com.netflix.genie.client.interceptors.ResponseMappingInterceptor Maven / Gradle / Ivy
/*
*
* Copyright 2016 Netflix, Inc.
*
* 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 com.netflix.genie.client.interceptors;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.netflix.genie.client.exceptions.GenieClientException;
import com.netflix.genie.common.external.util.GenieObjectMapper;
import okhttp3.Interceptor;
import okhttp3.Response;
import okhttp3.ResponseBody;
import java.io.IOException;
import java.io.Reader;
/**
* Class that evaluates the retrofit response code and maps it to an appropriate Genie Exception.
*
* @author amsharma
* @since 3.0.0
*/
public class ResponseMappingInterceptor implements Interceptor {
private static final String NO_MESSAGE_FALLBACK = "No error detailed message in server response";
private static final String ERROR_MESSAGE_KEY = "message";
/**
* Constructor.
*/
public ResponseMappingInterceptor() {
}
/**
* {@inheritDoc}
*/
@Override
public Response intercept(final Chain chain) throws IOException {
final Response response = chain.proceed(chain.request());
if (response.isSuccessful()) {
return response;
} else {
final ResponseBody body = response.body();
if (body != null) {
final Reader bodyReader = body.charStream();
if (bodyReader != null) {
try {
final JsonNode responseBody = GenieObjectMapper.getMapper().readTree(bodyReader);
final String errorMessage =
responseBody == null || !responseBody.has(ERROR_MESSAGE_KEY)
? NO_MESSAGE_FALLBACK
: responseBody.get(ERROR_MESSAGE_KEY).asText();
throw new GenieClientException(
response.code(),
errorMessage
);
} catch (final JsonProcessingException jpe) {
throw new GenieClientException("Failed to parse server response as JSON", jpe);
}
}
}
throw new GenieClientException(response.code(), "Server response body is empty");
}
}
}