98 lines
4.3 KiB
Java
98 lines
4.3 KiB
Java
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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.netty.channel.Channel;
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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.Collection;
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import java.util.List;
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import java.util.concurrent.ConcurrentMap;
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class InternalRepublisher {
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private static final Logger LOG = LoggerFactory.getLogger(InternalRepublisher.class);
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private final ConcurrentMap<String, ConnectionDescriptor> connectionDescriptors;
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InternalRepublisher(ConcurrentMap<String, ConnectionDescriptor> connectionDescriptors) {
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this.connectionDescriptors = connectionDescriptors;
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}
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void publishRetained(ClientSession targetSession, Collection<IMessagesStore.StoredMessage> messages) {
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for (IMessagesStore.StoredMessage storedMsg : messages) {
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//fire as retained the message
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Integer packetID = storedMsg.getQos() == AbstractMessage.QOSType.MOST_ONE ? null : targetSession.nextPacketId();
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if (packetID != null) {
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LOG.trace("Adding to inflight <{}>", packetID);
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targetSession.inFlightAckWaiting(storedMsg.getGuid(), packetID);
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}
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directSend(targetSession, storedMsg.getTopic(), storedMsg.getQos(), storedMsg.getPayload(), true, packetID);
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}
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}
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void publishStored(ClientSession clientSession, List<IMessagesStore.StoredMessage> publishedEvents) {
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for (IMessagesStore.StoredMessage pubEvt : publishedEvents) {
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//put in flight zone
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LOG.trace("Adding to inflight <{}>", pubEvt.getMessageID());
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clientSession.inFlightAckWaiting(pubEvt.getGuid(), pubEvt.getMessageID());
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directSend(clientSession, pubEvt.getTopic(), pubEvt.getQos(),
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pubEvt.getMessage(), false, pubEvt.getMessageID());
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}
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}
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private void directSend(ClientSession clientsession, String topic, AbstractMessage.QOSType qos,
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ByteBuffer message, boolean retained, Integer messageID) {
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String clientId = clientsession.clientID;
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LOG.debug("directSend invoked clientId <{}> on topic <{}> QoS {} retained {} messageID {}",
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clientId, topic, qos, retained, messageID);
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PublishMessage pubMessage = new PublishMessage();
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pubMessage.setRetainFlag(retained);
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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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LOG.info("send publish message to <{}> on topic <{}>", clientId, topic);
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if (LOG.isDebugEnabled()) {
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LOG.debug("content <{}>", DebugUtils.payload2Str(message));
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}
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//set the PacketIdentifier only for QoS > 0
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if (pubMessage.getQos() != AbstractMessage.QOSType.MOST_ONE) {
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pubMessage.setMessageID(messageID);
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} else {
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if (messageID != null) {
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throw new RuntimeException("Internal bad error, trying to forwardPublish a QoS 0 message " +
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"with PacketIdentifier: " + messageID);
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}
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}
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if (connectionDescriptors == null) {
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throw new RuntimeException("Internal bad error, found connectionDescriptors to null while it should be " +
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"initialized, somewhere it's overwritten!!");
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}
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if (connectionDescriptors.get(clientId) == null) {
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//TODO while we were publishing to the target client, that client disconnected,
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// could happen is not an error HANDLE IT
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throw new RuntimeException(String.format("Can't find a ConnectionDescriptor for client <%s> in cache <%s>",
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clientId, connectionDescriptors));
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}
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Channel channel = connectionDescriptors.get(clientId).channel;
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LOG.trace("Session for clientId {}", clientId);
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if (channel.isWritable()) {
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LOG.debug("channel is writable");
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//if channel is writable don't enqueue
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channel.writeAndFlush(pubMessage);
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} else {
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//enqueue to the client session
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LOG.debug("enqueue to client session");
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clientsession.enqueue(pubMessage);
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}
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}
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}
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