TuscanySCA6-SCA安装模型

TuscanySCA6-SCA装配模型

1. Component, service, reference and property naming conventions

??? SCA规范名没有定义它们的命名规范，下面只是推荐的命名格式：
??? (1) Component,Service以大写字母开头，驼峰式命名；

??? (2) Reference,property默认以小写字母开头。

2. 组合定义文件
??? 组合是被用来定义服务、组件和引用的容器。它被用来将SCA制品装配成逻辑分组的组件。SCA 组合可粗略的认

??? 为是和Spring中通常被称作应用程序上下文（application context）的XMl文件类似的东西，而component元

??? 素，则和Spring配置文件中定义的bean元素在功能上类似。
??? SCA组合装配XML示例，problemMgmt.composite.xml：
??? <?xml version="1.0" encoding="ISO-8859-15"?>
??? <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
????????????? xmlns:hw="http://opensoa.book.chapter3" name="ProblemManagementComposite"
??? ??? ??? ? targetNamespace="http://opensoa.book.chapter3">
?????? <service name="ProblemTicketComponent" promote="ProblemTicketComponent">
????????? <binding.ws uri="http://localhost:8085/ProblemTicketService"/>
?????? </service>
?? ??? <component name="ProblemTicketComponent">
? ? ? ? ? <implementation.java target="CreateTicketComponent"/>
?????? </component>
?????? <component name="CreateTicketComponent">
?????????? <implementation.java promote="ProblemTicketComponent">
??? ??? <interface.java
???????? interface="opensoa.book.chapter3_23.ProblemTicketComponent" />
??? ???
??? ??? <binding.ws uri="http://localhost:8085/ProblemTicketService" />
??? </service>

5. 使用属性

??? <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
????????? targetNamespace="http://opensoa.book.chapter3"
????????? xmlns:hw="http://opensoa.book.chapter3"
????????? name="ProblemManagementComposite">

????????? <!-- VARIANT 1
????????? <property name="username">jdoe@mycompany.com</property>
????????? <property name="password">mypassword1</property>
????????? -->
???
????????? <!-- VARIANT 2 -->
????????? <property name="credentials" type="hw:CredentialsType">
??? ?????????? <Credentials>
??? ??? ???????????? <username>jdoe@mycompany.com</username>
??? ??? ?? ? ? ????? <password>mypassword1</password>
??? ?????????? </Credentials>
????????? </property>
???
????????? <service name="ProblemTicketComponent"? promote="ProblemTicketComponent">
??? ?????????? <binding.ws uri="http://localhost:8085/ProblemTicketService" />
????????? </service>

????????? <component name="ProblemTicketComponent">
??? ??????????? <implementation.java
??? ??? ??????????????? />

??? ??????????? <!-- use w/VARIANT 1
??? ??????????????????? <property name="username" source="$username" />
??? ??????????????????? <property name="password" source="$password" />
??? ?? ? ?????? -->
??? ???
??? ??????????? <!--? use w/VARIANT 2 -->
??? ???????????? <property name="username" source="$credentials/*[local-name()='Credentials']/
??? ??? ??? ?? ? ? ? ? ?? *[local-name()='username']" />
??? ?? ? ??????? <property name="password" source="$credentials/*[local-name()='Credentials']/
??? ??? ??? ????????????? *[local-name()='password']" />
???
??? ???????????? <reference name="createTicket" target="CreateTicketComponent" />
?????????? </component>

?????????? <component name="CreateTicketComponent">
??? ?????????????? <implementation.java
??? ??? ???????????????? />
?????????? </component>

???? </composite>

?

???? @Service(ProblemTicketComponent.class)??? ??? ??? ???
???? public class ProblemTicketComponentImpl implements ProblemTicketComponent {

???????? /*第一种使用方式*/
???????? @Property
???????? protected String username;
???????? @Property
???????? protected String password;

?

???????? /* 另一种使用方式 */

???????? protected String username;

???????? @Property(name="username")

???????? public void setMyUserName(String username){

??????????????? this.username = username

???????? }
??? ??
???????? private CreateTicketComponent createTicket;??? ??? ??? ???

???????? public int createTicket(TicketDO ticket) {
?????????????? System.out.println(ticket.toString());
?????
?????????????? /* username variable passed as injected property value */
?????????????? System.out.println("username is: " + username);
?????
?????????????? return createTicket.create(ticket);
???????? }

? ? ? ?? /* Note, instead of using a setter, you could inject the reference
????????? * directly at the variable reference level, similar to what
????????? * is done for the propery injections shown above.
????????? */
???????? @Reference??? ??? ??? ??? ??? ??? ??? ???
???????? public void setCreateTicket(CreateTicketComponent createTicket) {
?????????????? this.createTicket = createTicket;
???????? }
??? }

6. 实现选项

??? Apache Tuscany 的SCA实现类型：

??? Java组件，Spring程序集，脚本：JS,Groovy，Ruby,Pythin,XSLT,BPEL,XQuery,OSGi

??? 实现组示例：

??? <?xml version="1.0" encoding="ISO-8859-15"?>
??? <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
?????????? xmlns:hw="http://opensoa.book.chapter325"
? ? ?? ??? name="IssueManagementComposite"
?????????? targetNamespace="http://opensoa.book.chapter325">
???
? ? ? ? ? <service name="SystemErrorService" promote="SystemErrorComponent">
??????????????????? <binding.ws uri="http://localhost:8085/SystemErrorService"/>
????????? </service>
?
????????? <component name="SystemErrorComponent">
??????????????? <implementation.java??

????????????????????????? target="ProblemTicket"/>
????????? </component>
?
????????? <component name="ProblemTicket">
????????????????? <implementation.composite name="hw:ProblemManagementComposite"/>
????????? </component>
????? </composite>

?

????? 实现类：

????? @Service(SystemErrorComponent.class)
????? public class SystemErrorComponentImpl implements? SystemErrorComponent {

???????????? @Reference
???????????? public ProblemTicketComponent problemTicket;

???????????? public int systemProblem(String system, String title,String problem) {
?????????????????? System.out.println("*** SystemErrorComponentImpl ***");
?????????????????? int rval = 0;
?????
?????????????????? TicketDO ticket = new TicketDO();
?????????????????? ticket.setSubject(title);
?????????????????? ticket.setSubject(problem);
?????????????????? ticket.setSource(system);

???? ? ? ? ? ? ??? rval = problemTicket.createTicket(ticket);
?????
?????????????????? System.out.println("problemTicket:" + rval);
?????
?????????????????? return rval;
??????????? }
????? }

7. 使用引用进行依赖注入

??? <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
???????? targetNamespace="http://opensoa.book.chapter3"
? ? ???? xmlns:hw="http://opensoa.book.chapter3"
???????? name="IssueManagementComposite">

???????? <service name="SystemErrorService" promote="SystemErrorComponent">
??? ?????????? <binding.ws uri="http://localhost:8085/SystemErrorService" />
? ?????? </service>

???????? <component name="SystemErrorComponent">
??? ????????? <implementation.java
??? ??? ??????????? />
???????? </component>

???????? <reference name="ProblemTicket" promote="SystemErrorComponent/problemTicket">
??? ?????????????? <binding.ws uri="http://localhost:8086/ProblemTicketService" />
???????? </reference>
???? </composite>

?

???? @Reference
????? public void setProblemTicket(ProblemTicketComponent problemTicket) {
??????????? this.problemTicket = problemTicket;
????? }

8. 定义可用的绑定

??? Apache Tuscany的绑定类型：

??? WebService， JMs,? JSON-RPC，EJB,? Feed

??? 将多个Web服务合并到单个WSDL文件中：

??? <composite
????????? xmlns="http://www.osoa.org/xmlns/sca/1.0"
????????? targetNamespace="http://opensoa.book.chapter327"
??????? ? xmlns:hw="http://opensoa.book.chapter327"
????????? name="IssueManagementComposite">

????????? <service? name="SystemErrorService" promote="SystemErrorComponent">

????????? <binding.ws?? wsdlElement="http://chapter327.book.opensoa#wsdl.binding(

????????????? SystemErrorServiceJMSBinding)"?????

????????????? uri="jms:/SystemErrorInQueue?transport.jms

????????????? .ConnectionFactoryJNDIName=QueueConnectionFactory

????????????? &amp;java.naming.factory.initial=org.apache.activemq

????????????? .jndi.ActiveMQInitialContextFactory&amp;java.naming.provider.url

????????????? =tcp://localhost:61616?wireFormat.maxInactivityDuration=0" />

????????? <binding.ws
????????? wsdlElement="http://chapter327.book.opensoa#wsdl.port(SystemErrorService/SOAP)" />

??? ????? <!--
????????? <binding.ws uri="http://localhost:8085/SystemErrorService" />
????????? -->
????????? </service>

????????? <component name="SystemErrorComponent">
???????????????? <implementation.java
?????????????????????? />
????????
????????? <reference?? name="problemTicket"???? target="ProblemTicket" /></component>

????????? <component name="ProblemTicket">
??????????????? <implementation.composite name="hw:ProblemManagementComposite" />
????????? </component>??
??? </composite>

??? SCA与远程协议(如：Web Service)之间的不同：

??? SCa定义可入如何将网络服务装配成可用的应用程序，并且提供了一种语言用于描述这种装配；而Web Service

??? 描述了怎样使用协议去调用单个的服务。