Jersey Hibernate Problem

[Rajkumar balakrishnan]

Hi friends,
I am using jersey with Spring for Web Services and i have a simple POST method where a user can send username and password to validate himself. The method for that is

	@POST
	@Path("log")
	@Consumes("application/xml")
	@Produces("text/plain")
	//@Produces("application/xml")
	public Login postMe(WSLogin login) {
			String user = login.getUsername();
			String password = login.getPassword();
			Login log1 = new Login();
			log1.setLogin_name(user);
			log1.setPassword(password);
			int s = 0;
			List<Login> id = ij.getData(log1);// ij is the Hibernate Implementation
			s = id.size();
                        log.info("The List size is : "+s);
			return log1;
	}

It always throw NullPointerException at the line where ij.getData() method gets called,(It works fine in other Controllers). But when i remove it and do other processing that doesnt involve Hibernate it'll work. Say, i check these two variables like these

                     if(user.equals("user') && password.equals("password")){
                             log1.setStatusCode(0);
                     }else{
                             log1.setStatusCode(0);
                     } 

I've heard that jersey isn't compatible with Hibernate. Is that so? If so then what can i do to get it work around? Please help me guys.

[Ulf Dittmer]

I've heard that jersey isn't compatible with Hibernate.

That sounds dubious. When (and how) is the "ij" object initialized to something other than null?

[Rajkumar balakrishnan]

Ulf Dittmer wrote:

I've heard that jersey isn't compatible with Hibernate.

That sounds dubious. When (and how) is the "ij" object initialized to something other than null?

@Path("check")
public class WebServicesImpl implements WebServices {

	@Autowired
	IntermediateJava ij;
	
	@GET
	@Produces("application/xml")
	public WSLogin getMethod() throws JAXBException {
		WSLogin login = new WSLogin();
		login.setPassword("asdfg");
		login.setSessionid("AB56SA*&ASHBJAHS");
		login.setStatuscode(0);
		login.setUsername("hiwebservices");
		JAXBContext context = JAXBContext.newInstance(WSLogin.class);
	    Marshaller marshaller = context.createMarshaller();
	    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
	    marshaller.marshal(login, System.out);
		return login;
	}

	@POST
	@Path("log")
	@Consumes("application/xml")
	@Produces("text/plain")
public Login postMe(WSLogin login) {
			String user = login.getUsername();
			String password = login.getPassword();
			Login log1 = new Login();
			log1.setLogin_name(user);
			log1.setPassword(password);
			int s = 0;
			List<Login> id = ij.getData(log1);// ij is the Hibernate Implementation
			s = id.size();
                        log.info("The List size is : "+s);
			return log1;
	}
}

[Rajkumar balakrishnan]

No matter what, when i try to put DB Code using JPA or with Hibernate it came up with a NullPointerException, otherwise its fine.

[Ulf Dittmer]

@AutoWired is a Spring annotation, not a Jersey nor Hibernate annotation, so I'd look for problems in your Spring setup.

[Rajkumar balakrishnan]

Ulf Dittmer wrote:@AutoWired is a Spring annotation, not a Jersey nor Hibernate annotation, so I'd look for problems in your Spring setup.

Now have a look at this code where i autowired the Database (A Service Impl), which is already configured in XML file.

    private final Database dbase;

    @Autowired
    public CheckWebServices(Database dbase){
    	this.dbase = dbase;
    }
    
	@GET
	@Produces("application/xml")
	public WSLogin getMethod() throws JAXBException {
		WSLogin login = new WSLogin();
		login.setPassword("asdfg");
		login.setSessionid("AB56SA1&ASHBJAHS");
		login.setStatuscode(0);
		login.setUsername("hiwebservices");
		JAXBContext context = JAXBContext.newInstance(WSLogin.class);
	    Marshaller marshaller = context.createMarshaller();
	    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
	    marshaller.marshal(login, System.out);
		return login;
	}
	
	@POST
	@Path("/log")
	@Consumes("application/xml")	
	@Produces("application/xml")
	public WSLogin postMe(WSLogin login) {
			String user = login.getUsername();
			String password = login.getPassword();
			Login log1 = new Login();
			log1.setLogin_name(user);
			log1.setPassword(password);
			login.setStatuscode(1);
			System.out.println("Login name would be : "+log1.getLogin_name());
			dbase.getLogin(log1); // This is the line where a NullPointerException is thrown
 		        return login;
	}

The XML configuration is

<bean id="dbase" class="com.drasis.database.injection.DatabaseImpl"/>

Now. let me know what is the problem. Please i am banging my head in a wall for more than one day.

[Ulf Dittmer]

Moving to a forum appropriate for Spring questions.

[Rajkumar balakrishnan]

Ulf Dittmer wrote:Moving to a forum appropriate for Spring questions.

I didn't think i would have anything to do with Spring as other parts of my code , excluding this is working fine. But when i add Hibernate code in Jersey Resource class, it shows this error. The complete stacktrace is

SEVERE: Servlet.service() for servlet jersey threw exception
java.lang.NullPointerException
	at com.drasis.database.injection.CheckWebServices.postMe(CheckWebServices.java:72)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.sun.jersey.server.impl.model.method.dispatch.
                AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:149)
	at com.sun.jersey.server.impl.model.method.dispatch.
                ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:67)
	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:259)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:133)
	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:83)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:133)
	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:71)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:990)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:941)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:932)
	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:384)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:451)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:632)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)

[Rajkumar balakrishnan]

Even when i change from Jersey to RESTEasy, it won't work. Still showing NullPointerException error. Please someone help me get out from this issue...

[Ulf Dittmer]

How have you made sure that Spring is otherwise working fine? I imagine that there is some kind of initialization that needs to happen - does that run, and run successfully? Can you test that other Spring beans -that have nothing to do with Jersey- are being injected OK?

[Rajkumar balakrishnan]

Ulf Dittmer wrote:How have you made sure that Spring is otherwise working fine? I imagine that there is some kind of initialization that needs to happen - does that run, and run successfully? Can you test that other Spring beans -that have nothing to do with Jersey- are being injected OK?

Yes, rest of them are working fine and when i try to add jersey with Hibernate, it gives me such an error.

[sachin burange]

Try adding getters and setters ij object.
and add AutoWire keyword in top of setter method.

[Rajkumar balakrishnan]

sachin burange wrote:Try adding getters and setters ij object.
and add AutoWire keyword in top of setter method.

Why? Does Constructor Injection wont work? Anyway will try that and be back.

UPDATE :

Still Not working. The Code is :

	private Database dbase;
	
	@Autowired
	public void setWebServiceImpl(Database dbase){
		this.dbase = dbase;
	}
	
	public Database getWebServiceImpl(Database dbase){
		return dbase;
	}

[Ulf Dittmer]

<bean id="dbase" class="com.drasis.database.injection.DatabaseImpl"/>

...

@Autowired
public void setWebServiceImpl (Database dbase){
this.dbase = dbase;
}

Is that how Spring works - the name of a parameter is associated to the ID of a bean? Because otherwise I don't see how this could work. Or is it looking through all beans that implement the "Database" interface?