/*
* 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.beam.runners.direct;
import org.apache.beam.sdk.util.WindowedValue;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.PCollectionView;
/**
* A {@link PCollectionViewWriter} is responsible for writing contents of a {@link PCollection} to
* a storage mechanism that can be read from while constructing a {@link PCollectionView}.
*
* @param <ElemT> the type of elements the input {@link PCollection} contains.
* @param <ViewT> the type of the PCollectionView this writer writes to.
*/
interface PCollectionViewWriter<ElemT, ViewT> {
void add(Iterable<WindowedValue<ElemT>> values);
}