HandlerException.java

/*
 * Copyright © 2014 Cask Data, 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 co.cask.cdap.common;

import com.google.common.base.Charsets;
import org.jboss.netty.buffer.ChannelBuffers;
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.handler.codec.http.HttpVersion;

/**
 * Exception handling for failures in netty pipeline.
 */
public final class HandlerException extends RuntimeException {

  private final HttpResponseStatus failureStatus;
  private String message;

  public HandlerException(HttpResponseStatus failureStatus, String message) {
    super(message);
    this.failureStatus = failureStatus;
    this.message = message;
  }

  public HandlerException(HttpResponseStatus failureStatus, String message, Throwable cause) {
    super(message, cause);
    this.failureStatus = failureStatus;
    this.message = message;
  }

  public HttpResponse createFailureResponse() {
    HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, failureStatus);
    response.setContent(ChannelBuffers.copiedBuffer(message, Charsets.UTF_8));
    return response;
  }

  public HttpResponseStatus getFailureStatus() {
    return failureStatus;
  }

  public String getMessage() {
    return message;
  }
}