FailingTestGwt.java

/**
 * Copyright (C) 2009-2012 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.fusesource.restygwt.client.basic;

import org.fusesource.restygwt.client.Defaults;
import org.fusesource.restygwt.client.Dispatcher;
import org.fusesource.restygwt.client.Method;
import org.fusesource.restygwt.client.MethodCallback;
import org.fusesource.restygwt.client.Resource;
import org.fusesource.restygwt.client.RestServiceProxy;
import org.fusesource.restygwt.client.cache.VolatileQueueableCacheStorage;
import org.fusesource.restygwt.client.cache.QueueableCacheStorage;
import org.fusesource.restygwt.client.callback.CachingCallbackFilter;
import org.fusesource.restygwt.client.callback.CallbackFactory;
import org.fusesource.restygwt.client.callback.CallbackFilter;
import org.fusesource.restygwt.client.callback.RetryingCallbackFactory;
import org.fusesource.restygwt.client.dispatcher.CachingDispatcherFilter;
import org.fusesource.restygwt.client.dispatcher.DefaultFilterawareDispatcher;
import org.fusesource.restygwt.client.dispatcher.DispatcherFilter;

import com.google.gwt.core.client.GWT;
import com.google.gwt.junit.client.GWTTestCase;

/**
 * check a server sided failure response will not cause the failure call immediately.
 * instead the test proves there will be 2 retries, where the second one succeeds.
 *
 * @author <a href="mailto:mail@raphaelbauer.com">rEyez</<a>
 */
public class FailingTestGwt extends GWTTestCase {

    private ExampleService service;

    @Override
    public String getModuleName() {
        return "org.fusesource.restygwt.FailingTestGwt";
    }

    public void testFailingConnection() {
        /*
         *  setup the service, usually done in gin
         */
        Resource resource = new Resource(GWT.getModuleBaseURL() + "api/getendpoint");
        service = GWT.create(ExampleService.class);
        ((RestServiceProxy) service).setResource(resource);

        service.getExampleDto(new MethodCallback<ExampleDto>() {
            @Override
            public void onSuccess(Method method, ExampleDto response) {
                fail("got there so server always fails");
            }

            @Override
            public void onFailure(Method method, Throwable exception) {
                // TODO method.getResponse() should not null here
                assertTrue(exception.getMessage().startsWith("Response 504"));
                finishTest();
            }
        });

        delayTestFinish(5000);
    }

    /**
     * usually this stuff is all done by gin in a real application. or at least there
     * would be a central place which is not the activity in the end.
     */
    @Override
    public void gwtSetUp() {
        /*
         * configure RESTY to use cache, usually done in gin
         */
        QueueableCacheStorage cache = new VolatileQueueableCacheStorage();
        
        CallbackFilter cachingCallbackFilter = new CachingCallbackFilter(cache);
        CallbackFactory callbackFactory = new RetryingCallbackFactory(
                100,// grace period millis
                4,// number of retries
                cachingCallbackFilter);
        DispatcherFilter cachingDispatcherFilter = new CachingDispatcherFilter(cache, callbackFactory);
        
        Dispatcher dispatcher = new DefaultFilterawareDispatcher(cachingDispatcherFilter);

        Defaults.setDispatcher(dispatcher);
    }
}