Github user manuzhang commented on a diff in the pull request: https://github.com/apache/incubator-gearpump/pull/227#discussion_r147024506 --- Diff: streaming/src/main/scala/org/apache/gearpump/streaming/task/WatermarkProducer.scala --- @@ -0,0 +1,21 @@ +/* + * 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.gearpump.streaming.task + +trait WatermarkProducer --- End diff -- Please add comments on the purpose of this interface
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