I'm using the RestEasy Client Framework in a @Named @ViewScoped Bean with JBoss-7.1.1-Final to retrieve data from a REST service with a custom HttpRequestInterceptor:
RegisterBuiltin.register(ResteasyProviderFactory.getInstance());
DefaultHttpClient httpClient = new DefaultHttpClient();
httpClient.addRequestInterceptor(new PreemptiveAuthInterceptor("test","test"), 0);
ClientExecutor clientExecutor = new ApacheHttpClient4Executor(httpClient); //<---
//The error occurs above, the code below is only for completeness
MyRest rest = ProxyFactory.create(MyRest.class,
"http://localhost:8080/rest",clientExecutor);
This works fine in a standalone client application (also ok when I remove the ClientExecutor, but I need it to authenticate REST service). The bean is in a WAR module inside an EAR, the dependency hierarchy of resteasy resolves to the following:
There are no httpclient or httpcore in the WAR or EAR. Inside the Bean I get the following exception:
java.lang.NoClassDefFoundError: org/apache/http/HttpRequestInterceptor
Seems to be easy (although I'm wondering about the resteasy packaging) and I added org.apache.httpcomponents:httpclient with compile scope:
No I'm getting he following exception:
java.lang.LinkageError: loader constraint violation: when resolving method
"org.jboss.resteasy.client.core.executors.ApacheHttpClient4Executor.<init>
(Lorg/apache/http/client/HttpClient;)V"
the class loader (instance of org/jboss/modules/ModuleClassLoader)
of the current class, my/TestBean, and
the class loader (instance of org/jboss/modules/ModuleClassLoader)
for resolved class,
org/jboss/resteasy/client/core/executors/ApacheHttpClient4Executor,
have different Class objects for the type org/apache/http/client/HttpClient
used in the signature my.TestBean.init(TestBean.java:65)
Update To reproduce this you don't need REST interfaces, the error occurs while instantiating the ApacheHttpClient4Executor, but you may need the custom PreemptiveAuthInterceptor:
public class PreemptiveAuthInterceptor implements HttpRequestInterceptor
{
private String username;
private String password;
public PreemptiveAuthInterceptor(String username, String password)
{
this.username=username;
this.password=password;
}
@Override
public void process(org.apache.http.HttpRequest request, HttpContext context) throws HttpException, IOException
{
AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);
authState.setAuthScope(org.apache.http.auth.AuthScope.ANY);
authState.setCredentials(new UsernamePasswordCredentials(username,password));
authState.setAuthScheme(new BasicScheme());
}
}