/**
* 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.tez;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import org.apache.ambari.view.ViewContext;
import org.apache.ambari.view.tez.exceptions.TezWebAppException;
import org.apache.ambari.view.utils.ambari.AmbariApi;
import org.apache.ambari.view.utils.ambari.AmbariApiException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
import java.util.Map;
/**
* Implementation of controller to handle requests for the tez View.
*/
@Singleton
public class ViewControllerImpl implements ViewController {
private AmbariApi ambariApi;
private static final Logger LOG = LoggerFactory.getLogger(ViewControllerImpl.class);
@Inject
public ViewControllerImpl(ViewContext viewContext) {
this.ambariApi = new AmbariApi(viewContext);
}
/**
* Because only an admin user is allowed to see the properties in
* api/v1/views/tez/versions/{version_number}/instances/{instance_name}/ ,
* we need a way for all users to see the basic properties of the tez 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, getActiveATSUrl());
parameters.put(ViewController.PARAM_YARN_RESOURCEMANAGER_URL, getActiveRMUrl());
parameters.put(ViewController.PARAM_YARN_PROTOCOL, getYARNProtocol());
status.setParameters(parameters);
return status;
}
@Override
public String getActiveATSUrl() {
try {
return ambariApi.getServices().getTimelineServerUrl();
} catch (AmbariApiException ex) {
String message = "Failed to find YARN Timeline Server location!";
LOG.error(message, ex);
throw new TezWebAppException(message, ex);
}
}
@Override
public String getActiveRMUrl() {
try {
return ambariApi.getServices().getRMUrl();
} catch (AmbariApiException ex) {
String message = "Failed to find Active ResourceManager location!";
LOG.error(message, ex);
throw new TezWebAppException(message, ex);
}
}
@Override
public String getYARNProtocol() {
try {
return ambariApi.getServices().getYARNProtocol();
} catch (AmbariApiException ex) {
String message = "Failed to find YARN http/https protocol configuration value!";
LOG.error(message, ex);
throw new TezWebAppException(message, ex);
}
}
@Override
public String getRMAuthenticationType() {
return ambariApi.getServices().getHadoopHttpWebAuthType();
}
@Override
public String getATSAuthenticationType() {
return ambariApi.getServices().getTimelineServerAuthType();
}
}