Examples with RequestHandler mantis.io.reactivex.netty.protocol.http.server.RequestHandler used on opensource projects

Example 1 with RequestHandler

use of mantis.io.reactivex.netty.protocol.http.server.RequestHandler in project mantis by Netflix.

the class TestSseServerFactory method newServerWithInitialData.

public static int newServerWithInitialData(final int port, final String data) {
    final HttpServer<String, ServerSentEvent> server = RxNetty.newHttpServerBuilder(port, new RequestHandler<String, ServerSentEvent>() {

        @Override
        public Observable<Void> handle(HttpServerRequest<String> req, HttpServerResponse<ServerSentEvent> resp) {
            final ByteBuf byteBuf = resp.getAllocator().buffer().writeBytes(data.getBytes());
            resp.writeAndFlush(new ServerSentEvent(byteBuf));
            return Observable.empty();
        }
    }).pipelineConfigurator(PipelineConfigurators.<String>serveSseConfigurator()).channelOption(ChannelOption.WRITE_BUFFER_WATER_MARK, new WriteBufferWaterMark(1024 * 1024, 5 * 1024 * 1024)).build();
    server.start();
    synchronized (servers) {
        servers.add(server);
    }
    return port;
}

Example 2 with RequestHandler

use of mantis.io.reactivex.netty.protocol.http.server.RequestHandler in project mantis by Netflix.

the class PushServerSse method createServer.

@Override
public RxServer<?, ?> createServer() {
    RxServer<HttpServerRequest<String>, HttpServerResponse<ServerSentEvent>> server = RxNetty.newHttpServerBuilder(port, new RequestHandler<String, ServerSentEvent>() {

        @Override
        public Observable<Void> handle(HttpServerRequest<String> request, final HttpServerResponse<ServerSentEvent> response) {
            final Map<String, List<String>> queryParameters = request.getQueryParameters();
            final Counter sseProcessedCounter;
            final Counter sseDroppedCounter;
            // heartbeat state
            boolean enableHeartbeats = false;
            boolean enableBinaryOutput = false;
            final AtomicLong heartBeatReadIdleSec = new AtomicLong(2);
            SerializedSubject<String, String> metaMsgSubject = PublishSubject.<String>create().toSerialized();
            final AtomicLong metaMessagesFreqMSec = new AtomicLong(1000);
            boolean enableMetaMessages = false;
            final AtomicLong lastWriteTime = new AtomicLong();
            Subscription heartbeatSubscription = null;
            Subscription metaMsgSubscription = null;
            // sample state
            boolean enableSampling = false;
            long samplingTimeMsec = 0;
            // client state
            String groupId = null;
            String slotId = null;
            String id = null;
            Func1<T, Boolean> predicateFunction = null;
            if (predicate != null) {
                predicateFunction = predicate.call(queryParameters);
            }
            byte[] delimiter = CompressionUtils.MANTIS_SSE_DELIMITER_BINARY;
            if (queryParameters != null && !queryParameters.isEmpty()) {
                if (queryParameters.containsKey(MantisSSEConstants.ID)) {
                    id = queryParameters.get(MantisSSEConstants.ID).get(0);
                }
                if (queryParameters.containsKey(MantisSSEConstants.SLOT_ID)) {
                    slotId = queryParameters.get(MantisSSEConstants.SLOT_ID).get(0);
                }
                // support groupId and clientId for grouping
                if (queryParameters.containsKey(MantisSSEConstants.GROUP_ID)) {
                    groupId = queryParameters.get(MantisSSEConstants.GROUP_ID).get(0);
                }
                if (queryParameters.containsKey(MantisSSEConstants.CLIENT_ID)) {
                    groupId = queryParameters.get(MantisSSEConstants.CLIENT_ID).get(0);
                }
                if (queryParameters.containsKey(MantisSSEConstants.HEARTBEAT_SEC)) {
                    heartBeatReadIdleSec.set(Long.parseLong(queryParameters.get(MantisSSEConstants.HEARTBEAT_SEC).get(0)));
                    if (heartBeatReadIdleSec.get() < 1) {
                        throw new IllegalArgumentException("Sampling rate too low: " + samplingTimeMsec);
                    }
                    enableHeartbeats = true;
                }
                if (queryParameters != null && queryParameters.containsKey(MantisSSEConstants.MANTIS_ENABLE_COMPRESSION)) {
                    String enableBinaryOutputStr = queryParameters.get(MantisSSEConstants.MANTIS_ENABLE_COMPRESSION).get(0);
                    if ("true".equalsIgnoreCase(enableBinaryOutputStr)) {
                        logger.info("Binary compression requested");
                        enableBinaryOutput = true;
                    }
                }
                if (queryParameters.containsKey(MantisSSEConstants.ENABLE_PINGS)) {
                    String enablePings = queryParameters.get(MantisSSEConstants.ENABLE_PINGS).get(0);
                    if ("true".equalsIgnoreCase(enablePings)) {
                        enableHeartbeats = true;
                    }
                }
                if (queryParameters.containsKey(MantisSSEConstants.ENABLE_META_MESSAGES)) {
                    String enableMetaMessagesStr = queryParameters.get(MantisSSEConstants.ENABLE_META_MESSAGES).get(0);
                    if ("true".equalsIgnoreCase(enableMetaMessagesStr)) {
                        enableMetaMessages = true;
                    }
                }
                if (queryParameters.containsKey(MantisSSEConstants.META_MESSAGES_SEC)) {
                    metaMessagesFreqMSec.set(Long.parseLong(queryParameters.get(MantisSSEConstants.META_MESSAGES_SEC).get(0)));
                    if (metaMessagesFreqMSec.get() < 250) {
                        throw new IllegalArgumentException("Meta message frequence rate too low: " + metaMessagesFreqMSec.get());
                    }
                    enableMetaMessages = true;
                }
                if (queryParameters.containsKey(MantisSSEConstants.SAMPLE)) {
                    samplingTimeMsec = Long.parseLong(queryParameters.get(MantisSSEConstants.SAMPLE).get(0)) * 1000;
                    if (samplingTimeMsec < 50) {
                        throw new IllegalArgumentException("Sampling rate too low: " + samplingTimeMsec);
                    }
                    enableSampling = true;
                }
                if (queryParameters.containsKey(MantisSSEConstants.SAMPLE_M_SEC)) {
                    samplingTimeMsec = Long.parseLong(queryParameters.get(MantisSSEConstants.SAMPLE_M_SEC).get(0));
                    if (samplingTimeMsec < 50) {
                        throw new IllegalArgumentException("Sampling rate too low: " + samplingTimeMsec);
                    }
                    enableSampling = true;
                }
                if (queryParameters.containsKey(MantisSSEConstants.MANTIS_COMPRESSION_DELIMITER)) {
                    String rawDelimiter = queryParameters.get(MantisSSEConstants.MANTIS_COMPRESSION_DELIMITER).get(0);
                    if (rawDelimiter != null && !rawDelimiter.isEmpty()) {
                        delimiter = rawDelimiter.getBytes();
                    }
                }
                if (queryParameters.containsKey(MantisSSEConstants.MQL)) {
                    String query = queryParameters.get(MantisSSEConstants.MQL).get(0);
                    if ((Boolean) mqlParses.invoke(query)) {
                        Query q = (Query) mqlMakeQuery.invoke(groupId, query);
                        predicateFunction = (T datum) -> datum instanceof Map ? q.matches((Map) datum) : true;
                    }
                }
            }
            InetSocketAddress socketAddress = (InetSocketAddress) response.getChannel().remoteAddress();
            Metrics metrics;
            if (groupId == null) {
                String address = socketAddress.getAddress().toString();
                metrics = registerSseMetrics(address, address);
            } else {
                metrics = registerSseMetrics(groupId, socketAddress.getAddress().toString());
            }
            sseProcessedCounter = metrics.getCounter(PROCESSED_COUNTER_METRIC_NAME);
            sseDroppedCounter = metrics.getCounter(DROPPED_COUNTER_METRIC_NAME);
            response.getHeaders().set("Access-Control-Allow-Origin", "*");
            response.getHeaders().set("content-type", "text/event-stream");
            response.getHeaders().set("Cache-Control", "no-cache, no-store, max-age=0, must-revalidate");
            response.getHeaders().set("Pragma", "no-cache");
            response.flush();
            if (queryParameters != null && requestPreprocessor != null) {
                requestPreprocessor.call(queryParameters, processorState);
            }
            if (enableMetaMessages && metaMessagesFreqMSec.get() > 0) {
                logger.info("Enabling Meta messages, interval : " + metaMessagesFreqMSec.get() + " ms");
                metaMsgSubscription = metaMsgSubject.throttleLast(metaMessagesFreqMSec.get(), TimeUnit.MILLISECONDS).doOnNext((String t) -> {
                    if (t != null && !t.isEmpty()) {
                        long currentTime = System.currentTimeMillis();
                        ByteBuf data = response.getAllocator().buffer().writeBytes(t.getBytes());
                        response.writeAndFlush(new ServerSentEvent(data));
                        lastWriteTime.set(currentTime);
                    }
                }).subscribe();
            }
            if (enableHeartbeats && heartBeatReadIdleSec.get() > 0) {
                logger.info("Enabling hearts, interval: " + heartBeatReadIdleSec);
                heartbeatSubscription = Observable.interval(2, heartBeatReadIdleSec.get(), TimeUnit.SECONDS).doOnNext((Long t1) -> {
                    long currentTime = System.currentTimeMillis();
                    long diff = (currentTime - lastWriteTime.get()) / 1000;
                    if (diff > heartBeatReadIdleSec.get()) {
                        ByteBuf data = response.getAllocator().buffer().writeBytes("ping".getBytes());
                        response.writeAndFlush(new ServerSentEvent(data));
                        lastWriteTime.set(currentTime);
                    }
                }).subscribe();
            }
            Action0 connectionClosedCallback = null;
            if (queryParameters != null && requestPostprocessor != null) {
                connectionClosedCallback = new Action0() {

                    @Override
                    public void call() {
                        requestPostprocessor.call(queryParameters, processorState);
                    }
                };
            }
            class SubscribeCallback implements Action0 {

                @Override
                public void call() {
                    if (queryParameters != null && subscribeProcessor != null) {
                        subscribeProcessor.call(queryParameters, processorState);
                    }
                }
            }
            return manageConnectionWithCompression(response, socketAddress.getHostString(), socketAddress.getPort(), groupId, slotId, id, lastWriteTime, enableHeartbeats, heartbeatSubscription, enableSampling, samplingTimeMsec, metaMsgSubject, metaMsgSubscription, predicateFunction, connectionClosedCallback, sseProcessedCounter, sseDroppedCounter, new SubscribeCallback(), enableBinaryOutput, true, delimiter);
        }
    }).pipelineConfigurator(PipelineConfigurators.serveSseConfigurator()).channelOption(ChannelOption.WRITE_BUFFER_WATER_MARK, new WriteBufferWaterMark(1024 * 1024, 5 * 1024 * 1024)).build();
    return server;
}