kafka RemoveMembersFromConsumerGroupHandler 源码
kafka RemoveMembersFromConsumerGroupHandler 代码
文件路径:/clients/src/main/java/org/apache/kafka/clients/admin/internals/RemoveMembersFromConsumerGroupHandler.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.internals;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.kafka.common.Node;
import org.apache.kafka.common.message.LeaveGroupRequestData.MemberIdentity;
import org.apache.kafka.common.message.LeaveGroupResponseData.MemberResponse;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.requests.AbstractResponse;
import org.apache.kafka.common.requests.LeaveGroupRequest;
import org.apache.kafka.common.requests.LeaveGroupResponse;
import org.apache.kafka.common.requests.FindCoordinatorRequest.CoordinatorType;
import org.apache.kafka.common.utils.LogContext;
import org.slf4j.Logger;
public class RemoveMembersFromConsumerGroupHandler extends AdminApiHandler.Batched<CoordinatorKey, Map<MemberIdentity, Errors>> {
private final CoordinatorKey groupId;
private final List<MemberIdentity> members;
private final Logger log;
private final AdminApiLookupStrategy<CoordinatorKey> lookupStrategy;
public RemoveMembersFromConsumerGroupHandler(
String groupId,
List<MemberIdentity> members,
LogContext logContext
) {
this.groupId = CoordinatorKey.byGroupId(groupId);
this.members = members;
this.log = logContext.logger(RemoveMembersFromConsumerGroupHandler.class);
this.lookupStrategy = new CoordinatorStrategy(CoordinatorType.GROUP, logContext);
}
@Override
public String apiName() {
return "leaveGroup";
}
@Override
public AdminApiLookupStrategy<CoordinatorKey> lookupStrategy() {
return lookupStrategy;
}
public static AdminApiFuture.SimpleAdminApiFuture<CoordinatorKey, Map<MemberIdentity, Errors>> newFuture(
String groupId
) {
return AdminApiFuture.forKeys(Collections.singleton(CoordinatorKey.byGroupId(groupId)));
}
private void validateKeys(
Set<CoordinatorKey> groupIds
) {
if (!groupIds.equals(Collections.singleton(groupId))) {
throw new IllegalArgumentException("Received unexpected group ids " + groupIds +
" (expected only " + Collections.singleton(groupId) + ")");
}
}
@Override
public LeaveGroupRequest.Builder buildBatchedRequest(int coordinatorId, Set<CoordinatorKey> groupIds) {
validateKeys(groupIds);
return new LeaveGroupRequest.Builder(groupId.idValue, members);
}
@Override
public ApiResult<CoordinatorKey, Map<MemberIdentity, Errors>> handleResponse(
Node coordinator,
Set<CoordinatorKey> groupIds,
AbstractResponse abstractResponse
) {
validateKeys(groupIds);
final LeaveGroupResponse response = (LeaveGroupResponse) abstractResponse;
final Errors error = response.topLevelError();
if (error != Errors.NONE) {
final Map<CoordinatorKey, Throwable> failed = new HashMap<>();
final Set<CoordinatorKey> groupsToUnmap = new HashSet<>();
handleGroupError(groupId, error, failed, groupsToUnmap);
return new ApiResult<>(Collections.emptyMap(), failed, new ArrayList<>(groupsToUnmap));
} else {
final Map<MemberIdentity, Errors> memberErrors = new HashMap<>();
for (MemberResponse memberResponse : response.memberResponses()) {
memberErrors.put(new MemberIdentity()
.setMemberId(memberResponse.memberId())
.setGroupInstanceId(memberResponse.groupInstanceId()),
Errors.forCode(memberResponse.errorCode()));
}
return ApiResult.completed(groupId, memberErrors);
}
}
private void handleGroupError(
CoordinatorKey groupId,
Errors error,
Map<CoordinatorKey, Throwable> failed,
Set<CoordinatorKey> groupsToUnmap
) {
switch (error) {
case GROUP_AUTHORIZATION_FAILED:
log.debug("`LeaveGroup` request for group id {} failed due to error {}", groupId.idValue, error);
failed.put(groupId, error.exception());
break;
case COORDINATOR_LOAD_IN_PROGRESS:
// If the coordinator is in the middle of loading, then we just need to retry
log.debug("`LeaveGroup` request for group id {} failed because the coordinator " +
"is still in the process of loading state. Will retry", groupId.idValue);
break;
case COORDINATOR_NOT_AVAILABLE:
case NOT_COORDINATOR:
// If the coordinator is unavailable or there was a coordinator change, then we unmap
// the key so that we retry the `FindCoordinator` request
log.debug("`LeaveGroup` request for group id {} returned error {}. " +
"Will attempt to find the coordinator again and retry", groupId.idValue, error);
groupsToUnmap.add(groupId);
break;
default:
log.error("`LeaveGroup` request for group id {} failed due to unexpected error {}", groupId.idValue, error);
failed.put(groupId, error.exception());
}
}
}
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