77 lines
3.5 KiB
Java
77 lines
3.5 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.ConnectionDescriptor;
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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 java.util.concurrent.ConcurrentMap;
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import static io.moquette.spi.impl.PersistentQueueMessageSender.createPublishForQos;
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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 ConcurrentMap<String, ConnectionDescriptor> 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 persistentSender;
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public MessagesPublisher(ConcurrentMap<String, ConnectionDescriptor> connectionDescriptors, ISessionsStore sessionsStore,
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IMessagesStore messagesStore) {
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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.persistentSender = new PersistentQueueMessageSender(connectionDescriptors);
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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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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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LOG.trace("Found {} matching subscriptions to <{}>", topicMatchingSubscriptions.size(), topic);
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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.containsKey(sub.getClientId());
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LOG.debug("Broker republishing to client <{}> topic <{}> qos <{}>, active {}",
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sub.getClientId(), sub.getTopicFilter(), qos, targetIsActive);
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ByteBuffer message = origMessage.duplicate();
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if (targetIsActive) {
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PublishMessage publishMsg = createPublishForQos(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.persistentSender.sendPublish(targetSession, publishMsg);
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} else {
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if (!targetSession.isCleanSession()) {
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//store the message in targetSession queue to deliver
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targetSession.enqueueToDeliver(guid);
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}
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}
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}
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}
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}
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