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From GitBox <...@apache.org>
Subject [GitHub] srkukarni commented on a change in pull request #2698: Rework functions api with consumer
Date Tue, 02 Oct 2018 19:09:42 GMT
srkukarni commented on a change in pull request #2698: Rework functions api with consumer
URL: https://github.com/apache/pulsar/pull/2698#discussion_r222076324
 
 

 ##########
 File path: pulsar-functions/api-java/src/main/java/org/apache/pulsar/functions/api/Consumer.java
 ##########
 @@ -0,0 +1,35 @@
+/**
+ * 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.pulsar.functions.api;
+
+/**
+ * This is one of the core interface of the function api. The process is called
+ * for every message of the input topic of the function. The incoming input bytes
+ * are converted to the input type I for simple Java types(String, Integer, Boolean,
+ * Map, and List types) and for org.Json type. If this serialization approach does not
+ * meet your needs, you can use the byte stream handler defined in RawRequestHandler.
+ */
+@FunctionalInterface
+public interface Consumer<I> {
 
 Review comment:
   That will be a far bigger change. Making this abstract class and implementing as Function
might be the easiest way to go

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