kafka RemoteLogMetadataTransform 源码
kafka RemoteLogMetadataTransform 代码
文件路径：/storage/src/main/java/org/apache/kafka/server/log/remote/metadata/storage/serialization/RemoteLogMetadataTransform.java
/*
* 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.server.log.remote.metadata.storage.serialization;
import org.apache.kafka.server.common.ApiMessageAndVersion;
import org.apache.kafka.server.log.remote.storage.RemoteLogMetadata;
/**
* This interface is about transforming {@link RemoteLogMetadata} objects into the respective {@link ApiMessageAndVersion} or vice versa.
* <p></p>
* Those metadata objects can be {@link org.apache.kafka.server.log.remote.storage.RemoteLogSegmentMetadata},
* {@link org.apache.kafka.server.log.remote.storage.RemoteLogSegmentMetadataUpdate}, or {@link org.apache.kafka.server.log.remote.storage.RemotePartitionDeleteMetadata}.
* <p>
* @param <T> metadata type.
*
* @see RemoteLogSegmentMetadataTransform
* @see RemoteLogSegmentMetadataUpdateTransform
* @see RemotePartitionDeleteMetadataTransform
*/
public interface RemoteLogMetadataTransform<T extends RemoteLogMetadata> {
/**
* Transforms the given {@code metadata} object into the respective {@code ApiMessageAndVersion} object.
*
* @param metadata metadata object to be transformed.
* @return transformed {@code ApiMessageAndVersion} object.
*/
ApiMessageAndVersion toApiMessageAndVersion(T metadata);
/**
* Return the metadata object transformed from the given {@code apiMessageAndVersion}.
*
* @param apiMessageAndVersion ApiMessageAndVersion object to be transformed.
* @return transformed {@code T} metadata object.
*/
T fromApiMessageAndVersion(ApiMessageAndVersion apiMessageAndVersion);
}
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