/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.jclouds.abiquo.handlers;
import static com.google.common.base.Throwables.propagate;
import static javax.ws.rs.core.Response.Status.fromStatusCode;
import java.io.IOException;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.jclouds.abiquo.domain.exception.AbiquoException;
import org.jclouds.abiquo.functions.ParseErrors;
import org.jclouds.http.HttpCommand;
import org.jclouds.http.HttpErrorHandler;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.HttpResponseException;
import org.jclouds.rest.AuthorizationException;
import org.jclouds.rest.ResourceNotFoundException;
import com.abiquo.model.transport.error.ErrorsDto;
import com.google.common.io.Closeables;
/**
* Parse Abiquo API errors and set the appropriate exception.
*
* @author Ignasi Barrera
*/
@Singleton
public class AbiquoErrorHandler implements HttpErrorHandler {
/** The error parser. */
private ParseErrors errorParser;
@Inject
AbiquoErrorHandler(final ParseErrors errorParser) {
super();
this.errorParser = errorParser;
}
@Override
public void handleError(final HttpCommand command, final HttpResponse response) {
Exception exception = null;
String defaultMessage = String.format("%s -> %s", command.getCurrentRequest().getRequestLine(),
response.getStatusLine());
try {
switch (response.getStatusCode()) {
case 401:
case 403:
// Authorization exceptions do not return an errors DTO, so we
// encapsulate a
// generic exception
exception = new AuthorizationException(defaultMessage, new HttpResponseException(command, response,
defaultMessage));
break;
case 404:
exception = new ResourceNotFoundException(defaultMessage, getExceptionToPropagate(command, response,
defaultMessage));
break;
case 301:
// Moved resources in Abiquo should be handled with the
// ReturnMovedResource
// exception parser to return the moved entity.
exception = new HttpResponseException(command, response, defaultMessage);
break;
default:
exception = getExceptionToPropagate(command, response, defaultMessage);
break;
}
} finally {
try {
Closeables.close(response.getPayload(), true);
command.setException(exception);
} catch (IOException e) {
throw propagate(e);
}
}
}
private Exception getExceptionToPropagate(final HttpCommand command, final HttpResponse response,
final String defaultMessage) {
Exception exception = null;
if (hasPayload(response)) {
try {
ErrorsDto errors = errorParser.apply(response);
exception = new AbiquoException(fromStatusCode(response.getStatusCode()), errors);
} catch (Exception ex) {
// If it is not an Abiquo Exception (can not be unmarshalled),
// propagate a standard
// HttpResponseException
exception = new HttpResponseException(command, response, defaultMessage);
}
} else {
// If it is not an Abiquo Exception (there is not an errors xml in the
// payload)
// propagate a standard HttpResponseException
exception = new HttpResponseException(command, response, defaultMessage);
}
return exception;
}
private static boolean hasPayload(final HttpResponse response) {
return response.getPayload() != null && response.getPayload().getContentMetadata() != null
&& response.getPayload().getContentMetadata().getContentLength() != null
&& response.getPayload().getContentMetadata().getContentLength() > 0L;
}
}