| // Copyright 2017 Twitter. All rights reserved. |
| // |
| // Licensed 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 com.twitter.heron.dsl; |
| |
| import java.io.Serializable; |
| import java.util.function.Function; |
| |
| /** |
| * All user supplied transformation functions have to be serializable. |
| * Thus all Strealmet transformation definitions take Serializable |
| * Functions as their input. We simply decorate java.util. function |
| * definitions with a Serializable tag to ensure that any supplied |
| * lambda functions automatically become serializable. |
| */ |
| public interface SerializableFunction<A, B> extends Function<A, B>, |
| Serializable { |
| } |
