Examples with ConcurrentLinkedQueue java.util.concurrent.ConcurrentLinkedQueue used on opensource projects

Example 66 with ConcurrentLinkedQueue

use of java.util.concurrent.ConcurrentLinkedQueue in project mapdb by jankotek.

the class ConcurrentLinkedQueueTest method testRetainAll.

/**
     * retainAll(c) retains only those elements of c and reports true if change
     */
public void testRetainAll() {
    ConcurrentLinkedQueue q = populatedQueue(SIZE);
    ConcurrentLinkedQueue p = populatedQueue(SIZE);
    for (int i = 0; i < SIZE; ++i) {
        boolean changed = q.retainAll(p);
        if (i == 0)
            assertFalse(changed);
        else
            assertTrue(changed);
        assertTrue(q.containsAll(p));
        assertEquals(SIZE - i, q.size());
        p.remove();
    }
}

Example 67 with ConcurrentLinkedQueue

use of java.util.concurrent.ConcurrentLinkedQueue in project jersey by jersey.

the class ItemStoreResourceITCase method testItemsStore.

/**
     * Test the item addition, addition event broadcasting and item retrieval from {@link ItemStoreResource}.
     *
     * @throws Exception in case of a test failure.
     */
@Test
public void testItemsStore() throws Exception {
    final List<String> items = Collections.unmodifiableList(Arrays.asList("foo", "bar", "baz"));
    final WebTarget itemsTarget = target("items");
    // countdown on all events
    final CountDownLatch latch = new CountDownLatch(items.size() * MAX_LISTENERS * 2);
    final List<Queue<Integer>> indexQueues = new ArrayList<Queue<Integer>>(MAX_LISTENERS);
    final EventSource[] sources = new EventSource[MAX_LISTENERS];
    final AtomicInteger sizeEventsCount = new AtomicInteger(0);
    for (int i = 0; i < MAX_LISTENERS; i++) {
        final int id = i;
        final EventSource es = EventSource.target(itemsTarget.path("events")).named("SOURCE " + id).build();
        sources[id] = es;
        final Queue<Integer> indexes = new ConcurrentLinkedQueue<Integer>();
        indexQueues.add(indexes);
        es.register(new EventListener() {

            @Override
            @SuppressWarnings("MagicNumber")
            public void onEvent(InboundEvent inboundEvent) {
                try {
                    if (inboundEvent.getName() == null) {
                        final String data = inboundEvent.readData();
                        LOGGER.info("[-i-] SOURCE " + id + ": Received event id=" + inboundEvent.getId() + " data=" + data);
                        indexes.add(items.indexOf(data));
                    } else if ("size".equals(inboundEvent.getName())) {
                        sizeEventsCount.incrementAndGet();
                    }
                } catch (ProcessingException ex) {
                    LOGGER.log(Level.SEVERE, "[-x-] SOURCE " + id + ": Error getting event data.", ex);
                    indexes.add(-999);
                } finally {
                    latch.countDown();
                }
            }
        });
    }
    try {
        open(sources);
        for (String item : items) {
            postItem(itemsTarget, item);
        }
        assertTrue("Waiting to receive all events has timed out.", latch.await((1000 + MAX_LISTENERS * EventSource.RECONNECT_DEFAULT) * getAsyncTimeoutMultiplier(), TimeUnit.MILLISECONDS));
        // need to force disconnect on server in order for EventSource.close(...) to succeed with HttpUrlConnection
        sendCommand(itemsTarget, "disconnect");
    } finally {
        close(sources);
    }
    String postedItems = itemsTarget.request().get(String.class);
    for (String item : items) {
        assertTrue("Item '" + item + "' not stored on server.", postedItems.contains(item));
    }
    int queueId = 0;
    for (Queue<Integer> indexes : indexQueues) {
        for (int i = 0; i < items.size(); i++) {
            assertTrue("Event for '" + items.get(i) + "' not received in queue " + queueId, indexes.contains(i));
        }
        assertEquals("Not received the expected number of events in queue " + queueId, items.size(), indexes.size());
        queueId++;
    }
    assertEquals("Number of received 'size' events does not match.", items.size() * MAX_LISTENERS, sizeEventsCount.get());
}

Example 68 with ConcurrentLinkedQueue

use of java.util.concurrent.ConcurrentLinkedQueue in project jersey by jersey.

the class AsyncAgentResource method async.

@GET
@ManagedAsync
public void async(@Suspended final AsyncResponse async) {
    final long time = System.nanoTime();
    final AgentResponse response = new AgentResponse();
    final CountDownLatch outerLatch = new CountDownLatch(2);
    final Queue<String> errors = new ConcurrentLinkedQueue<>();
    // Obtain visited destinations.
    destination.path("visited").request().header("Rx-User", "Async").async().get(new InvocationCallback<List<Destination>>() {

        @Override
        public void completed(final List<Destination> destinations) {
            response.setVisited(destinations);
            outerLatch.countDown();
        }

        @Override
        public void failed(final Throwable throwable) {
            errors.offer("Visited: " + throwable.getMessage());
            outerLatch.countDown();
        }
    });
    // Obtain recommended destinations. (does not depend on visited ones)
    destination.path("recommended").request().header("Rx-User", "Async").async().get(new InvocationCallback<List<Destination>>() {

        @Override
        public void completed(final List<Destination> recommended) {
            final CountDownLatch innerLatch = new CountDownLatch(recommended.size() * 2);
            // Forecasts. (depend on recommended destinations)
            final Map<String, Forecast> forecasts = Collections.synchronizedMap(new HashMap<>());
            for (final Destination dest : recommended) {
                forecast.resolveTemplate("destination", dest.getDestination()).request().async().get(new InvocationCallback<Forecast>() {

                    @Override
                    public void completed(final Forecast forecast) {
                        forecasts.put(dest.getDestination(), forecast);
                        innerLatch.countDown();
                    }

                    @Override
                    public void failed(final Throwable throwable) {
                        errors.offer("Forecast: " + throwable.getMessage());
                        innerLatch.countDown();
                    }
                });
            }
            // Calculations. (depend on recommended destinations)
            final List<Future<Calculation>> futures = recommended.stream().map(dest -> calculation.resolveTemplate("from", "Moon").resolveTemplate("to", dest.getDestination()).request().async().get(Calculation.class)).collect(Collectors.toList());
            final Map<String, Calculation> calculations = new HashMap<>();
            while (!futures.isEmpty()) {
                final Iterator<Future<Calculation>> iterator = futures.iterator();
                while (iterator.hasNext()) {
                    final Future<Calculation> f = iterator.next();
                    if (f.isDone()) {
                        try {
                            final Calculation calculation = f.get();
                            calculations.put(calculation.getTo(), calculation);
                            innerLatch.countDown();
                        } catch (final Throwable t) {
                            errors.offer("Calculation: " + t.getMessage());
                            innerLatch.countDown();
                        } finally {
                            iterator.remove();
                        }
                    }
                }
            }
            // Have to wait here for dependent requests ...
            try {
                if (!innerLatch.await(10, TimeUnit.SECONDS)) {
                    errors.offer("Inner: Waiting for requests to complete has timed out.");
                }
            } catch (final InterruptedException e) {
                errors.offer("Inner: Waiting for requests to complete has been interrupted.");
            }
            // Recommendations.
            final List<Recommendation> recommendations = new ArrayList<>(recommended.size());
            for (final Destination dest : recommended) {
                final Forecast fore = forecasts.get(dest.getDestination());
                final Calculation calc = calculations.get(dest.getDestination());
                recommendations.add(new Recommendation(dest.getDestination(), fore != null ? fore.getForecast() : "N/A", calc != null ? calc.getPrice() : -1));
            }
            response.setRecommended(recommendations);
            outerLatch.countDown();
        }

        @Override
        public void failed(final Throwable throwable) {
            errors.offer("Recommended: " + throwable.getMessage());
            outerLatch.countDown();
        }
    });
    // ... and have to wait also here for independent requests.
    try {
        if (!outerLatch.await(10, TimeUnit.SECONDS)) {
            errors.offer("Outer: Waiting for requests to complete has timed out.");
        }
    } catch (final InterruptedException e) {
        errors.offer("Outer: Waiting for requests to complete has been interrupted.");
    }
    // Do something with errors.
    // ...
    response.setProcessingTime((System.nanoTime() - time) / 1000000);
    async.resume(response);
}

Example 69 with ConcurrentLinkedQueue

use of java.util.concurrent.ConcurrentLinkedQueue in project jersey by jersey.

the class ObservableAgentResource method observable.

@GET
public void observable(@Suspended final AsyncResponse async) {
    final long time = System.nanoTime();
    final Queue<String> errors = new ConcurrentLinkedQueue<>();
    Observable.just(new AgentResponse()).zipWith(visited(errors), (response, visited) -> {
        response.setVisited(visited);
        return response;
    }).zipWith(recommended(errors), (response, recommendations) -> {
        response.setRecommended(recommendations);
        return response;
    }).observeOn(Schedulers.io()).subscribe(response -> {
        response.setProcessingTime((System.nanoTime() - time) / 1000000);
        async.resume(response);
    }, async::resume);
}

Example 70 with ConcurrentLinkedQueue

use of java.util.concurrent.ConcurrentLinkedQueue in project jersey by jersey.

the class SyncAgentResource method sync.

@GET
public AgentResponse sync() {
    final long time = System.nanoTime();
    final AgentResponse response = new AgentResponse();
    final Queue<String> errors = new ConcurrentLinkedQueue<>();
    // Obtain visited destinations.
    try {
        response.setVisited(destination.path("visited").request().header("Rx-User", "Sync").get(new GenericType<List<Destination>>() {
        }));
    } catch (final Throwable throwable) {
        errors.offer("Visited: " + throwable.getMessage());
    }
    // Obtain recommended destinations. (does not depend on visited ones)
    List<Destination> recommended = Collections.emptyList();
    try {
        recommended = destination.path("recommended").request().header("Rx-User", "Sync").get(new GenericType<List<Destination>>() {
        });
    } catch (final Throwable throwable) {
        errors.offer("Recommended: " + throwable.getMessage());
    }
    // Forecasts. (depend on recommended destinations)
    final Map<String, Forecast> forecasts = new HashMap<>();
    for (final Destination dest : recommended) {
        try {
            forecasts.put(dest.getDestination(), forecast.resolveTemplate("destination", dest.getDestination()).request().get(Forecast.class));
        } catch (final Throwable throwable) {
            errors.offer("Forecast: " + throwable.getMessage());
        }
    }
    // Calculations. (depend on recommended destinations)
    final Map<String, Calculation> calculations = new HashMap<>();
    recommended.stream().forEach(destination -> {
        try {
            calculations.put(destination.getDestination(), calculation.resolveTemplate("from", "Moon").resolveTemplate("to", destination.getDestination()).request().get(Calculation.class));
        } catch (final Throwable throwable) {
            errors.offer("Calculation: " + throwable.getMessage());
        }
    });
    // Recommendations.
    final List<Recommendation> recommendations = new ArrayList<>(recommended.size());
    for (final Destination dest : recommended) {
        final Forecast fore = forecasts.get(dest.getDestination());
        final Calculation calc = calculations.get(dest.getDestination());
        recommendations.add(new Recommendation(dest.getDestination(), fore != null ? fore.getForecast() : "N/A", calc != null ? calc.getPrice() : -1));
    }
    // Do something with errors.
    // ...
    response.setRecommended(recommendations);
    response.setProcessingTime((System.nanoTime() - time) / 1000000);
    return response;
}