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.IOException; 020import java.io.InputStream; 021import java.net.HttpURLConnection; 022import java.net.URL; 023import javax.jms.JMSException; 024import org.apache.activemq.command.ActiveMQBlobMessage; 025 026/** 027 * A default implementation of {@link BlobDownloadStrategy} which uses the URL 028 * class to download files or streams from a remote URL 029 */ 030public class DefaultBlobDownloadStrategy extends DefaultStrategy implements BlobDownloadStrategy { 031 032 public DefaultBlobDownloadStrategy(BlobTransferPolicy transferPolicy) { 033 super(transferPolicy); 034 } 035 036 public InputStream getInputStream(ActiveMQBlobMessage message) throws IOException, JMSException { 037 URL value = message.getURL(); 038 if (value == null) { 039 return null; 040 } 041 return value.openStream(); 042 } 043 044 public void deleteFile(ActiveMQBlobMessage message) throws IOException, JMSException { 045 URL url = createMessageURL(message); 046 047 HttpURLConnection connection = (HttpURLConnection)url.openConnection(); 048 connection.setRequestMethod("DELETE"); 049 connection.connect(); 050 connection.disconnect(); 051 052 if (!isSuccessfulCode(connection.getResponseCode())) { 053 throw new IOException("DELETE was not successful: " + connection.getResponseCode() + " " 054 + connection.getResponseMessage()); 055 } 056 } 057 058}