kafka DescribeConsumerGroupsHandler 源码
kafka DescribeConsumerGroupsHandler 代码
文件路径:/clients/src/main/java/org/apache/kafka/clients/admin/internals/DescribeConsumerGroupsHandler.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.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import org.apache.kafka.clients.admin.ConsumerGroupDescription;
import org.apache.kafka.clients.admin.MemberAssignment;
import org.apache.kafka.clients.admin.MemberDescription;
import org.apache.kafka.clients.consumer.ConsumerPartitionAssignor.Assignment;
import org.apache.kafka.clients.consumer.internals.ConsumerProtocol;
import org.apache.kafka.common.ConsumerGroupState;
import org.apache.kafka.common.Node;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.acl.AclOperation;
import org.apache.kafka.common.message.DescribeGroupsRequestData;
import org.apache.kafka.common.message.DescribeGroupsResponseData.DescribedGroup;
import org.apache.kafka.common.message.DescribeGroupsResponseData.DescribedGroupMember;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.requests.AbstractResponse;
import org.apache.kafka.common.requests.DescribeGroupsRequest;
import org.apache.kafka.common.requests.DescribeGroupsResponse;
import org.apache.kafka.common.requests.FindCoordinatorRequest;
import org.apache.kafka.common.requests.MetadataResponse;
import org.apache.kafka.common.requests.FindCoordinatorRequest.CoordinatorType;
import org.apache.kafka.common.utils.LogContext;
import org.apache.kafka.common.utils.Utils;
import org.slf4j.Logger;
public class DescribeConsumerGroupsHandler extends AdminApiHandler.Batched<CoordinatorKey, ConsumerGroupDescription> {
private final boolean includeAuthorizedOperations;
private final Logger log;
private final AdminApiLookupStrategy<CoordinatorKey> lookupStrategy;
public DescribeConsumerGroupsHandler(
boolean includeAuthorizedOperations,
LogContext logContext
) {
this.includeAuthorizedOperations = includeAuthorizedOperations;
this.log = logContext.logger(DescribeConsumerGroupsHandler.class);
this.lookupStrategy = new CoordinatorStrategy(CoordinatorType.GROUP, logContext);
}
private static Set<CoordinatorKey> buildKeySet(Collection<String> groupIds) {
return groupIds.stream()
.map(CoordinatorKey::byGroupId)
.collect(Collectors.toSet());
}
public static AdminApiFuture.SimpleAdminApiFuture<CoordinatorKey, ConsumerGroupDescription> newFuture(
Collection<String> groupIds
) {
return AdminApiFuture.forKeys(buildKeySet(groupIds));
}
@Override
public String apiName() {
return "describeGroups";
}
@Override
public AdminApiLookupStrategy<CoordinatorKey> lookupStrategy() {
return lookupStrategy;
}
@Override
public DescribeGroupsRequest.Builder buildBatchedRequest(int coordinatorId, Set<CoordinatorKey> keys) {
List<String> groupIds = keys.stream().map(key -> {
if (key.type != FindCoordinatorRequest.CoordinatorType.GROUP) {
throw new IllegalArgumentException("Invalid transaction coordinator key " + key +
" when building `DescribeGroups` request");
}
return key.idValue;
}).collect(Collectors.toList());
DescribeGroupsRequestData data = new DescribeGroupsRequestData()
.setGroups(groupIds)
.setIncludeAuthorizedOperations(includeAuthorizedOperations);
return new DescribeGroupsRequest.Builder(data);
}
@Override
public ApiResult<CoordinatorKey, ConsumerGroupDescription> handleResponse(
Node coordinator,
Set<CoordinatorKey> groupIds,
AbstractResponse abstractResponse
) {
final DescribeGroupsResponse response = (DescribeGroupsResponse) abstractResponse;
final Map<CoordinatorKey, ConsumerGroupDescription> completed = new HashMap<>();
final Map<CoordinatorKey, Throwable> failed = new HashMap<>();
final Set<CoordinatorKey> groupsToUnmap = new HashSet<>();
for (DescribedGroup describedGroup : response.data().groups()) {
CoordinatorKey groupIdKey = CoordinatorKey.byGroupId(describedGroup.groupId());
Errors error = Errors.forCode(describedGroup.errorCode());
if (error != Errors.NONE) {
handleError(groupIdKey, error, failed, groupsToUnmap);
continue;
}
final String protocolType = describedGroup.protocolType();
if (protocolType.equals(ConsumerProtocol.PROTOCOL_TYPE) || protocolType.isEmpty()) {
final List<DescribedGroupMember> members = describedGroup.members();
final List<MemberDescription> memberDescriptions = new ArrayList<>(members.size());
final Set<AclOperation> authorizedOperations = validAclOperations(describedGroup.authorizedOperations());
for (DescribedGroupMember groupMember : members) {
Set<TopicPartition> partitions = Collections.emptySet();
if (groupMember.memberAssignment().length > 0) {
final Assignment assignment = ConsumerProtocol.
deserializeAssignment(ByteBuffer.wrap(groupMember.memberAssignment()));
partitions = new HashSet<>(assignment.partitions());
}
memberDescriptions.add(new MemberDescription(
groupMember.memberId(),
Optional.ofNullable(groupMember.groupInstanceId()),
groupMember.clientId(),
groupMember.clientHost(),
new MemberAssignment(partitions)));
}
final ConsumerGroupDescription consumerGroupDescription =
new ConsumerGroupDescription(groupIdKey.idValue, protocolType.isEmpty(),
memberDescriptions,
describedGroup.protocolData(),
ConsumerGroupState.parse(describedGroup.groupState()),
coordinator,
authorizedOperations);
completed.put(groupIdKey, consumerGroupDescription);
} else {
failed.put(groupIdKey, new IllegalArgumentException(
String.format("GroupId %s is not a consumer group (%s).",
groupIdKey.idValue, protocolType)));
}
}
return new ApiResult<>(completed, failed, new ArrayList<>(groupsToUnmap));
}
private void handleError(
CoordinatorKey groupId,
Errors error,
Map<CoordinatorKey, Throwable> failed,
Set<CoordinatorKey> groupsToUnmap
) {
switch (error) {
case GROUP_AUTHORIZATION_FAILED:
log.debug("`DescribeGroups` 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("`DescribeGroups` 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("`DescribeGroups` 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("`DescribeGroups` request for group id {} failed due to unexpected error {}", groupId.idValue, error);
failed.put(groupId, error.exception());
}
}
private Set<AclOperation> validAclOperations(final int authorizedOperations) {
if (authorizedOperations == MetadataResponse.AUTHORIZED_OPERATIONS_OMITTED) {
return null;
}
return Utils.from32BitField(authorizedOperations)
.stream()
.map(AclOperation::fromCode)
.filter(operation -> operation != AclOperation.UNKNOWN
&& operation != AclOperation.ALL
&& operation != AclOperation.ANY)
.collect(Collectors.toSet());
}
}
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