kafka TopicDescription 源码

kafka TopicDescription 代码

文件路径：/clients/src/main/java/org/apache/kafka/clients/admin/TopicDescription.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.clients.admin;

import org.apache.kafka.common.TopicPartitionInfo;
import org.apache.kafka.common.Uuid;
import org.apache.kafka.common.acl.AclOperation;
import org.apache.kafka.common.utils.Utils;

import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.Set;

/**
 * A detailed description of a single topic in the cluster.
 */
public class TopicDescription {
    private final String name;
    private final boolean internal;
    private final List<TopicPartitionInfo> partitions;
    private final Set<AclOperation> authorizedOperations;
    private final Uuid topicId;

    @Override
    public boolean equals(final Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        final TopicDescription that = (TopicDescription) o;
        return internal == that.internal &&
            Objects.equals(name, that.name) &&
            Objects.equals(partitions, that.partitions) &&
            Objects.equals(authorizedOperations, that.authorizedOperations);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, internal, partitions, authorizedOperations);
    }

    /**
     * Create an instance with the specified parameters.
     *
     * @param name The topic name
     * @param internal Whether the topic is internal to Kafka
     * @param partitions A list of partitions where the index represents the partition id and the element contains
     *                   leadership and replica information for that partition.
     */
    public TopicDescription(String name, boolean internal, List<TopicPartitionInfo> partitions) {
        this(name, internal, partitions, Collections.emptySet());
    }

    /**
     * Create an instance with the specified parameters.
     *
     * @param name The topic name
     * @param internal Whether the topic is internal to Kafka
     * @param partitions A list of partitions where the index represents the partition id and the element contains
     *                   leadership and replica information for that partition.
     * @param authorizedOperations authorized operations for this topic, or empty set if this is not known.
     */
    public TopicDescription(String name, boolean internal, List<TopicPartitionInfo> partitions,
                            Set<AclOperation> authorizedOperations) {
        this(name, internal, partitions, authorizedOperations, Uuid.ZERO_UUID);
    }

    /**
     * Create an instance with the specified parameters.
     *
     * @param name The topic name
     * @param internal Whether the topic is internal to Kafka
     * @param partitions A list of partitions where the index represents the partition id and the element contains
     *                   leadership and replica information for that partition.
     * @param authorizedOperations authorized operations for this topic, or empty set if this is not known.
     * @param topicId the topic id
     */
    public TopicDescription(String name, boolean internal, List<TopicPartitionInfo> partitions,
                            Set<AclOperation> authorizedOperations, Uuid topicId) {
        this.name = name;
        this.internal = internal;
        this.partitions = partitions;
        this.authorizedOperations = authorizedOperations;
        this.topicId = topicId;
    }

    /**
     * The name of the topic.
     */
    public String name() {
        return name;
    }

    /**
     * Whether the topic is internal to Kafka. An example of an internal topic is the offsets and group management topic:
     * __consumer_offsets.
     */
    public boolean isInternal() {
        return internal;
    }

    public Uuid topicId() {
        return topicId;
    }

    /**
     * A list of partitions where the index represents the partition id and the element contains leadership and replica
     * information for that partition.
     */
    public List<TopicPartitionInfo> partitions() {
        return partitions;
    }

    /**
     * authorized operations for this topic, or null if this is not known.
     */
    public Set<AclOperation>  authorizedOperations() {
        return authorizedOperations;
    }

    @Override
    public String toString() {
        return "(name=" + name + ", internal=" + internal + ", partitions=" +
            Utils.join(partitions, ",") + ", authorizedOperations=" + authorizedOperations + ")";
    }
}

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