[GitHub] aljoscha closed pull request #6471: [FLINK-10010][DataStream API] Deprecate unused BaseAlignedWindowAssigner related components

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aljoscha closed pull request #6471: [FLINK-10010][DataStream API] Deprecate unused BaseAlignedWindowAssigner related components
URL: https://github.com/apache/flink/pull/6471
 
 
   

This is a PR merged from a forked repository.
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diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/BaseAlignedWindowAssigner.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/BaseAlignedWindowAssigner.java
index 06e85e45044..bbff850e44c 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/BaseAlignedWindowAssigner.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/BaseAlignedWindowAssigner.java
@@ -27,15 +27,12 @@
 import java.util.Collection;
 
 /**
- * A base {@link WindowAssigner} used to instantiate one of the deprecated
- * {@link org.apache.flink.streaming.runtime.operators.windowing.AccumulatingProcessingTimeWindowOperator
- * AccumulatingProcessingTimeWindowOperator} and
- * {@link org.apache.flink.streaming.runtime.operators.windowing.AggregatingProcessingTimeWindowOperator
- * AggregatingProcessingTimeWindowOperator}.
+ * A base {@link WindowAssigner} used to instantiate one of the deprecated operators.
  *
- * <p>For assigner that extend this one, the user can check the
- * {@link TumblingAlignedProcessingTimeWindows} and the {@link SlidingAlignedProcessingTimeWindows}.
- * */
+ * @deprecated will be removed in a future version. please use other {@link WindowAssigner}s listed under
+ * {@link org.apache.flink.streaming.api.windowing.assigners}.
+ */
+@Deprecated
 public class BaseAlignedWindowAssigner extends WindowAssigner<Object, TimeWindow> {
 
 	private static final long serialVersionUID = -6214980179706960234L;
@@ -57,7 +54,7 @@ public long getSize() {
 
 	@Override
 	public Trigger<Object, TimeWindow> getDefaultTrigger(StreamExecutionEnvironment env) {
-		return null;
+		throw new UnsupportedOperationException("This assigner should not be used with the WindowOperator.");
 	}
 
 	@Override
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/SlidingAlignedProcessingTimeWindows.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/SlidingAlignedProcessingTimeWindows.java
deleted file mode 100644
index dc2984bdc7c..00000000000
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/assigners/SlidingAlignedProcessingTimeWindows.java
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * 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.streaming.api.windowing.assigners;
-
-import org.apache.flink.annotation.PublicEvolving;
-import org.apache.flink.streaming.api.windowing.time.Time;
-
-/**
- * This is a special window assigner used to tell the system to use the
- * <i>"Fast Aligned Processing Time Window Operator"</i> for windowing.
- *
- * <p>Prior Flink versions used that operator automatically for simple processing time
- * windows (tumbling and sliding) when no custom trigger and no evictor was specified.
- * In the current Flink version, that operator is only used when programs explicitly
- * specify this window assigner. This is only intended for special cases where programs relied on
- * the better performance of the fast aligned window operator, and are willing to accept the lack
- * of support for various features as indicated below:
- *
- * <ul>
- *     <li>No custom state backend can be selected, the operator always stores data on the Java heap.</li>
- *     <li>The operator does not support key groups, meaning it cannot change the parallelism.</li>
- *     <li>Future versions of Flink may not be able to resume from checkpoints/savepoints taken by this
- *         operator.</li>
- * </ul>
- *
- * <p>Future implementation plans: We plan to add some of the optimizations used by this operator to
- * the general window operator, so that future versions of Flink will not have the performance/functionality
- * trade-off any more.
- *
- * <p>Note on implementation: The concrete operator instantiated by this assigner is either the
- * {@link org.apache.flink.streaming.runtime.operators.windowing.AggregatingProcessingTimeWindowOperator}
- * or {@link org.apache.flink.streaming.runtime.operators.windowing.AccumulatingProcessingTimeWindowOperator}.
- */
-@PublicEvolving
-public final class SlidingAlignedProcessingTimeWindows extends BaseAlignedWindowAssigner {
-
-	private static final long serialVersionUID = 3695562702662473688L;
-
-	private final long slide;
-
-	public SlidingAlignedProcessingTimeWindows(long size, long slide) {
-		super(size);
-		this.slide = slide;
-	}
-
-	public long getSlide() {
-		return slide;
-	}
-
-	/**
-	 * Creates a new {@code SlidingAlignedProcessingTimeWindows} {@link WindowAssigner} that assigns
-	 * elements to sliding time windows based on the element timestamp.
-	 *
-	 * @param size The size of the generated windows.
-	 * @param slide The slide interval of the generated windows.
-	 */
-	public static SlidingAlignedProcessingTimeWindows of(Time size, Time slide) {
-		return new SlidingAlignedProcessingTimeWindows(size.toMilliseconds(), slide.toMilliseconds());
-	}
-}


 

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