Package org.apache.hedwig.protocol.PubSubProtocol

Examples of org.apache.hedwig.protocol.PubSubProtocol.SubscribeRequest

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        ByteString sub1 = ByteString.copyFromUtf8("sub1");

        //
        // No topics acquired.
        //
        SubscribeRequest subRequest = SubscribeRequest.newBuilder().setSubscriberId(sub1).build();
        MessageSeqId msgId = MessageSeqId.newBuilder().setLocalComponent(100).build();

        sm.serveSubscribeRequest(topic1, subRequest, msgId, msgIdCallback, null);

        Assert.assertEquals(ConcurrencyUtils.take(msgIdCallbackQueue).right().getClass(),
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            channel.write(PubSubResponseUtils.getResponseForException(e, request.getTxnId())).addListener(
                ChannelFutureListener.CLOSE);
            return;
        }

        final SubscribeRequest subRequest = request.getSubscribeRequest();
        final ByteString subscriberId = subRequest.getSubscriberId();

        MessageSeqId lastSeqIdPublished = MessageSeqId.newBuilder(seqId).setLocalComponent(seqId.getLocalComponent()).build();

        subMgr.serveSubscribeRequest(topic, subRequest, lastSeqIdPublished, new Callback<MessageSeqId>() {

            @Override
            public void operationFailed(Object ctx, PubSubException exception) {
                channel.write(PubSubResponseUtils.getResponseForException(exception, request.getTxnId())).addListener(
                    ChannelFutureListener.CLOSE);
            }

            @Override
            public void operationFinished(Object ctx, MessageSeqId resultOfOperation) {

                TopicSubscriber topicSub = new TopicSubscriber(topic, subscriberId);

                // race with channel getting disconnected while we are adding it
                // to the 2 maps
                synchronized (channel) {
                    if (!channel.isConnected()) {
                        // channel got disconnected while we were processing the
                        // subscribe request,
                        // nothing much we can do in this case
                        return;
                    }

                    if (null != sub2Channel.putIfAbsent(topicSub, channel)) {
                        // there was another channel mapped to this sub
                        PubSubException pse = new PubSubException.TopicBusyException(
                            "subscription for this topic, subscriberId is already being served on a different channel");
                        channel.write(PubSubResponseUtils.getResponseForException(pse, request.getTxnId()))
                        .addListener(ChannelFutureListener.CLOSE);
                        return;
                    } else {
                        // channel2sub is just a cache, so we can add to it
                        // without synchronization
                        channel2sub.put(channel, topicSub);
                    }
                }
                // First write success and then tell the delivery manager,
                // otherwise the first message might go out before the response
                // to the subscribe
                channel.write(PubSubResponseUtils.getSuccessResponse(request.getTxnId()));

                // want to start 1 ahead of the consume ptr
                MessageSeqId seqIdToStartFrom = MessageSeqId.newBuilder(resultOfOperation).setLocalComponent(
                                                    resultOfOperation.getLocalComponent() + 1).build();
                deliveryMgr.startServingSubscription(topic, subscriberId, seqIdToStartFrom,
                                                     new ChannelEndPoint(channel), TrueFilter.instance(), SubscriptionStateUtils
                                                     .isHubSubscriber(subRequest.getSubscriberId()));
            }
        }, null);

    }
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        sm.acquiredTopic(topic, voidCb, null);
        voidResult = ConcurrencyUtils.take(voidCb.queue);
        assertNull(voidResult.right()); // no exception

        // Do subscription
        SubscribeRequest subRequest = SubscribeRequest.newBuilder().setSubscriberId(subscriberId)
                .setCreateOrAttach(CreateOrAttach.CREATE_OR_ATTACH).build();
        sm.serveSubscribeRequest(topic, subRequest, MessageSeqId.newBuilder().setLocalComponent(0).build(), subDataCb,
                null);
        subDataResult = ConcurrencyUtils.take(subDataCb.queue);
        assertNotNull(subDataResult.left()); // serveSubscribeRequest success
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        ByteString sub1 = ByteString.copyFromUtf8("sub1");

        //
        // No topics acquired.
        //
        SubscribeRequest subRequest = SubscribeRequest.newBuilder().setSubscriberId(sub1).build();
        MessageSeqId msgId = MessageSeqId.newBuilder().setLocalComponent(100).build();

        sm.serveSubscribeRequest(topic1, subRequest, msgId, msgIdCallback, null);

        Assert.assertEquals(ConcurrencyUtils.take(msgIdCallbackQueue).right().getClass(),
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        sm.acquiredTopic(topic, voidCb, null);
        voidResult = ConcurrencyUtils.take(voidCb.queue);
        assertNull(voidResult.right()); // no exception

        // Do subscription
        SubscribeRequest subRequest = SubscribeRequest.newBuilder().setSubscriberId(subscriberId)
                .setCreateOrAttach(CreateOrAttach.CREATE_OR_ATTACH).build();
        sm.serveSubscribeRequest(topic, subRequest, MessageSeqId.newBuilder().setLocalComponent(0).build(), subDataCb,
                null);
        subDataResult = ConcurrencyUtils.take(subDataCb.queue);
        assertNotNull(subDataResult.left()); // serveSubscribeRequest success
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            subStats.incrementFailedOps();
            ServerStats.getInstance().incrementRequestsRedirect();
            return;
        }

        final SubscribeRequest subRequest = request.getSubscribeRequest();
        final ByteString subscriberId = subRequest.getSubscriberId();

        MessageSeqId lastSeqIdPublished = MessageSeqId.newBuilder(seqId).setLocalComponent(seqId.getLocalComponent()).build();

        final long requestTime = MathUtils.now();
        subMgr.serveSubscribeRequest(topic, subRequest, lastSeqIdPublished, new Callback<SubscriptionData>() {

            @Override
            public void operationFailed(Object ctx, PubSubException exception) {
                channel.write(PubSubResponseUtils.getResponseForException(exception, request.getTxnId())).addListener(
                    ChannelFutureListener.CLOSE);
                logger.error("Error serving subscribe request (" + request.getTxnId() + ") for (topic: "
                           + topic.toStringUtf8() + " , subscriber: " + subscriberId.toStringUtf8() + ")", exception);
                subStats.incrementFailedOps();
            }

            @Override
            public void operationFinished(Object ctx, final SubscriptionData subData) {

                TopicSubscriber topicSub = new TopicSubscriber(topic, subscriberId);
                synchronized (channel) {
                    if (!channel.isConnected()) {
                        // channel got disconnected while we were processing the
                        // subscribe request,
                        // nothing much we can do in this case
                        subStats.incrementFailedOps();
                        return;
                    }
                }
                // initialize the message filter
                PipelineFilter filter = new PipelineFilter();
                try {
                    // the filter pipeline should be
                    // 1) AllToAllTopologyFilter to filter cross-region messages
                    filter.addLast(new AllToAllTopologyFilter());
                    // 2) User-Customized MessageFilter
                    if (subData.hasPreferences() &&
                        subData.getPreferences().hasMessageFilter()) {
                        String messageFilterName = subData.getPreferences().getMessageFilter();
                        filter.addLast(ReflectionUtils.newInstance(messageFilterName, ServerMessageFilter.class));
                    }
                    // initialize the filter
                    filter.initialize(cfg.getConf());
                    filter.setSubscriptionPreferences(topic, subscriberId,
                                                      subData.getPreferences());
                } catch (RuntimeException re) {
                    String errMsg = "RuntimeException caught when instantiating message filter for (topic:"
                                  + topic.toStringUtf8() + ", subscriber:" + subscriberId.toStringUtf8() + ")."
                                  + "It might be introduced by programming error in message filter.";
                    logger.error(errMsg, re);
                    PubSubException pse = new PubSubException.InvalidMessageFilterException(errMsg, re);
                    subStats.incrementFailedOps();
                    // we should not close the subscription channel, just response error
                    // client decide to close it or not.
                    channel.write(PubSubResponseUtils.getResponseForException(pse, request.getTxnId()));
                    return;
                } catch (Throwable t) {
                    String errMsg = "Failed to instantiate message filter for (topic:" + topic.toStringUtf8()
                                  + ", subscriber:" + subscriberId.toStringUtf8() + ").";
                    logger.error(errMsg, t);
                    PubSubException pse = new PubSubException.InvalidMessageFilterException(errMsg, t);
                    subStats.incrementFailedOps();
                    channel.write(PubSubResponseUtils.getResponseForException(pse, request.getTxnId()))
                    .addListener(ChannelFutureListener.CLOSE);
                    return;
                }
                boolean forceAttach = false;
                if (subRequest.hasForceAttach()) {
                    forceAttach = subRequest.getForceAttach();
                }
                // Try to store the subscription channel for the topic subscriber
                Channel oldChannel = subChannelMgr.put(topicSub, channel, forceAttach);
                if (null != oldChannel) {
                    PubSubException pse = new PubSubException.TopicBusyException(
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            UmbrellaHandler.sendErrorResponseToMalformedRequest(channel, request.getTxnId(),
                    "Missing subscribe request data");
            return;
        }

        SubscribeRequest subRequest = request.getSubscribeRequest();
        final TopicSubscriber topicSubscriber = new TopicSubscriber(request.getTopic(), subRequest.getSubscriberId());

        subscriber.asyncSubscribe(topicSubscriber.getTopic(), subRequest.getSubscriberId(), subRequest
        .getCreateOrAttach(), new Callback<Void>() {
            @Override
            public void operationFailed(Object ctx, PubSubException exception) {
                channel.write(PubSubResponseUtils.getResponseForException(exception, request.getTxnId()));
            }
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        ByteString sub1 = ByteString.copyFromUtf8("sub1");

        //
        // No topics acquired.
        //
        SubscribeRequest subRequest = SubscribeRequest.newBuilder().setSubscriberId(sub1).build();
        MessageSeqId msgId = MessageSeqId.newBuilder().setLocalComponent(100).build();

        sm.serveSubscribeRequest(topic1, subRequest, msgId, subDataCallback, null);

        Assert.assertEquals(ConcurrencyUtils.take(subDataCallbackQueue).right().getClass(),
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            subStats.incrementFailedOps();
            ServerStats.getInstance().incrementRequestsRedirect();
            return;
        }

        final SubscribeRequest subRequest = request.getSubscribeRequest();
        final ByteString subscriberId = subRequest.getSubscriberId();

        MessageSeqId lastSeqIdPublished = MessageSeqId.newBuilder(seqId).setLocalComponent(seqId.getLocalComponent()).build();

        final long requestTime = System.currentTimeMillis();
        subMgr.serveSubscribeRequest(topic, subRequest, lastSeqIdPublished, new Callback<MessageSeqId>() {

            @Override
            public void operationFailed(Object ctx, PubSubException exception) {
                channel.write(PubSubResponseUtils.getResponseForException(exception, request.getTxnId())).addListener(
                    ChannelFutureListener.CLOSE);
                subStats.incrementFailedOps();
            }

            @Override
            public void operationFinished(Object ctx, MessageSeqId resultOfOperation) {

                TopicSubscriber topicSub = new TopicSubscriber(topic, subscriberId);

                // race with channel getting disconnected while we are adding it
                // to the 2 maps
                synchronized (channel) {
                    if (!channel.isConnected()) {
                        // channel got disconnected while we were processing the
                        // subscribe request,
                        // nothing much we can do in this case
                        subStats.incrementFailedOps();
                        return;
                    }

                    if (null != sub2Channel.putIfAbsent(topicSub, channel)) {
                        // there was another channel mapped to this sub
                        PubSubException pse = new PubSubException.TopicBusyException(
                            "subscription for this topic, subscriberId is already being served on a different channel");
                        channel.write(PubSubResponseUtils.getResponseForException(pse, request.getTxnId()))
                        .addListener(ChannelFutureListener.CLOSE);
                        subStats.incrementFailedOps();
                        return;
                    } else {
                        // channel2sub is just a cache, so we can add to it
                        // without synchronization
                        channel2sub.put(channel, topicSub);
                    }
                }
                // First write success and then tell the delivery manager,
                // otherwise the first message might go out before the response
                // to the subscribe
                channel.write(PubSubResponseUtils.getSuccessResponse(request.getTxnId()));
                subStats.updateLatency(System.currentTimeMillis() - requestTime);

                // want to start 1 ahead of the consume ptr
                MessageSeqId seqIdToStartFrom = MessageSeqId.newBuilder(resultOfOperation).setLocalComponent(
                                                    resultOfOperation.getLocalComponent() + 1).build();
                deliveryMgr.startServingSubscription(topic, subscriberId, seqIdToStartFrom,
                                                     new ChannelEndPoint(channel), TrueFilter.instance(), SubscriptionStateUtils
                                                     .isHubSubscriber(subRequest.getSubscriberId()));
            }
        }, null);

    }
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Related Classes of org.apache.hedwig.protocol.PubSubProtocol.SubscribeRequest

  • org.apache.hedwig.server.handlers.SubscribeHandler
  • org.apache.hedwig.server.persistence.TestBookKeeperPersistenceManager
  • org.apache.hedwig.server.proxy.ProxySubscribeHandler
  • org.apache.hedwig.server.subscriptions.TestMMSubscriptionManager
  • org.apache.hedwig.server.subscriptions.TestZkSubscriptionManager
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