Github user hmcl commented on a diff in the pull request:
https://github.com/apache/storm/pull/1835#discussion_r93558408
--- Diff:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/internal/partition/KafkaPartitionReaders.java
---
@@ -0,0 +1,27 @@
+package org.apache.storm.kafka.spout.internal.partition;
+
+import org.apache.kafka.common.PartitionInfo;
+import org.apache.kafka.common.TopicPartition;
+import org.apache.storm.kafka.spout.KafkaSpoutStreams;
+import org.apache.storm.kafka.spout.KafkaSpoutStreamsNamedTopics;
+import org.apache.storm.kafka.spout.KafkaSpoutStreamsWildcardTopics;
+
+import java.util.HashSet;
+
+public final class KafkaPartitionReaders {
+ public static KafkaPartitionReader partitionReaderOf(KafkaSpoutStreams
kafkaSpoutStreams) {
+ if (kafkaSpoutStreams instanceof KafkaSpoutStreamsNamedTopics) {
+ return new NamedTopicPartitionReader(new HashSet<>(
+
KafkaSpoutStreamsNamedTopics.class.cast(kafkaSpoutStreams).getTopics()));
+ } else if (kafkaSpoutStreams instanceof
KafkaSpoutStreamsWildcardTopics) {
+ return new WildcardTopicPartitionReader(
+
KafkaSpoutStreamsWildcardTopics.class.cast(kafkaSpoutStreams).getTopicWildcardPattern());
+ } else {
+ throw new IllegalArgumentException("Unrecognized kafka spout
stream: " + kafkaSpoutStreams.getClass());
+ }
+ }
+
+ public static TopicPartition convert(PartitionInfo partitionInfo) {
--- End diff --
call this toTopicPartition
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