[improve][io][kca] support fully-qualified topic names in source records#24248
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lhotari merged 2 commits intoapache:masterfrom May 7, 2025
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@lhotari, @AlvaroStream - I hope you don't mind me tagging you in this pull request. I took the liberty to do this because of the discussions we had around #24221 😊 |
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change LGTM, @efcasado. Thanks for continuing the contributions! |
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Sure thing. |
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Done. I added a couple of simple tests (ie. short and fully-qualified topic names). Passing build can be found here. |
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Motivation
This change builds on the work previously done in #24221.
The current implementation of the Kafka Connect adaptor in Pulsar IO does not support fully-qualified Pulsar topic names in source records. Instead, it forcefully prepends the default
persistent://<tenant>/<namespace>/prefix to all destination topics. This behavior can be problematic in multi-tenant environments where dynamic topic routing is required.For example, consider a setup with:
tenant1,tenant2)tenant1,tenant2)global(shared) tenantUsing Kafka Connect transformations, users may want to route records to tenant-specific topics based on the PostgreSQL schema:
With this configuration, changes to
tenant1.ordersshould go topersistent://tenant1/procurement/orders, andtenant2.orderstopersistent://tenant2/procurement/orders.However, the current implementation prepends
persistent://global/procurement/to the already fully-qualified topic, resulting in invalid topic names likepersistent://global/procurement/persistent://tenant1/procurement/orders. This causes runtime exceptions and connector failure loops.By supporting fully-qualified topic names, this change enables more flexible and tenant-aware architectures without requiring additional processing layers.
Modifications
This change adjusts
AbstractKafkaConnectSourceto correctly handle fully-qualified topic names by using theorg.apache.pulsar.common.naming.TopicNameutility. If the topic name is valid and fully-qualified, it is respected as-is. Otherwise, the adaptor falls back to the existing behavior, ensuring backward compatibility.Verifying this change
This change added tests and can be verified as follows:
KafkaConnectSourceTesttest suite with a couple of tests to confirm Kafka Connect Adaptor can handle short and fully-qualified topic namesDocumentation
docdoc-requireddoc-not-neededdoc-complete