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KAFKA-18013: Add AutoOffsetResetStrategy internal class (apache#17858)
- Deprecates OffsetResetStrategy enum - Adds new internal class AutoOffsetResetStrategy - Replaces all OffsetResetStrategy enum usages with AutoOffsetResetStrategy - Deprecate old/Add new constructors to MockConsumer Reviewers: Andrew Schofield <aschofield@confluent.io>, Matthias J. Sax <matthias@confluent.io>
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105 changes: 105 additions & 0 deletions
105
...ts/src/main/java/org/apache/kafka/clients/consumer/internals/AutoOffsetResetStrategy.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * 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.kafka.clients.consumer.internals; | ||
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|
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| import org.apache.kafka.common.config.ConfigDef; | ||
| import org.apache.kafka.common.config.ConfigException; | ||
| import org.apache.kafka.common.utils.Utils; | ||
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| import java.util.Arrays; | ||
| import java.util.Locale; | ||
| import java.util.Objects; | ||
|
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| public class AutoOffsetResetStrategy { | ||
| private enum StrategyType { | ||
| LATEST, EARLIEST, NONE; | ||
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| @Override | ||
| public String toString() { | ||
| return super.toString().toLowerCase(Locale.ROOT); | ||
| } | ||
| } | ||
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| public static final AutoOffsetResetStrategy EARLIEST = new AutoOffsetResetStrategy(StrategyType.EARLIEST); | ||
| public static final AutoOffsetResetStrategy LATEST = new AutoOffsetResetStrategy(StrategyType.LATEST); | ||
| public static final AutoOffsetResetStrategy NONE = new AutoOffsetResetStrategy(StrategyType.NONE); | ||
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| private final StrategyType type; | ||
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| private AutoOffsetResetStrategy(StrategyType type) { | ||
| this.type = type; | ||
| } | ||
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| public static boolean isValid(String offsetStrategy) { | ||
| return Arrays.asList(Utils.enumOptions(StrategyType.class)).contains(offsetStrategy); | ||
| } | ||
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| public static AutoOffsetResetStrategy fromString(String offsetStrategy) { | ||
| if (offsetStrategy == null || !isValid(offsetStrategy)) { | ||
| throw new IllegalArgumentException("Unknown auto offset reset strategy: " + offsetStrategy); | ||
| } | ||
| StrategyType type = StrategyType.valueOf(offsetStrategy.toUpperCase(Locale.ROOT)); | ||
| switch (type) { | ||
| case EARLIEST: | ||
| return EARLIEST; | ||
| case LATEST: | ||
| return LATEST; | ||
| case NONE: | ||
| return NONE; | ||
| default: | ||
| throw new IllegalArgumentException("Unknown auto offset reset strategy: " + offsetStrategy); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Returns the name of the offset reset strategy. | ||
| */ | ||
| public String name() { | ||
| return type.toString(); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| AutoOffsetResetStrategy that = (AutoOffsetResetStrategy) o; | ||
| return Objects.equals(type, that.type); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hashCode(type); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "AutoOffsetResetStrategy{" + | ||
| "type='" + type + '\'' + | ||
| '}'; | ||
| } | ||
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| public static class Validator implements ConfigDef.Validator { | ||
| @Override | ||
| public void ensureValid(String name, Object value) { | ||
| String strategy = (String) value; | ||
| if (!AutoOffsetResetStrategy.isValid(strategy)) { | ||
| throw new ConfigException(name, value, "Invalid value " + strategy + " for configuration " + | ||
| name + ": the value must be either 'earliest', 'latest', or 'none'."); | ||
| } | ||
| } | ||
| } | ||
| } |
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