kafka MetadataPublisher 源码
kafka MetadataPublisher 代码
文件路径：/core/src/main/scala/kafka/server/metadata/MetadataPublisher.scala
/**
* 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 kafka.server.metadata
import org.apache.kafka.image.{MetadataDelta, MetadataImage}
/**
* An object which publishes a new metadata image.
*/
trait MetadataPublisher {
/**
* Publish a new metadata image.
*
* @param delta The delta between the old image and the new one.
* @param newImage The new image, which is the result of applying the
* delta to the previous image.
*/
def publish(delta: MetadataDelta, newImage: MetadataImage): Unit
/**
* The highest offset of metadata topic which has been published
*/
def publishedOffset: Long
}
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