SCA组件类型配置
??? 使用该方式可以替换SCA中的Java注解方式。一般情况下，可用组件类型文件来表明属性，而用注解来标示出引用和
服务。创建默认组件类型文件命名习惯：
??? <componetn-implementation-class>.componentType
??? 例如:ProblemTicketComponentImplNA.componentType:
??? <componentType
??????????? xmlns="http://www.osoa.org/xmlns/sca/1.0"
??????????? xmlns:xsd="http://www.w3.org/2001/XMLSchema">
??????????? <service name="ProblemTicketComponent">
??????????? <interface.java
???????????????????? interface="opensoa.book.chapter4_1.ProblemTicketComponent" />
??????????? </service>
??????????? <reference name="createTicket">
???????????????????? <interface.java
??????????????????????????? interface="opensoa.book.chapter4_1.CreateTicketComponent" />
??????????? </reference>
??????????? <property name="username" type="xsd:string" />
??????????? <property name="password" type="xsd:string" />
???? </componentType>
?
