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 javax.jms.JMSException; 022import org.apache.activemq.command.ActiveMQBlobMessage; 023 024 025/** 026 * Mediator for Blob Download 027 */ 028public class BlobDownloader { 029 030 private final BlobTransferPolicy blobTransferPolicy; 031 032 public BlobDownloader(BlobTransferPolicy transferPolicy) { 033 // need to do a defensive copy 034 this.blobTransferPolicy = transferPolicy.copy(); 035 } 036 037 public InputStream getInputStream(ActiveMQBlobMessage message) throws IOException, JMSException { 038 return getStrategy().getInputStream(message); 039 } 040 041 public void deleteFile(ActiveMQBlobMessage message) throws IOException, JMSException { 042 getStrategy().deleteFile(message); 043 } 044 045 public BlobTransferPolicy getBlobTransferPolicy() { 046 return blobTransferPolicy; 047 } 048 049 public BlobDownloadStrategy getStrategy() { 050 return getBlobTransferPolicy().getDownloadStrategy(); 051 } 052}