| /* |
| * 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.flink.table.runtime.window.internal; |
| |
| import org.apache.flink.table.api.window.Window; |
| import org.apache.flink.table.dataformat.BaseRow; |
| import org.apache.flink.table.runtime.functions.SubKeyedAggsHandleFunction; |
| import org.apache.flink.table.runtime.window.assigners.PanedWindowAssigner; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * The implementation of {@link InternalWindowProcessFunction} for {@link PanedWindowAssigner}. |
| * @param <W> The type of {@code Window} that assigner assigns. |
| */ |
| public class PanedWindowProcessFunction<K, W extends Window> |
| extends InternalWindowProcessFunction<K, W> { |
| |
| private static final long serialVersionUID = 4259335376102569987L; |
| |
| private final PanedWindowAssigner<W> windowAssigner; |
| |
| public PanedWindowProcessFunction( |
| PanedWindowAssigner<W> windowAssigner, |
| SubKeyedAggsHandleFunction<W> windowAggregator, |
| long allowedLateness) { |
| |
| super(windowAssigner, windowAggregator, allowedLateness); |
| this.windowAssigner = windowAssigner; |
| } |
| |
| @Override |
| public Collection<W> assignActualWindows(BaseRow inputRow, long timestamp) throws Exception { |
| Collection<W> elementWindows = windowAssigner.assignWindows(inputRow, timestamp); |
| List<W> actualWindows = new ArrayList<>(elementWindows.size()); |
| for (W window : elementWindows) { |
| if (!isWindowLate(window)) { |
| actualWindows.add(window); |
| } |
| } |
| return actualWindows; |
| } |
| |
| @Override |
| public Collection<W> assignStateNamespace(BaseRow inputRow, long timestamp) throws Exception { |
| W pane = windowAssigner.assignPane(inputRow, timestamp); |
| if (!isPaneLate(pane)) { |
| return Collections.singleton(pane); |
| } else { |
| return Collections.emptyList(); |
| } |
| } |
| |
| @Override |
| public BaseRow getWindowAggregationResult(W window) throws Exception { |
| Iterable<W> panes = windowAssigner.splitIntoPanes(window); |
| BaseRow acc = windowAggregator.createAccumulators(); |
| // null namespace means use heap data views |
| windowAggregator.setAccumulators(null, acc); |
| for (W pane : panes) { |
| BaseRow paneAcc = ctx.getWindowAccumulators(pane); |
| if (paneAcc != null) { |
| windowAggregator.merge(pane, paneAcc); |
| } |
| } |
| return windowAggregator.getValue(window); |
| } |
| |
| @Override |
| public void cleanWindowIfNeeded(W window, long currentTime) throws Exception { |
| if (isCleanupTime(window, currentTime)) { |
| Iterable<W> panes = windowAssigner.splitIntoPanes(window); |
| for (W pane : panes) { |
| W lastWindow = windowAssigner.getLastWindow(pane); |
| if (window.equals(lastWindow)) { |
| ctx.clearWindowState(pane); |
| } |
| } |
| ctx.clearTrigger(window); |
| ctx.clearPreviousState(window); |
| } |
| } |
| |
| /** checks whether the pane is late (e.g. can be / has been cleanup) */ |
| private boolean isPaneLate(W pane) { |
| // whether the pane is late depends on the last window which the pane is belongs to is late |
| return windowAssigner.isEventTime() && isWindowLate(windowAssigner.getLastWindow(pane)); |
| } |
| } |