87 lines
3.9 KiB
Java
87 lines
3.9 KiB
Java
package io.moquette.spi.impl;
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import io.moquette.parser.proto.messages.AbstractMessage;
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import io.moquette.parser.proto.messages.PublishMessage;
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import io.moquette.server.ConnectionDescriptorStore;
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import io.moquette.spi.ClientSession;
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import io.moquette.spi.IMessagesStore;
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import io.moquette.spi.ISessionsStore;
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import io.moquette.spi.MessageGUID;
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import io.moquette.spi.impl.subscriptions.Subscription;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.nio.ByteBuffer;
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import java.util.List;
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import static io.moquette.spi.impl.ProtocolProcessor.lowerQosToTheSubscriptionDesired;
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class MessagesPublisher {
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private static final Logger LOG = LoggerFactory.getLogger(MessagesPublisher.class);
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private final ConnectionDescriptorStore connectionDescriptors;
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private final ISessionsStore m_sessionsStore;
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private final IMessagesStore m_messagesStore;
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private final PersistentQueueMessageSender messageSender;
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public MessagesPublisher(ConnectionDescriptorStore connectionDescriptors, ISessionsStore sessionsStore,
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IMessagesStore messagesStore, PersistentQueueMessageSender messageSender) {
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this.connectionDescriptors = connectionDescriptors;
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this.m_sessionsStore = sessionsStore;
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this.m_messagesStore = messagesStore;
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this.messageSender = messageSender;
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}
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static PublishMessage notRetainedPublish(String topic, AbstractMessage.QOSType qos, ByteBuffer message) {
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PublishMessage pubMessage = new PublishMessage();
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pubMessage.setRetainFlag(false);
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pubMessage.setTopicName(topic);
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pubMessage.setQos(qos);
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pubMessage.setPayload(message);
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return pubMessage;
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}
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void publish2Subscribers(IMessagesStore.StoredMessage pubMsg, List<Subscription> topicMatchingSubscriptions) {
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final String topic = pubMsg.getTopic();
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final AbstractMessage.QOSType publishingQos = pubMsg.getQos();
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final ByteBuffer origMessage = pubMsg.getMessage();
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//if QoS 1 or 2 store the message
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//TODO perhaps this block is not needed.
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MessageGUID guid = null;
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if (publishingQos != AbstractMessage.QOSType.MOST_ONE) {
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guid = m_messagesStore.storePublishForFuture(pubMsg);
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}
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for (final Subscription sub : topicMatchingSubscriptions) {
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AbstractMessage.QOSType qos = lowerQosToTheSubscriptionDesired(sub, publishingQos);
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ClientSession targetSession = m_sessionsStore.sessionForClient(sub.getClientId());
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boolean targetIsActive = this.connectionDescriptors.isConnected(sub.getClientId());
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ByteBuffer message = origMessage.duplicate();
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if (targetIsActive) {
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LOG.debug("Sending PUBLISH message to active subscriber. MessageId = {}, mqttClientId = {}, topicFilter = {}, " +
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"qos = {}.", pubMsg.getMessageID(), sub.getClientId(), sub.getTopicFilter(), qos);
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PublishMessage publishMsg = notRetainedPublish(topic, qos, message);
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if (qos != AbstractMessage.QOSType.MOST_ONE) {
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//QoS 1 or 2
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int messageId = targetSession.nextPacketId();
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targetSession.inFlightAckWaiting(guid, messageId);
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//set the PacketIdentifier only for QoS > 0
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publishMsg.setMessageID(messageId);
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}
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this.messageSender.sendPublish(targetSession, publishMsg);
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} else {
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if (!targetSession.isCleanSession()) {
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LOG.debug("Storing pending PUBLISH inactive message. MessageId = {}, mqttClientId = {}, " +
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"topicFilter = {}, qos = {}.",
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pubMsg.getMessageID(), sub.getClientId(), sub.getTopicFilter(), qos);
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//store the message in targetSession queue to deliver
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targetSession.enqueue(pubMsg);
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}
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}
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}
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}
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}
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