Abacn commented on code in PR #32470:
URL: https://github.com/apache/beam/pull/32470#discussion_r1771942990
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sdks/java/io/mqtt/src/main/java/org/apache/beam/sdk/io/mqtt/MqttIO.java:
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@@ -502,6 +535,121 @@ public UnboundedMqttSource getCurrentSource() {
}
}
+ @AutoValue
+ public abstract static class DynamicWrite<InputT> extends
PTransform<PCollection<InputT>, PDone> {
+ abstract @Nullable ConnectionConfiguration connectionConfiguration();
+
+ abstract @Nullable SerializableFunction<InputT, String> topicFn();
Review Comment:
at pipeline expansion time, one can set topicFn to always return the topic,
and payloadFn to identify function for normal writes
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