/**
* 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.TopicPartition;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.ProtoUtils;
import org.apache.kafka.common.protocol.types.Schema;
import org.apache.kafka.common.protocol.types.Struct;
import org.apache.kafka.common.utils.CollectionUtils;
import java.nio.ByteBuffer;
import java.util.*;
public class JoinGroupResponse extends AbstractRequestResponse {
public static Schema curSchema = ProtoUtils.currentResponseSchema(ApiKeys.JOIN_GROUP.id);
private static String ERROR_CODE_KEY_NAME = "error_code";
private static String GENERATION_ID_KEY_NAME = "group_generation_id";
private static String CONSUMER_ID_KEY_NAME = "consumer_id";
private static String ASSIGNED_PARTITIONS_KEY_NAME = "assigned_partitions";
private static String TOPIC_KEY_NAME = "topic";
private static String PARTITIONS_KEY_NAME = "partitions";
public static int UNKNOWN_GENERATION_ID = -1;
public static String UNKNOWN_CONSUMER_ID = "";
private final short errorCode;
private final int generationId;
private final String consumerId;
private final List<TopicPartition> assignedPartitions;
public JoinGroupResponse(short errorCode, int generationId, String consumerId, List<TopicPartition> assignedPartitions) {
super(new Struct(curSchema));
Map<String, List<Integer>> partitionsByTopic = CollectionUtils.groupDataByTopic(assignedPartitions);
struct.set(ERROR_CODE_KEY_NAME, errorCode);
struct.set(GENERATION_ID_KEY_NAME, generationId);
struct.set(CONSUMER_ID_KEY_NAME, consumerId);
List<Struct> topicArray = new ArrayList<Struct>();
for (Map.Entry<String, List<Integer>> entries: partitionsByTopic.entrySet()) {
Struct topicData = struct.instance(ASSIGNED_PARTITIONS_KEY_NAME);
topicData.set(TOPIC_KEY_NAME, entries.getKey());
topicData.set(PARTITIONS_KEY_NAME, entries.getValue().toArray());
topicArray.add(topicData);
}
struct.set(ASSIGNED_PARTITIONS_KEY_NAME, topicArray.toArray());
this.errorCode = errorCode;
this.generationId = generationId;
this.consumerId = consumerId;
this.assignedPartitions = assignedPartitions;
}
public JoinGroupResponse(short errorCode) {
this(errorCode, UNKNOWN_GENERATION_ID, UNKNOWN_CONSUMER_ID, Collections.<TopicPartition>emptyList());
}
public JoinGroupResponse(Struct struct) {
super(struct);
assignedPartitions = new ArrayList<TopicPartition>();
for (Object topicDataObj : struct.getArray(ASSIGNED_PARTITIONS_KEY_NAME)) {
Struct topicData = (Struct) topicDataObj;
String topic = topicData.getString(TOPIC_KEY_NAME);
for (Object partitionObj : topicData.getArray(PARTITIONS_KEY_NAME))
assignedPartitions.add(new TopicPartition(topic, (Integer) partitionObj));
}
errorCode = struct.getShort(ERROR_CODE_KEY_NAME);
generationId = struct.getInt(GENERATION_ID_KEY_NAME);
consumerId = struct.getString(CONSUMER_ID_KEY_NAME);
}
public short errorCode() {
return errorCode;
}
public int generationId() {
return generationId;
}
public String consumerId() {
return consumerId;
}
public List<TopicPartition> assignedPartitions() {
return assignedPartitions;
}
public static JoinGroupResponse parse(ByteBuffer buffer) {
return new JoinGroupResponse(((Struct) curSchema.read(buffer)));
}
}