content: /**
   * 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 org.apache.oozie.ambari.view;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Map;
  
  import org.apache.ambari.view.URLStreamProvider;
  import org.apache.ambari.view.ViewContext;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class AmbariIOUtil {
  	private final static Logger LOGGER = LoggerFactory
  			.getLogger(AmbariIOUtil.class);
  	private ViewContext viewContext;
  
  	public AmbariIOUtil(ViewContext viewContext) {
  		super();
  		this.viewContext = viewContext;
  	}
  
  	public InputStream readFromUrl(String urlToRead, String method,
  			String body, Map<String, String> newHeaders) {
  		URLStreamProvider streamProvider = viewContext.getURLStreamProvider();
  		InputStream stream = null;
  		try {
  			if (isSecurityEnabled()) {
  				stream = streamProvider.readAsCurrent(urlToRead, method, body,
  						newHeaders);
  
  			} else {
  				stream = streamProvider.readFrom(urlToRead, method, body,
  						newHeaders);
  			}
  		} catch (IOException e) {
  			LOGGER.error("error talking to oozie", e);
  			throw new RuntimeException(e);
  		}
  		return stream;
  	}
  
  	private boolean isSecurityEnabled() {
  		String securityEnbaled = viewContext.getProperties()
  					             .get("hadoop.security.authentication");
  		return !"simple".equalsIgnoreCase(securityEnbaled);
  	}
  }
  