Github user justinleet commented on a diff in the pull request:
https://github.com/apache/metron/pull/621#discussion_r126156447
--- Diff:
metron-platform/metron-storm-kafka/src/main/java/org/apache/metron/storm/kafka/flux/SimpleStormKafkaBuilder.java
---
@@ -176,16 +182,48 @@ public SimpleStormKafkaBuilder( Map<String, Object>
kafkaProps
, List<String> fieldsConfiguration
)
{
+ this(kafkaProps, toSubscription(topic), zkQuorum, fieldsConfiguration);
+ }
+
+ /**
+ * Create an object with the specified properties and exposing the
specified fields.
+ * @param kafkaProps The special kafka properties
+ * @param subscription The subscription to the kafka topic(s)
+ * @param zkQuorum The zookeeper quorum. We will use this to pull the
brokers from this.
+ * @param fieldsConfiguration The fields to expose in the storm tuple
emitted.
+ */
+ public SimpleStormKafkaBuilder( Map<String, Object> kafkaProps
+ , Subscription subscription
+ , String zkQuorum
+ , List<String> fieldsConfiguration
+ )
+ {
super( getBootstrapServers(zkQuorum, kafkaProps)
,
createDeserializer(Optional.ofNullable((String)kafkaProps.get(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG)),
DEFAULT_DESERIALIZER)
,
createDeserializer(Optional.ofNullable((String)kafkaProps.get(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG)),
DEFAULT_DESERIALIZER)
- , topic
+ , subscription
);
setProp(kafkaProps);
setRecordTranslator(new
SpoutRecordTranslator<>(FieldsConfiguration.toList(fieldsConfiguration)));
- this.topic = topic;
}
+
+ private static Subscription toSubscription(String topicOrSubscription) {
+ if (StringUtils.isEmpty(topicOrSubscription)) {
+ throw new IllegalStateException("Topic name is invalid: empty or
null");
--- End diff --
Could you make this IllegalArgumentException? It also might be nice to
include the value itself, because empty vs null seem like they could come up in
different ways.
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