Java Code Examples for javax.ws.rs.container.AsyncResponse#register()

void doBind(final AsyncResponse response, final AsyncFuture<?> callback) {
    response.setTimeoutHandler(asyncResponse -> {
        log.debug("client timed out");
        callback.cancel();
    });

    response.register((CompletionCallback) throwable -> {
        log.debug("client completed");
        callback.cancel();
    });

    response.register((ConnectionCallback) disconnected -> {
        log.debug("client disconnected");
        callback.cancel();
    });
}
 

@GET
@Path("/disconnect")
public void handleClientDisconnects(@Suspended AsyncResponse response) {
    response.setTimeout(0, TimeUnit.SECONDS);

    response.register(new ConnectionCallback() {
        @Override
        public void onDisconnect(AsyncResponse disconnected) {
            System.out.println("ConnectionCallback: onDisconnect, client disconnects");
        }
    });

    try {
        Thread.sleep(3000);
    } catch (InterruptedException ex) {
        // ignore
    }

    response.resume(books.values().toString());
}
 

@GET
@Path("books/notfound")
@Produces("text/plain")
public void handleContinuationRequestNotFound(@Suspended AsyncResponse response) {
    response.register(new CallbackImpl());
    resumeSuspendedNotFound(response);
}
 

@GET
@Path("books/notfound/unmapped")
@Produces("text/plain")
public void handleContinuationRequestNotFoundUnmapped(@Suspended AsyncResponse response) {
    response.register(new CallbackImpl());
    resumeSuspendedNotFoundUnmapped(response);
}
 

@GET
@Path("books/unmappedFromFilter")
@Produces("text/plain")
public void handleContinuationRequestUnmappedFromFilter(@Suspended AsyncResponse response) {
    response.register(new CallbackImpl());
    response.resume(Response.ok().build());
}
 

@ResourceSecurity(INTERNAL_ONLY)
@GET
@Path("{taskId}/results/{bufferId}/{token}")
@Produces(PRESTO_PAGES)
public void getResults(
        @PathParam("taskId") TaskId taskId,
        @PathParam("bufferId") OutputBufferId bufferId,
        @PathParam("token") final long token,
        @HeaderParam(PRESTO_MAX_SIZE) DataSize maxSize,
        @Suspended AsyncResponse asyncResponse)
{
    requireNonNull(taskId, "taskId is null");
    requireNonNull(bufferId, "bufferId is null");

    long start = System.nanoTime();
    ListenableFuture<BufferResult> bufferResultFuture = taskManager.getTaskResults(taskId, bufferId, token, maxSize);
    Duration waitTime = randomizeWaitTime(DEFAULT_MAX_WAIT_TIME);
    bufferResultFuture = addTimeout(
            bufferResultFuture,
            () -> BufferResult.emptyResults(taskManager.getTaskInstanceId(taskId), token, false),
            waitTime,
            timeoutExecutor);

    ListenableFuture<Response> responseFuture = Futures.transform(bufferResultFuture, result -> {
        List<SerializedPage> serializedPages = result.getSerializedPages();

        GenericEntity<?> entity = null;
        Status status;
        if (serializedPages.isEmpty()) {
            status = Status.NO_CONTENT;
        }
        else {
            entity = new GenericEntity<>(serializedPages, new TypeToken<List<SerializedPage>>() {}.getType());
            status = Status.OK;
        }

        return Response.status(status)
                .entity(entity)
                .header(PRESTO_TASK_INSTANCE_ID, result.getTaskInstanceId())
                .header(PRESTO_PAGE_TOKEN, result.getToken())
                .header(PRESTO_PAGE_NEXT_TOKEN, result.getNextToken())
                .header(PRESTO_BUFFER_COMPLETE, result.isBufferComplete())
                .build();
    }, directExecutor());

    // For hard timeout, add an additional time to max wait for thread scheduling contention and GC
    Duration timeout = new Duration(waitTime.toMillis() + ADDITIONAL_WAIT_TIME.toMillis(), MILLISECONDS);
    bindAsyncResponse(asyncResponse, responseFuture, responseExecutor)
            .withTimeout(timeout,
                    Response.status(Status.NO_CONTENT)
                            .header(PRESTO_TASK_INSTANCE_ID, taskManager.getTaskInstanceId(taskId))
                            .header(PRESTO_PAGE_TOKEN, token)
                            .header(PRESTO_PAGE_NEXT_TOKEN, token)
                            .header(PRESTO_BUFFER_COMPLETE, false)
                            .build());

    responseFuture.addListener(() -> readFromOutputBufferTime.add(Duration.nanosSince(start)), directExecutor());
    asyncResponse.register((CompletionCallback) throwable -> resultsRequestTime.add(Duration.nanosSince(start)));
}
 

@GET
@Path("/books/defaulttimeout")
public void getBookDescriptionWithTimeout(@Suspended AsyncResponse async) {
    async.register(new CallbackImpl());
    async.setTimeout(2000, TimeUnit.MILLISECONDS);
}
 

private void poll(final long timeout,
                  final String deviceId,
                  final String networkIdsCsv,
                  final String deviceTypeIdsCsv,
                  final String namesCsv,
                  final String timestamp,
                  final AsyncResponse asyncResponse) throws InterruptedException {
    final HiveAuthentication authentication = (HiveAuthentication) SecurityContextHolder.getContext().getAuthentication();

    final Date ts = Optional.ofNullable(timestamp).map(TimestampQueryParamParser::parse)
            .orElse(timestampService.getDate());
    
    final Response response = ResponseFactory.response(
            Response.Status.OK,
            Collections.emptyList(),
            JsonPolicyDef.Policy.NOTIFICATION_TO_CLIENT);

    asyncResponse.setTimeoutHandler(asyncRes -> asyncRes.resume(response));

    Set<String> names = Optional.ofNullable(StringUtils.split(namesCsv, ','))
            .map(Arrays::asList)
            .map(list -> list.stream().collect(Collectors.toSet()))
            .orElse(null);
    Set<Long> networks = Optional.ofNullable(StringUtils.split(networkIdsCsv, ','))
            .map(Arrays::asList)
            .map(list -> list.stream()
                    .map(n -> gson.fromJson(n, Long.class))
                    .collect(Collectors.toSet())
            ).orElse(null);
    Set<Long> deviceTypes = Optional.ofNullable(StringUtils.split(deviceTypeIdsCsv, ','))
            .map(Arrays::asList)
            .map(list -> list.stream()
                    .map(dt -> gson.fromJson(dt, Long.class))
                    .collect(Collectors.toSet())
            ).orElse(null);

    BiConsumer<DeviceNotification, Long> callback = (notification, subscriptionId) -> {
        if (!asyncResponse.isDone()) {
            asyncResponse.resume(ResponseFactory.response(
                    Response.Status.OK,
                    Collections.singleton(notification),
                    JsonPolicyDef.Policy.NOTIFICATION_TO_CLIENT));
        }
    };

    Set<Filter> filters = filterService.getFilterList(deviceId, networks, deviceTypes, NOTIFICATION_EVENT.name(), names, authentication);

    if (!filters.isEmpty()) {
        Pair<Long, CompletableFuture<List<DeviceNotification>>> pair = notificationService
                .subscribe(filters, names, ts, callback);
        pair.getRight().thenAccept(collection -> {
            if (!collection.isEmpty() && !asyncResponse.isDone()) {
                asyncResponse.resume(ResponseFactory.response(
                        Response.Status.OK,
                        collection,
                        JsonPolicyDef.Policy.NOTIFICATION_TO_CLIENT));
            }

            if (timeout == 0) {
                asyncResponse.setTimeout(1, TimeUnit.MILLISECONDS); // setting timeout to 0 would cause
                // the thread to suspend indefinitely, see AsyncResponse docs
            } else {
                asyncResponse.setTimeout(timeout, TimeUnit.SECONDS);
            }
        });

        asyncResponse.register((CompletionCallback) throwable -> notificationService.unsubscribe(Collections.singleton(pair.getLeft())));
    } else {
        if (!asyncResponse.isDone()) {
            asyncResponse.resume(response);
        }
    }
}
 

private void poll(final long timeout,
                  final String deviceId,
                  final String networkIdsCsv,
                  final String deviceTypeIdsCsv,
                  final String namesCsv,
                  final String timestamp,
                  final boolean returnUpdated,
                  final Integer limit,
                  final AsyncResponse asyncResponse) throws InterruptedException {
    final HiveAuthentication authentication = (HiveAuthentication) SecurityContextHolder.getContext().getAuthentication();

    final Date ts = Optional.ofNullable(timestamp).map(TimestampQueryParamParser::parse)
            .orElse(timestampService.getDate());

    final Response response = ResponseFactory.response(
            OK,
            Collections.emptyList(),
            Policy.COMMAND_LISTED);

    asyncResponse.setTimeoutHandler(asyncRes -> asyncRes.resume(response));

    Set<String> names = Optional.ofNullable(StringUtils.split(namesCsv, ','))
            .map(Arrays::asList)
            .map(list -> list.stream().collect(Collectors.toSet()))
            .orElse(null);
    Set<Long> networks = Optional.ofNullable(StringUtils.split(networkIdsCsv, ','))
            .map(Arrays::asList)
            .map(list -> list.stream()
                    .map(n -> gson.fromJson(n, Long.class))
                    .collect(Collectors.toSet())
            ).orElse(null);
    Set<Long> deviceTypes = Optional.ofNullable(StringUtils.split(deviceTypeIdsCsv, ','))
            .map(Arrays::asList)
            .map(list -> list.stream()
                    .map(dt -> gson.fromJson(dt, Long.class))
                    .collect(Collectors.toSet())
            ).orElse(null);

    BiConsumer<DeviceCommand, Long> callback = (command, subscriptionId) -> {
        if (!asyncResponse.isDone()) {
            asyncResponse.resume(ResponseFactory.response(
                    OK,
                    Collections.singleton(command),
                    Policy.COMMAND_LISTED));
        }
    };

    Set<Filter> filters = filterService.getFilterList(deviceId, networks, deviceTypes, COMMAND_EVENT.name(), names, authentication);

    if (!filters.isEmpty()) {
        Pair<Long, CompletableFuture<List<DeviceCommand>>> pair = commandService
                .sendSubscribeRequest(filters, names, ts, returnUpdated, limit, callback);
        pair.getRight().thenAccept(collection -> {
            if (!collection.isEmpty() && !asyncResponse.isDone()) {
                asyncResponse.resume(ResponseFactory.response(
                        OK,
                        collection,
                        Policy.COMMAND_LISTED));
            }

            if (timeout == 0) {
                asyncResponse.setTimeout(1, TimeUnit.MILLISECONDS); // setting timeout to 0 would cause
                // the thread to suspend indefinitely, see AsyncResponse docs
            } else {
                asyncResponse.setTimeout(timeout, TimeUnit.SECONDS);
            }
        });

        asyncResponse.register((CompletionCallback) throwable -> commandService.sendUnsubscribeRequest(Collections.singleton(pair.getLeft())));
    } else {
        if (!asyncResponse.isDone()) {
            asyncResponse.resume(response);
        }
    }

}
 

private void waitForCommand(DeviceVO device, final String commandId, final long timeout,
        DeviceCommand command, final AsyncResponse asyncResponse) {
    String deviceId = device.getDeviceId();
    

    if (!command.getDeviceId().equals(device.getDeviceId())) {
        logger.warn("DeviceCommand wait request failed. BAD REQUEST: Command with id = {} was not sent for device with id = {}",
                commandId, deviceId);
        asyncResponse.resume(ResponseFactory.response(BAD_REQUEST));
        return;
    }

    BiConsumer<DeviceCommand, Long> callback = (com, subscriptionId) -> {
        if (!asyncResponse.isDone()) {
            asyncResponse.resume(ResponseFactory.response(
                    OK,
                    com,
                    COMMAND_TO_DEVICE));
        }
    };

    if (!command.getIsUpdated()) {
        CompletableFuture<Pair<Long, DeviceCommand>> future = commandService
                .sendSubscribeToUpdateRequest(Long.valueOf(commandId), device, callback);
        future.thenAccept(pair -> {
            final DeviceCommand deviceCommand = pair.getRight();
            if (!asyncResponse.isDone() && deviceCommand.getIsUpdated()) {
                asyncResponse.resume(ResponseFactory.response(
                        OK,
                        deviceCommand,
                        COMMAND_TO_DEVICE));
            }

            if (timeout == 0) {
                asyncResponse.setTimeout(1, TimeUnit.MILLISECONDS); // setting timeout to 0 would cause
                // the thread to suspend indefinitely, see AsyncResponse docs
            } else {
                asyncResponse.setTimeout(timeout, TimeUnit.SECONDS);
            }
        });
        asyncResponse.register((CompletionCallback) throwable -> {
            try {
                commandService.sendUnsubscribeRequest(Collections.singleton(future.get().getLeft()));
            } catch (InterruptedException | ExecutionException e) {
                if (!asyncResponse.isDone()) {
                    asyncResponse.resume(ResponseFactory.response(INTERNAL_SERVER_ERROR));
                }
            }
        });
    } else {
        if (!asyncResponse.isDone()) {
            asyncResponse.resume(ResponseFactory.response(OK, command, COMMAND_TO_DEVICE));
        }
    }
}