engine/src/main/java/com/datatorrent/stram/util/HeaderClientFilter.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * 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.datatorrent.stram.util;

import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.core.Cookie;
import javax.ws.rs.core.MultivaluedMap;

import com.sun.jersey.api.client.ClientHandlerException;
import com.sun.jersey.api.client.ClientRequest;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.filter.ClientFilter;

/**
 * <p>HeaderClientFilter class.</p>
 *
 * @since 0.9.2
 */
public class HeaderClientFilter extends ClientFilter
{
  private static final String COOKIE_HEADER = "Cookie";

  private List<Cookie> cookies = new ArrayList<>();

  public void addCookie(Cookie cookie)
  {
    cookies.add(cookie);
  }

  @Override
  public ClientResponse handle(ClientRequest clientRequest) throws ClientHandlerException
  {
    final MultivaluedMap<String, Object> headers = clientRequest.getHeaders();
    List<Object> hcookies = headers.get(COOKIE_HEADER);
    if (hcookies == null) {
      hcookies = new ArrayList<>();
    }
    hcookies.addAll(cookies);
    headers.put(COOKIE_HEADER, hcookies);
    return getNext().handle(clientRequest);
  }
}