Qos2 idempotent producer #733
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jfallows
requested changes
Jan 25, 2024
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The cyclomatic complexity of the code has gone up quite a bit with these proposed changes.
MqttKafkaSessionFactory
MqttSessionProxy
-> KafkaOffsetFetchStream
-> KafkaInitProducerStream
-> KafkaOffsetCommitStream
-> MqttKafkaPublishFactory.MqttPublishProxy
-> MqttKafkaPublishFactory.KafkaProxy
-> MqttKafkaPublishFactory.KafkaMessagesProxy
-> MqttKafkaPublishFactory.KafkaRetainedProxy
MqttKafkaPublishFactory
MqttPublishProxy
-> MqttKafkaSessionFactory.MqttSessionProxy
In general, we don't want to reach across stream factories for behavior, even doing so for state should be kept to a minimum.
In this case, we had discussed a minor change to have session handle offset commit instead of publish, but this change seems to have more inter-stream behavioral dependencies than that.
Perhaps we should have a discussion about it to determine how best to simplify if possible.
.../main/java/io/aklivity/zilla/runtime/binding/mqtt/kafka/internal/MqttKafkaConfiguration.java
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jfallows
requested changes
Feb 1, 2024
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| return new String16FW(BitUtil.toHex(offsetMetadata.buffer().byteArray(), | ||
| offsetMetadata.offset(), offsetMetadata.limit())); |
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We'll want to optimize this at some point to avoid allocation during qos2 ack.
...va/io/aklivity/zilla/runtime/binding/mqtt/kafka/internal/stream/MqttKafkaPublishFactory.java
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jfallows
requested changes
Feb 5, 2024
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specs/binding-mqtt.spec/src/main/resources/META-INF/zilla/mqtt.idl
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jfallows
requested changes
Feb 5, 2024
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jfallows
previously approved these changes
Feb 6, 2024
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