kafka SyncGroupRequest 源码

kafka SyncGroupRequest 代码

文件路径：/clients/src/main/java/org/apache/kafka/common/requests/SyncGroupRequest.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.errors.UnsupportedVersionException;
import org.apache.kafka.common.message.SyncGroupRequestData;
import org.apache.kafka.common.message.SyncGroupResponseData;
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.Map;

public class SyncGroupRequest extends AbstractRequest {

    public static class Builder extends AbstractRequest.Builder<SyncGroupRequest> {

        private final SyncGroupRequestData data;

        public Builder(SyncGroupRequestData data) {
            super(ApiKeys.SYNC_GROUP);
            this.data = data;
        }

        @Override
        public SyncGroupRequest build(short version) {
            if (data.groupInstanceId() != null && version < 3) {
                throw new UnsupportedVersionException("The broker sync group protocol version " +
                        version + " does not support usage of config group.instance.id.");
            }
            return new SyncGroupRequest(data, version);
        }

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

    private final SyncGroupRequestData data;

    public SyncGroupRequest(SyncGroupRequestData data, short version) {
        super(ApiKeys.SYNC_GROUP, version);
        this.data = data;
    }

    @Override
    public AbstractResponse getErrorResponse(int throttleTimeMs, Throwable e) {
        return new SyncGroupResponse(new SyncGroupResponseData()
                .setErrorCode(Errors.forException(e).code())
                .setAssignment(new byte[0])
                .setThrottleTimeMs(throttleTimeMs));
    }

    public Map<String, ByteBuffer> groupAssignments() {
        Map<String, ByteBuffer> groupAssignments = new HashMap<>();
        for (SyncGroupRequestData.SyncGroupRequestAssignment assignment : data.assignments()) {
            groupAssignments.put(assignment.memberId(), ByteBuffer.wrap(assignment.assignment()));
        }
        return groupAssignments;
    }

    /**
     * ProtocolType and ProtocolName are mandatory since version 5. This methods verifies that
     * they are defined for version 5 or higher, or returns true otherwise for older versions.
     */
    public boolean areMandatoryProtocolTypeAndNamePresent() {
        if (version() >= 5)
            return data.protocolType() != null && data.protocolName() != null;
        else
            return true;
    }

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

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

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