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RESTErrorHandler.java
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RESTErrorHandler.java
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/*
* Copyright 2013 LinkedIn, 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 voldemort.coordinator;
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_LENGTH;
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE;
import static org.jboss.netty.handler.codec.http.HttpVersion.HTTP_1_1;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.util.CharsetUtil;
import voldemort.VoldemortException;
/**
* A Generic class used to propagate the error back to the client over the Netty
* channel
*
*/
public class RESTErrorHandler {
static CoordinatorErrorStats errorStats;
public static void setErrorStatsHandler(CoordinatorErrorStats errorStatsObj) {
errorStats = errorStatsObj;
}
public static void handleError(HttpResponseStatus status, MessageEvent e, String message) {
errorStats.reportException(new VoldemortException());
// 1. Create the Response object
HttpResponse response = new DefaultHttpResponse(HTTP_1_1, status);
response.setHeader(CONTENT_TYPE, "text/plain; charset=UTF-8");
response.setContent(ChannelBuffers.copiedBuffer("Failure: " + status.toString() + ". "
+ message + "\r\n", CharsetUtil.UTF_8));
response.setHeader(CONTENT_LENGTH, response.getContent().readableBytes());
// Write the response to the Netty Channel
e.getChannel().write(response);
}
}