Github user akumarb2010 commented on a diff in the pull request: https://github.com/apache/drill/pull/1027#discussion_r150379252 --- Diff: contrib/storage-kafka/src/main/java/org/apache/drill/exec/store/kafka/KafkaGroupScan.java --- @@ -0,0 +1,301 @@ +/** + * 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.drill.exec.store.kafka; + +import java.util.Arrays; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import org.apache.commons.lang3.StringUtils; +import org.apache.drill.common.exceptions.ExecutionSetupException; +import org.apache.drill.common.expression.SchemaPath; +import org.apache.drill.exec.physical.EndpointAffinity; +import org.apache.drill.exec.physical.base.AbstractGroupScan; +import org.apache.drill.exec.physical.base.GroupScan; +import org.apache.drill.exec.physical.base.PhysicalOperator; +import org.apache.drill.exec.physical.base.ScanStats; +import org.apache.drill.exec.physical.base.ScanStats.GroupScanProperty; +import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint; +import org.apache.drill.exec.store.StoragePluginRegistry; +import org.apache.drill.exec.store.kafka.KafkaSubScan.KafkaSubScanSpec; +import org.apache.drill.exec.store.kafka.decoders.MessageReader; +import org.apache.drill.exec.store.kafka.decoders.MessageReaderFactory; +import org.apache.drill.exec.store.schedule.AffinityCreator; +import org.apache.drill.exec.store.schedule.AssignmentCreator; +import org.apache.drill.exec.store.schedule.CompleteWork; +import org.apache.drill.exec.store.schedule.EndpointByteMap; +import org.apache.drill.exec.store.schedule.EndpointByteMapImpl; +import org.apache.kafka.clients.consumer.KafkaConsumer; +import org.apache.kafka.common.Node; +import org.apache.kafka.common.PartitionInfo; +import org.apache.kafka.common.TopicPartition; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.fasterxml.jackson.annotation.JacksonInject; +import com.fasterxml.jackson.annotation.JsonCreator; +import com.fasterxml.jackson.annotation.JsonIgnore; +import com.fasterxml.jackson.annotation.JsonProperty; +import com.fasterxml.jackson.annotation.JsonTypeName; +import com.google.common.base.Preconditions; +import com.google.common.collect.ListMultimap; +import com.google.common.collect.Lists; +import com.google.common.collect.Maps; + +@JsonTypeName("kafka-scan") +public class KafkaGroupScan extends AbstractGroupScan { + + static final Logger logger = LoggerFactory.getLogger(KafkaGroupScan.class); + private static final long MSG_SIZE = 1024; --- End diff -- Added comment
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