Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/1082#discussion_r38404434
--- Diff:
flink-staging/flink-streaming/flink-streaming-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/partitioner/RichKafkaPartitioner.java
---
@@ -0,0 +1,28 @@
+/*
+ * 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.partitioner;
+
+
+/**
+ * Extended Kafka Partitioner.
+ * It contains a prepare() method which is called on each parallel
instance.
+ */
+public abstract class RichKafkaPartitioner implements KafkaPartitioner {
+ private static final long serialVersionUID = -4590784174150709918L;
+
+ public abstract void prepare(int parallelInstanceId, int
parallelInstances, int[] partitions);
--- End diff --
In all other cases, the method is called `open()`. I think with that we
established a bit of a terminology inside Flink, which would be good to follow
here.
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