/** * 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.javaapi.consumer import kafka.utils.threadsafe import kafka.javaapi.FetchResponse import kafka.javaapi.OffsetRequest /** * A consumer of kafka messages */ @threadsafe class SimpleConsumer(val host: String, val port: Int, val soTimeout: Int, val bufferSize: Int, val clientId: String) { private val underlying = new kafka.consumer.SimpleConsumer(host, port, soTimeout, bufferSize, clientId) /** * Fetch a set of messages from a topic. This version of the fetch method * takes the Scala version of a fetch request (i.e., * [[kafka.api.FetchRequest]] and is intended for use with the * [[kafka.api.FetchRequestBuilder]]. * * @param request specifies the topic name, topic partition, starting byte offset, maximum bytes to be fetched. * @return a set of fetched messages */ def fetch(request: kafka.api.FetchRequest): FetchResponse = { import kafka.javaapi.Implicits._ underlying.fetch(request) } /** * Fetch a set of messages from a topic. * * @param request specifies the topic name, topic partition, starting byte offset, maximum bytes to be fetched. * @return a set of fetched messages */ def fetch(request: kafka.javaapi.FetchRequest): FetchResponse = { fetch(request.underlying) } /** * Fetch metadata for a sequence of topics. * * @param request specifies the versionId, clientId, sequence of topics. * @return metadata for each topic in the request. */ def send(request: kafka.javaapi.TopicMetadataRequest): kafka.javaapi.TopicMetadataResponse = { import kafka.javaapi.Implicits._ underlying.send(request.underlying) } /** * Get a list of valid offsets (up to maxSize) before the given time. * * @param request a [[kafka.javaapi.OffsetRequest]] object. * @return a [[kafka.javaapi.OffsetResponse]] object. */ def getOffsetsBefore(request: OffsetRequest): kafka.javaapi.OffsetResponse = { import kafka.javaapi.Implicits._ underlying.getOffsetsBefore(request.underlying) } /** * Commit offsets for a topic to Zookeeper * @param request a [[kafka.javaapi.OffsetCommitRequest]] object. * @return a [[kafka.javaapi.OffsetCommitResponse]] object. */ def commitOffsets(request: kafka.javaapi.OffsetCommitRequest): kafka.javaapi.OffsetCommitResponse = { import kafka.javaapi.Implicits._ underlying.commitOffsets(request.underlying) } /** * Fetch offsets for a topic from Zookeeper * @param request a [[kafka.javaapi.OffsetFetchRequest]] object. * @return a [[kafka.javaapi.OffsetFetchResponse]] object. */ def fetchOffsets(request: kafka.javaapi.OffsetFetchRequest): kafka.javaapi.OffsetFetchResponse = { import kafka.javaapi.Implicits._ underlying.fetchOffsets(request.underlying) } def close() { underlying.close } }