001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.blob; 018 019import java.io.FilterInputStream; 020import java.io.IOException; 021import java.io.InputStream; 022import java.net.MalformedURLException; 023 024import javax.jms.JMSException; 025 026import org.apache.activemq.command.ActiveMQBlobMessage; 027import org.apache.commons.net.ftp.FTPClient; 028 029/** 030 * A FTP implementation for {@link BlobDownloadStrategy}. 031 */ 032public class FTPBlobDownloadStrategy extends FTPStrategy implements BlobDownloadStrategy { 033 034 public FTPBlobDownloadStrategy(BlobTransferPolicy transferPolicy) throws MalformedURLException { 035 super(transferPolicy); 036 } 037 038 public InputStream getInputStream(ActiveMQBlobMessage message) throws IOException, JMSException { 039 url = message.getURL(); 040 final FTPClient ftp = createFTP(); 041 String path = url.getPath(); 042 String workingDir = path.substring(0, path.lastIndexOf("/")); 043 String file = path.substring(path.lastIndexOf("/") + 1); 044 ftp.changeWorkingDirectory(workingDir); 045 ftp.setFileType(FTPClient.BINARY_FILE_TYPE); 046 047 InputStream input = new FilterInputStream(ftp.retrieveFileStream(file)) { 048 049 public void close() throws IOException { 050 in.close(); 051 ftp.quit(); 052 ftp.disconnect(); 053 } 054 }; 055 056 return input; 057 } 058 059 public void deleteFile(ActiveMQBlobMessage message) throws IOException, JMSException { 060 url = message.getURL(); 061 final FTPClient ftp = createFTP(); 062 063 String path = url.getPath(); 064 try { 065 if (!ftp.deleteFile(path)) { 066 throw new JMSException("Delete file failed: " + ftp.getReplyString()); 067 } 068 } finally { 069 ftp.quit(); 070 ftp.disconnect(); 071 } 072 073 } 074 075}