kafka RemotePartitionDeleteState 源码

  • 2022-10-20
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kafka RemotePartitionDeleteState 代码


 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.kafka.server.log.remote.storage;

import org.apache.kafka.common.annotation.InterfaceStability;

import java.util.Arrays;
import java.util.Collections;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;

 * This enum indicates the deletion state of the remote topic partition. This will be based on the action executed on this
 * partition by the remote log service implementation.
 * State transitions are mentioned below. Self transition is treated as valid. This allows updating with the
 * same state in case of retries and failover.
 * <p>
 * <PRE>
 * +-------------------------+
 * +-----------+-------------+
 *             |
 *             |
 * +-----------v--------------+
 * +-----------+--------------+
 *             |
 *             |
 * +-----------v--------------+
 * +--------------------------+
 * </PRE>
 * </P>
public enum RemotePartitionDeleteState {

     * This is used when a topic/partition is marked for delete by the controller.
     * That means, all its remote log segments are eligible for deletion so that remote partition removers can
     * start deleting them.

     * This state indicates that the partition deletion is started but not yet finished.

     * This state indicates that the partition is deleted successfully.

    private static final Map<Byte, RemotePartitionDeleteState> STATE_TYPES = Collections.unmodifiableMap(
            Arrays.stream(values()).collect(Collectors.toMap(RemotePartitionDeleteState::id, Function.identity())));

    private final byte id;

    RemotePartitionDeleteState(byte id) {
        this.id = id;

    public byte id() {
        return id;

    public static RemotePartitionDeleteState forId(byte id) {
        return STATE_TYPES.get(id);

    public static boolean isValidTransition(RemotePartitionDeleteState srcState,
                                            RemotePartitionDeleteState targetState) {
        Objects.requireNonNull(targetState, "targetState can not be null");

        if (srcState == null) {
            // If the source state is null, check the target state as the initial state viz DELETE_PARTITION_MARKED.
            // This ensures simplicity here as we don't have to define one more type to represent the state 'null' like
            // DELETE_PARTITION_NOT_MARKED, have the null check by the caller and pass that state.
            return targetState == DELETE_PARTITION_MARKED;
        } else if (srcState == targetState) {
            // Self transition is treated as valid. This is to maintain the idempotency for the state in case of retries
            // or failover.
            return true;
        } else if (srcState == DELETE_PARTITION_MARKED) {
            return targetState == DELETE_PARTITION_STARTED;
        } else if (srcState == DELETE_PARTITION_STARTED) {
            return targetState == DELETE_PARTITION_FINISHED;
        } else {
            return false;


kafka 源码目录


kafka LogSegmentData 源码

kafka RemoteLogMetadata 源码

kafka RemoteLogMetadataManager 源码

kafka RemoteLogSegmentId 源码

kafka RemoteLogSegmentMetadata 源码

kafka RemoteLogSegmentMetadataUpdate 源码

kafka RemoteLogSegmentState 源码

kafka RemotePartitionDeleteMetadata 源码

kafka RemoteResourceNotFoundException 源码

kafka RemoteStorageException 源码

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