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The Loan Broker example application is based on the example presented in the Enterprise Integration Patterns book. This chapter of the book is available online so you can see a detailed description of the application here (http://www.eaipatterns.com/ComposedMessagingWS.html).
/*
* $Id: LoanConsumer.java 3982 2006-11-22 14:28:01Z lajos $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com
*
* The software in this package is published under the terms of the MuleSource MPL
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.samples.loanbroker;
import org.mule.MuleManager;
import org.mule.config.builders.MuleXmlConfigurationBuilder;
import org.mule.extras.client.MuleClient;
import org.mule.umo.UMOException;
import org.mule.umo.UMOMessage;
import org.mule.util.DateUtils;
import org.mule.util.StringUtils;
import org.mule.util.StringMessageUtils;
import org.mule.util.SystemUtils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* LoanConsumer is a loan broker client app that uses command line
* prompts to obtain loan requests
*/
public class LoanConsumer
{
private static boolean synchronous = false;
private List customers = new ArrayList();
private MuleClient client = null;
public LoanConsumer() throws UMOException
{
init();
}
public LoanConsumer(String config) throws UMOException
{
MuleXmlConfigurationBuilder builder = new MuleXmlConfigurationBuilder();
builder.configure(config);
init();
}
private void init() throws UMOException
{
client = new MuleClient();
customers.add(new Customer("Jenson Button", 123));
customers.add(new Customer("Michael Schumacker", 456));
customers.add(new Customer("Juan Pablo Montoya", 789));
customers.add(new Customer("David Colthard", 101));
customers.add(new Customer("Rubens Barrichello", 112));
customers.add(new Customer("Mark Webber", 131));
customers.add(new Customer("Takuma Sato", 415));
customers.add(new Customer("Kimi Raikkonen", 161));
customers.add(new Customer("Ralf Schumacher", 718));
customers.add(new Customer("Jarno Trulli", 192));
}
public void close()
{
MuleManager.getInstance().dispose();
}
public LoanRequest createRequest()
{
int index = new Double(Math.random() * 10).intValue();
Customer c = (Customer)customers.get(index);
return new LoanRequest(c, getRandomAmount(), getRandomDuration());
}
private static double getRandomAmount()
{
return Math.round(Math.random() * 18000);
}
private static int getRandomDuration()
{
return new Double(Math.random() * 60).intValue();
}
public void request(LoanRequest request, boolean sync) throws Exception
{
if (!sync)
{
client.dispatch("vm://LoanBrokerRequests", request, null);
System.out.println("Sent Async request");
// let the request catch up
Thread.sleep(1500);
}
else
{
UMOMessage result = client.send("vm://LoanBrokerRequests", request, null);
if (result == null)
{
System.out.println("A result was not received, an error must have occurred. Check the logs.");
}
else
{
System.out.println("Loan Consumer received a Quote: " + result.getPayload());
}
}
}
public void requestDispatch(int number, String endpoint) throws Exception
{
for (int i = 0; i < number; i++)
{
client.dispatch(endpoint, createRequest(), null);
}
}
public List requestSend(int number, String endpoint) throws Exception
{
List results = new ArrayList(number);
UMOMessage result;
for (int i = 0; i < number; i++)
{
result = client.send(endpoint, createRequest(), null);
if (result != null)
{
results.add(result.getPayload());
}
}
return results;
}
public static void main(String[] args)
{
LoanConsumer loanConsumer = null;
try
{
String config = SystemUtils.getCommandLineOption("-config", args);
if (StringUtils.isNotBlank(config))
{
loanConsumer = new LoanConsumer(config);
int i = 100;
String requests = SystemUtils.getCommandLineOption("-req", args);
if (requests != null)
{
i = Integer.parseInt(requests);
}
String sync = SystemUtils.getCommandLineOption("-sync", args);
if (sync != null)
{
synchronous = Boolean.valueOf(sync).booleanValue();
}
if (synchronous)
{
long start = System.currentTimeMillis();
List results = loanConsumer.requestSend(i, "vm://LoanBrokerRequests");
System.out.println("Number or quotes received: " + results.size());
List output = new ArrayList(results.size());
int x = 1;
for (Iterator iterator = results.iterator(); iterator.hasNext(); x++)
{
LoanQuote quote = (LoanQuote)iterator.next();
output.add(x + ". " + quote.toString());
}
System.out.println(StringMessageUtils.getBoilerPlate(output, '*', 80));
long cur = System.currentTimeMillis();
System.out.println(DateUtils.getFormattedDuration(cur - start));
System.out.println("Avg request: " + ((cur - start) / x));
}
else
{
loanConsumer.requestDispatch(i, "vm://LoanBrokerRequests");
}
}
else
{
loanConsumer = new LoanConsumer(getInteractiveConfig());
loanConsumer.run(synchronous);
}
}
catch (Exception e)
{
System.err.println(e.getMessage());
e.printStackTrace(System.err);
System.exit(1);
}
}
protected static String getInteractiveConfig() throws IOException
{
System.out.println(StringMessageUtils.getBoilerPlate("Welcome to the Mule Loan Broker example"));
int response = 0;
String provider = "axis";
while (response != 'a' && /* response != 'g' && */response != 'x')
{
// System.out.println("\nWhich SOAP stack would you like to use: [a]xis,
// [g]lue or [x]fire?");
System.out.println("\nWhich SOAP stack would you like to use: [a]xis or [x]fire?");
response = readCharacter();
switch (response)
{
case 'a' :
{
provider = "axis";
break;
}
// TODO re-enable glue when the locahost/IP issue is fixed
// case 'g':
// {
// provider = "glue";
// break;
// }
case 'x' :
{
provider = "xfire";
break;
}
}
}
response = 0;
while (response != 'a' && response != 's')
{
System.out.println("\nWould you like to run the [s]ynchronous or [a]synchronous version?");
response = readCharacter();
switch (response)
{
case 'a' :
{
System.out.println("Loading Asynchronous Loan Broker");
synchronous = false;
break;
}
case 's' :
{
System.out.println("Loading Synchronous Loan Broker");
synchronous = true;
break;
}
}
}
String config = "loan-broker-" + provider + "-" + (synchronous ? "sync" : "async") + "-config.xml";
return config;
}
protected void run(boolean synchronous) throws Exception
{
int response = 0;
while (response != 'q')
{
System.out.println("\n[1] make a loan request");
System.out.println("[2] send 100 random requests");
System.out.println("[3] send x requests");
System.out.println("[q] quit");
System.out.println("\nPlease make your selection: ");
response = readCharacter();
switch (response)
{
case '1' :
{
LoanRequest request = getRequestFromUser();
request(request, synchronous);
break;
}
case '2' :
{
sendRandomRequests(100, synchronous);
break;
}
case '3' :
{
System.out.println("Enter number of requests: ");
int number = readInt();
if (number < 1)
{
System.out.println("Number of requests must be at least 1");
}
else
{
sendRandomRequests(number, synchronous);
}
break;
}
case 'q' :
{
System.out.println("Exiting now.");
close();
System.exit(0);
}
default :
{
System.out.println("That response is not recognised, try again.");
}
}
}
}
protected void sendRandomRequests(int number, boolean synchronous) throws Exception
{
if (synchronous)
{
List list = this.requestSend(number, "vm://LoanBrokerRequests");
int i = 1;
for (Iterator iterator = list.iterator(); iterator.hasNext(); i++)
{
System.out.println("Request " + i + ": " + iterator.next().toString());
}
}
else
{
this.requestDispatch(number, "vm://LoanBrokerRequests");
}
}
protected static int readCharacter() throws IOException
{
byte[] buf = new byte[16];
System.in.read(buf);
return buf[0];
}
protected static String readString() throws IOException
{
byte[] buf = new byte[80];
System.in.read(buf);
return new String(buf).trim();
}
protected static int readInt() throws IOException
{
try
{
return Integer.parseInt(readString());
}
catch (NumberFormatException nfex)
{
return 0;
}
}
protected static LoanRequest getRequestFromUser() throws IOException
{
System.out.println("Enter your name:");
String name = readString();
System.out.println("Enter loan Amount:");
String amount = readString();
System.out.println("Enter loan Duration in months:");
String duration = readString();
int d = 0;
try
{
d = Integer.parseInt(duration);
}
catch (NumberFormatException e)
{
System.out.println("Failed to parse duration: " + duration + ". Using random default");
d = getRandomDuration();
}
double a = 0;
try
{
a = Double.valueOf(amount).doubleValue();
}
catch (NumberFormatException e)
{
System.out.println("Failed to parse amount: " + amount + ". Using random default");
a = getRandomAmount();
}
Customer c = new Customer(name, getRandomSsn());
LoanRequest request = new LoanRequest(c, a, d);
return request;
}
private static int getRandomSsn()
{
return new Double(Math.random() * 6000).intValue();
}
}