@Override
public void initialize() throws HyracksDataException {
try {
writer.open();
switch (message.getMessageType()) {
case END:
EndFeedMessage endFeedMessage = (EndFeedMessage) message;
switch (endFeedMessage.getEndMessageType()) {
case DISCONNECT_FEED:
hanldeDisconnectFeedTypeMessage(endFeedMessage);
break;
case DISCONTINUE_SOURCE:
handleDiscontinueFeedTypeMessage(endFeedMessage);
break;
}
break;
case PREPARE_STALL:
{
handlePrepareStallMessage((PrepareStallMessage) message);
break;
}
case TERMINATE_FLOW:
{
FeedConnectionId connectionId = ((TerminateDataFlowMessage) message).getConnectionId();
handleTerminateFlowMessage(connectionId);
break;
}
case COMMIT_ACK_RESPONSE:
{
handleFeedTupleCommitResponseMessage((FeedTupleCommitResponseMessage) message);
break;
}
case THROTTLING_ENABLED:
{
handleThrottlingEnabledMessage((ThrottlingEnabledFeedMessage) message);
break;
}
default:
break;
}
} catch (Exception e) {
throw new HyracksDataException(e);
} finally {
writer.close();
}
}
private void handleDiscontinueFeedTypeMessage(EndFeedMessage endFeedMessage) throws Exception {
FeedId sourceFeedId = endFeedMessage.getSourceFeedId();
SubscribableFeedRuntimeId subscribableRuntimeId =
new SubscribableFeedRuntimeId(sourceFeedId, FeedRuntimeType.INTAKE, partition);
ISubscribableRuntime feedRuntime =
feedManager.getFeedSubscriptionManager().getSubscribableRuntime(subscribableRuntimeId);
IAdapterRuntimeManager adapterRuntimeManager =
((IngestionRuntime) feedRuntime).getAdapterRuntimeManager();
adapterRuntimeManager.stop();
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.info("Stopped Adapter " + adapterRuntimeManager);
}
}
private void hanldeDisconnectFeedTypeMessage(EndFeedMessage endFeedMessage) throws Exception {
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.info("Ending feed:" + endFeedMessage.getFeedConnectionId());
}
FeedRuntimeId runtimeId = null;
FeedRuntimeType subscribableRuntimeType = ((EndFeedMessage) message).getSourceRuntimeType();
if (endFeedMessage.isCompleteDisconnection()) {
// subscribableRuntimeType represents the location at which the feed connection receives data
FeedRuntimeType runtimeType = null;
switch (subscribableRuntimeType) {
case INTAKE:
runtimeType = FeedRuntimeType.COLLECT;
break;
case COMPUTE:
runtimeType = FeedRuntimeType.COMPUTE_COLLECT;
break;
default:
throw new IllegalStateException(
"Invalid subscribable runtime type " + subscribableRuntimeType);
}
runtimeId = new FeedRuntimeId(runtimeType, partition, FeedRuntimeId.DEFAULT_OPERAND_ID);
CollectionRuntime feedRuntime =
(CollectionRuntime)
feedManager.getFeedConnectionManager().getFeedRuntime(connectionId, runtimeId);
feedRuntime.getSourceRuntime().unsubscribeFeed(feedRuntime);
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.info("Complete Unsubscription of " + endFeedMessage.getFeedConnectionId());
}
} else {
// subscribaleRuntimeType represents the location for data hand-off in presence of subscribers
switch (subscribableRuntimeType) {
case INTAKE:
// illegal state as data hand-off from one feed to another does not happen at intake
throw new IllegalStateException(
"Illegal State, invalid runtime type " + subscribableRuntimeType);
case COMPUTE:
// feed could be primary or secondary, doesn't matter
SubscribableFeedRuntimeId feedSubscribableRuntimeId =
new SubscribableFeedRuntimeId(
connectionId.getFeedId(), FeedRuntimeType.COMPUTE, partition);
ISubscribableRuntime feedRuntime =
feedManager
.getFeedSubscriptionManager()
.getSubscribableRuntime(feedSubscribableRuntimeId);
DistributeFeedFrameWriter dWriter =
(DistributeFeedFrameWriter) feedRuntime.getFeedFrameWriter();
Map<IFrameWriter, FeedFrameCollector> registeredCollectors =
dWriter.getRegisteredReaders();
IFrameWriter unsubscribingWriter = null;
for (Entry<IFrameWriter, FeedFrameCollector> entry : registeredCollectors.entrySet()) {
IFrameWriter frameWriter = entry.getKey();
FeedRuntimeInputHandler feedFrameWriter = (FeedRuntimeInputHandler) frameWriter;
if (feedFrameWriter.getConnectionId().equals(endFeedMessage.getFeedConnectionId())) {
unsubscribingWriter = feedFrameWriter;
dWriter.unsubscribeFeed(unsubscribingWriter);
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.info("Partial Unsubscription of " + unsubscribingWriter);
}
break;
}
}
break;
}
}
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.info("Unsubscribed from feed :" + connectionId);
}
}