com.twitter.heron.streamlet.Builder 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 com.twitter.heron.streamlet.impl.BuilderImpl;
/**
* Builder is used to register all sources. Builder thus keeps track
* of all the starting points of the computation dag and uses this
* information to build the topology
*/
public interface Builder {
static Builder newBuilder() {
return new BuilderImpl();
}
/**
* All sources of the computation should register using addSource.
* @param supplier The supplier function that is used to create the streamlet
*/
Streamlet newSource(SerializableSupplier supplier);
/**
* Creates a new Streamlet using the underlying generator
* @param generator The generator that generates the tuples of the streamlet
* @param
* @return
*/
Streamlet newSource(Source generator);
}