| /** |
| * 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.storm.hdfs.bolt; |
| |
| import backtype.storm.task.OutputCollector; |
| import backtype.storm.task.TopologyContext; |
| import backtype.storm.tuple.Tuple; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.SequenceFile; |
| import org.apache.hadoop.io.compress.CompressionCodecFactory; |
| import org.apache.storm.hdfs.bolt.format.FileNameFormat; |
| import org.apache.storm.hdfs.bolt.format.SequenceFormat; |
| import org.apache.storm.hdfs.bolt.rotation.FileRotationPolicy; |
| import org.apache.storm.hdfs.bolt.sync.SyncPolicy; |
| import org.apache.storm.hdfs.common.rotation.RotationAction; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.Map; |
| |
| public class SequenceFileBolt extends AbstractHdfsBolt { |
| private static final Logger LOG = LoggerFactory.getLogger(SequenceFileBolt.class); |
| |
| private SequenceFormat format; |
| private SequenceFile.CompressionType compressionType = SequenceFile.CompressionType.RECORD; |
| private transient SequenceFile.Writer writer; |
| |
| private String compressionCodec = "default"; |
| private transient CompressionCodecFactory codecFactory; |
| |
| public SequenceFileBolt() { |
| } |
| |
| public SequenceFileBolt withCompressionCodec(String codec){ |
| this.compressionCodec = codec; |
| return this; |
| } |
| |
| public SequenceFileBolt withFsUrl(String fsUrl) { |
| this.fsUrl = fsUrl; |
| return this; |
| } |
| |
| public SequenceFileBolt withConfigKey(String configKey){ |
| this.configKey = configKey; |
| return this; |
| } |
| |
| public SequenceFileBolt withFileNameFormat(FileNameFormat fileNameFormat) { |
| this.fileNameFormat = fileNameFormat; |
| return this; |
| } |
| |
| public SequenceFileBolt withSequenceFormat(SequenceFormat format) { |
| this.format = format; |
| return this; |
| } |
| |
| public SequenceFileBolt withSyncPolicy(SyncPolicy syncPolicy) { |
| this.syncPolicy = syncPolicy; |
| return this; |
| } |
| |
| public SequenceFileBolt withRotationPolicy(FileRotationPolicy rotationPolicy) { |
| this.rotationPolicy = rotationPolicy; |
| return this; |
| } |
| |
| public SequenceFileBolt withCompressionType(SequenceFile.CompressionType compressionType){ |
| this.compressionType = compressionType; |
| return this; |
| } |
| |
| public SequenceFileBolt withTickTupleIntervalSeconds(int interval) { |
| this.tickTupleInterval = interval; |
| return this; |
| } |
| |
| public SequenceFileBolt addRotationAction(RotationAction action){ |
| this.rotationActions.add(action); |
| return this; |
| } |
| |
| public SequenceFileBolt withRetryCount(int fileRetryCount) { |
| this.fileRetryCount = fileRetryCount; |
| return this; |
| } |
| |
| @Override |
| public void doPrepare(Map conf, TopologyContext topologyContext, OutputCollector collector) throws IOException { |
| LOG.info("Preparing Sequence File Bolt..."); |
| if (this.format == null) throw new IllegalStateException("SequenceFormat must be specified."); |
| |
| this.fs = FileSystem.get(URI.create(this.fsUrl), hdfsConfig); |
| this.codecFactory = new CompressionCodecFactory(hdfsConfig); |
| } |
| |
| @Override |
| void syncTuples() throws IOException { |
| LOG.debug("Attempting to sync all data to filesystem"); |
| this.writer.hsync(); |
| } |
| |
| @Override |
| void writeTuple(Tuple tuple) throws IOException { |
| this.writer.append(this.format.key(tuple), this.format.value(tuple)); |
| this.offset = this.writer.getLength(); |
| } |
| |
| Path createOutputFile() throws IOException { |
| Path p = new Path(this.fsUrl + this.fileNameFormat.getPath(), this.fileNameFormat.getName(this.rotation, System.currentTimeMillis())); |
| this.writer = SequenceFile.createWriter( |
| this.hdfsConfig, |
| SequenceFile.Writer.file(p), |
| SequenceFile.Writer.keyClass(this.format.keyClass()), |
| SequenceFile.Writer.valueClass(this.format.valueClass()), |
| SequenceFile.Writer.compression(this.compressionType, this.codecFactory.getCodecByName(this.compressionCodec)) |
| ); |
| return p; |
| } |
| |
| void closeOutputFile() throws IOException { |
| this.writer.close(); |
| } |
| } |