener

use of org.eclipse.hono.client.DisconnectListener in project hono by eclipse.

the class HonoConnectionImplTest method testRemoteSessionCloseTriggersReconnection.

/**
 * Verifies that the client tries to reconnect to the peer if the peer
 * closes the connection's session.
 *
 * @param ctx The test context.
 */
@Test
public void testRemoteSessionCloseTriggersReconnection(final VertxTestContext ctx) {
    // GIVEN a client that is connected to a server
    final Promise<HonoConnection> connected = Promise.promise();
    @SuppressWarnings("unchecked") final DisconnectListener<HonoConnection> disconnectListener = mock(DisconnectListener.class);
    honoConnection.addDisconnectListener(disconnectListener);
    final AtomicInteger reconnectListenerInvocations = new AtomicInteger();
    honoConnection.addReconnectListener(con -> reconnectListenerInvocations.incrementAndGet());
    props.setServerRole("service-provider");
    honoConnection.connect(new ProtonClientOptions()).onComplete(connected);
    connectionFactory.setExpectedSucceedingConnectionAttempts(1);
    connected.future().onComplete(ctx.succeeding(c -> {
        ctx.verify(() -> {
            // WHEN the peer closes the session
            final ArgumentCaptor<Handler<AsyncResult<ProtonSession>>> sessionCloseHandler = VertxMockSupport.argumentCaptorHandler();
            verify(session).closeHandler(sessionCloseHandler.capture());
            sessionCloseHandler.getValue().handle(Future.succeededFuture(session));
            // THEN the client invokes the registered disconnect handler
            verify(disconnectListener).onDisconnect(honoConnection);
            // and the original connection has been closed locally
            verify(con).close();
            verify(con).disconnectHandler(null);
            // and the connection is re-established
            assertThat(connectionFactory.await()).isTrue();
            assertThat(reconnectListenerInvocations.get()).isEqualTo(1);
        });
        ctx.completeNow();
    }));
}

Example 3 with DisconnectListener

use of org.eclipse.hono.client.DisconnectListener in project hono by eclipse.

the class HonoConnectionImpl method createReceiver.

@Override
public Future<ProtonReceiver> createReceiver(final String sourceAddress, final ProtonQoS qos, final ProtonMessageHandler messageHandler, final int preFetchSize, final boolean autoAccept, final Handler<String> remoteCloseHook) {
    Objects.requireNonNull(sourceAddress);
    Objects.requireNonNull(qos);
    Objects.requireNonNull(messageHandler);
    if (preFetchSize < 0) {
        throw new IllegalArgumentException("pre-fetch size must be >= 0");
    }
    return executeOnContext(result -> {
        checkConnected().compose(v -> {
            final Promise<ProtonReceiver> receiverPromise = Promise.promise();
            final ProtonReceiver receiver = session.createReceiver(sourceAddress);
            if (clientConfigProperties.getMaxMessageSize() > ClientConfigProperties.MAX_MESSAGE_SIZE_UNLIMITED) {
                receiver.setMaxMessageSize(new UnsignedLong(clientConfigProperties.getMaxMessageSize()));
            }
            receiver.setAutoAccept(autoAccept);
            receiver.setQoS(qos);
            receiver.setPrefetch(preFetchSize);
            receiver.handler((delivery, message) -> {
                HonoProtonHelper.onReceivedMessageDeliveryUpdatedFromRemote(delivery, d -> log.debug("got unexpected disposition update for received message [remote state: {}]", delivery.getRemoteState()));
                try {
                    messageHandler.handle(delivery, message);
                    if (log.isTraceEnabled()) {
                        final int remainingCredits = receiver.getCredit() - receiver.getQueued();
                        log.trace("handling message [remotely settled: {}, queued messages: {}, remaining credit: {}]", delivery.remotelySettled(), receiver.getQueued(), remainingCredits);
                    }
                } catch (final Exception ex) {
                    log.warn("error handling message", ex);
                    ProtonHelper.released(delivery, true);
                }
            });
            final DisconnectListener<HonoConnection> disconnectBeforeOpenListener = (con) -> {
                log.debug("opening receiver [{}] failed: got disconnected", sourceAddress);
                receiverPromise.tryFail(new ServerErrorException(HttpURLConnection.HTTP_UNAVAILABLE, "not connected"));
            };
            oneTimeDisconnectListeners.add(disconnectBeforeOpenListener);
            receiver.openHandler(recvOpen -> {
                oneTimeDisconnectListeners.remove(disconnectBeforeOpenListener);
                // the result future may have already been completed here in case of a link establishment timeout
                if (receiverPromise.future().isComplete()) {
                    log.debug("ignoring server response for opening receiver [{}]: receiver creation already timed out", sourceAddress);
                } else if (recvOpen.failed()) {
                    // this means that we have received the peer's attach
                    // and the subsequent detach frame in one TCP read
                    final ErrorCondition error = receiver.getRemoteCondition();
                    if (error == null) {
                        log.debug("opening receiver [{}] failed", sourceAddress, recvOpen.cause());
                        receiverPromise.tryFail(new ClientErrorException(HttpURLConnection.HTTP_NOT_FOUND, "cannot open receiver", recvOpen.cause()));
                    } else {
                        log.debug("opening receiver [{}] failed: {} - {}", sourceAddress, error.getCondition(), error.getDescription());
                        receiverPromise.tryFail(StatusCodeMapper.fromAttachError(error));
                    }
                } else if (HonoProtonHelper.isLinkEstablished(receiver)) {
                    log.debug("receiver open [source: {}]", sourceAddress);
                    receiverPromise.tryComplete(recvOpen.result());
                } else {
                    // this means that the peer did not create a local terminus for the link
                    // and will send a detach frame for closing the link very shortly
                    // see AMQP 1.0 spec section 2.6.3
                    log.debug("peer did not create terminus for source [{}] and will detach the link", sourceAddress);
                    receiverPromise.tryFail(new ServerErrorException(HttpURLConnection.HTTP_UNAVAILABLE));
                }
            });
            HonoProtonHelper.setDetachHandler(receiver, remoteDetached -> onRemoteDetach(receiver, connection.getRemoteContainer(), false, remoteCloseHook));
            HonoProtonHelper.setCloseHandler(receiver, remoteClosed -> onRemoteDetach(receiver, connection.getRemoteContainer(), true, remoteCloseHook));
            receiver.open();
            vertx.setTimer(clientConfigProperties.getLinkEstablishmentTimeout(), tid -> {
                final boolean notOpenedAndNotDisconnectedYet = oneTimeDisconnectListeners.remove(disconnectBeforeOpenListener);
                if (notOpenedAndNotDisconnectedYet) {
                    onLinkEstablishmentTimeout(receiver, clientConfigProperties, receiverPromise);
                }
            });
            return receiverPromise.future();
        }).onComplete(result);
    });
}

Example 4 with DisconnectListener

use of org.eclipse.hono.client.DisconnectListener in project hono by eclipse.

the class HonoConnectionImpl method createSender.

/**
 * Creates a sender link.
 *
 * @param targetAddress The target address of the link. If the address is {@code null}, the
 *                      sender link will be established to the 'anonymous relay' and each
 *                      message must specify its destination address.
 * @param qos The quality of service to use for the link.
 * @param closeHook The handler to invoke when the link is closed by the peer (may be {@code null}).
 * @return A future for the created link. The future will be completed once the link is open.
 *         The future will fail with a {@link ServiceInvocationException} if the link cannot be opened.
 * @throws NullPointerException if qos is {@code null}.
 */
@Override
public final Future<ProtonSender> createSender(final String targetAddress, final ProtonQoS qos, final Handler<String> closeHook) {
    Objects.requireNonNull(qos);
    return executeOnContext(result -> {
        checkConnected().compose(v -> {
            if (targetAddress == null && !supportsCapability(Constants.CAP_ANONYMOUS_RELAY)) {
                // before a client can use anonymous terminus
                return Future.failedFuture(new ServerErrorException(HttpURLConnection.HTTP_NOT_IMPLEMENTED, "server does not support anonymous terminus"));
            }
            final Promise<ProtonSender> senderPromise = Promise.promise();
            final ProtonSender sender = session.createSender(targetAddress);
            sender.setQoS(qos);
            sender.setAutoSettle(true);
            final DisconnectListener<HonoConnection> disconnectBeforeOpenListener = (con) -> {
                log.debug("opening sender [{}] failed: got disconnected", targetAddress);
                senderPromise.tryFail(new ServerErrorException(HttpURLConnection.HTTP_UNAVAILABLE, "not connected"));
            };
            oneTimeDisconnectListeners.add(disconnectBeforeOpenListener);
            sender.openHandler(senderOpen -> {
                oneTimeDisconnectListeners.remove(disconnectBeforeOpenListener);
                // the result future may have already been completed here in case of a link establishment timeout
                if (senderPromise.future().isComplete()) {
                    log.debug("ignoring server response for opening sender [{}]: sender creation already timed out", targetAddress);
                } else if (senderOpen.failed()) {
                    // this means that we have received the peer's attach
                    // and the subsequent detach frame in one TCP read
                    final ErrorCondition error = sender.getRemoteCondition();
                    if (error == null) {
                        log.debug("opening sender [{}] failed", targetAddress, senderOpen.cause());
                        senderPromise.tryFail(new ClientErrorException(HttpURLConnection.HTTP_NOT_FOUND, "cannot open sender", senderOpen.cause()));
                    } else {
                        log.debug("opening sender [{}] failed: {} - {}", targetAddress, error.getCondition(), error.getDescription());
                        senderPromise.tryFail(StatusCodeMapper.fromAttachError(error));
                    }
                } else if (HonoProtonHelper.isLinkEstablished(sender)) {
                    log.debug("sender open [target: {}, sendQueueFull: {}, remote max-message-size: {}]", targetAddress, sender.sendQueueFull(), sender.getRemoteMaxMessageSize());
                    final long remoteMaxMessageSize = Optional.ofNullable(sender.getRemoteMaxMessageSize()).map(UnsignedLong::longValue).orElse(0L);
                    if (remoteMaxMessageSize > 0 && remoteMaxMessageSize < clientConfigProperties.getMinMaxMessageSize()) {
                        // peer won't accept our (biggest) messages
                        sender.close();
                        final String msg = String.format("peer does not support minimum max-message-size [required: %d, supported: %d", clientConfigProperties.getMinMaxMessageSize(), remoteMaxMessageSize);
                        log.debug(msg);
                        senderPromise.tryFail(new ClientErrorException(HttpURLConnection.HTTP_PRECON_FAILED, msg));
                    } else if (sender.getCredit() <= 0) {
                        // wait on credits a little time, if not already given
                        final long waitOnCreditsTimerId = vertx.setTimer(clientConfigProperties.getFlowLatency(), timerID -> {
                            log.debug("sender [target: {}] has {} credits after grace period of {}ms", targetAddress, sender.getCredit(), clientConfigProperties.getFlowLatency());
                            sender.sendQueueDrainHandler(null);
                            senderPromise.tryComplete(sender);
                        });
                        sender.sendQueueDrainHandler(replenishedSender -> {
                            log.debug("sender [target: {}] has received {} initial credits", targetAddress, replenishedSender.getCredit());
                            if (vertx.cancelTimer(waitOnCreditsTimerId)) {
                                result.tryComplete(replenishedSender);
                                replenishedSender.sendQueueDrainHandler(null);
                            }
                        // otherwise the timer has already completed the future and cleaned up
                        // sendQueueDrainHandler
                        });
                    } else {
                        senderPromise.tryComplete(sender);
                    }
                } else {
                    // this means that the peer did not create a local terminus for the link
                    // and will send a detach frame for closing the link very shortly
                    // see AMQP 1.0 spec section 2.6.3
                    log.debug("peer did not create terminus for target [{}] and will detach the link", targetAddress);
                    senderPromise.tryFail(new ServerErrorException(HttpURLConnection.HTTP_UNAVAILABLE));
                }
            });
            HonoProtonHelper.setDetachHandler(sender, remoteDetached -> onRemoteDetach(sender, connection.getRemoteContainer(), false, closeHook));
            HonoProtonHelper.setCloseHandler(sender, remoteClosed -> onRemoteDetach(sender, connection.getRemoteContainer(), true, closeHook));
            sender.open();
            vertx.setTimer(clientConfigProperties.getLinkEstablishmentTimeout(), tid -> {
                final boolean notOpenedAndNotDisconnectedYet = oneTimeDisconnectListeners.remove(disconnectBeforeOpenListener);
                if (notOpenedAndNotDisconnectedYet) {
                    onLinkEstablishmentTimeout(sender, clientConfigProperties, senderPromise);
                }
            });
            return senderPromise.future();
        }).onComplete(result);
    });
}

Example 5 with DisconnectListener

use of org.eclipse.hono.client.DisconnectListener in project hono by eclipse.

the class HonoConnectionImplTest method testOnRemoteCloseTriggersReconnection.

/**
 * Verifies that the client tries to re-connect to a server instance if the
 * connection is closed by the peer.
 *
 * @param ctx The test context.
 */
@Test
public void testOnRemoteCloseTriggersReconnection(final VertxTestContext ctx) {
    // GIVEN a client that is connected to a server
    final Promise<HonoConnection> connected = Promise.promise();
    @SuppressWarnings("unchecked") final DisconnectListener<HonoConnection> disconnectListener = mock(DisconnectListener.class);
    honoConnection.addDisconnectListener(disconnectListener);
    final AtomicInteger reconnectListenerInvocations = new AtomicInteger();
    honoConnection.addReconnectListener(con -> reconnectListenerInvocations.incrementAndGet());
    honoConnection.connect(new ProtonClientOptions()).onComplete(connected);
    connectionFactory.setExpectedSucceedingConnectionAttempts(1);
    connected.future().onComplete(ctx.succeeding(c -> {
        // WHEN the peer closes the connection
        connectionFactory.getCloseHandler().handle(Future.failedFuture("shutting down for maintenance"));
        ctx.verify(() -> {
            // THEN the client invokes the registered disconnect handler
            verify(disconnectListener).onDisconnect(honoConnection);
            // and the original connection has been closed locally
            verify(con).close();
            verify(con).disconnectHandler(null);
            // and the connection is re-established
            assertThat(connectionFactory.await()).isTrue();
            assertThat(reconnectListenerInvocations.get()).isEqualTo(1);
        });
        ctx.completeNow();
    }));
}