kafka ConsumerGroupMetadata 源码
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);
}
}
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