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     */
017    package org.apache.activemq.blob;
018    
019    import java.io.File;
020    import java.io.FileInputStream;
021    import java.io.IOException;
022    import java.io.InputStream;
023    import java.io.OutputStream;
024    import java.net.HttpURLConnection;
025    import java.net.MalformedURLException;
026    import java.net.URL;
027    
028    import javax.jms.JMSException;
029    
030    import org.apache.activemq.command.ActiveMQBlobMessage;
031    
032    /**
033     * A default implementation of {@link BlobUploadStrategy} which uses the URL
034     * class to upload files or streams to a remote URL
035     */
036    public class DefaultBlobUploadStrategy extends DefaultStrategy implements BlobUploadStrategy {
037    
038        public DefaultBlobUploadStrategy(BlobTransferPolicy transferPolicy) {
039            super(transferPolicy);
040        }
041    
042        public URL uploadFile(ActiveMQBlobMessage message, File file) throws JMSException, IOException {
043            return uploadStream(message, new FileInputStream(file));
044        }
045    
046        public URL uploadStream(ActiveMQBlobMessage message, InputStream fis) throws JMSException, IOException {
047            URL url = createMessageURL(message);
048    
049            HttpURLConnection connection = (HttpURLConnection)url.openConnection();
050            connection.setRequestMethod("PUT");
051            connection.setDoOutput(true);
052    
053            // use chunked mode or otherwise URLConnection loads everything into
054            // memory
055            // (chunked mode not supported before JRE 1.5)
056            connection.setChunkedStreamingMode(transferPolicy.getBufferSize());
057    
058            OutputStream os = connection.getOutputStream();
059    
060            byte[] buf = new byte[transferPolicy.getBufferSize()];
061            for (int c = fis.read(buf); c != -1; c = fis.read(buf)) {
062                os.write(buf, 0, c);
063                os.flush();
064            }
065            os.close();
066            fis.close();
067    
068            if (!isSuccessfulCode(connection.getResponseCode())) {
069                throw new IOException("PUT was not successful: " + connection.getResponseCode() + " "
070                                      + connection.getResponseMessage());
071            }
072    
073            return url;
074        }
075    
076    
077    }