/**
* 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.server.controller.utilities;
import org.apache.ambari.server.controller.spi.ProviderModule;
import org.apache.ambari.server.controller.internal.ClusterControllerImpl;
import org.apache.ambari.server.controller.spi.ClusterController;
import org.apache.ambari.server.view.ViewProviderModule;
/**
* Temporary class to bootstrap a cluster controller. TODO : Replace this global state with injection.
*/
public class ClusterControllerHelper {
private static String PROVIDER_MODULE_CLASS = System.getProperty("provider.module.class",
"org.apache.ambari.server.controller.internal.DefaultProviderModule");
private static ClusterController controller;
public static synchronized ClusterController getClusterController() {
if (controller == null) {
try {
Class<?> implClass = Class.forName(PROVIDER_MODULE_CLASS);
ProviderModule providerModule = ViewProviderModule.getViewProviderModule((ProviderModule) implClass.newInstance());
controller = new ClusterControllerImpl(providerModule);
} catch (Exception e) {
throw new IllegalStateException("Can't create provider module " + PROVIDER_MODULE_CLASS, e);
}
}
return controller;
}
}