| /** |
| * 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.camel.component.hdfs; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.concurrent.atomic.AtomicLong; |
| import javax.xml.ws.Holder; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IOUtils; |
| |
| public class HdfsInputStream { |
| |
| private HdfsFileType fileType; |
| private String actualPath; |
| private String suffixedPath; |
| private Closeable in; |
| private boolean opened; |
| private int chunkSize; |
| private final AtomicLong numOfReadBytes = new AtomicLong(0L); |
| private final AtomicLong numOfReadMessages = new AtomicLong(0L); |
| |
| protected HdfsInputStream() { |
| } |
| |
| public static HdfsInputStream createInputStream(String hdfsPath, HdfsConfiguration configuration) throws IOException { |
| HdfsInputStream ret = new HdfsInputStream(); |
| ret.fileType = configuration.getFileType(); |
| ret.actualPath = hdfsPath; |
| ret.suffixedPath = ret.actualPath + '.' + configuration.getOpenedSuffix(); |
| ret.chunkSize = configuration.getChunkSize(); |
| HdfsInfo info = new HdfsInfo(ret.actualPath); |
| info.getFileSystem().rename(new Path(ret.actualPath), new Path(ret.suffixedPath)); |
| ret.in = ret.fileType.createInputStream(ret.suffixedPath, configuration); |
| ret.opened = true; |
| return ret; |
| } |
| |
| public final void close() throws IOException { |
| if (opened) { |
| IOUtils.closeStream(in); |
| HdfsInfo info = new HdfsInfo(actualPath); |
| info.getFileSystem().rename(new Path(suffixedPath), new Path(actualPath + '.' + HdfsConstants.DEFAULT_READ_SUFFIX)); |
| opened = false; |
| } |
| } |
| |
| public final long next(Holder<Object> key, Holder<Object> value) { |
| long nb = fileType.next(this, key, value); |
| if (nb > 0) { |
| numOfReadBytes.addAndGet(nb); |
| numOfReadMessages.incrementAndGet(); |
| } |
| return nb; |
| } |
| |
| public final long getNumOfReadBytes() { |
| return numOfReadBytes.longValue(); |
| } |
| |
| public final long getNumOfReadMessages() { |
| return numOfReadMessages.longValue(); |
| } |
| |
| public final String getActualPath() { |
| return actualPath; |
| } |
| |
| public final int getChunkSize() { |
| return chunkSize; |
| } |
| |
| public final Closeable getIn() { |
| return in; |
| } |
| |
| } |