/*
 * Copyright 2013-2015 the original author or authors.
 *
 * 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 tools;

import java.io.IOException;
import java.net.URI;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.web.client.DefaultResponseErrorHandler;
import org.springframework.web.client.RequestCallback;
import org.springframework.web.client.ResponseExtractor;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;

/**
 *
 * RestTemplate that logs erroneous responses and throws AssertionsError on any connection issues
 *
 * @author Marcin Grzejszczak
 */
public class AssertingRestTemplate extends RestTemplate {

	private static final Log log = LogFactory.getLog(AssertingRestTemplate.class);

	public AssertingRestTemplate() {
		setErrorHandler(new DefaultResponseErrorHandler() {
			@Override
			public void handleError(ClientHttpResponse response) throws IOException {
				if (hasError(response)) {
					log.error("Response has status code [" + response.getStatusCode() + "] and text [" + response.getStatusText() + "])");
				}
			}
		});
	}

	@Override
	protected <T> T doExecute(URI url, HttpMethod method, RequestCallback requestCallback, ResponseExtractor<T> responseExtractor) throws RestClientException {
		try {
			return super.doExecute(url, method, requestCallback, responseExtractor);
		} catch (Exception e) {
			log.error("Exception occurred while sending the message to uri [" + url +"]. Exception [" + e.getCause() + "]");
			throw new AssertionError(e);
		}
	}
}
