Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Jersey

2,115 views

Published on

Published in: Technology, Education
  • Be the first to comment

Jersey

  1. 1. JAX-RS & JERSEY Yung-Lin Ho <yho@bluetangstudio.com> founder of blue tang studio
  2. 2. ABOUT ME• Yung-Lin Ho. AKA HYL.• founder of blue tang studio• Working on Location Based Platform • Cassandra / Zookeeper • Lucene • Tapestry / Jersey • Scala !
  3. 3. WEBSERVICE IN YEAR 2000• Servlet API • public void doGet(HttpServletRequest request, HttpServletResponse response) { String name = request.getParameter(“name”); NameParameterValidator.validate(name); Object resObj = requestProcessor.process(name); Serializer ser = ObjectSerializerFactory.getSerializer(request.getParameter(“format”)) ser.write(resObj, response); }• Struts • Action, Validator, Processor...
  4. 4. YEAR 2005• SOAP, Apache Axis, Apache CXF• XML configuration HELL. • no compile time check. • keep code and configuration in-sync.
  5. 5. OPEN SOURCE WORLD• Restful Requestsurlpatterns = patterns(, (r^articles/2003/$, news.views.special_case_2003), (r^articles/(?P<year>d{4})/$, news.views.year_archive), (r^articles/(?P<year>d{4})/(?P<month>d{2})/$, news.views.month_archive), (r^articles/(?P<year>d{4})/(?P<month>d{2})/(?P<day>d+)/$,news.views.article_detail),)• Rest won the battle. SOAP started to fad. • why?
  6. 6. ANNOTATION COME TO RESCUE @Path("/rest/1.0/model/{modelId}") @Produces({"application/json"}) public interface DataService { @GET @Path("/doc/{docId}") public Document get(@PathParam(“modelId”) UserModelId modelId, @PathParam("docId") DocumentId documentId); @PUT @Path("/doc/{docId}") @Consumes({"application/json"}) public void saveOrUpdate(@PathParam(“modelId”) UserModelId modelId @PathParam("docId") DocumentId documentId, Document document); @DELETE @Path("/doc/{docId}") public void delete(@PathParam(“modelId”) UserModelId modelId @PathParam("docId") DocumentId documentId);}
  7. 7. URL AND PATTERN MATCHING• @Path("/rest/1.0/model/{modelId}")• @GET, @POST, @PUT, @DELETE, @HEAD• @PathParam, @QueryParam, @FormParam, @HeaderParam, @CookieParam and @MartixParam• @DefaultValue
  8. 8. OBJECT SERIALIZATION• @Produce & @Consume• POJO, JAXB, Jackson-Json.@XmlRootElement {"name":"Agamemnon", "age":"32"}public class MyJaxbBean { public String name; public int age; public MyJaxbBean() {} // JAXB needs this public MyJaxbBean(String name, int age) { this.name = name; this.age = age; }}
  9. 9. FINALLY. JERSEY.• what is jersey - a servlet javax.ws.rs.core.Application• ways to contributes RootResource(s) to Application. <servlet> <servlet-name>Jersey Web Application</servlet-name> <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class> <init-param> <param-name>com.sun.jersey.config.property.packages</param-name> <param-value>org.foo.rest;org.bar.rest</param-value> </init-param> </servlet> public class MyApplicaton extends Application { public Set<Class<?>> getClasses() { Set<Class<?>> s = new HashSet<Class<?>>(); s.add(HelloWorldResource.class); return s; } }
  10. 10. ROOTRESOURCE LIFECYCLE• New class instance for each request if you put class into Application• Same instance for all requests if you put class instance into Application.
  11. 11. WADL• @Path("/form")@ProduceMime("text/html") public class Form { @Path("colours") public Colours getColours() { return coloursResource; } }<?xml version="1.0" encoding="UTF-8" standalone="yes"?><application xmlns="http://research.sun.com/wadl/2006/10"> <resources base="http://localhost:9998/resources/"> <resource path="/form"> <method name="GET"> <response> <representation mediaType="text/html" /> </response> </method> <method name="POST"> <request> <representation mediaType="application/x-www-form-urlencoded" /> </request> <response> <representation mediaType="text/html" /> </response> </method> <resource path="colours" /> </resource> </resources></application>
  12. 12. CLIENT API• https://github.com/yunglin/common-jaxrs-client SearchServiceClient client = ClientFactory.getClient( SearchServiceClient.class, endPoint, myModel);•
  13. 13. QA

×