Develop Reference

HttpClient vs Spring Rest Template?

What's the best way to make a REST call?
Should I use Apache Http Client or Should I use Spring Rest Template.
On what basis I can decide which one I should go for?
I need to make a call to this url-
http://localhost:8080/service/Service/v1/get/USERID=10000/profile.ACCOUNT.SERVICE"
And after getting the response back, I just need to see whether that response contains any particular string or not.

Spring RestTemplate follows the pattern for all the *Template classes within the core Spring framework and the various sub-frameworks: JdbcTemplate, HibernateTemplate, WebServiceTemplate etc etc.
The idea of all of these Template classes is to reduce the boilerplate code (exception handling, repetitive stuff and concentrate on your business logic). I would definitely use it over the simple HttpClient.
To get the class you'll need the spring-web dependency.

How to create a web service proxy? Can we generate #Endpoints?

I'm working on a web-service-proxy with auditing (later on with caching = creating own responses) and I need to generate #Endpoints (such that will just forward i.e. call a remote web service or dummy atleast). Marshaling/unmarshaling seems neccessary for the proxy will add "something" to the request...
We are to use spring-ws and JAXB. Got all XSDs and static WSDLs of the proxied web service.
Any hints around? Anyone doing something similar? How are you doing it?
Is there a simple way how to achieve this using spring or spring-integration?
Thanks in advance..

This should be possible using both Spring WS and Spring Integration:
With Spring WS, you can create a proxy class for your remote WS, wrapping around a org.springframework.ws.client.core.WebServiceTemplate to talk to the WS - which has API's to take care of marshalling the request to xml and unmarshalling the response.
With Spring Integration, you can use an outbound Webservices gateway , but you will need to front it with a messaging gateway, which will act as your proxy, along these lines:
<int:gateway id="wsproxy" service-interface="..ProxyInterface" default-request-channel="requestChannel" default-reply-channel="replyChannel"/>
<int-ws:outbound-gateway id="wsGateway" request-channel="requestChannel" uri="http://serviceURL" marshaller="someMarshaller" unmarshaller="someUnmarshaller"/>
However, I would recommend the first approach of using the WebserviceTemplate, as you do not have a very complex integration need here.

Today I can tell how we proceeded without spring-integration. We found two different ways how to generate #Endpoint class.
1) Using XSLT and Freemarker we generated the endpoint class source in pre-compile phase. XSLT transformation walked thru all WSDL files to create one summary file which was then used to generate the source.
2) Using Javassist we copied the template class, then generated methods regarding content of JAXB2Marshaller instance and finally instantiated object using FactoryBean, all at server start-up.
Problem here we met was set of XSD files written in form that caused the root objects were generated without #XmlRootAnnotation. Javassist version we had internally works with Java 1.4 (no generics) so we used global customization file for XJC and forced #XmlRootAnnotation on root objects.
Both solutions have their pros and cons but both are simpler then using ESB.

springframework controller from standalone java code

We have Spring MVC application. One module requires to call the Spring Controller from standalone java app.
Can I do that?

Dead easy:
new java.net.URL("http://localhost:8080/path/to/your/controller").openStream();
Just like you would do it in the browser. If you want to call the Java code directly, do not publish your controllers. Instead, extract business logic and provide it as a library.

Yes.
It's a POJO, especially if you use Spring 3.x. The newest versions don't even extend an interface or base class.

I'd call it through its http interface as it's a Spring controller. You could use a clientside http request and use the response. I'm guessing the method you wish to call does not resolve to a view, if that's the case then just use something like the RestTemplate class that comes with Spring 3.
Not sure if it would be a good idea to call it directly as Spring MVC projects are usually hidden away inside servlet wars.

Java rest framework with programmable dispatcher?

I'm searching a java rest framework or JAX-RS implementation that allows me to configure the dispatcher at runtime through an API. In JAX-RS it is only possible to do the configuration with #Path and #HttpMethod annotations or by effectively building your own dispatcher in a sub-resource.
I'm searching for:
dispatcher.addResource("/my/{path}", Resource.class) or
dispatcher.addResource("/2nd/path", resourceHandlerFactory)

Unfortunately there is nothing in JAX-RS for dynamic resource specification as you've found. Apache Wink has another alternative to Restlet called DynamicResource http://incubator.apache.org/wink/1.1/html/5.1%20Registration%20and%20Configuration.html. I'd be quite interested in why you need dynamic resources as I had similar requirement.

Try Restlet. It provides runtime dispatch functionality through its Router class. See http://wiki.restlet.org/docs_2.1/13-restlet/27-restlet/326-restlet.html for an example.

Consuming Java Web Service from .NET

I have a web service written in Java now I want to consume that web service in the .NET world. I use the WSDL to add a proxy class to my .NET application but when I invoke the Java web service method the response is always null. Anyone familiar with this issue?
UPDATE 1:
Another thing I noted is that I opened one of the svcinfo files and found the following code:
<endpoint normalizedDigest="<?xml version="1.0" encoding="utf-16"?><Data address="http://fff.mywebserive/somewebservie" binding="basicHttpBinding" bindingConfiguration="DOC_TOI_Binding" contract="ServiceReference1.DOC_TOI_PortType" name="DOC_TOI_Port" />" digest="<?xml version="1.0" encoding="utf-16"?><Data
This does not look right to me!
UPDATE 2: Solution (Kind of)
The problem was that the response had a different namespace than used by the client proxy class. This way the object was never deserialized correctly. Once, I changed the namespace to match the response namespace it worked fine. But now if I update the web service reference I will again get the same issue as the namespace will be updated. What is a good way to solve this problem? The only solution I can think of is to ask the creator of the webservice to use the correct namespace.

Using .Net, we can add the java web service in our application using Service Referrence or Web Service Referrence.
Service Reference - This is a dedicated way of calling Microsoft WCF Web Services 3.5 and higher.
Web Service Reference - Way of referencing Non Microsoft Web Service and lower version of Microsoft webservice such as 2.0
We can also use Service reference in non Microsoft web service, we just need to modify some configuration in app.config such as Security Configurations()
Now, when Invoking the web service request method it always ends up with the NULL object response.
(This is caused by the discrepancy between the proxy namespace expected response and the actual xml namespace webservice response )
Sample:
Proxy Code
[return: System.Xml.Serialization.XmlElementAttribute("GetResponse ", Namespace = "http://AJ_TUASON.COM ")]
Public GetResponse Get()
{}
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://AJ_TUASON.COM")]
public partial class GetResponse
{}
Actual XML Namespace Response
webservice:GetResponse xmlns:"http://AJTUASON.COM"
To resolve this issue, install fiddler2. This will helps you track and confirm that the web services are working fine.
Then, copy the actual namespace in the XML response from web service.
Paste the actual xml namespace response in proxy class of .NET:
Sample:
[return: System.Xml.Serialization.XmlElementAttribute("GetResponse ", Namespace = "http://AJTUASON.COM ")]
Public GetResponse Get()
{}
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://AJTUASON.COM")]
public partial class GetResponse
{}
This will resolve the Null issue.
Note: Do not always rely on the tool that generates proxy class. Tools can surely translate but doing analysis is another thing - AJ

It suggests to me that either your WSDL or your client is incorrect. The client should not be able to tell from the WSDL what language it's implemented in. Check your namespaces.
SOAP UI is a very nice tool for testing SOAP services. I'd recommend it for sorting out this issue.
Looks to me like something tried to escape that snippet. You don't want > you want >
You need to make sure that the service and the client are using the same namespace. Communication is paramount here.