[Java] [Olingo V4] Integrating with HttpServer

[My Kro <my...@gmail.com>]

First off, I'm completely new to Olingo, and only slightly less new to
javax.ws.rs I'm afraid.

I have a legacy Java application to which I've added a jersey instance:

ResourceConfig config = new MyResourceConfig();
HttpServer server = JdkHttpServerFactory.createHttpServer(myURI, config);

Spent a day creating resources and playing around with URL syntax, till I
learnt about the OData standard.  Great I thought and grabbed Olingo V4 hot
off the press. But the tutorials assume that I'm building a new web
application, or at least a HttpServlet implementation.

A recent post on this mailing list indicated that while the
javax.ws.rs dependency
has been dropped in V4 I could still attach the handler somehow.  So I've
copied some files from the Cars sample and this is as far as I've got:

public void attach(HttpServer server) throws IllegalStateException {
try {
DataProvider dataProvider = new DataProvider();
OData odata = OData.newInstance();
EdmxReference reference = new
EdmxReference(URI.create("../v4.0/cs02/vocabularies/Org.OData.Core.V1.xml"));
reference.addInclude(new EdmxReferenceInclude("Org.OData.Core.V1", "Core"));
ServiceMetadata serviceMetadata = odata.createServiceMetadata(
new CarsEdmProvider(),
Collections.singletonList(reference));
ODataHttpHandler handler = odata.createHandler(serviceMetadata);
handler.register(new CarsProcessor(dataProvider));

// Attach to our server we created before
server.createContext("odata.svc", handler);

***** COMPILE ERROR *****
The method createContext(String, HttpHandler) in the type HttpServer is not
applicable for the arguments (String, ODataHttpHandler)
**********************************

} catch (final RuntimeException e) {
}
}

I'm afraid I'm stuck here, would greatly appreciate any assistance to glue
OData to my HTTPServer, or at least a whack over the head and a pointer to
a better way.  Thanks :)

RE: delta token odata provider example

["Amend, Christian" <ch...@sap.com>]

Hi,

the best source is the Olingo website tutorial section: http://olingo.apache.org/doc/odata2/index.html 

Here is the tutorial for plain delta: http://olingo.apache.org/doc/odata2/tutorials/delta.html
Here for JPA delta: http://olingo.apache.org/doc/odata2/tutorials/DeltaQuerySupport.html

Best Regards,
Christian

From: GuopingZhang [mailto:goodier_cn@hotmail.com] 
Sent: Montag, 12. Oktober 2015 10:11
To: user@olingo.apache.org
Subject: delta token odata provider example


Does anyone have a delta token odata provider example ?
Thanks!

delta token odata provider example

[GuopingZhang <go...@hotmail.com>]

Does anyone have a delta token odata provider example ?
Thanks!
 		 	   		  

Re: [Java] [Olingo V4] Integrating with HttpServer

["Bolz, Michael" <mi...@sap.com>]

Hi,

First, to process requests with “java.ws.rs” you have to annotate a class/method accordingly to “javax.ws.rs <http://javax.ws.rs/>” with the “@Path” annotation (see code sample below).
Within this method you then can do the same as in the samples (with the HttpServlet).
Second, I will check also your issue about how do you use the Jersey instance. However, therefore I have to read more about Jersey  ;o)

Best Regards,
Michael

…
@Ptath(”/“)
public class SampleJaxRs {
	@GET
	public void handleGetRequests() {
		// olingo read stuff
	}
}

OR

@Path("/{servicename}/*")
public void handleRequest() {…}



> On 09 Oct 2015, at 01:47, My Kro <my...@gmail.com> wrote:
> 
> First off, I'm completely new to Olingo, and only slightly less new to javax.ws.rs <http://javax.ws.rs/> I'm afraid.
> 
> I have a legacy Java application to which I've added a jersey instance:
> 
> 		ResourceConfig config = new MyResourceConfig();
> 		HttpServer server = JdkHttpServerFactory.createHttpServer(myURI, config);
> 
> Spent a day creating resources and playing around with URL syntax, till I learnt about the OData standard.  Great I thought and grabbed Olingo V4 hot off the press. But the tutorials assume that I'm building a new web application, or at least a HttpServlet implementation.  
> 
> A recent post on this mailing list indicated that while the javax.ws.rs <http://javax.ws.rs/> dependency has been dropped in V4 I could still attach the handler somehow.  So I've copied some files from the Cars sample and this is as far as I've got:
> 
> 	public void attach(HttpServer server) throws IllegalStateException {
> 		try {
> 			DataProvider dataProvider = new DataProvider();
> 			
> 			OData odata = OData.newInstance();
> 			EdmxReference reference = new EdmxReference(URI.create("../v4.0/cs02/vocabularies/Org.OData.Core.V1.xml"));
> 			reference.addInclude(new EdmxReferenceInclude("Org.OData.Core.V1", "Core"));
> 			
> 			ServiceMetadata serviceMetadata = odata.createServiceMetadata(
> 					new CarsEdmProvider(),
> 					Collections.singletonList(reference));
> 			ODataHttpHandler handler = odata.createHandler(serviceMetadata);
> 			handler.register(new CarsProcessor(dataProvider));
> 
> 			// Attach to our server we created before
> 			server.createContext("odata.svc", handler);
> 
> ***** COMPILE ERROR *****
> The method createContext(String, HttpHandler) in the type HttpServer is not applicable for the arguments (String, ODataHttpHandler)
> **********************************
> 
> 		} catch (final RuntimeException e) {
> 		}
> 	}
> 
> I'm afraid I'm stuck here, would greatly appreciate any assistance to glue OData to my HTTPServer, or at least a whack over the head and a pointer to a better way.  Thanks :)