Examples with Cancellable com.linkedin.r2.util.Cancellable used on opensource projects

Example 6 with Cancellable

use of com.linkedin.r2.util.Cancellable in project rest.li by linkedin.

the class TestAsyncSharedPoolImpl method testGetWithNoWaiter.

@Test(expectedExceptions = ExecutionException.class)
public void testGetWithNoWaiter() throws Exception {
    AsyncSharedPoolImpl<Object> pool = new AsyncSharedPoolImpl<>(POOL_NAME, LIFECYCLE, SCHEDULER, LIMITER, NO_POOL_TIMEOUT, NO_WAITER);
    pool.start();
    FutureCallback<Object> callback = new FutureCallback<>();
    Cancellable cancellable = pool.get(callback);
    Assert.assertNotNull(cancellable);
    Assert.assertFalse(cancellable.cancel());
    callback.get(GET_TIMEOUT, TIME_UNIT);
}

Example 7 with Cancellable

use of com.linkedin.r2.util.Cancellable in project rest.li by linkedin.

the class Http2NettyStreamClient method doWriteRequest.

@Override
protected void doWriteRequest(Request request, final RequestContext context, SocketAddress address, TimeoutTransportCallback<StreamResponse> callback) {
    final AsyncPool<Channel> pool;
    try {
        pool = _channelPoolManager.getPoolForAddress(address);
    } catch (IllegalStateException e) {
        errorResponse(callback, e);
        return;
    }
    context.putLocalAttr(R2Constants.HTTP_PROTOCOL_VERSION, HttpProtocolVersion.HTTP_2);
    Callback<Channel> getCallback = new ChannelPoolGetCallback(pool, request, callback);
    final Cancellable pendingGet = pool.get(getCallback);
    if (pendingGet != null) {
        callback.addTimeoutTask(() -> pendingGet.cancel());
    }
}

Example 8 with Cancellable

use of com.linkedin.r2.util.Cancellable in project rest.li by linkedin.

the class HttpNettyClient method writeRequest.

private void writeRequest(RestRequest request, RequestContext requestContext, Map<String, String> wireAttrs, final TimeoutTransportCallback<RestResponse> callback) {
    State state = _state.get();
    if (state != State.RUNNING) {
        errorResponse(callback, new IllegalStateException("Client is " + state));
        return;
    }
    URI uri = request.getURI();
    String scheme = uri.getScheme();
    if (!"http".equalsIgnoreCase(scheme) && !"https".equalsIgnoreCase(scheme)) {
        errorResponse(callback, new IllegalArgumentException("Unknown scheme: " + scheme + " (only http/https is supported)"));
        return;
    }
    String host = uri.getHost();
    int port = uri.getPort();
    if (port == -1) {
        port = "http".equalsIgnoreCase(scheme) ? HTTP_DEFAULT_PORT : HTTPS_DEFAULT_PORT;
    }
    final RestRequest newRequest = new RestRequestBuilder(request).overwriteHeaders(WireAttributeHelper.toWireAttributes(wireAttrs)).build();
    final SocketAddress address;
    try {
        // TODO investigate DNS resolution and timing
        InetAddress inetAddress = InetAddress.getByName(host);
        address = new InetSocketAddress(inetAddress, port);
        requestContext.putLocalAttr(R2Constants.REMOTE_SERVER_ADDR, inetAddress.getHostAddress());
    } catch (UnknownHostException e) {
        errorResponse(callback, e);
        return;
    }
    requestContext.putLocalAttr(R2Constants.HTTP_PROTOCOL_VERSION, HttpProtocolVersion.HTTP_1_1);
    final AsyncPool<Channel> pool;
    try {
        pool = _channelPoolManager.getPoolForAddress(address);
    } catch (IllegalStateException e) {
        errorResponse(callback, e);
        return;
    }
    final Cancellable pendingGet = pool.get(new Callback<Channel>() {

        @Override
        public void onSuccess(final Channel channel) {
            // This handler ensures the channel is returned to the pool at the end of the
            // Netty pipeline.
            channel.attr(ChannelPoolHandler.CHANNEL_POOL_ATTR_KEY).set(pool);
            callback.addTimeoutTask(new Runnable() {

                @Override
                public void run() {
                    AsyncPool<Channel> pool = channel.attr(ChannelPoolHandler.CHANNEL_POOL_ATTR_KEY).getAndRemove();
                    if (pool != null) {
                        pool.dispose(channel);
                    }
                }
            });
            // This handler invokes the callback with the response once it arrives.
            channel.attr(RAPResponseHandler.CALLBACK_ATTR_KEY).set(callback);
            final State state = _state.get();
            if (state == State.REQUESTS_STOPPING || state == State.SHUTDOWN) {
                // In this case, we acquired a channel from the pool as request processing is halting.
                // The shutdown task might not timeout this callback, since it may already have scanned
                // all the channels for pending requests before we set the callback as the channel
                // attachment.  The TimeoutTransportCallback ensures the user callback in never
                // invoked more than once, so it is safe to invoke it unconditionally.
                errorResponse(callback, new TimeoutException("Operation did not complete before shutdown"));
                return;
            }
            // here we want the exception in outbound operations to be passed back through pipeline so that
            // the user callback would be invoked with the exception and the channel can be put back into the pool
            channel.writeAndFlush(newRequest).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
        }

        @Override
        public void onError(Throwable e) {
            errorResponse(callback, e);
        }
    });
    if (pendingGet != null) {
        callback.addTimeoutTask(new Runnable() {

            @Override
            public void run() {
                pendingGet.cancel();
            }
        });
    }
}

Example 9 with Cancellable

use of com.linkedin.r2.util.Cancellable in project rest.li by linkedin.

the class HttpNettyStreamClient method doWriteRequest.

@Override
protected void doWriteRequest(Request request, RequestContext context, SocketAddress address, TimeoutTransportCallback<StreamResponse> callback) {
    final AsyncPool<Channel> pool;
    try {
        pool = _channelPoolManager.getPoolForAddress(address);
    } catch (IllegalStateException e) {
        errorResponse(callback, e);
        return;
    }
    context.putLocalAttr(R2Constants.HTTP_PROTOCOL_VERSION, HttpProtocolVersion.HTTP_1_1);
    Callback<Channel> getCallback = new ChannelPoolGetCallback(pool, request, callback);
    final Cancellable pendingGet = pool.get(getCallback);
    if (pendingGet != null) {
        callback.addTimeoutTask(() -> pendingGet.cancel());
    }
}

Example 10 with Cancellable

use of com.linkedin.r2.util.Cancellable in project rest.li by linkedin.

the class TestAsyncSharedPoolImpl method testMixedPutAndDisposeItemSucceeds.

@Test
public void testMixedPutAndDisposeItemSucceeds() throws Exception {
    AsyncSharedPoolImpl<Object> pool = new AsyncSharedPoolImpl<>(POOL_NAME, LIFECYCLE, SCHEDULER, LIMITER, NO_POOL_TIMEOUT, MAX_WAITERS);
    pool.start();
    final List<Object> items = new ArrayList<>(GET_COUNT);
    for (int i = 0; i < GET_COUNT; i++) {
        FutureCallback<Object> getCallback = new FutureCallback<>();
        Cancellable cancellable = pool.get(getCallback);
        // Operation should not be cancellable
        Assert.assertNotNull(cancellable);
        Assert.assertEquals(cancellable.cancel(), false);
        Object item = getCallback.get(GET_TIMEOUT, TIME_UNIT);
        Assert.assertNotNull(item);
        items.add(item);
    }
    // All items should essentially be the same instance
    Assert.assertEquals(items.size(), GET_COUNT);
    items.stream().forEach(item -> Assert.assertSame(item, items.get(0)));
    verifyStats(pool.getStats(), 1, GET_COUNT, 0, 0, 0, 0, 1, 0, 0);
    FutureCallback<None> shutdownCallback = new FutureCallback<>();
    pool.shutdown(shutdownCallback);
    // Put items back to the pool
    IntStream.range(0, GET_COUNT).forEach(i -> {
        if (i % 2 == 0) {
            pool.put(items.get(i));
        } else {
            pool.dispose(items.get(i));
        }
    });
    shutdownCallback.get(SHUTDOWN_TIMEOUT, TIME_UNIT);
}