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[FLINK-11959][table-runtime-blink] Introduce window operator for blin…
…k streaming runtime This closes apache#8058.
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160 changes: 160 additions & 0 deletions
160
...link-table-runtime-blink/src/main/java/org/apache/flink/table/api/window/CountWindow.java
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| /* | ||
| * 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:https://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. | ||
| */ | ||
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| package org.apache.flink.table.api.window; | ||
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| import org.apache.flink.api.common.typeutils.SimpleTypeSerializerSnapshot; | ||
| import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot; | ||
| import org.apache.flink.api.common.typeutils.base.TypeSerializerSingleton; | ||
| import org.apache.flink.core.memory.DataInputView; | ||
| import org.apache.flink.core.memory.DataOutputView; | ||
| import org.apache.flink.util.MathUtils; | ||
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| import java.io.IOException; | ||
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| /** | ||
| * A {@link Window} that represents a count window. For each count window, we will assign a unique | ||
| * id. Thus this CountWindow can act as namespace part in state. We can attach data to each | ||
| * different CountWindow. | ||
| */ | ||
| public class CountWindow extends Window { | ||
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| private final long id; | ||
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| public CountWindow(long id) { | ||
| this.id = id; | ||
| } | ||
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| /** | ||
| * Gets the id (0-based) of the window. | ||
| */ | ||
| public long getId() { | ||
| return id; | ||
| } | ||
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| @Override | ||
| public long maxTimestamp() { | ||
| return Long.MAX_VALUE; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
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| CountWindow window = (CountWindow) o; | ||
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| return id == window.id; | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return MathUtils.longToIntWithBitMixing(id); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "CountWindow{" + | ||
| "id=" + id + '}'; | ||
| } | ||
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| @Override | ||
| public int compareTo(Window o) { | ||
| CountWindow that = (CountWindow) o; | ||
| return Long.compare(this.id, that.id); | ||
| } | ||
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| // ------------------------------------------------------------------------ | ||
| // Serializer | ||
| // ------------------------------------------------------------------------ | ||
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| /** | ||
| * The serializer used to write the CountWindow type. | ||
| */ | ||
| public static class Serializer extends TypeSerializerSingleton<CountWindow> { | ||
| private static final long serialVersionUID = 1L; | ||
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| @Override | ||
| public boolean isImmutableType() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public CountWindow createInstance() { | ||
| return null; | ||
| } | ||
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| @Override | ||
| public CountWindow copy(CountWindow from) { | ||
| return from; | ||
| } | ||
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| @Override | ||
| public CountWindow copy(CountWindow from, CountWindow reuse) { | ||
| return from; | ||
| } | ||
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| @Override | ||
| public int getLength() { | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public void serialize(CountWindow record, DataOutputView target) throws IOException { | ||
| target.writeLong(record.id); | ||
| } | ||
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| @Override | ||
| public CountWindow deserialize(DataInputView source) throws IOException { | ||
| return new CountWindow(source.readLong()); | ||
| } | ||
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| @Override | ||
| public CountWindow deserialize(CountWindow reuse, DataInputView source) throws IOException { | ||
| return deserialize(source); | ||
| } | ||
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| @Override | ||
| public void copy(DataInputView source, DataOutputView target) throws IOException { | ||
| target.writeLong(source.readLong()); | ||
| } | ||
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| // ------------------------------------------------------------------------ | ||
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| @Override | ||
| public TypeSerializerSnapshot<CountWindow> snapshotConfiguration() { | ||
| return new CountWindow.Serializer.CountWindowSerializerSnapshot(); | ||
| } | ||
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| /** | ||
| * Serializer configuration snapshot for compatibility and format evolution. | ||
| */ | ||
| @SuppressWarnings("WeakerAccess") | ||
| public static final class CountWindowSerializerSnapshot extends SimpleTypeSerializerSnapshot<CountWindow> { | ||
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| public CountWindowSerializerSnapshot() { | ||
| super(CountWindow.Serializer::new); | ||
| } | ||
| } | ||
| } | ||
| } |
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