Build an Apache Wink REST service(1)

Build an Apache Wink REST service(一)
Apache Wink service configuration
Apache Wink applications are typically deployed in a servlet container like Apache Tomcat and packaged as a WAR file. Like any other Web application, Apache Wink services also need a web.xml file
web.xml Web configuration file    as following:

<web-app><display-name>Wink demo</display-name><description>Demonstration of SDK features</description><!-- Wink SDK servlet configuration. This servlet handles HTTP requestsof SDK web service on application server.--><servlet><servlet-name>restSdkService</servlet-name><servlet-class>org.apache.wink.server.internal.servlet.RestServlet</servlet-class><init-param><param-name>applicationConfigLocation</param-name><param-value>/WEB-INF/application</param-value></init-param></servlet><servlet-mapping><servlet-name>restSdkService</servlet-name><url-pattern>/rest/*</url-pattern></servlet-mapping></web-app>

@Workspace Annotation
The following example demonstrates the use of @Workspace annotation on the resources in order to
have the auto-generated APP service document contain the information about it.
Given the following collection Resources definitions, ResourceA the result is displayed in
the "Auto Generated APP Service Document" table that follows.

@Workspace(workspaceTitle = "Services", collectionTitle = "Service1")@Path("services/service1")public class ResourceA {    @POST    @Produces("text/plain")    @Consumes({"application/atom+xml", "application/xml"})    public String getText() {return "hey there1";}}

Auto Generated APP Service Document

<service xmlns:atom=http://www.w3.org/2005/Atom         xmlns="http://www.w3.org/2007/app">    <workspace>        <atom:title>Services</atom:title>        <collection href="services/service1">            <atom:title>Service1</atom:title>            <accept>application/xml</accept>            <accept>application/atom+xml</accept>        </collection>    </workspace></service>

@Scope Annotation Specification
The following example illustrates how to define a resource with a singleton lifecycle

@Scope(ScopeType.SINGLETON)@Path("service1")public class ResourceA {    ...}

some kinds of lifescopes is below ,you can choose one which you need during your
coding
PROTOTYPE, SINGLETON
@Parent Annotation
The @Parent annotation provides the ability to define a base template URI for the URI specified in a
resources @Path annotation.If a resource is annotated with the @Parent annotation, the Apache Wink runtime calculates the final
resource template by first retrieving the value of the @Parent annotation, which holds the parent resource class, and then concatenates the resource path template definition to the path template definition of the parent resource.example is following:

@Path("services")public class ParentResource {    ...}@Parent(ParentResource .class)@Path("service1")public class ResourceA {    ...}

In the example, the user defined two resources: A ParentResource and ResourceA. ParentResource
defines the @Path annotation to associate it with "services" URI. ResourceA defines the @Path
annotation to associate it with "service1" URI and defines ParentResource to be its parent by specifying
it in the @Parent annotation. In this case, the final URI path for ResourceA is "services/service1".

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