wcarlson5 commented on a change in pull request #11479:
URL: https://github.com/apache/kafka/pull/11479#discussion_r766186102
##########
File path:
streams/src/main/java/org/apache/kafka/streams/processor/internals/TopologyMetadata.java
##########
@@ -108,6 +124,44 @@ private void unlock() {
version.topologyLock.unlock();
}
+ public Collection<String> sourceTopicsForTopology(final String name) {
+ return builders.get(name).sourceTopicCollection();
+ }
+
+ public boolean needsUpdate(final String threadName) {
+ return threadVersions.get(threadName) < topologyVersion();
+ }
+
+ public void registerThread(final String threadName) {
+ threadVersions.put(threadName, 0L);
+ }
+
+ public void unregisterThread(final String threadName) {
+ threadVersions.remove(threadName);
+ }
+
+ public void maybeNotifyTopologyVersionWaiters(final String threadName) {
+ try {
+ lock();
+ final Iterator<TopologyVersionWaiters> iterator =
version.activeTopologyWaiters.listIterator();
+ TopologyVersionWaiters topologyVersionWaiters;
+ threadVersions.put(threadName, topologyVersion());
+ while (iterator.hasNext()) {
+ topologyVersionWaiters = iterator.next();
+ final long topologyVersionWaitersVersion =
topologyVersionWaiters.topologyVersion;
+ if (topologyVersionWaitersVersion <=
threadVersions.get(threadName)) {
+ if (threadVersions.values().stream().allMatch(t -> t >=
topologyVersionWaitersVersion)) {
+ topologyVersionWaiters.future.complete(null);
+ iterator.remove();
+ log.info("Thread {} is now on topology version {}",
threadName, topologyVersionWaiters.topologyVersion);
Review comment:
Those are good points. I updated the log and method name in a follow up.
I thought about extracting the version update to the caller but I would rather
have the coupled so I don't have to worry about them getting out of sync.
https://github.com/apache/kafka/pull/11589
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