spring-kafka PartitionOffset 源码
spring-kafka PartitionOffset 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/annotation/PartitionOffset.java
/*
* Copyright 2016-2020 the original author or authors.
*
* 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
*
* 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.
*/
package org.springframework.kafka.annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Used to add partition/initial offset information to a {@code KafkaListener}.
*
* @author Artem Bilan
* @author Gary Russell
*/
@Target({})
@Retention(RetentionPolicy.RUNTIME)
public @interface PartitionOffset {
/**
* The partition within the topic to listen on. Property place holders and SpEL
* expressions are supported, which must resolve to Integer (or String that can be
* parsed as Integer). '*' indicates that the initial offset will be applied to all
* partitions in the encompassing {@link TopicPartition} The string can contain a
* comma-delimited list of partitions, or ranges of partitions (e.g.
* {@code 0-5, 7, 10-15}, in which case, the offset will be applied to all of those
* partitions.
* @return partition within the topic.
*/
String partition();
/**
* The initial offset of the {@link #partition()}.
* Property place holders and SpEL expressions are supported,
* which must resolve to Long (or String that can be parsed as Long).
* @return initial offset.
*/
String initialOffset();
/**
* By default, positive {@link #initialOffset()} is absolute, negative
* is relative to the current topic end. When this is 'true', the
* initial offset (positive or negative) is relative to the current
* consumer position.
* @return whether or not the offset is relative to the current position.
* @since 1.1
*/
String relativeToCurrent() default "false";
}
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