Tuscany--是一個(gè)符合SCA標(biāo)準(zhǔn)的開源實(shí)現(xiàn)，他能夠很容易地將一個(gè)服務(wù)綁定為一個(gè)Web Service：
<composite?xmlns="http://www.osoa.org/xmlns/sca/1.0"?name="Employee">
????<service?name="HelloWorldService"
????????promote="HelloWorldServiceComponent">
????????<interface.wsdl
????????????interface="http://helloworld#wsdl.interface(HelloWorld)"?/>
????????<binding.ws?uri="http://localhost:8085/HelloWorldService"?/>
????</service>
????<component?name="HelloWorldServiceComponent">
????????<implementation.java?class="helloworld.HelloWorldImpl"?/>
????</component>
</composite>
要使服務(wù)發(fā)布成功，要保證有以下幾個(gè)文件：
-
一個(gè)預(yù)定義的wsdl文件，只要保證這個(gè)文件在classpath下就可以了。
-
一個(gè)java接口。
-
一個(gè)java類。
下面列依次列出這幾個(gè)文件：
* helloworld.wsdl<wsdl:definitions?targetNamespace="http://helloworld"
xmlns:tns="http://helloworld"?xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
????name="helloworld">
????<wsdl:types>
????????<schema?elementFormDefault="qualified"?targetNamespace="http://helloworld"
???????? xmlns="http://www.w3.org/2001/XMLSchema">
????????????<element?name="getGreetings">
????????????????<complexType>
????????????????????<sequence>
????????????????????????<element?name="name"?type="xsd:string"/>
????????????????????</sequence>
????????????????</complexType>
????????????</element>
????????????<element?name="getGreetingsResponse">
????????????????<complexType>
????????????????????<sequence>
????????????????????????<element?name="getGreetingsReturn"?type="xsd:string"/>
????????????????????</sequence>
????????????????</complexType>
????????????</element>
??????????
????????</schema>
????</wsdl:types>
????<wsdl:message?name="getGreetingsRequest">
????????<wsdl:part?element="tns:getGreetings"?name="parameters"/>
????</wsdl:message>
????<wsdl:message?name="getGreetingsResponse">
????????<wsdl:part?element="tns:getGreetingsResponse"?name="parameters"/>
????</wsdl:message>
????<wsdl:portType?name="HelloWorld">
????????<wsdl:operation?name="getGreetings">
????????????<wsdl:input?message="tns:getGreetingsRequest"?name="getGreetingsRequest"/>
????????????<wsdl:output?message="tns:getGreetingsResponse"?name="getGreetingsResponse"/>
????????</wsdl:operation>
????</wsdl:portType>
????<wsdl:binding?name="HelloWorldSoapBinding"?type="tns:HelloWorld">
????????<wsdlsoap:binding?style="document"?transport="http://schemas.xmlsoap.org/soap/http"/>
????????<wsdl:operation?name="getGreetings">
????????????<wsdlsoap:operation?soapAction=""/>
????????????<wsdl:input?name="getGreetingsRequest">
????????????????<wsdlsoap:body?use="literal"/>
????????????</wsdl:input>
????????????<wsdl:output?name="getGreetingsResponse">
????????????????<wsdlsoap:body?use="literal"/>
????????????</wsdl:output>
????????</wsdl:operation>
????</wsdl:binding>
????<wsdl:service?name="HelloWorldService">
????????<wsdl:port?binding="tns:HelloWorldSoapBinding"?name="HelloWorldSoapPort">
????????????<wsdlsoap:address?location="http://localhost:8085/HelloWorldService"/>
????????</wsdl:port>
????</wsdl:service>
</wsdl:definitions>
*
HelloWorldService.javapackage?helloworld;
import?org.osoa.sca.annotations.Remotable;
@Remotable
public?interface?HelloWorldService?{
????public?String?getGreetings(String?name);
}
* HelloWorldImpl.javapackage?helloworld;
import?org.osoa.sca.annotations.Service;
@Service(HelloWorldService.class)
public?class?HelloWorldImpl?implements?HelloWorldService?{
????public?String?getGreetings(String?name)?{
????????return?"hello?"+name;
????}
}
這樣我們就可以寫一個(gè)類來創(chuàng)建一個(gè)SCA中的Domain，并由它來創(chuàng)建組件并發(fā)布為一個(gè)web服務(wù)。
public?class?HelloWorldServer?{
????public?static?void?main(String[]?args)?{
????????SCADomain?scaDomain?=?SCADomain.newInstance("","","Calculator.composite","Employee.composite");
????????try?{
????????????System.out.println("HelloWorld?server?started?(press?enter?to?shutdown)");
????????????System.in.read();
????????}?catch?(IOException?e)?{
????????????e.printStackTrace();
????????}
????????scaDomain.close();
????????System.out.println("HelloWorld?server?stopped");
????}
}
運(yùn)行這個(gè)類，也就啟動(dòng)了一個(gè)SCA的Domain，打開瀏覽器輸入http://localhost:8085/HelloWorldService?
wsdl（注意這個(gè)是以binding.ws的uri為準(zhǔn)的，和wsdl文件中的wsdlsoap:address的location無關(guān)，當(dāng)然在這里它
們倆個(gè)是一致的），就可以看到發(fā)布的服務(wù)的wsdl描述，應(yīng)該和前面的helloworld.wsdl的內(nèi)容一樣。
下面我們寫一個(gè)groovy的客戶端來測試一下這個(gè)web服務(wù)，代碼大概象這樣（更多的信息可以參考
http://docs.codehaus.org/display/GROOVY/Groovy+SOAP
，要運(yùn)行下面的代碼需要先安裝一個(gè)groovy的用來除了soap的類庫）：
import?groovy.net.soap.SoapClient
def?proxy?=?new?SoapClient("http://localhost:8085/HelloWorldService?wsdl")
println?proxy.getGreetings("yanhua")
運(yùn)行它，在控制臺(tái)可以看到
hello yanhua了嗎？
有時(shí)候我們想查看一下客戶端和服務(wù)器之間來往的soap消息，我們可以用AXIS提供的一個(gè)叫TCPMonitor的工具。先下載AXIS，解壓后在AXIS的目錄下運(yùn)行如下的命令：java
-classpath ./lib/axis.jar
org.apache.axis.utils.tcpmon，這樣會(huì)打開TCPMonitor這個(gè)工具。我們新建一個(gè)Listener，設(shè)置如下圖：
我們把剛才的groovy代碼改一下：
import?groovy.net.soap.SoapClient
def?proxy?=?new?SoapClient("http://localhost:8081/HelloWorldService?wsdl")
println?proxy.getGreetings("yanhua")
運(yùn)行它，在TCPMonitor中就可以看到往返的soap消息了，對這個(gè)例子來說分別是：
發(fā)送到服務(wù)器的soap消息：POST?/HelloWorldService?HTTP/1.1
SOAPAction:?""
Content-Type:?text/xml;?charset=UTF-8
User-Agent:?Mozilla/4.0
(compatible;?MSIE?6.0;?Windows?NT?5.0;?XFire?Client?+http://xfire.codehaus.org)
Host:?127.0.0.1:8081
Expect:?100-continue
Content-Length:?308
<soap:Envelope?xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soap:Body>
? <getGreetings?xmlns="http://helloworld">
??? <name?xmlns="http://helloworld">yanhua</name>
? </getGreetings>
</soap:Body>
</soap:Envelope>
返回給客戶端的soap消息：POST?/HelloWorldService?HTTP/1.1
SOAPAction:?""
Content-Type:?text/xml;?charset=UTF-8
User-Agent:?Mozilla/4.0?(compatible;?MSIE?6.0;?Windows?NT?5.0;?XFire?Client?+http://xfire.codehaus.org)
Host:?127.0.0.1:8081
Expect:?100-continue
Content-Length:?308
<soap:Envelope?xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soap:Body>
? <getGreetings?xmlns="http://helloworld">
??? <name?xmlns="http://helloworld">yanhua</name>
?? </getGreetings>
</soap:Body>
</soap:Envelope>