/**
* 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.apache.camel.component.olingo2.api.impl;
import java.io.IOException;
import org.apache.camel.component.olingo2.api.Olingo2ResponseHandler;
import org.apache.http.HttpHeaders;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.concurrent.FutureCallback;
import org.apache.olingo.odata2.api.commons.HttpStatusCodes;
import org.apache.olingo.odata2.api.ep.EntityProvider;
import org.apache.olingo.odata2.api.ep.EntityProviderException;
import org.apache.olingo.odata2.api.exception.ODataApplicationException;
import org.apache.olingo.odata2.api.exception.ODataException;
import org.apache.olingo.odata2.api.processor.ODataErrorContext;
import org.apache.olingo.odata2.core.commons.ContentType;
/**
* Helper implementation of {@link org.apache.http.concurrent.FutureCallback}
* for {@link org.apache.camel.component.olingo2.api.impl.Olingo2AppImpl}
*/
public abstract class AbstractFutureCallback<T> implements FutureCallback<HttpResponse> {
private final Olingo2ResponseHandler<T> responseHandler;
AbstractFutureCallback(Olingo2ResponseHandler<T> responseHandler) {
this.responseHandler = responseHandler;
}
public static HttpStatusCodes checkStatus(HttpResponse response) throws ODataApplicationException {
final StatusLine statusLine = response.getStatusLine();
HttpStatusCodes httpStatusCode = HttpStatusCodes.fromStatusCode(statusLine.getStatusCode());
if (400 <= httpStatusCode.getStatusCode() && httpStatusCode.getStatusCode() <= 599) {
if (response.getEntity() != null) {
try {
final ContentType responseContentType = ContentType.create(
response.getFirstHeader(HttpHeaders.CONTENT_TYPE).getValue());
switch (responseContentType.getODataFormat()) {
case ATOM:
case XML:
case JSON:
final ODataErrorContext errorContext = EntityProvider.readErrorDocument(
response.getEntity().getContent(),
responseContentType.toString());
throw new ODataApplicationException(errorContext.getMessage(),
errorContext.getLocale(), httpStatusCode, errorContext.getErrorCode(),
errorContext.getException());
default:
// fall through to default exception with status line information
}
} catch (EntityProviderException e) {
throw new ODataApplicationException(e.getMessage(), response.getLocale(), httpStatusCode, e);
} catch (IOException e) {
throw new ODataApplicationException(e.getMessage(), response.getLocale(), httpStatusCode, e);
}
}
throw new ODataApplicationException(statusLine.getReasonPhrase(), response.getLocale(), httpStatusCode);
}
return httpStatusCode;
}
@Override
public final void completed(HttpResponse result) {
try {
// check response status
checkStatus(result);
onCompleted(result);
} catch (Exception e) {
failed(e);
}
}
protected abstract void onCompleted(HttpResponse result) throws ODataException, IOException;
@Override
public final void failed(Exception ex) {
responseHandler.onException(ex);
}
@Override
public final void cancelled() {
responseHandler.onCanceled();
}
}