java - RESTEasy Client Exception Handling -

i have simple client using resteasy follows:

public class test {     public static void main(string[] args) {         resteasyclient client = new resteasyclientbuilder().build();         resteasywebtarget target = client.target("http://localhost");         client.register(new mymapper());         myproxy proxy = target.proxy(myproxy.class);         string r = proxy.gettest();     } }  public interface myproxy {    @get    @path("test")    string gettest(); }  @provider public class mymapper implements clientexceptionmapper<badrequestexception>{      @override     public runtimeexception toexception(badrequestexception arg0) {         // todo auto-generated method stub         system.out.println("mapped bad request exception");         return null;     }  } 

the server configured return 400 - bad request on http://localhost/test along helpful message. badrequestexception being thrown clientproxy. other wrapping in try/catch, how can make gettest() catch exception , return response's helpful message string. tried various clientexceptionmapper implementations, can seem right. above code doesn't ever call toexception. missing here?

my current work-around use clientresponsefilter , setstatus(200) , stuff original status in response entity. way avoid exception throws.

i'd advise going through jax-rs client api unless there's functionality need using resteasy clients. (resteasy ships jax-rs, there's no library differences)

client client = clientfactory.newclient(); webtarget target = client.target("http://localhost/test"); response response = target.request().get(); if ( response.getstatuscode() != response.status.ok.getstatuscode() ) {     system.out.println( response.readentity(string.class) );     return null; } string value = response.readentity(string.class); response.close(); 

the reason why mapper not work because client not throwing exception. client returning valid result proxy, , proxy reading that, , throwing exception, happens after mapper can intercept it.