kafka FindCoordinatorResponse 源码
kafka FindCoordinatorResponse 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/requests/FindCoordinatorResponse.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.Node;
import org.apache.kafka.common.message.FindCoordinatorResponseData;
import org.apache.kafka.common.message.FindCoordinatorResponseData.Coordinator;
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.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class FindCoordinatorResponse extends AbstractResponse {
/**
* Possible error codes:
*
* COORDINATOR_LOAD_IN_PROGRESS (14)
* COORDINATOR_NOT_AVAILABLE (15)
* GROUP_AUTHORIZATION_FAILED (30)
* INVALID_REQUEST (42)
* TRANSACTIONAL_ID_AUTHORIZATION_FAILED (53)
*/
private final FindCoordinatorResponseData data;
public FindCoordinatorResponse(FindCoordinatorResponseData data) {
super(ApiKeys.FIND_COORDINATOR);
this.data = data;
}
@Override
public FindCoordinatorResponseData data() {
return data;
}
public Node node() {
return new Node(data.nodeId(), data.host(), data.port());
}
@Override
public int throttleTimeMs() {
return data.throttleTimeMs();
}
@Override
public void maybeSetThrottleTimeMs(int throttleTimeMs) {
data.setThrottleTimeMs(throttleTimeMs);
}
public boolean hasError() {
return error() != Errors.NONE;
}
public Errors error() {
return Errors.forCode(data.errorCode());
}
@Override
public Map<Errors, Integer> errorCounts() {
if (!data.coordinators().isEmpty()) {
Map<Errors, Integer> errorCounts = new HashMap<>();
for (Coordinator coordinator : data.coordinators()) {
updateErrorCounts(errorCounts, Errors.forCode(coordinator.errorCode()));
}
return errorCounts;
} else {
return errorCounts(error());
}
}
public static FindCoordinatorResponse parse(ByteBuffer buffer, short version) {
return new FindCoordinatorResponse(new FindCoordinatorResponseData(new ByteBufferAccessor(buffer), version));
}
@Override
public String toString() {
return data.toString();
}
@Override
public boolean shouldClientThrottle(short version) {
return version >= 2;
}
public List<FindCoordinatorResponseData.Coordinator> coordinators() {
if (!data.coordinators().isEmpty())
return data.coordinators();
else {
FindCoordinatorResponseData.Coordinator coordinator = new Coordinator()
.setErrorCode(data.errorCode())
.setErrorMessage(data.errorMessage())
.setKey(null)
.setNodeId(data.nodeId())
.setHost(data.host())
.setPort(data.port());
return Collections.singletonList(coordinator);
}
}
public static FindCoordinatorResponse prepareOldResponse(Errors error, Node node) {
FindCoordinatorResponseData data = new FindCoordinatorResponseData();
data.setErrorCode(error.code())
.setErrorMessage(error.message())
.setNodeId(node.id())
.setHost(node.host())
.setPort(node.port());
return new FindCoordinatorResponse(data);
}
public static FindCoordinatorResponse prepareResponse(Errors error, String key, Node node) {
FindCoordinatorResponseData data = new FindCoordinatorResponseData();
data.setCoordinators(Collections.singletonList(
new FindCoordinatorResponseData.Coordinator()
.setErrorCode(error.code())
.setErrorMessage(error.message())
.setKey(key)
.setHost(node.host())
.setPort(node.port())
.setNodeId(node.id())));
return new FindCoordinatorResponse(data);
}
public static FindCoordinatorResponse prepareErrorResponse(Errors error, List<String> keys) {
FindCoordinatorResponseData data = new FindCoordinatorResponseData();
List<FindCoordinatorResponseData.Coordinator> coordinators = new ArrayList<>(keys.size());
for (String key : keys) {
FindCoordinatorResponseData.Coordinator coordinator = new FindCoordinatorResponseData.Coordinator()
.setErrorCode(error.code())
.setErrorMessage(error.message())
.setKey(key)
.setHost(Node.noNode().host())
.setPort(Node.noNode().port())
.setNodeId(Node.noNode().id());
coordinators.add(coordinator);
}
data.setCoordinators(coordinators);
return new FindCoordinatorResponse(data);
}
}
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