kafka LeaveGroupResponse 源码
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();
}
}
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