/**
* Remove all references to the channel. 1) the map of a channel (socket) to its interests. 2) the
* map of interests to its channels.
*
* <p>As each interest is removed inform all channels having a similar interest.
*
* @param sourceCtx
*/
public void unregister(final ChannelHandlerContext sourceCtx) {
final SocketAddress key = sourceCtx.channel().remoteAddress();
majorLogger.info("unregister channel {}", key);
final Interest.ChannelInterestSet channelInterestSet = this.channelInterestMap.remove(key);
if (channelInterestSet == null) {
majorLogger.warn(
"nothing to unregister in interest map: {}", this.channelInterestMap.keySet());
return;
}
final String trackingGuid = UUID.randomUUID().toString();
majorLogger.warn("no interested channel set");
for (final Interest interest : channelInterestSet.getInterestList()) {
if (!this.interestedChannelMap.containsKey(interest)) {
continue;
}
final Interest.InterestedChannelSet interestedChannelSet =
this.interestedChannelMap.get(interest);
interestedChannelSet.removeItem(sourceCtx, interest);
majorLogger.info("unregistered interest {}", interest);
// this.interestedChannelMap.put(interest, interestedChannelSet);
// an implicit DISINTEREST message will be sent to all interested channels
final MetaLinkMsg.Edit.Builder editBuilder =
MetaLinkMsg.Edit.newBuilder()
.addMode(MetaLinkMsg.Edit.EditMode.DISINTEREST)
.setEditMode(MetaLinkMsg.Edit.EditMode.DISINTEREST)
.setGuid(trackingGuid)
.setSequence(sequenceNumber.incrementAndGet())
.addAllTopic(interest.getTopic())
.addOrigin(sourceCtx.channel().remoteAddress().toString())
.addOrigin(METALINK_BRIDGE_NAME);
final MetaLinkMsg.Edit disinterestMsg = editBuilder.build();
majorLogger.trace("expressing disinterest to all channels except source");
for (final Map.Entry<SocketAddress, Interest.ChannelInterestSet> entry :
this.channelInterestMap.entrySet()) {
final ChannelHandlerContext ctx = entry.getValue().context;
if (isSameChannel(ctx, sourceCtx)) {
continue;
}
majorLogger.trace("disinterest {} to {}", trackingGuid, ctx.channel().remoteAddress());
ctx.write(disinterestMsg);
ctx.flush();
detailLogger.info("message sent:\n{}", disinterestMsg);
}
}
}
/**
* Send the data to all channels except the incoming channel.
*
* <p>Write the message to the recorder file for later study and playback. This involves
* converting the binary payload to a textual representation.
*
* <p>If the inbound message is an INTEREST message then it is not sent. Instead it is responded
* to in a way indicated by the ?.
*
* @param sourceCtx
* @param originalMsg
*/
public void distribute(ChannelHandlerContext sourceCtx, final MetaLinkMsg.Edit originalMsg) {
majorLogger.trace(
"incoming message to distribute(): {}\n {}",
sourceCtx.channel().remoteAddress(),
originalMsg);
if (originalMsg == null) {
majorLogger.warn("attempt to distribute null message");
return;
}
try {
final SyntheticData.Recorder recorder = this.recorder.get();
final MetaLinkMsg.Edit.Builder editBuilder = originalMsg.toBuilder();
final MetaLinkMsg.Edit msg;
if (originalMsg.getModeCount() < 1) {
if (originalMsg.hasEditMode()) {
editBuilder.addMode(originalMsg.getEditMode());
msg = editBuilder.build();
} else {
majorLogger.warn("no edit mode provided, assuming POST");
editBuilder.addMode(MetaLinkMsg.Edit.EditMode.POST);
editBuilder.setEditMode(MetaLinkMsg.Edit.EditMode.POST);
msg = editBuilder.build();
}
} else {
if (originalMsg.hasEditMode()) {
if (originalMsg.getEditMode() == originalMsg.getMode(originalMsg.getModeCount() - 1)) {
msg = editBuilder.build();
} else {
majorLogger.info("edit mode mismatch, set the last mode");
editBuilder.addMode(originalMsg.getEditMode());
msg = editBuilder.build();
}
} else {
majorLogger.info("edit mode provided, using the last mode");
editBuilder.setEditMode(originalMsg.getMode(originalMsg.getModeCount() - 1));
msg = editBuilder.build();
}
}
if (null != recorder) {
recorder.record(sourceCtx, msg);
}
final String trackingGuid =
msg.hasGuid() ? msg.getGuid().toString() : UUID.randomUUID().toString();
final String origin = (msg.getOriginCount() > 0) ? msg.getOrigin(0) : "";
switch (msg.getEditMode()) {
case NOTICE:
{
final Interest topic = new Interest(msg.getTopicList());
final Interest.InterestedChannelSet channelSet = this.interestedChannelMap.get(topic);
if (channelSet == null) {
majorLogger.warn("no interested channel set");
editBuilder
.addMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.setEditMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.addOrigin(METALINK_BRIDGE_NAME)
.setSequence(sequenceNumber.incrementAndGet());
final MetaLinkMsg.Notice.Builder noticeBuilder =
MetaLinkMsg.Notice.newBuilder()
.setNoticeMode(MetaLinkMsg.Notice.NoticeMode.ACK)
.setCode(NO_INTEREST_PRESENT)
.setMsg("no interest in topic")
.setId(msg.getGuid());
editBuilder.addNotices(noticeBuilder);
final MetaLinkMsg.Edit updatedEdit = editBuilder.build();
majorLogger.trace(
"notice no-interest notice {} to {}",
trackingGuid,
sourceCtx.channel().remoteAddress());
sourceCtx.write(updatedEdit);
sourceCtx.flush();
detailLogger.info("update edit\n{}", updatedEdit);
if (null != recorder) {
recorder.record(sourceCtx, updatedEdit);
}
break;
}
majorLogger.trace("posting notice to all interested channels except source");
boolean anyInterest = false;
for (final ChannelHandlerContext ctx : channelSet.getContextSet()) {
if (isSameChannel(ctx, sourceCtx)) {
continue;
}
anyInterest = true;
majorLogger.trace(
"notice forward {} to {}", trackingGuid, ctx.channel().remoteAddress());
ctx.write(msg);
ctx.flush();
detailLogger.info("message sent:\n{}", msg);
}
if (!anyInterest) {
editBuilder
.addMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.setEditMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.addOrigin(METALINK_BRIDGE_NAME)
.setSequence(sequenceNumber.incrementAndGet());
final MetaLinkMsg.Notice.Builder noticeBuilder =
MetaLinkMsg.Notice.newBuilder()
.setNoticeMode(MetaLinkMsg.Notice.NoticeMode.ACK)
.setCode(NO_INTEREST_PRESENT)
.setMsg("no pending interest for topic")
.setId(msg.getGuid());
editBuilder.addNotices(noticeBuilder);
final MetaLinkMsg.Edit updatedEdit = editBuilder.build();
majorLogger.trace(
"notice no interest {} to {}", trackingGuid, sourceCtx.channel().remoteAddress());
sourceCtx.write(updatedEdit);
sourceCtx.flush();
detailLogger.info("message sent:\n{}", updatedEdit);
majorLogger.trace("cannot post, no other interest \n{}", updatedEdit);
if (null != recorder) {
recorder.record(sourceCtx, updatedEdit);
}
}
break;
}
case POST:
{
final Interest topic = new Interest(msg.getTopicList());
final Interest.InterestedChannelSet channelSet = this.interestedChannelMap.get(topic);
if (channelSet == null || channelSet.size() == 0) {
majorLogger.warn("no interested channel set");
editBuilder
.addMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.setEditMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.addOrigin(METALINK_BRIDGE_NAME)
.setSequence(sequenceNumber.incrementAndGet());
final MetaLinkMsg.Notice.Builder noticeBuilder =
MetaLinkMsg.Notice.newBuilder()
.setNoticeMode(MetaLinkMsg.Notice.NoticeMode.ACK)
.setCode(NO_INTEREST_PRESENT)
.setMsg("no interest in the posted topic")
.setId(msg.getGuid());
editBuilder.addNotices(noticeBuilder);
final MetaLinkMsg.Edit updatedEdit = editBuilder.build();
majorLogger.trace(
"post no-interest {} to {}", trackingGuid, sourceCtx.channel().remoteAddress());
sourceCtx.write(updatedEdit);
sourceCtx.flush();
detailLogger.info("message sent:\n{}", updatedEdit);
if (null != recorder) {
recorder.record(sourceCtx, updatedEdit);
}
break;
} else {
majorLogger.trace("posting edit to all interested channels except source");
for (final ChannelHandlerContext ctx : channelSet.getContextSet()) {
if (isSameChannel(ctx, sourceCtx)) {
continue;
}
majorLogger.trace("post all {} to {}", trackingGuid, ctx.channel().remoteAddress());
ctx.write(msg);
ctx.flush();
detailLogger.info("message sent:\n{}", msg);
}
}
/*
if (! anyInterest) {
editBuilder
.addMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.setEditMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.addOrigin(METALINK_BRIDGE_NAME)
.setSequence(sequenceNumber.incrementAndGet());
final MetaLinkMsg.Notice.Builder noticeBuilder = MetaLinkMsg.Notice.newBuilder()
.setNoticeMode(MetaLinkMsg.Notice.NoticeMode.ACK)
.setCode(NO_INTEREST_PRESENT)
.setMsg("no pending interest for topic")
.setId(msg.getGuid());
editBuilder.addNotices(noticeBuilder);
final MetaLinkMsg.Edit updatedEdit = editBuilder.build();
majorLogger.trace("post no interest {} to {}",
trackingGuid, sourceCtx.channel().remoteAddress());
sourceCtx.write(updatedEdit);
sourceCtx.flush();
detailLogger.info("message sent:\n{}", updatedEdit);
majorLogger.trace("cannot post, no other interest \n{}", updatedEdit);
if (null != recorder) {
recorder.record(sourceCtx, updatedEdit);
}
}
*/
break;
}
case INTEREST:
{
final Interest interest = new Interest(msg.getTopicList());
playback(sourceCtx, interest);
majorLogger.trace("determine if there is a client which already is interested?");
final Interest.InterestedChannelSet ics = this.interestedChannelMap.get(interest);
boolean anyInterest = false;
if (ics != null) {
for (final ChannelHandlerContext ctx : ics.getContextSet()) {
if (isSameChannel(ctx, sourceCtx)) {
continue;
}
anyInterest = true;
majorLogger.trace(
"interest in {} from {} to {}",
trackingGuid,
ctx.channel().remoteAddress(),
sourceCtx.channel().remoteAddress());
sourceCtx.write(msg);
sourceCtx.flush();
detailLogger.info("message sent:\n{}", msg);
}
}
if (!anyInterest) {
editBuilder
.addMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.setEditMode(MetaLinkMsg.Edit.EditMode.NOTICE)
.addOrigin(METALINK_BRIDGE_NAME)
.setSequence(sequenceNumber.incrementAndGet());
final MetaLinkMsg.Notice.Builder noticeBuilder =
MetaLinkMsg.Notice.newBuilder()
.setNoticeMode(MetaLinkMsg.Notice.NoticeMode.ACK)
.setCode(NO_INTEREST_PRESENT)
.setMsg("no pending interest for topic")
.setId(msg.getGuid());
editBuilder.addNotices(noticeBuilder);
final MetaLinkMsg.Edit updatedEdit = editBuilder.build();
majorLogger.trace(
"interest notice {} to {}", trackingGuid, sourceCtx.channel().remoteAddress());
sourceCtx.write(updatedEdit);
sourceCtx.flush();
detailLogger.info("message sent:\n{}", updatedEdit);
majorLogger.trace("no other interest");
if (null != recorder) {
recorder.record(sourceCtx, updatedEdit);
}
}
setInterest(sourceCtx, interest);
majorLogger.trace("interest recorded");
majorLogger.trace("expressing interest to all channels except source");
for (final Map.Entry<SocketAddress, Interest.ChannelInterestSet> entry :
this.channelInterestMap.entrySet()) {
final ChannelHandlerContext ctx = entry.getValue().context;
if (isSameChannel(ctx, sourceCtx)) {
continue;
}
majorLogger.trace("interest {} to {}", trackingGuid, ctx.channel().remoteAddress());
ctx.write(msg);
ctx.flush();
detailLogger.info("message sent:\n{}", msg);
}
break;
}
case DISINTEREST:
{
final Interest interest = new Interest(msg.getTopicList());
majorLogger.trace("expressing disinterest to all channels except source");
for (final Map.Entry<SocketAddress, Interest.ChannelInterestSet> entry :
this.channelInterestMap.entrySet()) {
final ChannelHandlerContext ctx = entry.getValue().context;
if (isSameChannel(ctx, sourceCtx)) {
continue;
}
majorLogger.trace(
"disinterest {} to {}", trackingGuid, ctx.channel().remoteAddress());
ctx.write(msg);
ctx.flush();
detailLogger.info("message sent:\n{}", msg);
}
setDisinterest(sourceCtx, interest);
}
}
} catch (Exception ex) {
majorLogger.warn("problem distributing message", ex);
}
majorLogger.info("MESSAGE PROCESSED");
}