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Introduce version merge engine for primary key table
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126 changes: 126 additions & 0 deletions
126
fluss-common/src/main/java/com/alibaba/fluss/config/MergeEngine.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| /* | ||
| * Copyright (c) 2024 Alibaba Group Holding Ltd. | ||
| * | ||
| * 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.alibaba.fluss.config; | ||
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|
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| import com.alibaba.fluss.shaded.guava32.com.google.common.collect.Sets; | ||
| import com.alibaba.fluss.types.*; | ||
|
|
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| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.Set; | ||
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| /** The merge engine for primary key table. */ | ||
| public class MergeEngine { | ||
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| public static final Set<String> VERSION_SUPPORTED_DATA_TYPES = | ||
| Sets.newHashSet( | ||
| BigIntType.class.getName(), | ||
| IntType.class.getName(), | ||
| TimestampType.class.getName(), | ||
| TimeType.class.getName(), | ||
| LocalZonedTimestampType.class.getName()); | ||
| private final Type type; | ||
| private final String column; | ||
|
|
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| private MergeEngine(Type type) { | ||
| this(type, null); | ||
| } | ||
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| private MergeEngine(Type type, String column) { | ||
| this.type = type; | ||
| this.column = column; | ||
| } | ||
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| public static MergeEngine create(Map<String, String> properties, RowType rowType) { | ||
| return create(Configuration.fromMap(properties), rowType); | ||
| } | ||
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| public static MergeEngine create(Configuration options, RowType rowType) { | ||
| if (options == null) { | ||
| return null; | ||
| } | ||
| MergeEngine.Type type = options.get(ConfigOptions.TABLE_MERGE_ENGINE); | ||
| if (type == null) { | ||
| return null; | ||
| } | ||
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| switch (type) { | ||
| case FIRST_ROW: | ||
| return new MergeEngine(Type.FIRST_ROW); | ||
| case VERSION: | ||
| String column = options.get(ConfigOptions.TABLE_MERGE_ENGINE_VERSION_COLUMN); | ||
| if (column == null) { | ||
| throw new IllegalArgumentException( | ||
| "When the merge engine is set to version, the 'table.merge-engine.version.column' cannot be empty."); | ||
| } | ||
| int fieldIndex = rowType.getFieldIndex(column); | ||
| if (fieldIndex == -1) { | ||
| throw new IllegalArgumentException( | ||
| String.format( | ||
| "When the merge engine is set to version, the column %s does not exist.", | ||
| column)); | ||
| } | ||
| DataType dataType = rowType.getTypeAt(fieldIndex); | ||
| if (!VERSION_SUPPORTED_DATA_TYPES.contains(dataType.getClass().getName())) { | ||
| throw new IllegalArgumentException( | ||
| String.format( | ||
| "The merge engine column is not support type %s .", | ||
| dataType.asSummaryString())); | ||
| } | ||
| return new MergeEngine(Type.VERSION, column); | ||
| default: | ||
| throw new UnsupportedOperationException("Unsupported merge engine: " + type); | ||
| } | ||
| } | ||
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| public Type getType() { | ||
| return type; | ||
| } | ||
|
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| public String getColumn() { | ||
| return column; | ||
| } | ||
|
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| public enum Type { | ||
| FIRST_ROW("first_row"), | ||
| VERSION("version"); | ||
| private final String value; | ||
|
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| Type(String value) { | ||
| this.value = value; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return value; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| MergeEngine that = (MergeEngine) o; | ||
| return type == that.type && Objects.equals(column, that.column); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(type, column); | ||
| } | ||
| } |
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