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https://issues.apache.org/jira/browse/FLINK-3102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045147#comment-15045147
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ASF GitHub Bot commented on FLINK-3102:
---------------------------------------
Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/1437#discussion_r46838706
--- Diff:
flink-streaming-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaTopicPartition.java
---
@@ -0,0 +1,117 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.streaming.connectors.kafka.internals;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A serializable representation of a kafka topic and a partition.
+ * Used as an operator state for the Kafka consumer
+ */
+public class KafkaTopicPartition implements Serializable {
--- End diff --
Can this be an immutable type?
> Allow reading from multiple topics with one FlinkKafkaConsumer
> --------------------------------------------------------------
>
> Key: FLINK-3102
> URL: https://issues.apache.org/jira/browse/FLINK-3102
> Project: Flink
> Issue Type: New Feature
> Components: Kafka Connector
> Reporter: Robert Metzger
> Assignee: Robert Metzger
>
> Currently, a Kafka consumer allows to read from only one topic.
> For cases where multiple topics contain messages with the same schema, it is
> useful to allow to subscribe to many topics using one FlinkKafkaConsumer
> instance.
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