kafka LeaveGroupResponse 源码

  • 2022-10-20
  • 浏览 (517)

kafka LeaveGroupResponse 代码

文件路径:/clients/src/main/java/org/apache/kafka/common/requests/LeaveGroupResponse.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.common.requests;

import org.apache.kafka.common.message.LeaveGroupResponseData;
import org.apache.kafka.common.message.LeaveGroupResponseData.MemberResponse;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.ByteBufferAccessor;
import org.apache.kafka.common.protocol.Errors;

import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
 * Possible error codes.
 *
 * Top level errors:
 * - {@link Errors#COORDINATOR_LOAD_IN_PROGRESS}
 * - {@link Errors#COORDINATOR_NOT_AVAILABLE}
 * - {@link Errors#NOT_COORDINATOR}
 * - {@link Errors#GROUP_AUTHORIZATION_FAILED}
 *
 * Member level errors:
 * - {@link Errors#FENCED_INSTANCE_ID}
 * - {@link Errors#UNKNOWN_MEMBER_ID}
 *
 * If the top level error code is set, normally this indicates that broker early stops the request
 * handling due to some severe global error, so it is expected to see the member level errors to be empty.
 * For older version response, we may populate member level error towards top level because older client
 * couldn't parse member level.
 */
public class LeaveGroupResponse extends AbstractResponse {

    private final LeaveGroupResponseData data;

    public LeaveGroupResponse(LeaveGroupResponseData data) {
        super(ApiKeys.LEAVE_GROUP);
        this.data = data;
    }

    public LeaveGroupResponse(List<MemberResponse> memberResponses,
                              Errors topLevelError,
                              final int throttleTimeMs,
                              final short version) {
        super(ApiKeys.LEAVE_GROUP);
        if (version <= 2) {
            // Populate member level error.
            final short errorCode = getError(topLevelError, memberResponses).code();

            this.data = new LeaveGroupResponseData()
                            .setErrorCode(errorCode);
        } else {
            this.data = new LeaveGroupResponseData()
                            .setErrorCode(topLevelError.code())
                            .setMembers(memberResponses);
        }

        if (version >= 1) {
            this.data.setThrottleTimeMs(throttleTimeMs);
        }
    }

    @Override
    public int throttleTimeMs() {
        return data.throttleTimeMs();
    }

    @Override
    public void maybeSetThrottleTimeMs(int throttleTimeMs) {
        data.setThrottleTimeMs(throttleTimeMs);
    }

    public List<MemberResponse> memberResponses() {
        return data.members();
    }

    public Errors error() {
        return getError(Errors.forCode(data.errorCode()), data.members());
    }

    public Errors topLevelError() {
        return Errors.forCode(data.errorCode());
    }

    private static Errors getError(Errors topLevelError, List<MemberResponse> memberResponses) {
        if (topLevelError != Errors.NONE) {
            return topLevelError;
        } else {
            for (MemberResponse memberResponse : memberResponses) {
                Errors memberError = Errors.forCode(memberResponse.errorCode());
                if (memberError != Errors.NONE) {
                    return memberError;
                }
            }
            return Errors.NONE;
        }
    }

    @Override
    public Map<Errors, Integer> errorCounts() {
        Map<Errors, Integer> combinedErrorCounts = new HashMap<>();
        // Top level error.
        updateErrorCounts(combinedErrorCounts, Errors.forCode(data.errorCode()));

        // Member level error.
        data.members().forEach(memberResponse -> {
            updateErrorCounts(combinedErrorCounts, Errors.forCode(memberResponse.errorCode()));
        });
        return combinedErrorCounts;
    }

    @Override
    public LeaveGroupResponseData data() {
        return data;
    }

    public static LeaveGroupResponse parse(ByteBuffer buffer, short version) {
        return new LeaveGroupResponse(new LeaveGroupResponseData(new ByteBufferAccessor(buffer), version));
    }

    @Override
    public boolean shouldClientThrottle(short version) {
        return version >= 2;
    }

    @Override
    public boolean equals(Object other) {
        return other instanceof LeaveGroupResponse &&
                   ((LeaveGroupResponse) other).data.equals(this.data);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(data);
    }

    @Override
    public String toString() {
        return data.toString();
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbstractControlRequest 源码

kafka AbstractRequest 源码

kafka AbstractRequestResponse 源码

kafka AbstractResponse 源码

kafka AddOffsetsToTxnRequest 源码

kafka AddOffsetsToTxnResponse 源码

kafka AddPartitionsToTxnRequest 源码

kafka AddPartitionsToTxnResponse 源码

kafka AllocateProducerIdsRequest 源码

kafka AllocateProducerIdsResponse 源码

0  赞