Ready, Set, Go - Getting started with Tuscany

This article will show you how to download a Tuscany distribution, add the distribution as a user library in Eclipse, create the Store sample as a Java project, and then run the Store and use it from a web browser.

Info
Although this guide show some images based on the Java SCA 1.3.1 2 release, you should be able to use latest Java SCA release while going to the necessary steps for this guide.

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The first thing you do is to create a file system folder on you disk into which you will download the TUSCANY distribution.

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Code Block
package services; import org.osoa.sca.annotations.Remotable; @Remotable public interface Catalog { String Item[] get(); }

Select the "services" package again. Select the New Java Class button . In the dialog enter
"CatalogImpl" as the Name of the class, add "Catalog" as the interface this class implements, and
then select Finish to complete the dialog.

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Code Block

package services;

import java.util.ArrayList;
import java.util.List;

import org.osoa.sca.annotations.Init;
import org.osoa.sca.annotations.Property;
import org.osoa.sca.annotations.Reference;

public class CatalogImpl implements Catalog {
	@Property
	public String currencyCode = "USD";
	@Reference
	public CurrencyConverter currencyConverter;

	private List<String>List<Item> catalog = new ArrayList<String>ArrayList<Item>();

	@Init
	public void init() {
		String currencySymbol = currencyConverter
				.getCurrencySymbol(currencyCode);
		catalog.add(new Item("Apple - ", + currencySymbol +
				+ currencyConverter.getConversion("USD", currencyCode, 2.99f99)));
		catalog.add(new Item("Orange - ", + currencySymbol +
				+ currencyConverter.getConversion("USD", currencyCode, 3.55f55)));
		catalog.add(new Item("Pear - ", + currencySymbol +
				+ currencyConverter.getConversion("USD", currencyCode, 1.55f55)));
	}

	public StringItem[] get() {
		StringItem[] catalogArray = new StringItem[catalog.size()];
		catalog.toArray(catalogArray);
		return catalogArray;
	}
}

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Code Block

package services;

import org.osoa.sca.annotations.Remotable;

@Remotable
public interface CurrencyConverter {
	    public floatdouble getConversion(String fromCurrenycCode,
	 String toCurrencyCode, floatdouble amount);
	
    public String getCurrencySymbol(String currencyCode);
}

Next create a Java class in the "services" package named "CurrencyConverterImpl" and copy-paste
the following Java class code snippet into it.

Code Block

package services;

public class CurrencyConverterImpl implements CurrencyConverter {
	    public floatdouble getConversion(String fromCurrencyCode,
		 String toCurrencyCode, floatdouble amount) {
		        if (toCurrencyCode.equals("USD"))
			            return amount;
		        else 			if (toCurrencyCode.equals("EUR"))
				return amount*0.7256f;
		            return ((double)Math.round(amount * 0.7256 * 100)) /100;
        return 0;
	    }

	    public String getCurrencySymbol(String currencyCode) {
		        if (currencyCode.equals("USD"))
			            return "$";
		else
			        else if (currencyCode.equals("EUR"))
				return "€";
		            return "E"; //"â‚¬";
        return "?";
	    }
}

After completing these steps the content of the "store" project will look as follows.

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Code Block

package services;

public class Item {
    	private String name;
    	private String price;
    
    
	public Item() {
    	}
    
	public Item(String name, String price) {
        		this.name = name;
		this.price        this.price = price;
    }
    = price;
	}

	public String getName() {
        		return name;
    	}
    
	public void setName(String name) {
        		this.name = name;
    	}

    	public String getPrice() {
        		return price;
    }   
    	}

	public void setPrice(String price) {
        		this.price = price;
    	}
}

Create a Java interface in the "services" package named "Cart" and copy-paste the
following code snippet into it.

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Code Block
package services; import org.osoa.sca.annotations.Remotable; @Remotable public interface Total { String getTotal(); }

Create a Java class in the "services" package named "ShoppingCartImpl" and copy-paste the
following Java class code snippet into it.

Code Block

package services;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import org.apache.tuscany.sca.data.collection.Entry;
import org.apache.tuscany.sca.data.collection.NotFoundException;
import org.osoa.sca.annotations.Init;
import org.osoa.sca.annotations.Scope;

@Scope("COMPOSITE")
public class ShoppingCartImpl implements Cart, Total {
    
    
	private Map<String, Item> cart;
    
    @Init
    protected 
	@Init
	public void init() {
        		cart = new HashMap<String, Item>();
    	}

    	public Entry<String, Item>[] getAll() {
		Entry<String,        Entry<String, Item>[] Item>[] entries = new Entry[cart.size()];
        		int i = 0;
        		for (Map.Entry<String, Item> e : cart.entrySet()) {
            			entries[i++] = new Entry<String, Item>(e.getKey(), e.getValue());
        }
        		}
		return entries;
    	}

    	public Item get(String key) throws NotFoundException {
        		Item item = cart.get(key);
        		if (item == null) {
            			throw new NotFoundException(key);
        		} else {
            			return item;
        		}
    	}

    	public String post(String key, Item item) {
        if 		if (key == null) {
            			key = "cart-" + UUID.randomUUID().toString();
        }
        		}
		cart.put(key, item);
        		return key;
    	}

    	public void put(String key, Item item) throws NotFoundException {
        		if (!cart.containsKey(key)) {
			throw            throw new NotFoundExceptionnew NotFoundException(key);
        }
        		}
		cart.put(key, item);
    	}
    
    
	public void delete(String key) throws NotFoundException {
        		if (key == null || key.equals("")) {
            			cart.clear();
		}        } else {
            else {
			Item item = cart.remove(key);
            			if (item == null)
                				throw new NotFoundException(key);
        		}
    	}

    	public Entry<String, Item>[] query(String queryString) {
        		List<Entry<String, Item>> entries = new ArrayList<Entry<String, Item>>();
        		if (queryString.startsWith("name=")) {
            			String name = queryString.substring(5);
            			for (Map.Entry<String, Item> e : cart.entrySet()) {
                				Item item = e.getValue();
                if (item				if (item.getName().equals(name)) {
                    					entries.add(new Entry<String, Item>(e.getKey(), e
							.getValue()));
                }
            }
        }
        
				}
			}
		}
		return entries.toArray(new Entry[entries.size()]);
    	}
    
    
	public String getTotal() {
        		double total = 0;
        		String currencySymbol = "";
        		if (!cart.isEmpty()) {
			Item            Item item item = cart.values().iterator().next();
            			currencySymbol = item.getPrice().substring(0, 1);
        }
        		}
		for (Item item : cart.values()) {
            			total += Double.valueOf(item.getPrice().substring(1));
        		}
		return currencySymbol       return currencySymbol + String+ String.valueOf(total);
    	}
}

Note: Since the Tuscany conversational support is not ready yet the cart is realized through a hack.
The cart field is defined as static.

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Code Block

<html>
<head>
<title>Store</TITLE>title>

<script type="text/javascript" src="store.js"></script>

<script language="JavaScript">

	//@Reference
	var catalog = new tuscany.sca.Reference("catalog");
	
	//@Reference
	var shoppingCart = new tuscany.sca.Reference("shoppingCart");

	//@Reference
	var shoppingTotal = new tuscany.sca.Reference("shoppingTotal");
	
	var catalogItems;

	function catalog_getResponse(items) {
		var catalog = "";
		for (var i=0; i<items.length; i++) {
			catalogvar item = items[i].name += '<input name= - ' + items[i].price;
			catalog += '<input name="items" type="checkbox" value="' + 
						items[i]item + '">' + items[i]item + ' <br>';
		}
		document.getElementById('catalog').innerHTML=catalog;
		catalogItems = items;
	}
	
	function shoppingCart_getResponse(feed) {
		if (feed != null) {
			var entries = feed.getElementsByTagName("entry");              
			var list = "";
			for (var i=0; i<entries.length; i++) {
				var itemcontent = entries[i].getElementsByTagName("content")[0].firstChild.nodeValue;
				listvar name += item + = content.getElementsByTagName("name")[0].firstChild.nodeValue;
				var price = content.getElementsByTagName("price")[0].firstChild.nodeValue;
				list += name + ' - ' + price + ' <br>';
			}
			document.getElementById("shoppingCart").innerHTML = list;

			document.getElementById('total').innerHTML = feed.getElementsByTagName("subtitle")[0].firstChild.nodeValue;
		}
	}if (entries.length != 0) {			
				shoppingTotal.getTotal(shoppingTotal_getTotalResponse);
			}
		}
	}
	
	function shoppingTotal_getTotalResponse(total) {
		document.getElementById('total').innerHTML = total;
	}
	
	function shoppingCart_postResponse(entry) {
		shoppingCart.get("", shoppingCart_getResponse);
	}				


	function addToCart() {
		var items  = document.catalogForm.items;
		var j = 0;
		for (var i=0; i<items.length; i++)
			if (items[i].checked) {
				var entry = '<entry xmlns="http://www.w3.org/2005/Atom"><title>cart-item<><title>item</title><content type="text/xml">'+items +
                	'<Item xmlns="http://services/">' +
                	'<name xmlns="">' + catalogItems[i].valuename + '</content></entry>'
				name>' + '<price xmlns="">' + catalogItems[i].price + '</price>' +
                 	'</Item>' + '</content></entry>';
				shoppingCart.post(entry, shoppingCart_postResponse);
				items[i].checked = false;
			}
	}
	function checkoutCart() {
		document.getElementById('store').innerHTML='<h2>' +
				'Thanks for Shopping With Us!</h2>'+
				'<h2>Your Order</h2>'+
				'<form name="orderForm" action="store.html">'+
					document.getElementById('shoppingCart').innerHTML+
					'<br>'+
					document.getElementById('total').innerHTML+
					'<br>'+

					'<br>'+
					'<input type="submit" value="Continue Shopping">'+ 
				'</form>';
		shoppingCart.del("", null);
	}
	function deleteCart() {
		shoppingCart.del("", null);
		document.getElementById('shoppingCart').innerHTML = "";
		document.getElementById('total').innerHTML = "";	
	}	

	function init() {
		catalog.get(catalog_getResponse);
		shoppingCart.get("", shoppingCart_getResponse);
	}
	
</script>

</head>

<body><body onload="init()">
<h1>Store</h1>
  <div id="store">
   	<h2>Catalog</h2>
   	<form name="catalogForm">
		<div id="catalog" ></div>
		<br>
		<input type="button" onClick="addToCart()"  value="Add to Cart">
   	</form>
 
 	<br>
  
   	<h2>Your Shopping Cart</h2>
   	<form name="shoppingCartForm">
		<div id="shoppingCart"></div>
		<br>
		<div id="total"></div>
		<br>		
		<input type="button" onClick="checkoutCart()" value="Checkout"> 
		<input type="button" onClick="deleteCart()" value="Empty">     
	   	<a href="../ShoppingCart/Cart/">(feed)</a>
	</form>    
  </div>
</body>
</html>

After completing these steps the content of the "store" project will look as follows.

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Code Block

<?xml version="1.0" encoding="UTF-8"?>
<composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
	xmlns:t="http://tuscany.apache.org/xmlns/sca/1.0"
	xmlns:s="http://store"
         
	targetNamespace="http://store" 
	name="store">
	
	<component name="store">
		<t:implementation.widget location="ufservices/store.html" />
		<service name="Widget">
			<t:binding.http uri="http://localhost:8080/store" />
		</service>
                		<reference name="catalog" target="Catalog">
		 	<t:binding.jsonrpc />
		 </reference>
		 <reference name="shoppingCart" target="ShoppingCart/Cart">
		 	<t:binding.atom />
		 </reference>
		 <reference name="shoppingTotal" target="ShoppingCart/Total">
		 	<t:binding.jsonrpc />
		 </reference>
	</component>
	
	<component name="Catalog">
		<implementation.java class="services.CatalogImpl" />
		<property name="currencyCode">USD</property>
		<service name="Catalog">
			<t:binding.jsonrpc uri="http://localhost:8080/Catalog"/>
		</service>
		<reference name="currencyConverter" target="CurrencyConverter" />
	</component>
	
	<component name="ShoppingCart">
		<implementation.java class="services.ShoppingCartImpl" />
		<service name="Cart">
			<t:binding.atom uri="http://localhost:8080/ShoppingCart/Cart" />
		</service>    	
		<service name="Total">
			<t:binding.jsonrpc uri="http://localhost:8080/Total"/>
		</service>    	
	</component>

	<component name="CurrencyConverter">
		<implementation.java class="services.CurrencyConverterImpl" />
	</component>
</composite>

After completing these steps the content of the "store" project will look as follows.

Congratulations you completed your 1st composite service applications, now its time to take it into
action.

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Launch Services

In this step you launch and use the create the code to launch the Tuscany runtime with the new store composite service application you created.

First select Select the "Launch" class in the "launch" package of your "store" project. Right click to get the
context menu, select Run As, and then Java application. The Tuscany runtime will start up adding
the store composition to its domain.

The Eclipse console will show the following messages.

Image Removed

Next Launch your Web browser and enter the following address:

http://localhost:8080/store/store.html

You get to the Store user facing service of the composite service application.

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You can select items from the Catalog and add them to your Shopping Cart.

Note: When adding items for the first time you will be asked for userid and password by the
browser. Enter "admin" for both.

Image Removed

Since the ShoppingCart service is bound using the ATOM binding, you can also look at the
shopping card content in ATOM feed form by clicking on the feed icon Image Removed. You get the browsers default rendering for ATOM feeds.

Image Removed

Use the browser back button to get back to the Store page.

Image Removed

And then you can Checkout to complete your order.

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Explore the Samples from the Tuscany Distribution

The sample folder of the Tuscany distribution provides a rich set of samples ready for you to explore.

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In Eclipse create a New Java Project, specify the project name, select Create project from
existing source, and specify the folder that contains the sample source.

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Use Next to get to the next page in the New Java Project dialog. There go to the Libraries tab, use
the Add Library... pushbutton to add the JUnit library and the user library TUSCANY.

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Finish the New Java Project dialog. You now have the sample project available in the Eclipse workbench.

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For the calculator sample that we've chosen go to its CalculatorClient class and select Run As ->
Java Application. You will see the following output in the console.

store" project and click on the New Java Package button Image Added in the toolbar to start the package creation dialog. Use the dialog to create a new package named "launch".

Select the "launch" package. Select the New Java Class button Image Added . In the dialog enter "Launch" as the Name of the class, check the checkbox for creating a main method stub, and then select Finish to complete the dialog.

The Java editor will open on the new created Java class. Replace the content of the editor by copy-paste of the following Java class code snippet.

Code Block



package launch;

import org.apache.tuscany.sca.host.embedded.SCADomain;

public class Launch {
    public static void main(String[] args) throws Exception {
        System.out.println("Starting ...");
        SCADomain scaDomain = SCADomain.newInstance("store.composite");
        System.out.println("store.composite ready for big business !!!");
        System.in.read();
        System.out.println("Stopping ...");
        scaDomain.close();
        System.out.println();
    }
}

Congratulations you completed your 1st composite service applications, now its time to take it into
action.

Use Services

In this step you launch and use the store composite service application you created.

First select the "Launch" class in the "launch" package of your "store" project. Right click to get the
context menu, select Run As, and then Java application. The Tuscany runtime will start up adding
the store composition to its domain.

The Eclipse console will show the following messages.

Image Added

Next Launch your Web browser and enter the following address:

http://localhost:8080/store/store.html

You get to the Store user facing service of the composite service application.

Image Added

You can select items from the Catalog and add them to your Shopping Cart.

Note: When adding items for the first time you will be asked for userid and password by the
browser. Enter "admin" for both.

Image Added

Since the ShoppingCart service is bound using the ATOM binding, you can also look at the
shopping card content in ATOM feed form by clicking on the feed icon Image Added. You get the browsers default rendering for ATOM feeds.

Image Added

Use the browser back button to get back to the Store page.

Image Added

And then you can Checkout to complete your order.

Image Added

Congratulations, you have created an accessible, flexible, reusable Store application using Tuscany SCA technology. Image Removed

Child pages

Versions Compared

Old Version 18

New Version Current

Key

Ready, Set, Go - Getting started with Tuscany

Launch Services

Explore the Samples from the Tuscany Distribution

Use Services

Child pages

Page History

Versions Compared

Old Version 18

New Version Current

Key

Ready, Set, Go - Getting started with Tuscany

Launch Services

Explore the Samples from the Tuscany Distribution

Use Services