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Google Cloud Dataflow Java SDK provides a simple, Java-based
interface for processing virtually any size data using Google cloud
resources. This artifact includes entire Dataflow Java SDK.
/*
* 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
* the License.
*/
package com.google.cloud.dataflow.sdk.util;
import static com.google.common.base.Preconditions.checkState;
import com.google.cloud.dataflow.sdk.transforms.windowing.AfterWatermark;
import com.google.cloud.dataflow.sdk.transforms.windowing.PaneInfo;
import com.google.cloud.dataflow.sdk.transforms.windowing.PaneInfo.PaneInfoCoder;
import com.google.cloud.dataflow.sdk.transforms.windowing.PaneInfo.Timing;
import com.google.cloud.dataflow.sdk.util.state.ReadableState;
import com.google.cloud.dataflow.sdk.util.state.StateAccessor;
import com.google.cloud.dataflow.sdk.util.state.StateTag;
import com.google.cloud.dataflow.sdk.util.state.StateTags;
import com.google.cloud.dataflow.sdk.util.state.ValueState;
import com.google.common.annotations.VisibleForTesting;
import org.joda.time.Instant;
/**
* Determine the timing and other properties of a new pane for a given computation, key and window.
* Incorporates any previous pane, whether the pane has been produced because an
* on-time {@link AfterWatermark} trigger firing, and the relation between the element's timestamp
* and the current output watermark.
*/
public class PaneInfoTracker {
private TimerInternals timerInternals;
public PaneInfoTracker(TimerInternals timerInternals) {
this.timerInternals = timerInternals;
}
@VisibleForTesting
static final StateTag