Github user srdo commented on a diff in the pull request:
https://github.com/apache/storm/pull/1808#discussion_r91366483
--- Diff:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/trident/KafkaTridentSpoutManager.java
---
@@ -44,29 +40,30 @@
// Bookkeeping
private final KafkaSpoutConfig<K, V> kafkaSpoutConfig;
// Declare some KafkaSpoutConfig references for convenience
- private KafkaSpoutStreams kafkaSpoutStreams; // Object
that wraps all the logic to declare output fields and emit tuples
- private KafkaSpoutTuplesBuilder<K, V> tuplesBuilder; // Object
that contains the logic to build tuples for each ConsumerRecord
+ private final Fields fields;
public KafkaTridentSpoutManager(KafkaSpoutConfig<K, V>
kafkaSpoutConfig) {
this.kafkaSpoutConfig = kafkaSpoutConfig;
- kafkaSpoutStreams = kafkaSpoutConfig.getKafkaSpoutStreams();
- tuplesBuilder = kafkaSpoutConfig.getTuplesBuilder();
+ RecordTranslator<K, V> translator =
kafkaSpoutConfig.getTranslator();
+ Fields fields = null;
+ for (String stream: translator.streams()) {
+ if (fields == null) {
+ fields = translator.getFieldsFor(stream);
+ } else {
+ if (!fields.equals(translator.getFieldsFor(stream))) {
+ throw new IllegalArgumentException("Trident Spouts do
nut support multiple output Fields");
--- End diff --
Nit: nut -> not. Also maybe rephrase as "must have the same fields for all
streams"
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