Examples with EndpointConnectedEvent com.couchbase.client.core.cnc.events.endpoint.EndpointConnectedEvent used on opensource projects

Example 1 with EndpointConnectedEvent

use of com.couchbase.client.core.cnc.events.endpoint.EndpointConnectedEvent in project couchbase-jvm-clients by couchbase.

the class BaseEndpointTest method disconnectAfterBeingConnected.

/**
 * This test tests the happy path, after being connected properly eventually a disconnect
 * signal comes along.
 */
@Test
void disconnectAfterBeingConnected() {
    EmbeddedChannel channel = new EmbeddedChannel();
    InstrumentedEndpoint endpoint = connectSuccessfully(channel);
    assertTrue(channel.isOpen());
    assertTrue(channel.isActive());
    endpoint.disconnect();
    waitUntilCondition(() -> endpoint.state() == EndpointState.DISCONNECTED);
    assertFalse(channel.isOpen());
    assertFalse(channel.isActive());
    assertEquals(2, eventBus.publishedEvents().size());
    assertTrue(eventBus.publishedEvents().get(0) instanceof EndpointConnectedEvent);
    assertTrue(eventBus.publishedEvents().get(1) instanceof EndpointDisconnectedEvent);
}

Example 2 with EndpointConnectedEvent

use of com.couchbase.client.core.cnc.events.endpoint.EndpointConnectedEvent in project couchbase-jvm-clients by couchbase.

the class BaseEndpointTest method retryOnFailureUntilEventuallyConnected.

/**
 * The {@link #retryOnTimeoutUntilEventuallyConnected()} tests that a netty
 * channel future does not return at all and we reconnect, this one tests that
 * if netty returns with a failure we keep reconnecting until it succeeds.
 */
@Test
void retryOnFailureUntilEventuallyConnected() {
    final AtomicInteger invocationAttempt = new AtomicInteger();
    InstrumentedEndpoint endpoint = InstrumentedEndpoint.create(eventLoopGroup, ctx, () -> invocationAttempt.incrementAndGet() > 3 ? Mono.just(new EmbeddedChannel()) : Mono.error(new ChannelException("Could not connect for some reason")));
    endpoint.connect();
    waitUntilCondition(() -> endpoint.state() == EndpointState.CONNECTED);
    assertEquals(4, eventBus.publishedEvents().size());
    int warnings = 0;
    int debug = 0;
    for (Event event : eventBus.publishedEvents()) {
        if (event.severity() == Event.Severity.WARN) {
            assertTrue(event instanceof EndpointConnectionFailedEvent);
            warnings++;
        } else if (event.severity() == Event.Severity.DEBUG) {
            assertTrue(event instanceof EndpointConnectedEvent);
            debug++;
        } else {
            throw new RuntimeException("Unexpected Event" + event);
        }
    }
    assertEquals(3, warnings);
    assertEquals(1, debug);
}

Example 3 with EndpointConnectedEvent

use of com.couchbase.client.core.cnc.events.endpoint.EndpointConnectedEvent in project couchbase-jvm-clients by couchbase.

the class BaseEndpointTest method retryOnTimeoutUntilEventuallyConnected.

/**
 * This test fakes a situation where the channel future from netty would simply not return
 * at all and time out, and the client would resubscribe. Then at some future attempt the
 * future returns fine and we should end up in a connected state and ready to go.
 */
@Test
void retryOnTimeoutUntilEventuallyConnected() {
    SimpleEventBus eventBus = new SimpleEventBus(true);
    CoreEnvironment env = CoreEnvironment.builder().eventBus(eventBus).timeoutConfig(TimeoutConfig.connectTimeout(Duration.ofMillis(10))).build();
    CoreContext coreContext = new CoreContext(mock(Core.class), 1, env, authenticator);
    ServiceContext ctx = new ServiceContext(coreContext, LOCALHOST, 1234, ServiceType.KV, Optional.empty());
    try {
        final CompletableFuture<Channel> cf = new CompletableFuture<>();
        InstrumentedEndpoint endpoint = InstrumentedEndpoint.create(eventLoopGroup, ctx, () -> Mono.fromFuture(cf));
        endpoint.connect();
        waitUntilCondition(() -> eventBus.publishedEvents().size() >= 3);
        EmbeddedChannel channel = new EmbeddedChannel();
        cf.complete(channel);
        waitUntilCondition(() -> endpoint.state() == EndpointState.CONNECTED);
        assertTrue(eventBus.publishedEvents().size() >= 3);
        boolean failedFound = false;
        boolean successFound = false;
        for (Event event : eventBus.publishedEvents()) {
            if (event instanceof EndpointConnectionFailedEvent) {
                assertEquals(Event.Severity.WARN, event.severity());
                assertEquals(Duration.ofMillis(10), event.duration());
                failedFound = true;
            } else if (event instanceof EndpointConnectedEvent) {
                assertEquals(Event.Severity.DEBUG, event.severity());
                assertTrue(event.duration().toNanos() > 0);
                successFound = true;
            }
        }
        assertTrue(failedFound);
        assertTrue(successFound);
    } finally {
        env.shutdown();
    }
}

Example 4 with EndpointConnectedEvent

use of com.couchbase.client.core.cnc.events.endpoint.EndpointConnectedEvent in project couchbase-jvm-clients by couchbase.

the class BaseEndpoint method reconnect.

/**
 * This method performs the actual connecting logic.
 *
 * <p>It is called reconnect since it works both in the case where an initial attempt is made
 * but also when the underlying channel is closed or the previous connect attempt was
 * unsuccessful.</p>
 */
private void reconnect() {
    if (disconnect.get()) {
        return;
    }
    state.transition(EndpointState.CONNECTING);
    final EndpointContext endpointContext = this.endpointContext.get();
    final AtomicLong attemptStart = new AtomicLong();
    Mono.defer((Supplier<Mono<Channel>>) () -> {
        CoreEnvironment env = endpointContext.environment();
        long connectTimeoutMs = env.timeoutConfig().connectTimeout().toMillis();
        if (eventLoopGroup.isShutdown()) {
            throw new IllegalStateException("Event Loop is already shut down, not pursuing connect attempt!");
        }
        final Bootstrap channelBootstrap = new Bootstrap().remoteAddress(remoteAddress()).group(eventLoopGroup).channel(channelFrom(eventLoopGroup)).option(ChannelOption.CONNECT_TIMEOUT_MILLIS, (int) connectTimeoutMs).handler(new ChannelInitializer<Channel>() {

            @Override
            protected void initChannel(final Channel ch) {
                ChannelPipeline pipeline = ch.pipeline();
                SecurityConfig config = env.securityConfig();
                if (config.tlsEnabled()) {
                    try {
                        pipeline.addFirst(SslHandlerFactory.get(ch.alloc(), config, endpointContext));
                    } catch (Exception e) {
                        throw new SecurityException("Could not instantiate SSL Handler", e);
                    }
                }
                if (env.ioConfig().servicesToCapture().contains(serviceType)) {
                    pipeline.addLast(new TrafficCaptureHandler(endpointContext));
                }
                pipelineInitializer().init(BaseEndpoint.this, pipeline);
                pipeline.addLast(new PipelineErrorHandler(BaseEndpoint.this));
            }
        });
        if (env.ioConfig().tcpKeepAlivesEnabled() && !(eventLoopGroup instanceof DefaultEventLoopGroup)) {
            channelBootstrap.option(ChannelOption.SO_KEEPALIVE, true);
            if (eventLoopGroup instanceof EpollEventLoopGroup) {
                channelBootstrap.option(EpollChannelOption.TCP_KEEPIDLE, (int) TimeUnit.MILLISECONDS.toSeconds(env.ioConfig().tcpKeepAliveTime().toMillis()));
            }
        }
        state.transition(EndpointState.CONNECTING);
        attemptStart.set(System.nanoTime());
        return channelFutureIntoMono(channelBootstrap.connect());
    }).timeout(endpointContext.environment().timeoutConfig().connectTimeout()).onErrorResume(throwable -> {
        state.transition(EndpointState.DISCONNECTED);
        if (disconnect.get()) {
            endpointContext.environment().eventBus().publish(new EndpointConnectionAbortedEvent(Duration.ofNanos(System.nanoTime() - attemptStart.get()), endpointContext, ConnectTimings.toMap(channel)));
            return Mono.empty();
        } else {
            return Mono.error(throwable);
        }
    }).retryWhen(Retry.any().exponentialBackoff(Duration.ofMillis(32), Duration.ofMillis(4096)).retryMax(Long.MAX_VALUE).doOnRetry(retryContext -> {
        Throwable ex = retryContext.exception();
        // We drop the severity for the BucketNotFoundException because it shows up when
        // bootstrapping against MDS clusters and nodes with no kv service enabled on it
        // that is bucket aware. If a bucket really does not exist we'll get an auth
        // exception instead.
        Event.Severity severity = ex instanceof BucketNotFoundException ? Event.Severity.DEBUG : Event.Severity.WARN;
        Duration duration = ex instanceof TimeoutException ? endpointContext.environment().timeoutConfig().connectTimeout() : Duration.ofNanos(System.nanoTime() - attemptStart.get());
        ex = annotateConnectException(ex);
        endpointContext.environment().eventBus().publish(new EndpointConnectionFailedEvent(severity, duration, endpointContext, retryContext.iteration(), trimNettyFromStackTrace(ex)));
    }).toReactorRetry()).subscribe(channel -> {
        long now = System.nanoTime();
        if (disconnect.get()) {
            this.channel = null;
            endpointContext.environment().eventBus().publish(new EndpointConnectionIgnoredEvent(Duration.ofNanos(now - attemptStart.get()), endpointContext, ConnectTimings.toMap(channel)));
            closeChannel(channel);
        } else {
            this.channel = channel;
            Optional<HostAndPort> localSocket = Optional.empty();
            if (channel.localAddress() instanceof InetSocketAddress) {
                // it will always be an inet socket address, but to safeguard for testing mocks...
                InetSocketAddress so = (InetSocketAddress) channel.localAddress();
                localSocket = Optional.of(new HostAndPort(so.getHostString(), so.getPort()));
            }
            EndpointContext newContext = new EndpointContext(endpointContext, endpointContext.remoteSocket(), endpointContext.circuitBreaker(), endpointContext.serviceType(), localSocket, endpointContext.bucket(), Optional.ofNullable(channel.attr(ChannelAttributes.CHANNEL_ID_KEY).get()));
            this.endpointContext.get().environment().eventBus().publish(new EndpointConnectedEvent(Duration.ofNanos(now - attemptStart.get()), newContext, ConnectTimings.toMap(channel)));
            this.endpointContext.set(newContext);
            this.circuitBreaker.reset();
            lastConnectedAt = now;
            state.transition(EndpointState.CONNECTED);
        }
    }, error -> endpointContext.environment().eventBus().publish(new UnexpectedEndpointConnectionFailedEvent(Duration.ofNanos(System.nanoTime() - attemptStart.get()), endpointContext, error)));
}

Example 5 with EndpointConnectedEvent

use of com.couchbase.client.core.cnc.events.endpoint.EndpointConnectedEvent in project couchbase-jvm-clients by couchbase.

the class BaseEndpointTest method emitsEventOnFailedDisconnect.

/**
 * If the disconnect failed for some reason, make sure the proper warning event
 * is raised and captured.
 */
@Test
void emitsEventOnFailedDisconnect() {
    final Throwable expectedCause = new Exception("something failed");
    EmbeddedChannel channel = new EmbeddedChannel(new ChannelOutboundHandlerAdapter() {

        @Override
        public void close(ChannelHandlerContext ctx, ChannelPromise promise) {
            promise.tryFailure(expectedCause);
        }
    });
    InstrumentedEndpoint endpoint = connectSuccessfully(channel);
    endpoint.disconnect();
    waitUntilCondition(() -> endpoint.state() == EndpointState.DISCONNECTED);
    assertEquals(2, eventBus.publishedEvents().size());
    assertTrue(eventBus.publishedEvents().get(0) instanceof EndpointConnectedEvent);
    EndpointDisconnectionFailedEvent event = (EndpointDisconnectionFailedEvent) eventBus.publishedEvents().get(1);
    assertEquals(expectedCause, event.cause());
    assertEquals(Event.Severity.WARN, event.severity());
}