Getting started with Tuscany

一：创建project

二：创建Catalog service interface

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

 三：实现Catalog

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> catalog = new ArrayList<String>();
	@Init
	public void init() {
		String currencySymbol = currencyConverter.getCurrencySymbol(currencyCode);
		catalog.add("Apple - " + currencySymbol +
		currencyConverter.getConversion("USD", currencyCode, 2.99f));
		catalog.add("Orange - " + currencySymbol +
		currencyConverter.getConversion("USD", currencyCode, 3.55f));
		catalog.add("Pear - " + currencySymbol +
		currencyConverter.getConversion("USD", currencyCode, 1.55f));
	}
	public String[] get() {
		String[] catalogArray = new String[catalog.size()];
		catalog.toArray(catalogArray);
		return catalogArray;
	}
}

 

四：创建CurrencyConverter service interface

package services;
import org.osoa.sca.annotations.Remotable;
@Remotable
public interface CurrencyConverter {
	public float getConversion(String fromCurrenycCode,
	String toCurrencyCode, float amount);
	public String getCurrencySymbol(String currencyCode);
}

五：实现CurrencyConverter

package services;
public class CurrencyConverterImpl implements CurrencyConverter {
	public float getConversion(String fromCurrencyCode,
		String toCurrencyCode, float amount) {
		if (toCurrencyCode.equals("USD"))
			return amount;
		else 			if (toCurrencyCode.equals("EUR"))
				return amount*0.7256f;
		return 0;
	}
	public String getCurrencySymbol(String currencyCode) {
		if (currencyCode.equals("USD"))
			return "$";
		else
			if (currencyCode.equals("EUR"))
				return "€";
		return "?";
	}
}

 

 

六：创建ShoppingCart

package services;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.apache.tuscany.sca.binding.feed.collection.Collection;
import org.apache.tuscany.sca.binding.feed.collection.NotFoundException;
import com.sun.syndication.feed.atom.Content;
import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.feed.atom.Link;
public class ShoppingCartImpl implements Collection {
	// needs to change to instance var once conversation scope works 	private static Map<String, Entry> cart = new HashMap<String, Entry>();
	public Feed getFeed() {
		Feed feed = new Feed();
		feed.setTitle("shopping cart");
		Content subtitle = new Content();
		subtitle.setValue("Total : " + getTotal());
		feed.setSubtitle(subtitle);
		feed.getEntries().addAll(cart.values());
		return feed;
	}
	public Entry get(String id) throws NotFoundException {
		return cart.get(id);
	}
	public Entry post(Entry entry) {
		String id = "cart-" + UUID.randomUUID().toString();
		entry.setId(id);
		Link link = new Link();
		link.setRel("edit");
		link.setHref("" + id);
		entry.getOtherLinks().add(link);
		link = new Link();
		link.setRel("alternate");
		link.setHref("" + id);
		entry.getAlternateLinks().add(link);
		entry.setCreated(new Date());
		cart.put(id, entry);
		return entry;
	}
		public void put(String id, Entry entry) throws NotFoundException {
		entry.setUpdated(new Date());
		cart.put(id, entry);
	}
	public void delete(String id) throws NotFoundException {
		if (id.equals(""))
			cart.clear();
		else
			cart.remove(id);
	} 	private String getTotal() {
		float total = 0;
		String symbol = "";
		if (!cart.isEmpty()) {
			Entry entry = cart.values().iterator().next();
			String item = ((Content)entry.getContents().get(0)).getValue();
			symbol = item.substring(item.indexOf("-")+2, item.indexOf("-")+3);
		}
		for (Entry entry : cart.values()) {
			String item = ((Content)entry.getContents().get(0)).getValue();
			total += Float.valueOf(item.substring(item.indexOf("-")+3));
		}
		return symbol + String.valueOf(total);
	}
}

七：Store 页面

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

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

<script language="JavaScript">

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


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

	catalog.get(catalog_getResponse);
	shoppingCart.get("", shoppingCart_getResponse);
</script>

</head>

<body>
<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/">(feed)</a>
	</form>    
  </div>
</body>
</html>

八：编写构件Compose Services

<?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"
	name="store">
	<component name="store">
		<t:implementation.widget location="ufservices/store.html"/>
		<service name="Widget">
			<t:binding.http/>
		</service>
                <reference name="catalog" target="Catalog">
		 	<t:binding.jsonrpc/>
		 </reference>
		 <reference name="shoppingCart" target="ShoppingCart">
		 	<t:binding.atom/>
		 </reference>		
	</component>
	<component name="Catalog">
		<implementation.java class="services.CatalogImpl"/>
		<property name="currencyCode">USD</property>
		<service name="Catalog">
			<t:binding.jsonrpc/>
		</service>
		<reference name="currencyConverter" target="CurrencyConverter"/>
	</component>
	<component name="ShoppingCart">
		<implementation.java class="services.ShoppingCartImpl"/>
		<service name="Collection">
			<t:binding.atom/>
		</service>
	</component>
	<component name="CurrencyConverter">
		<implementation.java class="services.CurrencyConverterImpl"/>
	</component>
</composite>

 

九：运行测试Launch Services

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.out.println();
		System.in.read();
		scaDomain.close();
	}
}

 

十：Use Services

运行为java application

打开路径

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