/**
* 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.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class ListOffsetResponse extends AbstractRequestResponse {
public static Schema curSchema = ProtoUtils.currentResponseSchema(ApiKeys.LIST_OFFSETS.id);
private static String RESPONSES_KEY_NAME = "responses";
// topic level field names
private static String TOPIC_KEY_NAME = "topic";
private static String PARTITIONS_KEY_NAME = "partition_responses";
// partition level field names
private static String PARTITION_KEY_NAME = "partition";
private static String ERROR_CODE_KEY_NAME = "error_code";
private static String OFFSETS_KEY_NAME = "offsets";
private final Map<TopicPartition, PartitionData> responseData;
public static final class PartitionData {
public final short errorCode;
public final List<Long> offsets;
public PartitionData(short errorCode, List<Long> offsets) {
this.errorCode = errorCode;
this.offsets = offsets;
}
}
public ListOffsetResponse(Map<TopicPartition, PartitionData> responseData) {
super(new Struct(curSchema));
Map<String, Map<Integer, PartitionData>> topicsData = CollectionUtils.groupDataByTopic(responseData);
List<Struct> topicArray = new ArrayList<Struct>();
for (Map.Entry<String, Map<Integer, PartitionData>> topicEntry: topicsData.entrySet()) {
Struct topicData = struct.instance(RESPONSES_KEY_NAME);
topicData.set(TOPIC_KEY_NAME, topicEntry.getKey());
List<Struct> partitionArray = new ArrayList<Struct>();
for (Map.Entry<Integer, PartitionData> partitionEntry : topicEntry.getValue().entrySet()) {
PartitionData offsetPartitionData = partitionEntry.getValue();
Struct partitionData = topicData.instance(PARTITIONS_KEY_NAME);
partitionData.set(PARTITION_KEY_NAME, partitionEntry.getKey());
partitionData.set(ERROR_CODE_KEY_NAME, offsetPartitionData.errorCode);
partitionData.set(OFFSETS_KEY_NAME, offsetPartitionData.offsets.toArray());
partitionArray.add(partitionData);
}
topicData.set(PARTITIONS_KEY_NAME, partitionArray.toArray());
topicArray.add(topicData);
}
struct.set(RESPONSES_KEY_NAME, topicArray.toArray());
this.responseData = responseData;
}
public ListOffsetResponse(Struct struct) {
super(struct);
responseData = new HashMap<TopicPartition, PartitionData>();
for (Object topicResponseObj : struct.getArray(RESPONSES_KEY_NAME)) {
Struct topicResponse = (Struct) topicResponseObj;
String topic = topicResponse.getString(TOPIC_KEY_NAME);
for (Object partitionResponseObj : topicResponse.getArray(PARTITIONS_KEY_NAME)) {
Struct partitionResponse = (Struct) partitionResponseObj;
int partition = partitionResponse.getInt(PARTITION_KEY_NAME);
short errorCode = partitionResponse.getShort(ERROR_CODE_KEY_NAME);
Object[] offsets = partitionResponse.getArray(OFFSETS_KEY_NAME);
List<Long> offsetsList = new ArrayList<Long>();
for (Object offset: offsets)
offsetsList.add((Long) offset);
PartitionData partitionData = new PartitionData(errorCode, offsetsList);
responseData.put(new TopicPartition(topic, partition), partitionData);
}
}
}
public Map<TopicPartition, PartitionData> responseData() {
return responseData;
}
public static ListOffsetResponse parse(ByteBuffer buffer) {
return new ListOffsetResponse(((Struct) curSchema.read(buffer)));
}
}