kafka ConsumerGroupMetadata 源码

  • 2022-10-20
  • 浏览 (501)

kafka ConsumerGroupMetadata 代码

文件路径:/clients/src/main/java/org/apache/kafka/clients/consumer/ConsumerGroupMetadata.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.consumer;

import org.apache.kafka.common.requests.JoinGroupRequest;

import java.util.Objects;
import java.util.Optional;

/**
 * A metadata struct containing the consumer group information.
 * Note: Any change to this class is considered public and requires a KIP.
 */
public class ConsumerGroupMetadata {
    final private String groupId;
    final private int generationId;
    final private String memberId;
    final private Optional<String> groupInstanceId;

    public ConsumerGroupMetadata(String groupId,
                                 int generationId,
                                 String memberId,
                                 Optional<String> groupInstanceId) {
        this.groupId = Objects.requireNonNull(groupId, "group.id can't be null");
        this.generationId = generationId;
        this.memberId = Objects.requireNonNull(memberId, "member.id can't be null");
        this.groupInstanceId = Objects.requireNonNull(groupInstanceId, "group.instance.id can't be null");
    }

    public ConsumerGroupMetadata(String groupId) {
        this(groupId,
            JoinGroupRequest.UNKNOWN_GENERATION_ID,
            JoinGroupRequest.UNKNOWN_MEMBER_ID,
            Optional.empty());
    }

    public String groupId() {
        return groupId;
    }

    public int generationId() {
        return generationId;
    }

    public String memberId() {
        return memberId;
    }

    public Optional<String> groupInstanceId() {
        return groupInstanceId;
    }

    @Override
    public String toString() {
        return String.format("GroupMetadata(groupId = %s, generationId = %d, memberId = %s, groupInstanceId = %s)",
            groupId,
            generationId,
            memberId,
            groupInstanceId.orElse(""));
    }

    @Override
    public boolean equals(final Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        final ConsumerGroupMetadata that = (ConsumerGroupMetadata) o;
        return generationId == that.generationId &&
            Objects.equals(groupId, that.groupId) &&
            Objects.equals(memberId, that.memberId) &&
            Objects.equals(groupInstanceId, that.groupInstanceId);
    }

    @Override
    public int hashCode() {
        return Objects.hash(groupId, generationId, memberId, groupInstanceId);
    }

}

相关信息

kafka 源码目录

相关文章

kafka CommitFailedException 源码

kafka Consumer 源码

kafka ConsumerConfig 源码

kafka ConsumerInterceptor 源码

kafka ConsumerPartitionAssignor 源码

kafka ConsumerRebalanceListener 源码

kafka ConsumerRecord 源码

kafka ConsumerRecords 源码

kafka CooperativeStickyAssignor 源码

kafka InvalidOffsetException 源码

0  赞