/**
* Copyright © 2012 Alcatel-Lucent.
*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
* Licensed 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 com.alu.e3.gateway.common.camel.processor;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.log4j.Logger;
import com.alu.e3.common.camel.ExchangeConstantKeys;
import com.alu.e3.gateway.common.camel.exception.GatewayException;
import com.alu.e3.gateway.common.camel.exception.GatewayExceptionCode;
public class GatewayErrorProcessor implements Processor {
private static Logger logger = Logger.getLogger(GatewayErrorProcessor.class);
@Override
public void process(Exchange exchange) throws Exception {
boolean isNoteSpecialized = true;
Exception exception = exchange.getProperty(Exchange.EXCEPTION_CAUGHT, Exception.class);
if (exception instanceof GatewayException) {
GatewayException gatewayException = (GatewayException) exception;
if (gatewayException.getCode() == GatewayExceptionCode.AUTHORIZATION) {
String body = "Issue: " + gatewayException.getMessage();
createHttpErrorResponse(exchange, 401, body);
isNoteSpecialized = false;
} else if(gatewayException.getCode() == GatewayExceptionCode.AUTHORIZATION_BASIC) {
exchange.getOut().setHeader("WWW-Authenticate", "Basic realm=\"Secure Service\"");
String body = "Issue: " + gatewayException.getMessage();
createHttpErrorResponse(exchange, 401, body);
isNoteSpecialized = false;
} else if(gatewayException.getCode() == GatewayExceptionCode.API_NOT_ACTIVATED) {
String body = "Issue: " + gatewayException.getMessage();
createHttpErrorResponse(exchange, 403, body);
isNoteSpecialized = false;
} else if(gatewayException.getCode() == GatewayExceptionCode.VALIDATION) {
String body = "Issue: " + gatewayException.getMessage();
createHttpErrorResponse(exchange, 400, body);
isNoteSpecialized = false;
}
if (gatewayException.getCode() == GatewayExceptionCode.RATEORQUOTA) {
String body = "Issue: " + gatewayException.getMessage();
// Based on draft "Additional HTTP Status Codes; draft-nottingham-http-new-status-02"
// http://tools.ietf.org/html/draft-nottingham-http-new-status-02#page-4
createHttpErrorResponse(exchange, 429, "Too Many Requests", body);
isNoteSpecialized = false;
}
if (gatewayException.getCode() == GatewayExceptionCode.HTTP_METHOD) {
String body = "Issue: " + gatewayException.getMessage();
createHttpErrorResponse(exchange, 405, body);
isNoteSpecialized = false;
}
}
if (isNoteSpecialized) {
int errorCode = 500;
String body = "Issue: Internal Server Error\n" + exception.getMessage();
createHttpErrorResponse(exchange, errorCode, body);
isNoteSpecialized = false;
if (logger.isDebugEnabled()) {
logger.debug(exception.getMessage(), exception);
}
}
}
private void createHttpErrorResponse(Exchange exchange, int errorCode, String body) {
exchange.getOut().setHeader(Exchange.HTTP_RESPONSE_CODE, errorCode);
exchange.getOut().setHeader(Exchange.CONTENT_TYPE, "text/plain");
exchange.getOut().setBody(body);
}
private void createHttpErrorResponse(Exchange exchange, int errorCode, String errorMessage, String body) {
exchange.setProperty(ExchangeConstantKeys.E3_HTTP_STATUS_LINE_REASON_PHRASE.toString(), errorMessage);
createHttpErrorResponse(exchange, errorCode, body);
}
}