/**
* 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.ambari.view.jobs;
import java.lang.String;
import java.util.HashMap;
import java.util.Map;
import org.apache.ambari.view.ViewContext;
import com.google.inject.Inject;
import com.google.inject.Singleton;
/**
* Implementation of controller to handle requests for the Jobs View.
*/
@Singleton
public class ViewControllerImpl implements ViewController {
@Inject
private ViewContext viewContext;
/**
* Because only an admin user is allowed to see the properties in
* api/v1/views/JOBS/versions/{version_number}/instances/{instance_name}/ ,
* we need a way for all users to see the basic properties of the Jobs View, primarily
* the YARN ATS URL and YARN Resource Manager URL
* @return Get the properties that any user is allowed to see, even non-admin users.
*/
@Override
public ViewStatus getViewStatus() {
ViewStatus status = new ViewStatus();
Map<String, String> parameters = new HashMap<String, String>();
parameters.put(ViewController.PARAM_YARN_ATS_URL, getViewParameterValue(ViewController.PARAM_YARN_ATS_URL));
parameters.put(ViewController.PARAM_YARN_RESOURCEMANAGER_URL, getViewParameterValue(ViewController.PARAM_YARN_RESOURCEMANAGER_URL));
status.setParameters(parameters);
return status;
}
/**
* @param parameterName Parameter to get the value for
* @return Returns the value of the given parameter
*/
private String getViewParameterValue(String parameterName) {
String value = viewContext.getProperties().get(parameterName);
if ("null".equals(value)) {
return null;
}
return value;
}
}