
com.google.cloud.dataflow.sdk.runners.worker.CachingSideInputReader Maven / Gradle / Ivy
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* Copyright (C) 2015 Google Inc.
*
* 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
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package com.google.cloud.dataflow.sdk.runners.worker;
import com.google.cloud.dataflow.sdk.transforms.windowing.BoundedWindow;
import com.google.cloud.dataflow.sdk.util.PCollectionViewWindow;
import com.google.cloud.dataflow.sdk.util.SideInputReader;
import com.google.cloud.dataflow.sdk.util.Sized;
import com.google.cloud.dataflow.sdk.util.SizedSideInputReader;
import com.google.cloud.dataflow.sdk.values.PCollectionView;
import com.google.common.base.Throwables;
import com.google.common.cache.Cache;
import com.google.common.util.concurrent.UncheckedExecutionException;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
/**
* A {@link SideInputReader} that maintains a cache of side inputs per window.
*
* For internal use only.
*
*
Package-private here so that the dependency on Guava does not leak into the public API
* surface. Note that Guava is "shaded" so the {@code Cache} class here is not actually compatible
* with a {@code Cache} created by anything other than the SDK.
*/
final class CachingSideInputReader
extends SizedSideInputReader.Defaults
implements SizedSideInputReader {
private SizedSideInputReader subReader;
private Cache, Sized
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