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/*
*
* 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.qpid.example.publisher;
import java.io.File;
import javax.jms.JMSException;
import org.apache.qpid.example.shared.FileUtils;
import org.apache.qpid.example.shared.Statics;
import org.slf4j.LoggerFactory;
import org.slf4j.Logger;
/**
* Class that sends message files to the Publisher to distribute
* using files as input
* Must set properties for host in properties file or uses in vm broker
*/
public class FileMessageDispatcher
{
protected static final Logger _logger = LoggerFactory.getLogger(FileMessageDispatcher.class);
protected static Publisher _publisher = null;
/**
* To use this main method you need to specify a path or file to use for input
* This class then uses file contents from the dir/file specified to generate
* messages to publish
* Intended to be a very simple way to get going with publishing using the broker
* @param args - must specify one value, the path to file(s) for publisher
*/
public static void main(String[] args)
{
// Check command line args ok - must provide a path or file for us to dispatch
if (args.length == 0)
{
System.out.println("Usage: FileMessageDispatcher <filesToDispatch>" + "");
}
else
{
try
{
// publish message(s) from file(s) to configured queue
publish(args[0]);
// Move payload file(s) to archive location as no error
FileUtils.moveFileToNewDir(args[0], System.getProperties().getProperty(Statics.ARCHIVE_PATH));
}
catch (Exception e)
{
// log error and exit
_logger.error("Error trying to dispatch message: " + e);
System.exit(1);
}
finally
{
// clean up before exiting
if (getPublisher() != null)
{
getPublisher().cleanup();
}
}
}
if (_logger.isDebugEnabled())
{
_logger.debug("Finished dispatching message");
}
System.exit(0);
}
/**
* Publish the content of a file or files from a directory as messages
* @param path - from main args
* @throws JMSException
* @throws MessageFactoryException - if cannot create message from file content
*/
public static void publish(String path) throws JMSException, MessageFactoryException
{
File tempFile = new File(path);
if (tempFile.isDirectory())
{
// while more files in dir publish them
File[] files = tempFile.listFiles();
if ((files == null) || (files.length == 0))
{
_logger.info("FileMessageDispatcher - No files to publish in input directory: " + tempFile);
}
else
{
for (File file : files)
{
// Create message factory passing in payload path
FileMessageFactory factory = new FileMessageFactory(getPublisher().getSession(), file.toString());
// Send the message generated from the payload using the _publisher
getPublisher().sendMessage(factory.createEventMessage());
}
}
}
else
{
// handle a single file
// Create message factory passing in payload path
FileMessageFactory factory = new FileMessageFactory(getPublisher().getSession(), tempFile.toString());
// Send the message generated from the payload using the _publisher
getPublisher().sendMessage(factory.createEventMessage());
}
}
/**
* Cleanup before exit
*/
public static void cleanup()
{
if (getPublisher() != null)
{
getPublisher().cleanup();
}
}
/**
* @return A Publisher instance
*/
private static Publisher getPublisher()
{
if (_publisher != null)
{
return _publisher;
}
// Create a _publisher
_publisher = new Publisher();
return _publisher;
}
}
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