com.twitter.heron.streamlet.SerializablePredicate Maven / Gradle / Ivy
// 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.streamlet;
import java.io.Serializable;
import java.util.function.Predicate;
/**
* All user supplied transformation functions have to be serializable.
* Thus all Streamlet 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 SerializablePredicate extends Predicate, Serializable {
}