| /** |
| * 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.hadoop.fs.ftp; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.commons.net.ftp.FTPClient; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.FSInputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public class FTPInputStream extends FSInputStream { |
| |
| InputStream wrappedStream; |
| FTPClient client; |
| FileSystem.Statistics stats; |
| boolean closed; |
| long pos; |
| |
| public FTPInputStream(InputStream stream, FTPClient client, |
| FileSystem.Statistics stats) { |
| if (stream == null) { |
| throw new IllegalArgumentException("Null InputStream"); |
| } |
| if (client == null || !client.isConnected()) { |
| throw new IllegalArgumentException("FTP client null or not connected"); |
| } |
| this.wrappedStream = stream; |
| this.client = client; |
| this.stats = stats; |
| this.pos = 0; |
| this.closed = false; |
| } |
| |
| @Override |
| public long getPos() throws IOException { |
| return pos; |
| } |
| |
| // We don't support seek. |
| @Override |
| public void seek(long pos) throws IOException { |
| throw new IOException("Seek not supported"); |
| } |
| |
| @Override |
| public boolean seekToNewSource(long targetPos) throws IOException { |
| throw new IOException("Seek not supported"); |
| } |
| |
| @Override |
| public synchronized int read() throws IOException { |
| if (closed) { |
| throw new IOException("Stream closed"); |
| } |
| |
| int byteRead = wrappedStream.read(); |
| if (byteRead >= 0) { |
| pos++; |
| } |
| if (stats != null && byteRead >= 0) { |
| stats.incrementBytesRead(1); |
| } |
| return byteRead; |
| } |
| |
| @Override |
| public synchronized int read(byte buf[], int off, int len) throws IOException { |
| if (closed) { |
| throw new IOException("Stream closed"); |
| } |
| |
| int result = wrappedStream.read(buf, off, len); |
| if (result > 0) { |
| pos += result; |
| } |
| if (stats != null && result > 0) { |
| stats.incrementBytesRead(result); |
| } |
| |
| return result; |
| } |
| |
| @Override |
| public synchronized void close() throws IOException { |
| if (closed) { |
| return; |
| } |
| super.close(); |
| closed = true; |
| if (!client.isConnected()) { |
| throw new FTPException("Client not connected"); |
| } |
| |
| boolean cmdCompleted = client.completePendingCommand(); |
| client.logout(); |
| client.disconnect(); |
| if (!cmdCompleted) { |
| throw new FTPException("Could not complete transfer, Reply Code - " |
| + client.getReplyCode()); |
| } |
| } |
| |
| // Not supported. |
| |
| @Override |
| public boolean markSupported() { |
| return false; |
| } |
| |
| @Override |
| public void mark(int readLimit) { |
| // Do nothing |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| throw new IOException("Mark not supported"); |
| } |
| } |