/**
* 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 OffsetFetchResponse extends AbstractRequestResponse {
public static Schema curSchema = ProtoUtils.currentResponseSchema(ApiKeys.OFFSET_FETCH.id);
private static String RESPONSES_KEY_NAME = "responses";
// topic level fields
private static String TOPIC_KEY_NAME = "topic";
private static String PARTITIONS_KEY_NAME = "partition_responses";
// partition level fields
private static String PARTITION_KEY_NAME = "partition";
private static String COMMIT_OFFSET_KEY_NAME = "offset";
private static String METADATA_KEY_NAME = "metadata";
private static String ERROR_CODE_KEY_NAME = "error_code";
private final Map<TopicPartition,PartitionData> responseData;
public static final class PartitionData {
public final long offset;
public final String metadata;
public final short errorCode;
public PartitionData(long offset, String metadata, short errorCode) {
this.offset = offset;
this.metadata = metadata;
this.errorCode = errorCode;
}
}
public OffsetFetchResponse(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>> entries: topicsData.entrySet()) {
Struct topicData = struct.instance(RESPONSES_KEY_NAME);
topicData.set(TOPIC_KEY_NAME, entries.getKey());
List<Struct> partitionArray = new ArrayList<Struct>();
for (Map.Entry<Integer, PartitionData> partitionEntry : entries.getValue().entrySet()) {
PartitionData fetchPartitionData = partitionEntry.getValue();
Struct partitionData = topicData.instance(PARTITIONS_KEY_NAME);
partitionData.set(PARTITION_KEY_NAME, partitionEntry.getKey());
partitionData.set(COMMIT_OFFSET_KEY_NAME, fetchPartitionData.offset);
partitionData.set(METADATA_KEY_NAME, fetchPartitionData.metadata);
partitionData.set(ERROR_CODE_KEY_NAME, fetchPartitionData.errorCode);
partitionArray.add(partitionData);
}
topicData.set(PARTITIONS_KEY_NAME, partitionArray.toArray());
topicArray.add(topicData);
}
struct.set(RESPONSES_KEY_NAME, topicArray.toArray());
this.responseData = responseData;
}
public OffsetFetchResponse(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);
long offset = partitionResponse.getLong(COMMIT_OFFSET_KEY_NAME);
String metadata = partitionResponse.getString(METADATA_KEY_NAME);
short errorCode = partitionResponse.getShort(ERROR_CODE_KEY_NAME);
PartitionData partitionData = new PartitionData(offset, metadata, errorCode);
responseData.put(new TopicPartition(topic, partition), partitionData);
}
}
}
public Map<TopicPartition, PartitionData> responseData() {
return responseData;
}
public static OffsetFetchResponse parse(ByteBuffer buffer) {
return new OffsetFetchResponse(((Struct) curSchema.read(buffer)));
}
}