public class ClientConfigurationSnapshotTest { public static class MyFirstFilter implements ClientRequestFilter { @Override public void filter(ClientRequestContext requestContext) throws IOException { System .out.println(MyFirstFilter.class); } } public static class MySecondFilter implements ClientRequestFilter { @Override public void filter(ClientRequestContext requestContext) throws IOException { System .out.println(MySecondFilter.class); } } @Test public void testClientConfigurationSnapshot() { Client client = ClientBuilder.newClient(); try { WebTarget webTarget1 = client.target( "http: //www.google.fr" ); // Register MyFirstFilter (the same if registered as a class or // singleton) webTarget1.register(MyFirstFilter.class); // Register a property webTarget1.property( "property1" , "value1" ); // According to the documentation following instance must inherit of // webTarget1 snapshoted configuration WebTarget webTarget2 = webTarget1.path(""); // webTarget2Configuration inherits of webTarget1 snapshoted // configuration => OK Configuration webTarget2Configuration = webTarget2.getConfiguration(); checkConfiguration(webTarget2Configuration); // Only MyFirstFilter is used => OK webTarget2.request().get().close(); // Register MySecondFilter webTarget1.register(MySecondFilter.class); // Register another property webTarget1.property( "property2" , "value2" ); // webTarget2Configuration actually inherits of more than the // snapshot of webTarget1 configuration => NOK checkConfiguration(webTarget2Configuration); // Both MyFirstFilter and MySecondFilter are used => NOK webTarget2.request().get().close(); } finally { client.close(); } } private void checkConfiguration(Configuration configuration) { Set< Class <?>> classes = configuration.getClasses(); // webTarget2Configuration must contain MyFirstFilter.class Assert.assertTrue(classes.contains(MyFirstFilter.class)); // webTarget2Configuration must not contain MySecondFilter.class Assert.assertFalse(classes.contains(MySecondFilter.class)); // webTarget2Configuration properties must only contain entry // {property1=value1} Assert.assertEquals(Collections.singletonMap( "property1" , "value1" ), configuration.getProperties()); // webTarget2Configuration must only contain contracts for // MyFirstFilter.class Assert.assertFalse(configuration.getContracts(MyFirstFilter.class).isEmpty()); // webTarget2Configuration must not contain contracts for // MySecondFilter.class Assert.assertTrue(configuration.getContracts(MySecondFilter.class).isEmpty()); } }