/*
* $Id: TickFeed.java 22164 2011-06-09 18:46:19Z tcarlson $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.example.cep;
import org.mule.api.MuleEventContext;
import org.mule.api.lifecycle.Callable;
import org.mule.api.lifecycle.Initialisable;
import org.mule.api.lifecycle.InitialisationException;
import org.mule.util.IOUtils;
import java.io.IOException;
import java.io.InputStream;
import java.text.MessageFormat;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class TickFeed implements Initialisable, Callable
{
public static final String DATA_FILE = "stocktickstream.dat";
private static final MessageFormat lineFormat = new MessageFormat("{0,number,0};{1};{2,number,currency}", Locale.US);
private Iterator<String> lines;
protected transient Log logger = LogFactory.getLog(getClass());
public void initialise() throws InitialisationException
{
try
{
lines = readStockTickDataFile();
}
catch (IOException e)
{
throw new InitialisationException(e, this);
}
}
private Iterator<String> readStockTickDataFile() throws IOException
{
InputStream is = IOUtils.getResourceAsStream(DATA_FILE, TickFeed.class, false, false);
try
{
List<String> linesList = IOUtils.readLines(is);
logger.debug("Read data file, " + linesList.size() + " lines");
return linesList.iterator();
}
finally
{
is.close();
}
}
public Object onCall(MuleEventContext eventContext) throws Exception
{
// If we've gone through the entire datafile, start over again from the beginning.
if (!lines.hasNext())
{
lines = readStockTickDataFile();
}
Object[] results = lineFormat.parse(lines.next());
StockTick tick = new StockTick((String)results[1],
((Number)results[2]).doubleValue(),
((Number)results[0]).longValue());
logger.info("New Stock Tick: " + tick);
return tick;
}
}