alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

ActiveMQ example source code file (ActiveMQBlobMessage.java)

This example ActiveMQ source code file (ActiveMQBlobMessage.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

activemqblobmessage, binary_mime_type, blobdownloader, blobuploader, data_structure_type, io, ioexception, ioexception, jmsexception, jmsexception, malformedurlexception, net, network, string, string, url, url

The ActiveMQ ActiveMQBlobMessage.java source code

/**
 * 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.activemq.command;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

import javax.jms.JMSException;

import org.apache.activemq.BlobMessage;
import org.apache.activemq.blob.BlobDownloader;
import org.apache.activemq.blob.BlobUploader;
import org.apache.activemq.util.JMSExceptionSupport;

/**
 * An implementation of {@link BlobMessage} for out of band BLOB transfer
 * 
 * 
 * @openwire:marshaller code="29"
 */
public class ActiveMQBlobMessage extends ActiveMQMessage implements BlobMessage {
    public static final byte DATA_STRUCTURE_TYPE = CommandTypes.ACTIVEMQ_BLOB_MESSAGE;

    public static final String BINARY_MIME_TYPE = "application/octet-stream";

    private String remoteBlobUrl;
    private String mimeType;
    private String name;
    private boolean deletedByBroker;

    private transient BlobUploader blobUploader;
    private transient BlobDownloader blobDownloader;
    private transient URL url;

    public Message copy() {
        ActiveMQBlobMessage copy = new ActiveMQBlobMessage();
        copy(copy);
        return copy;
    }

    private void copy(ActiveMQBlobMessage copy) {
        super.copy(copy);
        copy.setRemoteBlobUrl(getRemoteBlobUrl());
        copy.setMimeType(getMimeType());
        copy.setDeletedByBroker(isDeletedByBroker());
        copy.setBlobUploader(getBlobUploader());
        copy.setName(getName());
    }

    public byte getDataStructureType() {
        return DATA_STRUCTURE_TYPE;
    }

    /**
     * @openwire:property version=3 cache=false
     */
    public String getRemoteBlobUrl() {
        return remoteBlobUrl;
    }

    public void setRemoteBlobUrl(String remoteBlobUrl) {
        this.remoteBlobUrl = remoteBlobUrl;
        url = null;
    }

    /**
     * The MIME type of the BLOB which can be used to apply different content
     * types to messages.
     * 
     * @openwire:property version=3 cache=true
     */
    public String getMimeType() {
        if (mimeType == null) {
            return BINARY_MIME_TYPE;
        }
        return mimeType;
    }

    public void setMimeType(String mimeType) {
        this.mimeType = mimeType;
    }

    public String getName() {
        return name;
    }

    /**
     * The name of the attachment which can be useful information if
     * transmitting files over ActiveMQ
     * 
     * @openwire:property version=3 cache=false
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @openwire:property version=3 cache=false
     */
    public boolean isDeletedByBroker() {
        return deletedByBroker;
    }

    public void setDeletedByBroker(boolean deletedByBroker) {
        this.deletedByBroker = deletedByBroker;
    }

    public String getJMSXMimeType() {
        return getMimeType();
    }

    public InputStream getInputStream() throws IOException, JMSException {
        if(blobDownloader == null) {
            return null;
        }
        return blobDownloader.getInputStream(this);
    }

    public URL getURL() throws JMSException {
        if (url == null && remoteBlobUrl != null) {
            try {
                url = new URL(remoteBlobUrl);
            } catch (MalformedURLException e) {
                throw JMSExceptionSupport.create(e);
            }
        }
        return url;
    }

    public void setURL(URL url) {
        this.url = url;
        remoteBlobUrl = url != null ? url.toExternalForm() : null;
    }

    public BlobUploader getBlobUploader() {
        return blobUploader;
    }

    public void setBlobUploader(BlobUploader blobUploader) {
        this.blobUploader = blobUploader;
    }

    public BlobDownloader getBlobDownloader() {
        return blobDownloader;
    }

    public void setBlobDownloader(BlobDownloader blobDownloader) {
        this.blobDownloader = blobDownloader;
    }

    public void onSend() throws JMSException {
        super.onSend();

        // lets ensure we upload the BLOB first out of band before we send the
        // message
        if (blobUploader != null) {
            try {
                URL value = blobUploader.upload(this);
                setURL(value);
            } catch (IOException e) {
                throw JMSExceptionSupport.create(e);
            }
        }
    }
    
    public void deleteFile() throws IOException, JMSException {
        blobDownloader.deleteFile(this);
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ ActiveMQBlobMessage.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.