/*
* ========================================================================
*
* Copyright 2005 Tim O'Brien.
*
* Licensed 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 com.discursive.jccook.collections.lazy;
import java.net.URL;
import org.apache.commons.collections.Transformer;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpURL;
import org.apache.commons.httpclient.methods.GetMethod;
public class StockQuoteTransformer implements Transformer {
protected URL quoteURL;
protected long timeout;
public Object transform(Object symbol) {
QuoteRetriever retriever = new QuoteRetriever( (String) symbol );
try {
Thread retrieveThread = new Thread( retriever );
retrieveThread.start();
retrieveThread.join( timeout );
} catch( InterruptedException ie ) {
System.out.println( "Quote request timed out.");
}
return retriever.getResult();
}
public URL getQuoteURL() { return quoteURL; }
public void setQuoteURL(URL url) { quoteURL = url; }
public long getTimeout() { return timeout; }
public void setTimeout(long l) { timeout = l; }
public class QuoteRetriever implements Runnable {
private String symbol;
private Float result = new Float( Float.NaN );
public QuoteRetriever(String symbol) {
this.symbol = symbol;
}
public Float getResult() {
return result;
}
public void run() {
HttpClient client = new HttpClient();
try {
HttpURL url = new HttpURL( quoteURL.toString() );
url.setQuery( "symbol", symbol );
GetMethod getMethod = new GetMethod( url.toString() );
client.executeMethod( getMethod );
String response = getMethod.getResponseBodyAsString();
result = new Float( response );
} catch( Exception e ) {
System.out.println( "Error retrieving quote" );
}
}
}
}
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