/*
 * Copyright 2018 LinkedIn Corp.
 *
 * 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 azkaban.common;

import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.codehaus.jackson.map.ObjectMapper;


/**
 * Common utility methods for Azkaban Executor side servlets
 */
public class ServletUtils {

  public static final String JSON_MIME_TYPE = "application/json";

  /**
   * Write an Object to HttpResponse in Json format.
   * @param resp
   * @param obj
   * @throws IOException
   */
  public static void writeJSON(final HttpServletResponse resp, final Object obj)
      throws IOException {
    resp.setContentType(JSON_MIME_TYPE);
    final ObjectMapper mapper = new ObjectMapper();
    final OutputStream stream = resp.getOutputStream();
    mapper.writeValue(stream, obj);
  }

}
