| /** |
| * 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 kafka.consumer |
| |
| |
| import java.util.concurrent.BlockingQueue |
| import kafka.serializer.Decoder |
| import kafka.message.MessageAndMetadata |
| |
| class KafkaStream[K,V](private val queue: BlockingQueue[FetchedDataChunk], |
| consumerTimeoutMs: Int, |
| private val keyDecoder: Decoder[K], |
| private val valueDecoder: Decoder[V], |
| val clientId: String) |
| extends Iterable[MessageAndMetadata[K,V]] with java.lang.Iterable[MessageAndMetadata[K,V]] { |
| |
| private val iter: ConsumerIterator[K,V] = |
| new ConsumerIterator[K,V](queue, consumerTimeoutMs, keyDecoder, valueDecoder, clientId) |
| |
| /** |
| * Create an iterator over messages in the stream. |
| */ |
| def iterator(): ConsumerIterator[K,V] = iter |
| |
| /** |
| * This method clears the queue being iterated during the consumer rebalancing. This is mainly |
| * to reduce the number of duplicates received by the consumer |
| */ |
| def clear() { |
| iter.clearCurrentChunk() |
| } |
| |
| override def toString: String = { |
| "%s kafka stream".format(clientId) |
| } |
| } |