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From tweise <...@git.apache.org>
Subject [GitHub] incubator-apex-malhar pull request: New Kafka input operator using...
Date Thu, 31 Dec 2015 05:33:30 GMT
Github user tweise commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-malhar/pull/134#discussion_r48647169
  
    --- Diff: kafka/src/main/java/org/apache/apex/malhar/kafka/KafkaConsumerWrapper.java ---
    @@ -0,0 +1,378 @@
    +/**
    + * 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.apex.malhar.kafka;
    +
    +import java.io.Closeable;
    +import java.io.IOException;
    +import java.util.HashMap;
    +import java.util.LinkedList;
    +import java.util.List;
    +import java.util.Map;
    +import java.util.Properties;
    +import java.util.Set;
    +import java.util.concurrent.ArrayBlockingQueue;
    +import java.util.concurrent.ConcurrentHashMap;
    +import java.util.concurrent.ExecutorService;
    +import java.util.concurrent.Executors;
    +
    +import javax.validation.constraints.Pattern;
    +
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import org.apache.commons.io.IOUtils;
    +import org.apache.commons.lang3.tuple.Pair;
    +import org.apache.kafka.clients.consumer.ConsumerConfig;
    +import org.apache.kafka.clients.consumer.ConsumerRecord;
    +import org.apache.kafka.clients.consumer.ConsumerRecords;
    +import org.apache.kafka.clients.consumer.KafkaConsumer;
    +import org.apache.kafka.clients.consumer.NoOffsetForPartitionException;
    +import org.apache.kafka.clients.consumer.OffsetAndMetadata;
    +import org.apache.kafka.common.Metric;
    +import org.apache.kafka.common.MetricName;
    +import org.apache.kafka.common.TopicPartition;
    +import org.apache.kafka.common.errors.WakeupException;
    +import org.apache.kafka.common.serialization.ByteArrayDeserializer;
    +
    +import com.google.common.base.Joiner;
    +import com.google.common.util.concurrent.ThreadFactoryBuilder;
    +
    +/**
    + * This is the wrapper class for new Kafka consumer API
    + *
    + * It starts number of consumers(one for each cluster) in same number of threads.
    + * Maintains the consumer offsets
    + *
    + * It also use the consumers to commit the application processed offsets along with the
application name
    + *
    + * //@param The key object, needs to be used with http://kafka.apache.org/090/javadoc/org/apache/kafka/clients/consumer/ConsumerConfig.html#KEY_DESERIALIZER_CLASS_CONFIG
    --- End diff --
    
    Remove this?


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